目录
引言
一、前期准备
1.1.搭建Maven环境
1.2.导入pom.xml依赖
1.3.导入配置文件
①jdbc.properties
②generatorConfig.xml
③log4j2.xml
④spring-mybatis.xml
⑤spring-context.xml
⑥spring-mvc.xml
⑦修改web.xml文件
二、逆向生成增删改查
2.1.导入相关util类
①StringUtils.java
②PageBean.java
2.2.aspect切面层
2.3.Mybatis generator逆向生成
2.4.根据生成代码编写Biz层与实现类
三、controller层代码编写
四、前台代码与分页代码
①PageTag.java
②zking.tld
③list.jsp
④edit.jsp
五、案例测试
5.1.模糊查询
5.2.新增
5.3.修改
5.4.删除
5.5.分页
引言
在上一篇文章中我们讲解了Spring MVC的注解、参数传递、返回值和页面跳转的关键步骤,
这篇文章，我来讲解一下利用前面所学知识，实现SpringMVC一个Maven项目的增删改查。
一、前期准备
1.1.搭建Maven环境
右击项目名➡new➡module
选择maven项目➡选择jdk版本➡选择webapp
输入项目名
选择好maven项目的文件位置➡点击添加按钮➡配置好参数
1.2.导入pom.xml依赖
①将<properties>与<dependencies>标签内容进行替换即可。
<properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><maven.compiler.source>1.8</maven.compiler.source><maven.compiler.target>1.8</maven.compiler.target><maven.compiler.plugin.version>3.7.0</maven.compiler.plugin.version><!--添加jar包依赖--><!--1.spring 5.0.2.RELEASE相关--><spring.version>5.0.2.RELEASE</spring.version><!--2.mybatis相关--><mybatis.version>3.4.5</mybatis.version><!--mysql--><mysql.version>5.1.44</mysql.version><!--pagehelper分页jar依赖--><pagehelper.version>5.1.2</pagehelper.version><!--mybatis与spring集成jar依赖--><mybatis.spring.version>1.3.1</mybatis.spring.version><!--3.dbcp2连接池相关 druid--><commons.dbcp2.version>2.1.1</commons.dbcp2.version><commons.pool2.version>2.4.3</commons.pool2.version><!--4.log日志相关--><log4j2.version>2.9.1</log4j2.version><log4j2.disruptor.version>3.2.0</log4j2.disruptor.version><slf4j.version>1.7.13</slf4j.version><!--5.其他--><junit.version>4.12</junit.version><servlet.version>4.0.0</servlet.version><lombok.version>1.18.2</lombok.version><mybatis.ehcache.version>1.1.0</mybatis.ehcache.version><ehcache.version>2.10.0</ehcache.version><redis.version>2.9.0</redis.version><redis.spring.version>1.7.1.RELEASE</redis.spring.version><jackson.version>2.9.3</jackson.version><jstl.version>1.2</jstl.version><standard.version>1.1.2</standard.version><tomcat-jsp-api.version>8.0.47</tomcat-jsp-api.version><commons-fileupload.version>1.3.3</commons-fileupload.version><hibernate-validator.version>5.0.2.Final</hibernate-validator.version><shiro.version>1.3.2</shiro.version></properties>
//-------------------------------------------<dependencies><!--1.spring相关--><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-orm</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-tx</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-aspects</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>${spring.version}</version></dependency><!--2.mybatis相关--><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>${mybatis.version}</version></dependency><!--mysql--><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>${mysql.version}</version></dependency><!--pagehelper分页插件jar包依赖--><dependency><groupId>com.github.pagehelper</groupId><artifactId>pagehelper</artifactId><version>${pagehelper.version}</version></dependency><!--mybatis与spring集成jar包依赖--><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>${mybatis.spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context-support</artifactId><version>${spring.version}</version></dependency><!--mybatis与ehcache整合--><dependency><groupId>org.mybatis.caches</groupId><artifactId>mybatis-ehcache</artifactId><version>${mybatis.ehcache.version}</version></dependency><!--ehcache依赖--><dependency><groupId>net.sf.ehcache</groupId><artifactId>ehcache</artifactId><version>${ehcache.version}</version></dependency><dependency><groupId>redis.clients</groupId><artifactId>jedis</artifactId><version>${redis.version}</version></dependency><dependency><groupId>org.springframework.data</groupId><artifactId>spring-data-redis</artifactId><version>${redis.spring.version}</version></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>${jackson.version}</version></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-core</artifactId><version>${jackson.version}</version></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-annotations</artifactId><version>${jackson.version}</version></dependency><!--3.dbcp2连接池相关--><dependency><groupId>org.apache.commons</groupId><artifactId>commons-dbcp2</artifactId><version>${commons.dbcp2.version}</version><exclusions><exclusion><artifactId>commons-pool2</artifactId><groupId>org.apache.commons</groupId></exclusion></exclusions></dependency><dependency><groupId>org.apache.commons</groupId><artifactId>commons-pool2</artifactId><version>${commons.pool2.version}</version></dependency><!