MainActivity.java
1 package com.example.webserver;
2
3 import java.io.ByteArrayOutputStream;
4 import java.io.InputStream;
5 import java.io.OutputStream;
6 import java.net.HttpURLConnection;
7 import java.net.URL;
8 import java.net.URLEncoder;
9
10 import android.app.Activity;
11 import android.os.Bundle;
12 import android.text.TextUtils;
13 import android.view.View;
14 import android.view.View.OnClickListener;
15 import android.widget.Button;
16 import android.widget.EditText;
17 import android.widget.TextView;
18 import android.widget.Toast;
19
20 public class MainActivity extends Activity implements OnClickListener{
21 // 声明控件对象
22 private EditText et_name, et_pass;
23 // 声明显示返回数据库的控件对象
24 private TextView tv_result;
25 private Button login;
26 @Override
27 protected void onCreate(Bundle savedInstanceState) {
28 super.onCreate(savedInstanceState);
29 // 设置显示的视图
30 setContentView(R.layout.main);
31 // 通过 findViewById(id)方法获取用户名的控件对象
32 et_name = (EditText) findViewById(R.id.username);
33 // 通过 findViewById(id)方法获取用户密码的控件对象
34 et_pass = (EditText) findViewById(R.id.password);
35 login=(Button) findViewById(R.id.ok);
36 // 通过 findViewById(id)方法获取显示返回数据的控件对象
37 tv_result = (TextView) findViewById(R.id.backdata);
38 login.setOnClickListener(this);
39 }
40
41 /**
42 * 通过android:onClick="login"指定的方法 ， 要求这个方法中接受你点击控件对象的参数v
43 *
44 * @param v
45 */
46 /* public void login(View v) {
47
48
49 }
50 */
51 /**
52 * POST请求操作
53 *
54 * @param userName
55 * @param userPass
56 */
57 public void loginByPost(String userName, String userPass) {
58 try {
59 // 请求的地址
60 String spec = "http://10.28.197.117:8080/test/LoginServlet";
61 // 根据地址创建URL对象
62 URL url = new URL(spec);
63 // 根据URL对象打开链接
64 HttpURLConnection urlConnection = (HttpURLConnection) url
65 .openConnection();
66 // 设置请求的方式
67 urlConnection.setRequestMethod("POST");
68 // 设置请求的超时时间
69 urlConnection.setReadTimeout(5000);
70 urlConnection.setConnectTimeout(5000);
71 // 传递的数据
72 String data = "username=" + URLEncoder.encode(userName, "UTF-8")
73 + "&userpass=" + URLEncoder.encode(userPass, "UTF-8");
74 // 设置请求的头
75 urlConnection.setRequestProperty("Connection", "keep-alive");
76 // 设置请求的头
77 urlConnection.setRequestProperty("Content-Type",
78 "application/x-www-form-urlencoded");
79 // 设置请求的头
80 urlConnection.setRequestProperty("Content-Length",
81 String.valueOf(data.getBytes().length));
82 // 设置请求的头
83 urlConnection
84 .setRequestProperty("User-Agent",
85 "mozilla/5.0 (windows nt 6.1; win64; x64) applewebkit/537.36 (khtml, like gecko) chrome/55.0.2883.87 safari/537.36");
86
87 urlConnection.setDoOutput(true); // 发送POST请求必须设置允许输出
88 urlConnection.setDoInput(true); // 发送POST请求必须设置允许输入
89 //setDoInput的默认值就是true
90 //获取输出流
91 OutputStream os = urlConnection.getOutputStream();
92 os.write(data.getBytes());
93 os.flush();
94 if (urlConnection.getResponseCode() == 200) {
95 // 获取响应的输入流对象
96 InputStream is = urlConnection.getInputStream();
97 // 创建字节输出流对象
98 ByteArrayOutputStream baos = new ByteArrayOutputStream();
99 // 定义读取的长度
100 int len = 0;
101 // 定义缓冲区
102 byte buffer[] = new byte[1024];
103 // 按照缓冲区的大小，循环读取
104 while ((len = is.read(buffer)) != -1) {
105 // 根据读取的长度写入到os对象中
106 baos.write(buffer, 0, len);
107 }
108 // 释放资源
109 is.close();
110 baos.close();
111 // 返回字符串
112 final String result = new String(baos.toByteArray());
113
114 // 通过runOnUiThread方法进行修改主线程的控件内容
115 MainActivity.this.runOnUiThread(new Runnable() {
