Tomcat 上如何部署Servlet及Android中如何与服务器通信
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I add this English description due to junk baidu wenku`s rules
Eclipse中编写Servlet代码：创建java工程
package com.webservice.test;
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 net.sf.json.JSONArray;
import net.sf.json.JSONObject;
public class WebserviceTest extends HttpServlet {
private static final long serialVersionUID = 512;
private List
protected void doPost(HttpServletRequest req,HttpServletResponse response) throws ServletException,IOException{
doGet(req, response);
}
protected void doGet(HttpServletRequest req,HttpServletResponse response) throws ServletException,IOException{
response.setContentType("test/plain");
response.setCharacterEncoding("UTF-8");
PrintWriter outPrintWriter = response.getWriter();
JSONArray jsonArray = new JSONArray();
list = initData();
for(Student bean:list) {
JSONObject jsonObject = new JSONObject();
try{
jsonObject.put("stunum", bean.getStunum());
jsonObject.put("name",bean.getName());
jsonObject.put("chinese", bean.getChinese());
jsonObject.put("math", bean.getMath());
jsonObject.put("english", bean.getEnglish());
}catch (Exception e) {
e.printStackTrace();
}
jsonArray.put(jsonObject);
}
outPrintWriter.write(jsonArray.toString());
outPrintWriter.flush();
outPrintWriter.close();
}
private List
List
Student stuOne = new Student();
stuOne.setStunum(10001);
stuOne.setName("sloden");
stuOne.setChinese(82);
stuOne.setMath(88);
stuOne.setEnglish(80);
studentlist.add(stuOne);
Student stuTwo = new Student();
stuTwo.setStunum(10002);
stuTwo.setName("candy");
stuTwo.setChinese(81);
stuTwo.setMath(87);
stuTwo.setEnglish(80);
studentlist.add(stuTwo);
Student stuThree = new Student();
stuThree.setStunum(10003);
stuThree.setName("tenny");
stuThree.setChinese(89);
stuThree.setMath(85);
stuThree.setEnglish(89);
studentlist.add(stuThree);
return studentlist;
}
/*public static void main(String[] args){
}*/
}
class Student{
private int stunum;
private String name;
private int chinese;
private int math;
private int english;
public int getStunum() {
return stunum;
}
public void setStunum(int stunum) {
this.stunum = stunum;
}
public String getName() {
return name;
}
public void setName(String name) {
https://www.doczj.com/doc/ab6300847.html, = name;
}
public int getChinese() {
return chinese;
}
public void setChinese(int chinese) {
this.chinese = chinese;
}
public int getMath() {
return math;
}
public void setMath(int math) {
this.math = math;
}
public int getEnglish() {
return english;
}
public void setEnglish(int english) {
this.english = english;
}
}
代码中用到了HttpServlet ，JSONArray ，JSONObject 类，需要导入jar包，HttpServlet可以从TomCat\lib\servlet-api.jar，JSONArray ，JSONObject 需要导入
json-lib-1.1-jdk13.jar包，eclipse中可以在项目名称上右键选择properties，现在java build path ,然后选择Libraries，点击Add External JARs,选择jar包
代码编写好后，在项目下面bin中会生成对应的class文件：
这些class文件最后都是要部署到Tomcat中去的，包括包名文件夹，比如：com/webservice/test 这些目录都是要拷贝进去的。
Tomcat中配置：
在Tomcat的webapp中新建工程文件夹，命名为“server-test”，然后在server-test中新建文件夹“WEB-INF”，在“WEB-INF”文件夹中新建文件夹“classes”,用于存放工程的class 文件。在在“WEB-INF”文件夹中新建文件web.xml，内容如下：
xmlns:xsi="https://www.doczj.com/doc/ab6300847.html,/2001/XMLSchema-instance" xsi:schemaLocation="https://www.doczj.com/doc/ab6300847.html,/xml/ns/javaee https://www.doczj.com/doc/ab6300847.html,/xml/ns/javaee/web-app_3_0.xsd" version="3.0" metadata-complete="true"> A scriptable management web application for the Tomcat Web Server; Manager lets you view, load/unload/etc particular web applications.
