Json+struts2

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>

<?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>

<?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;
}
}

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;
 }

}

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">
 <!--
 <link rel="stylesheet" type="text/css" href="styles.css">
 -->
 </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

<%@ 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"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </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;
 }


}

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();
 }

 }
}

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