引用：http://www.eoeandroid.com/forum.php?mod=viewthread&tid=69596
首先在服务器端，星空采用的是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 星空 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eoe的朋友们拍砖~~
首先，在服务器端搭建好SSH框架，具体细节就不在陈述~struts xml配置如下：
Java代码：
- <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：
Java代码：
- 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：
Java代码：
- 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，在这里星空只是模拟登陆使用的一个类，仅供大家参考：
Java代码：
- 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：
Java代码：
- 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，仅贴一个判断登陆的代码：
Java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();
- }
- }
