java学习笔记(13) —— google GSON 实现json转化方法

1、配置struts.xml

        <action name="getGsonAction" class="com.test.action.json.GetGsonAction">
        </action>

2、添加js方法

getJson = function(){
    $.post("getGsonAction.action",{name:$('#name').val()},function(ret,status){
        if("success" == status){
            
        }
    });
}

3、添加jsp页面

<html>
  <head>
    <script type="text/javascript" src="js/jquery-1.8.2.js"></script>
    <script type="text/javascript" src="scripts/common.js"></script>
  </head>
  
  <body id="xmlbody">
      <select id="name">
          <option value="james" selected="selected">james</option>
          <option value="currey">currey</option>
      </select>
      <input type="button" value="getInfo" onclick="getJson();"/>
  </body>
</html>

4、bean文件

public class Address 
{
    private String homeAddress;
    private String companyAddress;
    
    public String getHomeAddress() {
        return homeAddress;
    }
    public void setHomeAddress(String homeAddress) {
        this.homeAddress = homeAddress;
    }
    public String getCompanyAddress() {
        return companyAddress;
    }
    public void setCompanyAddress(String companyAddress) {
        this.companyAddress = companyAddress;
    }
}



package com.test.action.json;

import java.util.List;

//9分钟
public class People 
{
    private int id;
    
    private String name;
    
    private Address address;
    
    private List<People> friends;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Address getAddress() {
        return address;
    }

    public void setAddress(Address address) {
        this.address = address;
    }

    public List<People> getFriends() {
        return friends;
    }

    public void setFriends(List<People> friends) {
        this.friends = friends;
    }
}

 

5、添加action类

public class GetGsonAction extends ActionSupport {

    private static final long serialVersionUID = 5409431608941107203L;

    public String execute() throws Exception {
        List<People> list = new ArrayList<People>();
        //第一个人的信息
        Address address1 = new Address();
        address1.setCompanyAddress("shanghai");
        address1.setHomeAddress("beijing");
        
        People people1 = new People();
        people1.setId(1);
        people1.setName("james");
        people1.setAddress(address1);
        
        People friend1 = new People();
        people1.setId(4);
        people1.setName("smith");
        
        People friend2 = new People();
        friend2.setId(5);
        friend2.setName("owen");
        
        List<People> list1 = new ArrayList<People>();
        list1.add(friend1);
        list1.add(friend2);
        
        people1.setFriends(list1);
        
        //第二个人的信息
        People people2 = new People();
        Address address2 = new Address();
        address2.setCompanyAddress("tianjin");
        address2.setHomeAddress("tanggu");
        
        people2.setId(2);
        people2.setName("currey");
        people2.setAddress(address2);
        
        List<People> list2 = new ArrayList<People>();
        People friend3 = new People();
        friend3.setId(7);
        friend3.setName("igdala");
        list2.add(friend3);
        
        People friend4 = new People();
        friend4.setId(8);
        friend4.setName("toms");
        list2.add(friend4);
        
        people2.setFriends(list2);
        
        list.add(people1);
        list.add(people2);
        
        Gson gson = new Gson();
        String result = gson.toJson(list);
        
        HttpServletResponse response = ServletActionContext.getResponse();
        response.setContentType("text/json; charset=utf-8");
        response.setHeader("Cache-Control", "no-cache");//取消浏览器缓存
        PrintWriter writer = response.getWriter();
        writer.write(result);
        writer.flush();
        writer.close();
        System.out.println(result);
        return null;
    }
}

 

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