Json转换工具类

package com.csdn.myboot.utils;import com.fasterxml.jackson.core.JsonProcessingException;import com.fasterxml.jackson.databind.JavaType;import com.fasterxml.jackson.databind.ObjectMapper;import java.util.List;/** * @Title: JsonUtils.java * @Package com.lee.utils * @Description: 自定义响应结构, 转换类 * Copyright: Copyright (c) 2016 * Company:Nathan.Lee.Salvatore * @author leechenxiang * @date 2016年4月29日 下午11:05:03 * @version V1.0 **/public class JsonUtils {  // 定义jackson对象  private static final ObjectMapper MAPPER = new ObjectMapper();  /**   * 将对象转换成json字符串。   * <p>Title: pojoToJson</p>   * <p>Description: </p>   * @param data   * @return   **/  public static String objectToJson(Object data) {   try {  String string = MAPPER.writeValueAsString(data);  return string; } catch (JsonProcessingException e) {  e.printStackTrace(); }   return null;  }  /**   * 将json结果集转化为对象   * @param jsonData json数据   * @param clazz 对象中的object类型   * @return   **/  public static <T> T jsonToPojo(String jsonData, Class<T> beanType) {    try {      T t = MAPPER.readValue(jsonData, beanType);      return t;    } catch (Exception e) {     e.printStackTrace();    }    return null;  }  /**   * 将json数据转换成pojo对象list   * <p>Title: jsonToList</p>   * <p>Description: </p>   * @param jsonData   * @param beanType   * @return   **/  public static <T>List<T> jsonToList(String jsonData, Class<T> beanType) {   JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List.class, beanType);   try {   List<T> list = MAPPER.readValue(jsonData, javaType);   return list; } catch (Exception e) {  e.printStackTrace(); }   return null;  }}

@ResponseBody  @RequestMapping("/hello")  public String hello(){    UserDomain user7 = new UserDomain();    user7.setUserId(7);    user7.setUserName("Cristiano Ronaldo");    user7.setPassword("abc123");    user7.setPhone("13900000000");    String cr7 = JsonUtils.objectToJson(user7);    String c = "{/"userId/":7,/"userName/":/"Cristiano Ronaldo/",/"password/":/"abc123/",/"phone/":/"13900000000/"}";    UserDomain u = JsonUtils.jsonToPojo(c, UserDomain.class);    System.out.println(u.toString());    String listc = "[ "+c+" ]";    List<UserDomain> list = JsonUtils.jsonToList(listc,UserDomain.class);    System.out.println(list);    return cr7;  }