Java中使用json与前台Ajax数据交互的方法

本文主要为大家分享了ajax获取显示json数据的一种方法，供大家参考，具体内容如下 
 1、首先前台用ajax，其中注意datatype一定要选择json方式，action成功返回给页面的json内容是这样的[{"number":"v006","names":"lilei"}],可见comment['names']对应"names":"lilei"，comment['number']对应"number":"v006"。

$.ajax({
  type: "post",
   url:'apply/mystudent.action?',
  cache: false,
  datatype : "json",
  success: function(data){
   
   $.each(data, function(commentindex, comment){
         
            alert("姓名"+ comment['names']);
        
            alert("学号"+comment['number']);

         });
                 }
                }); 

2、ajax的url指向在java的action中mystudent方法，返回的list其实是一个对象student，包括了names和nunmber字段

public string mystudent() throws exception{
 list list=priceservice.query();//调用接口实现类
 
 this.jsonutil(list);
 
 return null;
 }

3、action页面专门写一个方法jsonutil来做为json方法 

 // 调用json工具方法，传入参数alist
 public void jsonutil(object accountlist) throws exception {
 httpservletresponse response = servletactioncontext.getresponse();
 log.info("json格式：" + accountlist.tostring());

 string returnjson = jsonconvert.returnjson(accountlist);
 response.setcharacterencoding("utf-8");
 response.getwriter().println(returnjson);
 }

4、我用的是一种比较新的json包jackson

import java.io.stringwriter;

import org.codehaus.jackson.map.objectmapper;

public class jsonconvert {
 static string jsonstr;
 public static string returnjson(object object) throws exception{
 objectmapper objectmapper = new objectmapper();
 stringwriter stringwriter = new stringwriter();
 objectmapper.writevalue(stringwriter, object);
 
 jsonstr = stringwriter.tostring();
 return jsonstr;
 }
}

以上就是本文的全部内容，希望对大家的学习有所帮助。