JQuery异步获取返回值中文乱码的解决方法

用jqgrid异步获取列表值，遇到个问题，服务器端从数据库取到的数据没有出现中文乱码问题（日志打出来是没有乱码的），但是异步传到客户的时候却出现了乱码。 服务器端已经编码过了（UTF-8编码）。开始一直怀疑是客户端的问题，比如客户端和服务器端编码不一致啊，也怀疑是不是jqgrid工具函数中少配了 contentType: "application/x-www-form-urlencoded; charset=utf-8",等等问题。

结果都不是，纠结了几个小时，后来经过大牛的提醒发现，原来代码还是出在服务器端，疏忽了。

rush:csharp;"> @RequestMapping(value = "/searchUserList.form") @ResponseBody public void searchUserList(int page,int rows,HttpServletRequest request,HttpServletResponse response) throws IOException{ System.out.println("idcard="+idCard+"\n page="+page+"\n rows="+rows);

List<User> list = userService.findByIDCard(idCard);

int totalRecord = list.size();
int totalPage = totalRecord<a href="https://www.jb51.cc/tag/r/" target="_blank" class="keywords">%r</a>ows == 0 ? totalRecord/rows : (totalRecord/rows+1);

int index = (page-1)*rows;
int pageSize = rows;

String json = "{\"total\": \""+totalPage+"\",\"page\": \""+page+"\",\"records\": \""+totalRecord+"\",\"rows\": ["; 
for (int i = index; i < pageSize + index && i<totalRecord; i++) { 
  User u = list.get(i);
  json += "{\"id\":\"" + u.getUserId() + "\",\"userName\":\""+u.getUserName()+"\",\"idCard\":\""+
  u.getIdCard() +"\",\"userTel\":\""+u.getUserTel()+"\",\"userSex\":\""+u.getUserSex()+
  "\",\"bankCard\":\""+u.getBankCard()+"\",\"cardStatus\":\""+u.getCardSatus()+"\",\"createTime\":\""+
  u.getCreateTime()+"\"}";
  if (i != pageSize + index - 1 && i != totalRecord - 1) { 
    json += ","; 
  } 
} 
json += "]}";
request.setCh<a href="https://www.jb51.cc/tag/ara/" target="_blank" class="keywords">ara</a>cterEncoding("utf-8"); //这里不设置编码会有乱码
response.setContentType("text/html;charset=utf-8");
response.setHeader("Cache-Control","no-cache"); 
PrintWriter out = response.getWriter(); //<a href="https://www.jb51.cc/tag/shuchu/" target="_blank" class="keywords">输出</a><a href="https://www.jb51.cc/tag/zhongwen/" target="_blank" class="keywords">中文</a>，这一句一定要放到response.setContentType("text/html;charset=utf-8"),response.setHeader("Cache-Control","no-cache")后面，否则<a href="https://www.jb51.cc/tag/zhongwen/" target="_blank" class="keywords">中文</a>返回到<a href="https://www.jb51.cc/tag/yemian/" target="_blank" class="keywords">页面</a>是乱码 
out.print(json.toString());
out.flush();
out.close();

}