116 @Override
117 public void run() {
118 // 在这里把返回的数据写在控件上 会出现什么情况尼
119 tv_result.setText(result);
120 }
121 });
122
123 } else {
124 System.out.println("链接失败.........");
125 }
126 } catch (Exception e) {
127 e.printStackTrace();
128 }
129 }
130
131 @Override
132 public void onClick(View v) {
133 // TODO Auto-generated method stub
134 // 获取点击控件的id
135 int id = v.getId();
136 // 根据id进行判断进行怎么样的处理
137 switch (id) {
138 // 登陆事件的处理
139 case R.id.ok:
140 // 获取用户名
141 final String userName = et_name.getText().toString();
142 // 获取用户密码
143 final String userPass = et_pass.getText().toString();
144 if (TextUtils.isEmpty(userName) || TextUtils.isEmpty(userPass)) {
145 Toast.makeText(this, "用户名或者密码不能为空", Toast.LENGTH_LONG).show();
146 } else {
147 // 开启子线程
148 System.out.println("发送到服务器");
149 new Thread() {
150 public void run() {
151 loginByPost(userName, userPass); // 调用loginByPost方法
152 };
153 }.start();
154 }
155 break;
156 }
157
158 }
159
160 }
LoginServlet.java
1 package test;
2 import java.io.IOException;
3 import javax.servlet.ServletException;
4 import javax.servlet.http.HttpServlet;
5 import javax.servlet.http.HttpServletRequest;
6 import javax.servlet.http.HttpServletResponse;
7
8 public class LoginServlet extends HttpServlet {
9
10 /**
11 * cvcjh11
12 */
13 private static final long serialVersionUID = 1L;
14
15 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
16 //获取请求的参数值
17 String userName = request.getParameter("username");
18 String userPass = request.getParameter("userpass");
19
20 System.out.println("在没有转码之前的"+userName+"---"+userPass);
21 //GET方式的请求乱码处理
22 userName = new String(userName.getBytes("ISO8859-1"),"UTF-8");
23 userPass = new String(userPass.getBytes("ISO8859-1"),"UTF-8");
24
25 System.out.println("在转码之后---"+userName+"---"+userPass);
26 if("111".equals(userName)&&"111".equals(userPass)){
27 //响应登陆成功的信息
28 response.getOutputStream().write("ok".getBytes());
29 }else{
30 //相应登陆失败的信息
31 response.getOutputStream().write("fail".getBytes());
32 }
33
34 }
35
36 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
37 this.doGet(request, response);
38 }
39
40 }
web.xml
1 <?xml version="1.0" encoding="UTF-8"?> 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> 3 <display-name>test</display-name> 4 <servlet> 5 <description></description> 6 <display-name>LoginServlet</display-name> 7 <servlet-name>LoginServlet</servlet-name> 8 <servlet-class>test.LoginServlet</servlet-class> 9 </servlet> 10 11 <servlet-mapping> 12 <servlet-name>LoginServlet</servlet-name> 13 <url-pattern>/LoginServlet</url-pattern> 14 </servlet-mapping> 15 </web-app>
Androidmanifest.xml
1 <?xml version="1.0" encoding="utf-8"?> 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android" 3 package="com.example.webserver" 4 android:versionCode="1" 5 android:versionName="1.0" > 6 7 <uses-sdk 8 android:minSdkVersion="18" 9 android:targetSdkVersion="23" /> 10 11 <application 12 android:allowBackup="true" 13 android:icon="@drawable/ic_launcher" 14 android:label="@string/app_name" 15 android:theme="@style/AppTheme" > 16 <activity 17 android:name=".MainActivity" 18 android:label="@string/app_name" > 19 <intent-filter> 20 <action android:name="android.intent.action.MAIN" /> 21 <category android:name="android.intent.category.LAUNCHER" /> 22 </intent-filter> 23 </activity> 24 </application> 25 <uses-permission android:name="android.permission.INTERNET"/> 26 </manifest>
时间： 2024-10-18 18:38:48