--springmvc依赖--><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>${spring.version}</version></dependency><!--4.log日志相关依赖--><!-- log4j2日志相关依赖 --><!-- log配置：Log4j2 + Slf4j --><!-- slf4j核心包--><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-api</artifactId><version>${slf4j.version}</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>jcl-over-slf4j</artifactId><version>${slf4j.version}</version><scope>runtime</scope></dependency><!--核心log4j2jar包--><dependency><groupId>org.apache.logging.log4j</groupId><artifactId>log4j-api</artifactId><version>${log4j2.version}</version></dependency><dependency><groupId>org.apache.logging.log4j</groupId><artifactId>log4j-core</artifactId><version>${log4j2.version}</version></dependency><!--用于与slf4j保持桥接--><dependency><groupId>org.apache.logging.log4j</groupId><artifactId>log4j-slf4j-impl</artifactId><version>${log4j2.version}</version></dependency><!--web工程需要包含log4j-web，非web工程不需要--><dependency><groupId>org.apache.logging.log4j</groupId><artifactId>log4j-web</artifactId><version>${log4j2.version}</version><scope>runtime</scope></dependency><!--需要使用log4j2的AsyncLogger需要包含disruptor--><dependency><groupId>com.lmax</groupId><artifactId>disruptor</artifactId><version>${log4j2.disruptor.version}</version></dependency><!--5.其他--><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>${junit.version}</version><scope>test</scope></dependency><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>${servlet.version}</version><scope>provided</scope></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>${lombok.version}</version><scope>provided</scope></dependency><dependency><groupId>jstl</groupId><artifactId>jstl</artifactId><version>${jstl.version}</version></dependency><dependency><groupId>taglibs</groupId><artifactId>standard</artifactId><version>${standard.version}</version></dependency><dependency><groupId>org.apache.tomcat</groupId><artifactId>tomcat-jsp-api</artifactId><version>${tomcat-jsp-api.version}</version></dependency><dependency><groupId>commons-fileupload</groupId><artifactId>commons-fileupload</artifactId><version>${commons-fileupload.version}</version></dependency><dependency><groupId>org.hibernate</groupId><artifactId>hibernate-validator</artifactId><version>${hibernate-validator.version}</version></dependency><!--shiro依赖--><dependency><groupId>org.apache.shiro</groupId><artifactId>shiro-core</artifactId><version>${shiro.version}</version></dependency><dependency><groupId>org.apache.shiro</groupId><artifactId>shiro-web</artifactId><version>${shiro.version}</version></dependency><dependency><groupId>org.apache.shiro</groupId><artifactId>shiro-spring</artifactId><version>${shiro.version}</version></dependency></dependencies>②<build>标签内将<pluginManagement>标签删除（解除版本锁定），加入<resources>。
可以确保mybatis-generator-maven-plugin在运行时能够正确地将所需的文件复制到目标文件夹中，避免出现缺少文件或配置错误的问题。
<build><finalName>xwzyssm</finalName><resources><!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题--><resource><directory>src/main/java</directory><includes><include>**/*.xml</include></includes></resource><!--解决mybatis-generator-maven-plugin运行时没有将jdbc.properites文件放入target文件夹的问题--><resource><directory>src/main/resources</directory><includes><include>*.properties</include><include>*.xml</include></includes></resource></resources><pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) --><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>${maven.compiler.plugin.version}</version><configuration><source>${maven.compiler.source}</source><target>${maven.compiler.target}</target><encoding>${project.build.sourceEncoding}</encoding></configuration></plugin><plugin><groupId>org.mybatis.generator</groupId><artifactId>mybatis-generator-maven-plugin</artifactId><version>1.3.2</version><dependencies><!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>${mysql.version}</version></dependency></dependencies><configuration><overwrite>true</overwrite></configuration></plugin><plugin><artifactId>maven-clean-plugin</artifactId><version>3.1.0</version></plugin><!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging --><plugin><artifactId>maven-resources-plugin</artifactId><version>3.0.2</version></plugin><plugin><artifactId>maven-compiler-plugin</artifactId><version>3.8.0</version></plugin><plugin><artifactId>maven-surefire-plugin</artifactId><version>2.22.1</version></plugin><plugin><artifactId>maven-war-plugin</artifactId><version>3.2.2</version></plugin><plugin><artifactId>maven-install-plugin</artifactId><version>2.5.2</version></plugin><plugin><artifactId>maven-deploy-plugin</artifactId><version>2.8.2</version></plugin></plugins></pluginManagement></build>③在pom.xml中，将junit的scope（依赖作用的范围）注释方便我们使用。
