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   源码介绍

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服务器端和android客户端程序都有


客户端核心代码:

 

package com.test;

import java.io.BufferedReader;
import java.io.InputStreamReader;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.json.JSONArray;
import org.json.JSONObject;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class MainActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        try{
        	StringBuffer sb=new StringBuffer();
        	String url="http://192.168.1.105:8080/JSONDemoServlet/JSONServlet";
        	String body=getContent(url);
        	System.out.println("body---" body);
        	JSONArray array=new JSONArray(body);
        	for (int i = 0; i < array.length(); i  ) {
				JSONObject obj=array.getJSONObject(i);
				sb.append("id:").append(obj.getInt("id")).append("\t");
				sb.append("name:").append(obj.getString("name")).append("\r\n");
				sb.append("gender:").append(obj.getString("gender")).append("\t");
				sb.append("email:").append(obj.getString("email")).append("\r\n");
				sb.append("------------------------\r\n");
			}
        	TextView textView=(TextView)findViewById(R.id.textView);
        	textView.setText(sb.toString());
        }catch (Exception e) {
			// TODO: handle exception
		}
    }
    
	private String getContent(String url) throws Exception{
    	StringBuilder sb=new StringBuilder();
    	HttpClient client=new DefaultHttpClient();
    	HttpParams httpParams=client.getParams();
    	
    	//设置网络超时参数
    	HttpConnectionParams.setConnectionTimeout(httpParams, 3000);
    	HttpConnectionParams.setSoTimeout(httpParams, 5000);
    	HttpResponse response=client.execute(new HttpGet(url));
    	HttpEntity entity=response.getEntity();
    	if (entity!=null) {
    		BufferedReader reader=new BufferedReader(new InputStreamReader(
    				entity.getContent(), "UTF-8"), 8192);
    		String line=null;
    		while ((line=reader.readLine())!=null) {
    			sb.append(line "\n");
			}
    		reader.close();
    		
		}
		return sb.toString();
    }
}

服务器端核心代码:

 

package com.test.Demo;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.json.me.JSONArray;
import org.json.me.JSONObject;

/**
 *JSONDemoServlet
 *com.test.Demo
 *JSONDemoServlet.java
 *@author WangYongfeng 
 *Apr 5, 2011 5:03:49 PM TODO 
 *
 */
public class JSONDemoServlet extends HttpServlet {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private List<User> list;
	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		// TODO Auto-generated method stub
		resp.setContentType("text/plain");
		resp.setCharacterEncoding("UTF-8");
		PrintWriter out=resp.getWriter();
		
		//准备用户数据
		prepareData();
		
		//JSON数组
		JSONArray array=new JSONArray();
		
		for(User bean:list){
			//单个用户JSON对象
			JSONObject obj=new JSONObject();
			try{
				obj.put("id", bean.getId());
				obj.put("name", bean.getName());
				obj.put("email", bean.getEmail());
				obj.put("gender", bean.getGender());
			}catch (Exception e) {
				// TODO: handle exception
			}
			array.put(obj);
		}
		//输出
		out.write(array.toString());
		out.flush();
		out.close();
	}

	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		// TODO Auto-generated method stub
		super.doGet(req, resp);
	}
	
	private void prepareData(){
		list = new ArrayList<User>();
        User bean1 = new User();
        bean1.setId(1001); 
        bean1.setName("Tony"); 
        bean1.setEmail("tony@toeach.net"); 
        bean1.setGender("male");  
        list.add(bean1); 
        
        User bean2 = new User();
        bean2.setId(1002);
        bean2.setName("Jack"); 
        bean2.setEmail("jack@hotmail.com");
        bean2.setGender("male");  
        list.add(bean2); 
        
        User bean3 = new User();
        bean3.setId(1003);   
        bean3.setName("Marry");
        bean3.setEmail("marry@163.com");
        bean3.setGender("female");
        list.add(bean3);
        
        User bean4 = new User();
        bean4.setId(1004); 
        bean4.setName("Linda");
        bean4.setEmail("linda@21cn.com");  
        bean4.setGender("female"); 
        list.add(bean4); 
	}
	
}