android集合SSH搭建服务器客户端请求

小弟以前是学的J2EE,由于项目需要要开发android,所以临时补了一个多星期,主要是手机端和服务器端交互,双向开发的。

首先在服务器端,我采用的是SSH框架,struts2集合了json插件,服务器和客户端的信息交互采用的JSON来传输,由于在服务器端用了Struts2,所以我就用装了一个JSON插件,这样,很轻易的就把服务器端的信息用JSON的形式发送到了手机端~~以下是代码,欢迎拍砖~~

首先,在服务器端搭建好SSH框架,具体细节就不在陈述~strutsxml配置如下:

<package name="login" extends="json-default">
	    <action name="login" class="com.jclick.test.LoginAction" method="login">
	       <result type="json"><paramname="includeProperties">result</param></result>
	    </action>
	</package>

手机端的代码如下:

首先,手机端有一个缓存类,主要用于缓存一些手机端需要访问的数据,这样的好处是可以达达节省手机和服务器的交互,用单例实现的:

package com.jclick.cache;

import com.jclick.bean.User;

public class Cache {
	
	private User User;
	
	private Cache(){
		
	}
	/** 构造单例 */
	private static class CacheHolder{
		private static final Cache INSTANCE = new Cache();
	}
	public Cache getInstance(){
		return CacheHolder.INSTANCE;
	}
	public User getUser() {
		return User;
	}
	public void setUser(User User) {
		this.User = User;
	}

}

接着开始书写手机端的协议,用户向服务器发送请求,同时服务器反馈给手机端信息的:

package com.jclick.protocol;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONException;
import org.json.JSONObject;

public class BaseProtocol {
	private StringBuilder sb = new StringBuilder();

	private HttpClient httpClient;
	private HttpPost httpRequest;
	private HttpResponse response;

	private List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>();

	BaseProtocol() {
		httpClient = new DefaultHttpClient();
	}

	/**
	 * 向服务器端发送请求
	 * 
	 * @param url
	 * @throws Exception
	 */
	protected void pack(String url) throws Exception {
		httpClient = new DefaultHttpClient();
		httpRequest = new HttpPost(url);

		httpRequest.setEntity(new UrlEncodedFormEntity(nameValuePair));
		response = httpClient.execute(httpRequest);
	}

	/**
	 * 得到返回数据
	 * 
	 * @param url
	 * @return
	 * @throws Exception
	 */
	protected void parse() throws Exception {
		// TODO 状态处理 500 200
		if (response.getStatusLine().getStatusCode() == 200) {

			BufferedReader bufferedReader2 = new BufferedReader(
					new InputStreamReader(response.getEntity().getContent()));
			for (String s = bufferedReader2.readLine(); s != null; s = bufferedReader2
					.readLine()) {
				sb.append(s);
			}
		}
	}

	/**
	 * 向服务器发送信息
	 * 
	 * @param key
	 * @param value
	 */
	public void addNameValuePair(String key, String value) {
		nameValuePair.add(new BasicNameValuePair(key, value));
	}

	/**
	 * 返回JSONObject对象数据模型
	 * 
	 * @return
	 * @throws JSONException
	 */
	public JSONObject getJSON() throws JSONException {
		return new JSONObject(sb.toString());
	}

}

接着是登陆协议,在这里我只是模拟登陆使用的一个类,仅供大家参考:

package com.jclick.protocol;

import org.json.JSONObject;

import com.jclick.bean.User;

public class LoginProtocol extends BaseProtocol{
	
	private final static String URL = "http://localhost:8080/test/login";
	
	public boolean checkLogin(User usr){
		try {
			pack(URL);
			parse();
			JSONObject obj = this.getJSON();
			if(obj.getString("result").equals("failed")){
				return false;
			}else{
				return true;
			}
		} catch (Exception e) {
			e.printStackTrace();
			return false;
		}
	}

}

然后是User实体类,主要用于保存用户信息:

package com.jclick.bean;

public class User {
	private String username;
	private String password;
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}

}

最后就是LoginActivity里边判断登陆的代码了,详细代码不再贴出来了,仅贴一个判断登陆的代码:

private void checkedData(){
			username = ((EditText)findViewById(R.id.username)).getText().toString();
			password = ((EditText)findViewById(R.id.password)).getText().toString();
			 
			User user = new User();
			user.setUsername(username);
			user.setPassword(password);
			LoginProtocol login = new LoginProtocol();
			boolean result = login.checkLogin(user);
			
			if(result){ 				SpiderCache.getInstance().setUserSession(user);
				Toast.makeText(getApplicationContext(), "登录成功", 1000).show();
				Intent intent = new Intent ();
				intent.setClass(LoginActivity.this,WelcomeActivity.class);
				startActivity(intent);
			}else{ 				Toast.makeText(LoginActivity.this,"密码或用户名不匹配,请重新输入!",1000).show();
			}
		}

以上代码为了跟大家分享一下,感觉手机端和服务器双向开发非常爽~~同时对android的兴趣大大提升,它也没有我想象中的那么难~~~

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