1.3.导入配置文件
导入羡慕之前先将Maven的目录结构补齐
①jdbc.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://47.100.191.44:3308/mybatis_ssm?useUnicode=true&characterEncoding=UTF-8
jdbc.username=123
jdbc.password=123②generatorConfig.xml
将逆向生成的代码所在的包名进行更改即可。
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN""http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" >
<generatorConfiguration><!-- 引入配置文件 --><properties resource="jdbc.properties"/><!--指定数据库jdbc驱动jar包的位置--><classPathEntry location="E:\\apache-maven-3.5.0-bin\\mvn_Repository\\mysql\\mysql-connector-java\\5.1.44"/><!-- 一个数据库一个context --><context id="infoGuardian"><!-- 注释 --><commentGenerator><property name="suppressAllComments" value="true"/><!-- 是否取消注释 --><property name="suppressDate" value="true"/> <!-- 是否生成注释代时间戳 --></commentGenerator><!-- jdbc连接 --><jdbcConnection driverClass="${jdbc.driver}"connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/><!-- 类型转换 --><javaTypeResolver><!-- 是否使用bigDecimal， false可自动转化以下类型（Long, Integer, Short, etc.） --><property name="forceBigDecimals" value="false"/></javaTypeResolver><!-- 01 指定javaBean生成的位置 --><!-- targetPackage：指定生成的model生成所在的包名 --><!-- targetProject：指定在该项目下所在的路径 --><javaModelGenerator targetPackage="com.csdn.xw.model"targetProject="src/main/java"><!-- 是否允许子包，即targetPackage.schemaName.tableName --><property name="enableSubPackages" value="false"/><!-- 是否对model添加构造函数 --><property name="constructorBased" value="true"/><!-- 是否针对string类型的字段在set的时候进行trim调用 --><property name="trimStrings" value="false"/><!-- 建立的Model对象是否 不可改变 即生成的Model对象不会有 setter方法，只有构造方法 --><property name="immutable" value="false"/></javaModelGenerator><!-- 02 指定sql映射文件生成的位置 --><sqlMapGenerator targetPackage="com.csdn.xw.mapper"targetProject="src/main/java"><!-- 是否允许子包，即targetPackage.schemaName.tableName --><property name="enableSubPackages" value="false"/></sqlMapGenerator><!-- 03 生成XxxMapper接口 --><!-- type="ANNOTATEDMAPPER",生成Java Model 和基于注解的Mapper对象 --><!-- type="MIXEDMAPPER",生成基于注解的Java Model 和相应的Mapper对象 --><!-- type="XMLMAPPER",生成SQLMap XML文件和独立的Mapper接口 --><javaClientGenerator targetPackage="com.csdn.xw.mapper"targetProject="src/main/java" type="XMLMAPPER"><!-- 是否在当前路径下新加一层schema,false路径com.oop.eksp.user.model， true:com.oop.eksp.user.model.[schemaName] --><property name="enableSubPackages" value="false"/></javaClientGenerator><!-- 配置表信息 --><!-- schema即为数据库名 --><!-- tableName为对应的数据库表 --><!-- domainObjectName是要生成的实体类 --><!-- enable*ByExample是否生成 example类 --><!--<table schema="" tableName="t_book" domainObjectName="Book"--><!--enableCountByExample="false" enableDeleteByExample="false"--><!--enableSelectByExample="false" enableUpdateByExample="false">--><!--<!– 忽略列，不生成bean 字段 –>--><!--<!– <ignoreColumn column="FRED" /> –>--><!--<!– 指定列的java数据类型 –>--><!--<!– <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> –>--><!--</table>--><table schema="" tableName="t_mysql_student" domainObjectName="Student"enableCountByExample="false" enableDeleteByExample="false"enableSelectByExample="false" enableUpdateByExample="false"></table></context>
</generatorConfiguration>
③log4j2.xml
<?xml version="1.0" encoding="UTF-8"?><!-- status : 指定log4j本身的打印日志的级别.ALL< Trace < DEBUG < INFO < WARN < ERROR< FATAL < OFF。 monitorInterval : 用于指定log4j自动重新配置的监测间隔时间，单位是s,最小是5s. -->
<Configuration status="WARN" monitorInterval="30"><Properties><!-- 配置日志文件输出目录 ${sys:user.home} --><Property name="LOG_HOME">/root/workspace/lucenedemo/logs</Property><property name="ERROR_LOG_FILE_NAME">/root/workspace/lucenedemo/logs/error</property><property name="WARN_LOG_FILE_NAME">/root/workspace/lucenedemo/logs/warn</property><property name="PATTERN">%d{yyyy-MM-dd HH:mm:ss.SSS} [%t-%L] %-5level %logger{36} - %msg%n</property></Properties><Appenders><!--这个输出控制台的配置 --><Console name="Console" target="SYSTEM_OUT"><!-- 控制台只输出level及以上级别的信息(onMatch),其他的直接拒绝(onMismatch) --><ThresholdFilter level="trace" onMatch="ACCEPT"onMismatch="DENY" /><!-- 输出日志的格式 --><!