将编译生成的class 文件放到项目中的WEB-INF目录中的classes目录下，启动Tomcat：
然后在浏览器中输入：http://localhost:8080/server-test/test
如果出现如下问题：
出现这样的问题，需要再环境变量中导入jar包，在我做实验的过程中导入了如下几个包：commons-beanutils.jar、commons-logging.jar、ezmorph-1.0.2.jar、commons-lang-2.1.jar、
json-lib-1.1-jdk13.jar、servlet-api.jar,其中除了servlet-api.jar包外，其他jar包可以从网上下载，servlet-api.jar可以从Tomcat中lib文件夹中得到：
配置好后再浏览器中输入：http://localhost:8080/server-test/test，就好出现如下界面：
下载文件，用UltraEdit 打开，可以看到如下内容：
[{"math":88,"stunum":10001,"name":"sloden","english":80,"chinese":82},{"math":87,"stunum":1
0002,"name":"candy","english":80,"chinese":81},{"math":85,"stunum":10003,"name":"tenny","en
glish":89,"chinese":89}]
这个时候Tomcat中的项目就部署好了！
Android中客户端与服务端通信
Android代码如下：
package jiao.jiao;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import https://www.doczj.com/doc/ab6300847.html,ValuePair;
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.JSONArray;
import org.json.JSONObject;
import android.app.Activity;
import https://www.doczj.com/doc/ab6300847.html,.ConnectivityManager;
import https://www.doczj.com/doc/ab6300847.html,workInfo;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class WebClientForAndroidActivity extends Activity { /** Called when the activity is first created. */
public EditText showEditText,queryEditText;
public Button getButton;
public static final String TAG = "client";
public static final int CONNECTMESSAGE_SUCCESS = 10051;
public static final int CONNECTMESSAGE_ERROR = 10052;
public static final int CONNECTMESSAGE_TIMEOUT = 10053;
public StringBuilder stringBuilder;
public Handler handler;
public static final String httpUrl= "http://10.18.49.71:8080/server-test/test";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(https://www.doczj.com/doc/ab6300847.html,yout.main);
handler = new Handler(){
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
//super.handleMessage(msg);
if (msg.arg1 == CONNECTMESSAGE_SUCCESS) {
if (stringBuilder!=null) {
try {
String jsonString = stringBuilder.toString();
StringBuffer stringBuffer = new StringBuffer();
//JSONArray jsonArray = new JSONArray(jsonString);
JSONArray jsonArray = new JSONArray(jsonString);
//jsonArray.put(jsonString.toString());
//jsonArray.put(jsonString);
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
stringBuffer.append("---------the "+i+" student info-------");
stringBuffer.append("stunum:").append(jsonObject.getInt("stunum")).a ppend("\n");
stringBuffer.append("name:").append(jsonObject.getString("name")).ap pend("\n");
stringBuffer.append("math:").append(jsonObject.getInt("math")).appen d("\n");
stringBuffer.append("english:").append(jsonObject.getInt("english")) .append("\n");
stringBuffer.append("chinese:").append(jsonObject.getInt("chinese")) .append("\n");
}
showEditText.setText(stringBuffer.toString());
} catch (Exception e) {
e.printStackTrace();
}
}
}
if (msg.arg1 == CONNECTMESSAGE_ERROR) {
showEditText.setText("can not get info for service");
}
}
};
queryEditText = (EditText) this.findViewById(R.id.stunum);
showEditText = (EditText) this.findViewById(https://www.doczj.com/doc/ab6300847.html,);
getButton = (Button) this.findViewById(R.id.getinfo);
getButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
new Thread(){
@Override
public void run() {
// TODO Auto-generated method stub
connectService();
}
}.start();
}
});
if (checkNetWork()) {
Log.d(TAG, "---------------------network is ok");
}else {
getButton.setEnabled(false);
}
}
public boolean checkNetWork(){
ConnectivityManager cm = (ConnectivityManager) this
.getSystemService(this.CONNECTIVITY_SERVICE);
NetworkInfo info = cm.getActiveNetworkInfo();
if (info != null && info.isConnected()) {
return true;
} else {
Log.d(TAG, "It's can't connect the Internet!");
return false;
}
}
public void connectService(){
HttpPost request = new HttpPost(httpUrl);
HttpClient httpClient = new DefaultHttpClient();
List
params.add(new
BasicNameValuePair("stunum",queryEditText.getText().toString()));
HttpResponse response;
try {
HttpEntity entity = new UrlEncodedFormEntity(params, "UTF-8");
request.setEntity(entity);
response = httpClient.execute(request);
int status = response.getStatusLine().getStatusCode();
Log.d(TAG, "---------------status:"+status);
if(status==HttpStatus.SC_OK){
Log.d(TAG, "---------------connected success!!!");
entity = response.getEntity();
if(entity!=null){
BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent()));
stringBuilder = new StringBuilder();
String infoString =null;
while ((infoString=reader.readLine())!=null) {
stringBuilder= stringBuilder.append(infoString+"\n");
}
reader.close();
Message msgMessage = new Message();
msgMessage.arg1 = CONNECTMESSAGE_SUCCESS;
handler.sendMessage(msgMessage);
}
}else {
Message msgMessage = new Message();
showEditText.setText("connect error!!!");
msgMessage.arg1 = CONNECTMESSAGE_ERROR;
handler.sendMessage(msgMessage);
}
} catch (Exception e) {
e.printStackTrace();
Message msgMessage = new Message();
msgMessage.arg1 = CONNECTMESSAGE_ERROR;
handler.sendMessage(msgMessage);
}
}
}
AndroidManifest.xml文件如下：
package="jiao.jiao" android:versionCode="1" android:versionName="1.0"> android:name="android.permission.ACCESS_NETWORK_STATE"/> android:icon="@drawable/ic_launcher" android:label="@string/app_name"> android:name=".WebClientForAndroidActivity" android:label="@string/app_name">
效果如下：
如有问题可以加QQ five-one-five-eight-one-two-eight-one-one