2024/11/18日工作总结

完成java课堂测试：前端页面实现数据库的增功能：
mapper：

点击查看代码

package com.vivy.mapper;
import com.vivy.pojo.Classes;import java.util.List;public interface ClassesMapper {void add(Classes classes);void delete(String s);List<Classes> selectAll();}
pojo:
<details>
<summary>点击查看代码</summary>

package com.vivy.pojo;

public class Classes {
int id;
String classId;
String className;
int number;
String teacherName;
String position;

public int getId() {return id;
}public void setId(int id) {this.id = id;
}public String getClassId() {return classId;
}public void setClassId(String classId) {this.classId = classId;
}public String getClassName() {return className;
}public void setClassName(String className) {this.className = className;
}public int getNumber() {return number;
}public void setNumber(int number) {this.number = number;
}public String getTeacherName() {return teacherName;
}public void setTeacherName(String teacherName) {this.teacherName = teacherName;
}public String getPosition() {return position;
}public void setPosition(String position) {this.position = position;
}@Override
public String toString() {return "Class{" +"id=" + id +", classId='" + classId + '\'' +", className='" + className + '\'' +", number=" + number +", teacherName='" + teacherName + '\'' +", position='" + position + '\'' +'}';
}

}

</details>

util:

点击查看代码

package com.vivy.util;import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;import java.io.IOException;
import java.io.InputStream;public class SqlSessionFactoryUtils {private static SqlSessionFactory sqlSessionFactory;static {//静态代码块会随着类的加载自动执行，且只执行一次try {String resource = "mybatis-config.xml";InputStream inputStream = Resources.getResourceAsStream(resource);sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);} catch (IOException e) {throw new RuntimeException(e);}}public static SqlSessionFactory getSqlSessionFactory(){return sqlSessionFactory;}
}

web:

点击查看代码

package com.vivy.web;import com.vivy.mapper.ClassesMapper;
import com.vivy.pojo.Classes;
import com.vivy.util.SqlSessionFactoryUtils;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.IOException;
import java.nio.charset.StandardCharsets;@WebServlet("/addCourseServlet")
public class addCourseServlet extends HttpServlet {@Overrideprotected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {request.setCharacterEncoding("UTF-8");String classId = request.getParameter("classId");String className = request.getParameter("className");String number = request.getParameter("number");String teacherName = request.getParameter("teacherName");String position = request.getParameter("position");//# = new String(classId.getBytes(StandardCharsets.ISO_8859_1),StandardCharsets.UTF_8);Classes classes = new Classes();classes.setClassId(classId);classes.setClassName(className);classes.setNumber(Integer.parseInt(number));classes.setTeacherName(teacherName);classes.setPosition(position);SqlSessionFactory sqlSessionFactory = SqlSessionFactoryUtils.getSqlSessionFactory();SqlSession sqlSession = sqlSessionFactory.openSession();ClassesMapper classesMapper = sqlSession.getMapper(ClassesMapper.class);classesMapper.add(classes);sqlSession.commit();sqlSession.close();}@Overrideprotected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {this.doGet(request, response);}
}

mapper:

点击查看代码

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"><!--接口全路径名-->
<mapper namespace="com.vivy.mapper.ClassesMapper"><select id="selectAll" resultType="classes">select * from tb_class;</select><insert id="add" useGeneratedKeys="true" keyProperty="id">insert into tb_class (class_id, class_name, number, teacher_name, position)values (#{classId}, #{className}, #{number}, #{teacherName}, #{position});</insert></mapper>

WEB-INF:

点击查看代码

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>新增课程</title>
</head>
<body>
<h2>新增课程</h2>
<form id="add-form" action="/course-demo/addCourseServlet" method="post">课程编号：<input name="classId" type="text" id="classId" ><br>课程名称：<input name="className" type="text" id="className" ><br>选课人数：<input name="number" type="number" id="number" ><br>任课教师：<input name="teacherName" type="text" id="teacherName" ><br>上课地点：<input name="position" type="text" id="position" ><br><div class="buttons"><input value="添加课程" type="submit" id="add_btn"></div><br class="clear">
</form></body>
</html>