-- %d{yyyy-MM-dd HH:mm:ss, SSS} : 日志生产时间 %p : 日志输出格式 %c : logger的名称%m : 日志内容，即 logger.info("message") %n : 换行符 %C : Java类名 %L : 日志输出所在行数 %M: 日志输出所在方法名 hostName : 本地机器名 hostAddress : 本地ip地址 --><PatternLayout pattern="${PATTERN}" /></Console><!--文件会打印出所有信息，这个log每次运行程序会自动清空，由append属性决定，这个也挺有用的，适合临时测试用 --><!--append为TRUE表示消息增加到指定文件中，false表示消息覆盖指定的文件内容，默认值是true --><File name="log" fileName="logs/test.log" append="false"><PatternLayoutpattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" /></File><!-- 这个会打印出所有的info及以下级别的信息，每次大小超过size， 则这size大小的日志会自动存入按年份-月份建立的文件夹下面并进行压缩，作为存档 --><RollingFile name="RollingFileInfo" fileName="${LOG_HOME}/info.log"filePattern="${LOG_HOME}/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log"><!--控制台只输出level及以上级别的信息（onMatch），其他的直接拒绝（onMismatch） --><ThresholdFilter level="info" onMatch="ACCEPT"onMismatch="DENY" /><PatternLayoutpattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" /><Policies><!-- 基于时间的滚动策略，interval属性用来指定多久滚动一次，默认是1 hour。 modulate=true用来调整时间：比如现在是早上3am，interval是4，那么第一次滚动是在4am，接着是8am，12am...而不是7am. --><!-- 关键点在于 filePattern后的日期格式，以及TimeBasedTriggeringPolicy的interval， 日期格式精确到哪一位，interval也精确到哪一个单位 --><!-- log4j2的按天分日志文件 : info-%d{yyyy-MM-dd}-%i.log --><TimeBasedTriggeringPolicy interval="1"modulate="true" /><!-- SizeBasedTriggeringPolicy:Policies子节点， 基于指定文件大小的滚动策略，size属性用来定义每个日志文件的大小. --><!-- <SizeBasedTriggeringPolicy size="2 kB" /> --></Policies></RollingFile><RollingFile name="RollingFileWarn" fileName="${WARN_LOG_FILE_NAME}/warn.log"filePattern="${WARN_LOG_FILE_NAME}/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log"><ThresholdFilter level="warn" onMatch="ACCEPT"onMismatch="DENY" /><PatternLayoutpattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" /><Policies><TimeBasedTriggeringPolicy /><SizeBasedTriggeringPolicy size="2 kB" /></Policies><!-- DefaultRolloverStrategy属性如不设置，则默认为最多同一文件夹下7个文件，这里设置了20 --><DefaultRolloverStrategy max="20" /></RollingFile><RollingFile name="RollingFileError" fileName="${ERROR_LOG_FILE_NAME}/error.log"filePattern="${ERROR_LOG_FILE_NAME}/$${date:yyyy-MM}/error-%d{yyyy-MM-dd-HH-mm}-%i.log"><ThresholdFilter level="error" onMatch="ACCEPT"onMismatch="DENY" /><PatternLayoutpattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" /><Policies><!-- log4j2的按分钟 分日志文件 : warn-%d{yyyy-MM-dd-HH-mm}-%i.log --><TimeBasedTriggeringPolicy interval="1"modulate="true" /><!-- <SizeBasedTriggeringPolicy size="10 MB" /> --></Policies></RollingFile></Appenders><!--然后定义logger，只有定义了logger并引入的appender，appender才会生效 --><Loggers><!--过滤掉spring和mybatis的一些无用的DEBUG信息 --><logger name="org.springframework" level="INFO"></logger><logger name="org.mybatis" level="INFO"></logger><!-- 第三方日志系统 --><logger name="org.springframework" level="ERROR" /><logger name="org.hibernate" level="ERROR" /><logger name="org.apache.struts2" level="ERROR" /><logger name="com.opensymphony.xwork2" level="ERROR" /><logger name="org.jboss" level="ERROR" /><!-- 配置日志的根节点 --><root level="all"><appender-ref ref="Console" /><appender-ref ref="RollingFileInfo" /><appender-ref ref="RollingFileWarn" /><appender-ref ref="RollingFileError" /></root></Loggers></Configuration>④spring-mybatis.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"xmlns:aop="http://www.springframework.org/schema/aop"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"><!--1. 注解式开发 --><!-- 注解驱动 --><context:annotation-config/><!-- 用注解方式注入bean，并指定查找范围：com.javaxl.ssm及子子孙孙包--><context:component-scan base-package="com.csdn.xw"/><context:property-placeholder location="classpath:jdbc.properties"/><bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource"destroy-method="close"><property name="driverClassName" value="${jdbc.driver}"/><property name="url" value="${jdbc.url}"/><property name="username" value="${jdbc.username}"/><property name="password" value="${jdbc.password}"/><!--初始连接数--><property name="initialSize" value="10"/><!--最大活动连接数--><property name="maxTotal" value="100"/><!--最大空闲连接数--><property name="maxIdle" value="50"/><!--最小空闲连接数--><property name="minIdle" value="10"/><!--设置为-1时，如果没有可用连接，连接池会一直无限期等待，直到获取到连接为止。--><!--如果设置为N（毫秒），则连接池会等待N毫秒，等待不到，则抛出异常--><property name="maxWaitMillis" value="-1"/></bean><!--4. spring和MyBatis整合 --><!--1) 创建sqlSessionFactory--><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><!-- 指定数据源 --><property name="dataSource" ref="dataSource"/><!