JSON工具类

package com.liu.utils;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;

import java.text.SimpleDateFormat;

public class JsonUtils {
    

    //传一个参数
    public static String getJson(Object object){
    
        return getJson(object,"yyyy-MM-dd HH:mm:ss");
    }

    //传两个参数
    public static String getJson(Object object,String dateFormat){
    

        ObjectMapper mapper = new ObjectMapper();
        //关闭时间戳的方式
        mapper.configure(SerializationFeature.WRITE_DATE_KEYS_AS_TIMESTAMPS,false);

        SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
        mapper.setDateFormat(sdf);

        try {
    
            return mapper.writeValueAsString(object);
        } catch (JsonProcessingException e) {
    
            e.printStackTrace();
        }
        return null;
    }
}

测试

@RestController//不会走视图解析器
public class UserController {
    

@RequestMapping("/j1")
public String json1(){
    
    //创建一个对象
    User user = new User("刘想",3,"男");
    return JsonUtils.getJson(user); 
}    

结果

配置好tomcat，输入url测试

url：(http://localhost:8080/springmvc_05_json_war_exploded/j1)

结果：