解决LocalDateTime传输前端为时间的数组-编程知识

解决LocalDateTime传输前端为时间的数组

问题出现如下：

问题出现原因：

默认序列化情况下会使用SerializationFeature.WRITE_DATES_AS_TIMESTAMPS。使用这个解析时就会打印出数组。

解决方法：

我在全文搜索处理方法总结如下：

1.前端自定义函数来书写

        ,cols: [[ //表头{type: 'checkbox', fixed: 'left'},{field: 'purchaseId', title: 'ID',  sort: true, fixed: 'left',hide:true},{field: 'supplierName', title: '供应商名称',sort: true}//当field是直属属性时，可以不用temple去获取！,{field: 'userName', title: '采购员', sort: true},{field: 'purchaseDate', title: '采购时间',sort: true,templet:function(resp){return dateArrayTransfer(resp.purchaseDate,'yyyy-MM-dd HH:mm:ss');}},{fixed:'right',title:'操作',toolbar:'#operatBtn'}function dateArrayTransfer(dateArray) {if(dateArray == null || dateArray == ''){return '';}var returnDate = dateArray[0]+"-"+returnDoubleNum(dateArray[1])+"-"+returnDoubleNum(dateArray[2])+" "+returnDoubleNum(dateArray[3])+":"+returnDoubleNum(dateArray[4])+":"+returnDoubleNum(dateArray[5]);return returnDate;
}
//保证两位数
function returnDoubleNum(number) {return (Array(2).join(0) + number).slice(-2);//创建一个长度为2的数组，且默认用0填充；然后用传过来的数添加都右边，然后从右向左截取两位！
}

2.后端处理：

两个方法

一、一劳永逸法：修改消息转换器

在WebMvcConfig配置类中扩展Spring Mvc的消息转换器，在此消息转换器中使用提供的对象转换器进行Java对象到json数据的转换()：

写在下面这个配置类里，继承了WebMvcConfiguer

package com.aqiuo.config;import com.aqiuo.Interceptor.LoginInterceptor;
import com.aqiuo.Interceptor.RefreshInterceptor;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import org.springframework.beans.factory.annotation.Autowired;import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.http.HttpOutputMessage;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.HttpMessageNotWritableException;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;import java.io.IOException;
import java.lang.reflect.Type;
import java.util.List;/*** 配置访问拦截器*/
@Configuration
public class MVCConfig implements WebMvcConfigurer {@AutowiredStringRedisTemplate stringRedisTemplate;@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(new LoginInterceptor(stringRedisTemplate)).addPathPatterns("/class").addPathPatterns("/course").excludePathPatterns("/user/login").excludePathPatterns("/user/register");registry.addInterceptor(new RefreshInterceptor(stringRedisTemplate)).addPathPatterns("/**");}@Overridepublic void extendMessageConverters(List<HttpMessageConverter<?>> converters) {MappingJackson2HttpMessageConverter jackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();ObjectMapper objectMapper = jackson2HttpMessageConverter.getObjectMapper();// 不显示为null的字段objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);SimpleModule simpleModule = new SimpleModule();simpleModule.addSerializer(Long.class, ToStringSerializer.instance);simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance);objectMapper.registerModule(simpleModule);objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);jackson2HttpMessageConverter.setObjectMapper(objectMapper);// 放到第一个converters.add(0, jackson2HttpMessageConverter);}}

二、简单，增加注解

在定义LocalDateTime类型的属性上添加两行注解

    @DateTimeFormat(pattern = "yyyy-MM-dd hh:mm:ss")                    // 表示返回时间类型@JsonFormat(pattern="yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")      // 表示接收时间类型@ApiModelProperty(value = "注册时间")private LocalDateTime date;