-- 自动扫描XxxMapping.xml文件，**任意路径 --><property name="mapperLocations" value="classpath*:com/csdn/xw/**/mapper/*.xml"/><!-- 指定别名 --><property name="typeAliasesPackage" value="com/csdn/xw/**/model"/><!--配置pagehelper插件--><property name="plugins"><array><bean class="com.github.pagehelper.PageInterceptor"><property name="properties"><value>helperDialect=mysql</value></property></bean></array></property></bean><!--2) 自动扫描com/javaxl/ssm/**/mapper下的所有XxxMapper接口(其实就是DAO接口)，并实现这些接口，--><!-- 即可直接在程序中使用dao接口，不用再获取sqlsession对象--><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><!--basePackage 属性是映射器接口文件的包路径。--><!--你可以使用分号或逗号 作为分隔符设置多于一个的包路径--><property name="basePackage" value="com/csdn/xw/**/mapper"/><property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/></bean><bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource" /></bean><tx:annotation-driven transaction-manager="transactionManager" /><aop:aspectj-autoproxy/>
</beans>⑤spring-context.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"><!--Spring框架与mybatis整合的配置文件加载spring上下文--><import resource="classpath:spring-mybatis.xml"></import></beans>⑥spring-mvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context"xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:aop="http://www.springframework.org/schema/aop"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"><!--1) 扫描com.zking.zf及子子孙孙包下的控制器(扫描范围过大，耗时)--><context:component-scan base-package="com.csdn.xw"/><!--2) 此标签默认注册DefaultAnnotationHandlerMapping和AnnotationMethodHandlerAdapter --><mvc:annotation-driven /><!--3) 创建ViewResolver视图解析器 --><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><!-- viewClass需要在pom中引入两个包：standard.jar and jstl.jar --><property name="viewClass"value="org.springframework.web.servlet.view.JstlView"></property><property name="prefix" value="/WEB-INF/jsp/"/><property name="suffix" value=".jsp"/></bean><!--4) 单独处理图片、样式、js等资源 --><!-- <mvc:resources location="/css/" mapping="/css/**"/><mvc:resources location="/js/" mapping="/js/**"/><mvc:resources location="WEB-INF/images/" mapping="/images/**"/>--><!-- <mvc:resources location="/static/" mapping="/static/**"/>--><aop:aspectj-autoproxy/>
</beans>⑦修改web.xml文件
该配置文件的作用是创建一个基于Spring MVC框架的Web应用程序，并配置了相关的上下文、监听器和Servlet，以支持Spring的依赖注入和MVC模式的开发。
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"version="3.1"><display-name>Archetype Created Web Application</display-name><!-- Spring和web项目集成start --><!-- spring上下文配置文件 --><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring-context.xml</param-value></context-param><!-- 读取Spring上下文的监听器 --><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><!-- Spring和web项目集成end --><!-- 中文乱码处理 --><filter><filter-name>encodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><async-supported>true</async-supported><init-param><param-name>encoding</param-name><param-value>UTF-8</param-value></init-param></filter><filter-mapping><filter-name>encodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><!-- Spring MVC servlet --><servlet><servlet-name>SpringMVC</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><!--此参数可以不配置，默认值为：/WEB-INF/springmvc-servlet.xml--><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring-mvc.xml</param-value></init-param><load-on-startup>1</load-on-startup><!--web.xml 3.0的新特性，是否支持异步--><async-supported>true</async-supported></servlet><servlet-mapping><servlet-name>SpringMVC</servlet-name><url-pattern>/</url-pattern></servlet-mapping>
</web-app>二、逆向生成增删改查
2.1.导入相关util类
①StringUtils.java
package com.csdn.xw.util;public class StringUtils {// 私有的构造方法，保护此类不能在外部实例化private StringUtils() {}/*** 如果字符串等于null或去空格后等于""，则返回true，否则返回false* * @param s* @return*/public static boolean isBlank(String s) {boolean b = false;if (null == s || s.trim().equals("")) {b = true;}return b;}/*** 如果字符串不等于null或去空格后不等于""，则返回true，否则返回false* * @param s* @return*/public static boolean isNotBlank(String s) {return !isBlank(s);}}
②PageBean.java
package com.csdn.xw.util;import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.Map;/*** @author Java方文山* @compay csdn_Java方文山* @create 2023-09-07-16:28*/
public class PageBean {private int page = 1;// 页码private int rows = 10;// 页大小private int total = 0;// 总记录数private boolean pagination = true;// 是否分页private String url; //保存上一次请求的URLprivate Map<String,String[]> paramMap = new HashMap<>();// 保存上一次请求的参数/*** 初始化pagebean的，保存上一次请求的重要参数* @param req*/public void setRequest(HttpServletRequest req) {
