SSH+Android之Struts -

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SSH+Android之Struts

使用json数据交互信息

首先搭配SSH服务端，目前只用了Struts2,首先导入包，下面是需要的包

web.xml的代码

<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>
struts.xml代码

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd"> <struts> <package name="as" extends="json-default"> <action name="login" class="as.action.LoginAction" method="login"> <result type="json" ></result> </action> </package> </struts>
项目的结构

LoginAction.java代码

package as.action; import java.util.HashMap; import java.util.Map; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts2.interceptor.ServletRequestAware; import org.apache.struts2.interceptor.ServletResponseAware; import net.sf.json.JSONObject; import as.model.User; import com.opensymphony.xwork2.ActionSupport; import com.opensymphony.xwork2.ModelDriven; public class LoginAction extends ActionSupport implements ServletResponseAware ,ServletRequestAware,ModelDriven<User>{ private User user; private HttpServletResponse response; private HttpServletRequest request; public User getUser() { return user; } public void setUser(User user) { this.user = user; } public void setServletResponse(HttpServletResponse arg0) { // TODO Auto-generated method stub this.response = arg0; } public void setServletRequest(HttpServletRequest arg0) { // TODO Auto-generated method stub this.request=arg0; } public void login() { try { // TODO Auto-generated method stub this.response.setContentType("text/html;charset=utf-8"); this.response.setCharacterEncoding("UTF-8"); JSONObject json=new JSONObject(); Map map=new HashMap<Object, String>(); map.put("name", user.getName()); map.put("pwd", user.getPwd()); json.put("LoginInfo", map); response.getWriter().write(json.toString()); } catch (Exception e) { // TODO: handle exception e.printStackTrace(); } } public User getModel() { // TODO Auto-generated method stub if (user==null) { return user=new User(); } return user; } }
User.java

package as.model; public class User { private String name; private String pwd; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPwd() { return pwd; } public void setPwd(String pwd) { this.pwd = pwd; } }
view层 index.jsp 代码

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page">  </head> <body> <center> <form action="login" method="post"> 用户名: <input type="text" name="name"><br> 密码: <input type="password" name="pwd"><br> <input type="submit" value="登陆" name="submit"><input type="reset" value="取消" name="reset"> </form> </center> </body> </html> 测试用户名:2222 密码：1111

现在在android上面测试，Android 项目构架

由于是post 请求，这里就给出Android post 请求的代码

UrlServiceImpl.java

111.122.31.54 是本机的IP地址

package dlnu.message.serviceimpl; import java.io.IOException; import java.util.ArrayList; import java.util.List; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.ClientProtocolException; 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.apache.http.params.CoreConnectionPNames; import org.apache.http.protocol.HTTP; import org.apache.http.util.EntityUtils; import dlnu.message.service.UrlService; public class UrlServiceImpl implements UrlService{ @Override public String Login(String name, String pwd) { // TODO Auto-generated method stub String uriAPI = "http://111.122.31.54:8080/AndroidService/login.action"; /*建立HTTPost对象*/ HttpPost httpRequest = new HttpPost(uriAPI); HttpClient client=new DefaultHttpClient(); /* * NameValuePair实现请求参数的封装 */ //System.out.println("--------"+name+"-----------"+pwd); List <NameValuePair> params = new ArrayList <NameValuePair>(2); params.add(new BasicNameValuePair("name", name));//返回JSon数据如果是xml 返回的就是XML数据 params.add(new BasicNameValuePair("pwd", pwd)); String strResult=null; try { /* 添加请求参数到请求对象*/ httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8)); /* 处理超时*/ client.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 10000); /*发送请求并等待响应*/ HttpResponse httpResponse = client.execute(httpRequest); /*若状态码为200 ok*/ if(httpResponse.getStatusLine().getStatusCode() == 200) { /*读返回数据去掉两头不要的参数*/ strResult= EntityUtils.toString(httpResponse.getEntity()); } else { System.err.println("Error Response: "+httpResponse.getStatusLine().toString()); strResult=null; } } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } return strResult; } }
Activity ShowMessageMainActivity.java

package dlnu.message.activity; import dlnu.message.model.User; import dlnu.message.service.UserService; import dlnu.message.serviceimpl.JsonServiceImpl; import dlnu.message.serviceimpl.UserServiceImpl; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class ShowMessageMainActivity extends Activity { /** Called when the activity is first created. */ private EditText namEditText; private EditText pwdEditText; private Button submitButton; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.showmessageactivity); namEditText=(EditText) findViewById(R.id.nameditText1); pwdEditText=(EditText) findViewById(R.id.pwdseditText2); submitButton=(Button) findViewById(R.id.submitbutton1); submitButton.setOnClickListener(new ButtonListener()); } class ButtonListener implements OnClickListener{ @Override public void onClick(View v) { // TODO Auto-generated method stub String name=namEditText.getText().toString().trim(); String pwd=pwdEditText.getText().toString().trim(); UserService userService=new UserServiceImpl(); JsonServiceImpl service=new JsonServiceImpl(); String string=userService.UserLogin(name, pwd); User user=new User(); user=service.UserLoginJsonAnalysis(string); Toast.makeText(ShowMessageMainActivity.this, user.getName()+" "+user.getPwd(), 8000).show(); } } }
效果