// 1.1 需要保存上一次请求的URLthis.setUrl(req.getRequestURL().toString());
// 1.2 需要保存上一次请求的参数 bname、pricethis.setParamMap(req.getParameterMap());
// 1.3 需要保存上一次请求的分页设置 paginationthis.setPagination(req.getParameter("pagination"));
// 1.4 需要保存上一次请求的展示条目数this.setRows(req.getParameter("rows"));
// 1.5 初始化请求的页码 pagethis.setPage(req.getParameter("page"));}public void setPage(String page) {if(StringUtils.isNotBlank(page))this.setPage(Integer.valueOf(page));}public void setRows(String rows) {if(StringUtils.isNotBlank(rows))this.setRows(Integer.valueOf(rows));}public void setPagination(String pagination) {
// 只有在前台jsp填写了pagination=false，才代表不分页if(StringUtils.isNotBlank(pagination))this.setPagination(!"false".equals(pagination));}public String getUrl() {return url;}public void setUrl(String url) {this.url = url;}public Map<String, String[]> getParamMap() {return paramMap;}public void setParamMap(Map<String, String[]> paramMap) {this.paramMap = paramMap;}public PageBean() {super();}public int getPage() {return page;}public void setPage(int page) {this.page = page;}public int getRows() {return rows;}public void setRows(int rows) {this.rows = rows;}public int getTotal() {return total;}public void setTotal(int total) {this.total = total;}public void setTotal(String total) {this.total = Integer.parseInt(total);}public boolean isPagination() {return pagination;}public void setPagination(boolean pagination) {this.pagination = pagination;}/*** 获得起始记录的下标** @return*/public int getStartIndex() {return (this.page - 1) * this.rows;}/*** 最大页* @return*/public int maxPage() {
// total % rows == 0 ? total / rows : total / rows +1return this.total % this.rows == 0 ? this.total / this.rows : this.total / this.rows + 1;}/*** 下一页* @return*/public int nextPage() {
// 如果当前页小于最大页，那就下一页为当前页+1；如果不小于，说明当前页就是最大页，那就无需+1return this.page < this.maxPage() ? this.page + 1 : this.page;}/*** 上一页* @return*/public int previousPage() {return this.page > 1 ? this.page - 1 : this.page;}@Overridepublic String toString() {return "PageBean [page=" + page + ", rows=" + rows + ", total=" + total + ", pagination=" + pagination + "]";}}
2.2.aspect切面层
创建一个名为aspect的包，编写一个PageAspect切面类专门来做分页。
PageAspect
package com.csdn.xw.aspect;import com.csdn.xw.util.PageBean;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;import java.util.List;@Aspect
//代表当前类是切面类
@Component
//代表这个是交给Spring管理
public class PageAspect {/*** *：返回值* *..：无限包* *Biz：以Biz结尾的接口名* .pager：以pager方法* 只要同时匹配上诉四个条件，就会被列为目标对象* 上诉配置要生效，代理注释一定要打开：<aop:aspectj-autoproxy/>* @param args* @return* @throws Throwable*/@Around("execution(* *..*Biz.*Pager(..))")public Object invoke(ProceedingJoinPoint args) throws Throwable {Object[] params = args.getArgs();PageBean pageBean = null;for (Object param : params) {if(param instanceof PageBean){pageBean = (PageBean)param;break;}}if(pageBean != null && pageBean.isPagination())PageHelper.startPage(pageBean.getPage(),pageBean.getRows());Object list = args.proceed(params);if(null != pageBean && pageBean.isPagination()){PageInfo pageInfo = new PageInfo((List) list);pageBean.setTotal(pageInfo.getTotal()+"");}return list;}}@Around("execution(* *..*Biz.*Pager(..))")`：这是一个注解，表示这个切面将会拦截所有使用了Biz.Pager()`方法的方法，所以我们需要分页的代码在其方法后面，加上Pager并在Biz多传递一个PageBean参数即可。
2.3.Mybatis generator逆向生成
在pom.xml或者generatorConfig.xml处
右击➡Run Maven➡Plugins➡Mybatis-generator-maven-plugin➡单击mybatis-generator:generate
会在根据你配置文件中提供的路径进行逆向生成代码。
2.4.根据生成代码编写Biz层与实现类
由于我们还需要一个模糊查询的方法，所以在StudentMapper.xml中添加一个方法
<select id="selectBySnamePager" resultType="com.csdn.xw.model.Student" parameterType="com.csdn.xw.model.Student" >select<include refid="Base_Column_List" />from t_mysql_student<if test="sname != null">where sname like concat('%',#{sname},'%')</if></select>并在StudentMapper.java添加一个相对应的方法和注解@Repository
StudentBiz
public interface StudentBiz {int deleteByPrimaryKey(String sid);int insert(Student record);int insertSelective(Student record);Student selectByPrimaryKey(String sid);int updateByPrimaryKeySelective(Student record);int updateByPrimaryKey(Student record);List<Student> selectBySnamePager(Student student,PageBean PageBean);
}StudentBizImpl
package com.csdn.xw.Biz.Impl;import com.csdn.xw.Biz.StudentBiz;
import com.csdn.xw.mapper.StudentMapper;
import com.csdn.xw.model.Student;
import com.csdn.xw.util.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import java.util.List;/*** @author Java方文山* @compay csdn_Java方文山* @create 2023-09-07-16:22*/
@Service
public class StudentBizImpl implements StudentBiz {@Autowiredprivate StudentMapper studentMapper;@Overridepublic int deleteByPrimaryKey(String sid) {return studentMapper.deleteByPrimaryKey(sid);}@Overridepublic int insert(Student record) {return studentMapper.insert(record);}@Overridepublic int insertSelective(Student record) {return studentMapper.insertSelective(record);}@Overridepublic Student selectByPrimaryKey(String sid) {return studentMapper.selectByPrimaryKey(sid);}@Overridepublic int updateByPrimaryKeySelective(Student record) {return studentMapper.updateByPrimaryKeySelective(record);}@Overridepublic int updateByPrimaryKey(Student record) {return studentMapper.updateByPrimaryKey(record);}@Overridepublic List<Student> selectBySnamePager(Student student, PageBean PageBean) {return studentMapper.selectBySnamePager(student);}
}
至此，我们的增删改查加模糊查询的分页所有方法就写完了。
三、controller层代码编写
首先建一个名为web的包，随后建立一个StudentController。
StudentController
@Controller
@RequestMapping("/student")
public class StudentController {@Autowiredprivate StudentBiz stubiz;// 增@RequestMapping("/add")public String add(Student student){stubiz.insertSelective(student);return "redirect:list";}// 删@RequestMapping("/del")public String del(Student student){stubiz.deleteByPrimaryKey(student.getSid());return "redirect:list";}// 查@RequestMapping("/list")public String list(Student student, HttpServletRequest request){PageBean pageBean=new PageBean();pageBean.setRequest(request);List<Student> students = stubiz.selectBySnamePager(student, pageBean);request.setAttribute("slist",students);request.setAttribute("pageBean",pageBean);return "student/list";}
// 改@RequestMapping("/edit")public String edit(Student student){stubiz.updateByPrimaryKeySelective(student);return "redirect:list";}
// 模糊分页查询@RequestMapping("/PreSave")public String PreSave(Student student, HttpServletRequest request){if(student!=null && student.getSid()!=null){Student s = stubiz.selectByPrimaryKey(student.getSid());request.setAttribute("s",s);}return "student/edit";}}
查询这用的是绝对路径，所以还要加上student。
四、前台代码与分页代码
这里我需要用到分页，所以将以前我所编写的自定义分页标签加入。
首先建立一个名为tag的包，将PageTag.java导入
①PageTag.java
package com.csdn.xw.tag;import com.csdn.xw.util.PageBean;import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.BodyTagSupport;
import java.io.IOException;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;public class PageTag extends BodyTagSupport{private PageBean pageBean;// 包含了所有分页相关的元素public PageBean getPageBean() {return pageBean;}public void setPageBean(PageBean pageBean) {this.pageBean = pageBean;}@Overridepublic int doStartTag() throws JspException {
// 没有标签体，要输出内容JspWriter out = pageContext.getOut();try {out.print(toHTML());} catch (IOException e) {e.printStackTrace();}return super.doStartTag();}private String toHTML() {StringBuffer sb = new StringBuffer();
// 隐藏的form表单---这个就是上一次请求下次重新发的奥义所在
// 上一次请求的URLsb.append("<form action='"+pageBean.getUrl()+"' id='pageBeanForm' method='post'>");sb.append(" <input type='hidden' name='page'>");
// 上一次请求的参数Map<String, String[]> paramMap = pageBean.getParamMap();if(paramMap != null && paramMap.size() > 0) {Set<Entry<String, String[]>> entrySet = paramMap.entrySet();for (Entry<String, String[]> entry : entrySet) {
// 参数名String key = entry.getKey();
// 参数值for (String value : entry.getValue()) {
// 上一次请求的参数，再一次组装成了新的Form表单
// 注意：page参数每次都会提交，我们需要避免if(!"page".equals(key)) {sb.append(" <input type='hidden' name='"+key+"' value='"+value+"' >");}}}}sb.append("</form>");// 分页条sb.append("<ul class='pagination justify-content-center'>");sb.append(" <li class='page-item "+(pageBean.getPage() == 1 ? "disabled" : "")+"'><a class='page-link'");sb.append(" href='javascript:gotoPage(1)'>首页</a></li>");sb.append(" <li class='page-item "+(pageBean.getPage() == 1 ? "disabled" : "")+"'><a class='page-link'");sb.append(" href='javascript:gotoPage("+pageBean.previousPage()+")'><</a></li>");// less than 小于号
// sb.append(" <li class='page-item'><a class='page-link' href='#'>1</a></li>");
// sb.append(" <li class='page-item'><a class='page-link' href='#'>2</a></li>");sb.append(" <li class='page-item active'><a class='page-link' href='#'>"+pageBean.getPage()+"</a></li>");sb.append(" <li class='page-item "+(pageBean.getPage() == pageBean.maxPage() ? "disabled" : "")+"'><a class='page-link' href='javascript:gotoPage("+pageBean.nextPage()+")'>></a></li>");sb.append(" <li class='page-item "+(pageBean.getPage() == pageBean.maxPage() ? "disabled" : "")+"'><a class='page-link' href='javascript:gotoPage("+pageBean.maxPage()+")'>尾页</a></li>");sb.append(" <li class='page-item go-input'><b>到第</b><input class='page-link'");sb.append(" type='text' id='skipPage' name='' /><b>页</b></li>");sb.append(" <li class='page-item go'><a class='page-link'");sb.append(" href='javascript:skipPage()'>确定</a></li>");sb.append(" <li class='page-item'><b>共"+pageBean.getTotal()+"条</b></li>");sb.append("</ul>");// 分页执行的JS代码sb.append("<script type='text/javascript'>");sb.append(" function gotoPage(page) {");sb.append(" document.getElementById('pageBeanForm').page.value = page;");sb.append(" document.getElementById('pageBeanForm').submit();");sb.append(" }");sb.append(" function skipPage() {");sb.append(" var page = document.getElementById('skipPage').value;");sb.append(" if (!page || isNaN(page) || parseInt(page) < 1 || parseInt(page) > "+pageBean.maxPage()+") {");sb.append(" alert('请输入1~"+pageBean.maxPage()+"的数字');");sb.append(" return;");sb.append(" }");sb.append(" gotoPage(page);");sb.append(" }");sb.append("</script>");return sb.toString();}
}
将tld文件导入WEB-INF下
②zking.tld
<?xml version="1.0" encoding="UTF-8" ?><taglib xmlns="http://java.sun.com/xml/ns/j2ee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"version="2.0"><description>zking 1.1 core library</description><display-name>zking core</display-name><tlib-version>1.1</tlib-version><short-name>zking</short-name><uri>http://jsp.veryedu.cn</uri><tag><name>page</name><tag-class>com.csdn.xw.tag.PageTag</tag-class><body-content>JSP</body-content><attribute><name>pageBean</name><required>true</required><rtexprvalue>true</rtexprvalue></attribute></tag></taglib>
③list.jsp
<%--Created by IntelliJ IDEA.User: 索隆Date: 2023/9/8Time: 16:32To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="http://jsp.veryedu.cn" prefix="z"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<html>
<head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><linkhref="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.css"rel="stylesheet"><scriptsrc="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/js/bootstrap.js"></script><title>学生管理首页</title><style type="text/css">.page-item input {padding: 0;width: 40px;height: 100%;text-align: center;margin: 0 6px;}.page-item input, .page-item b {line-height: 38px;float: left;font-weight: 400;}.page-item.go-input {margin: 0 10px;}</style>
</head>
<body>
<form class="form-inline"action="${pageContext.request.contextPath }/student/list" method="post"><div class="form-group mb-2"><input type="text" class="form-control-plaintext" name="sname"placeholder="请输入学生名称"><!-- <input name="rows" value="20" type="hidden"> --><!-- 不想分页 --><%--<input name="pagination" value="false" type="hidden">--%></div><button type="submit" class="btn btn-primary mb-2">查询</button><a class="btn btn-primary mb-2" href="${pageContext.request.contextPath }/student/PreSave">新增</a>
</form><table class="table table-striped "><thead><tr><th scope="col">学生ID</th><th scope="col">学生名称</th><th scope="col">学生年龄</th><th scope="col">学生性别</th><th scope="col">操作</th></tr></thead><tbody><c:forEach var="s" items="${slist }"><tr><td>${s.sid }</td><td>${s.sname }</td><td>${s.sage }</td><td>${s.ssex }</td><td><a href="${pageContext.request.contextPath }/student/PreSave?sid=${s.sid}">修改</a><a href="${pageContext.request.contextPath }/student/del?sid=${s.sid}">删除</a></td></tr></c:forEach></tbody>
</table>
<!-- 这一行代码就相当于前面分页需求前端的几十行了 -->
<z:page pageBean="${pageBean }"></z:page>
${pageBean }
${slist}
</body>
</html>
④edit.jsp
<%--Created by IntelliJ IDEA.User: 索隆Date: 2023/9/8Time: 16:49To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>编辑界面</title>
</head>
<body>
<center>
编辑界面
<form action="${pageContext.request.contextPath }/${empty s ? 'student/add' : 'student/edit'}" method="post">sid:<input type="text" name="sid" value="${s.sid }"><br>sname:<input type="text" name="sname" value="${s.sname }"><br>sage:<input type="text" name="sage" value="${s.sage }"><br>ssex:<input type="text" name="ssex" value="${s.ssex }"><br><input type="submit">
</form>
</center>
</body>
</html>
五、案例测试
5.1.模糊查询
5.2.新增
5.3.修改
5.4.删除
5.5.分页
到这里我的分享就结束了，欢迎到评论区探讨交流！！
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