Android手机客户端通过JSP实现与Tomcat服务器端通信（Msql数据库，Json作为载体）
--服务端代码
服务器端主要代码：
1.首先构建一个Person类，用来保存用户信息
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public class Person
private String name;
private String address;
private Integer age;
public Person() {
super();
}
public Person(String name, String address, Integer age) {
super();
this.name = name;
this.address = address;
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
}
2.服务器端的service类
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import java.io.PrintWriter;
import java.sql.*;
import java.util.*;
public class JsonService {
public static List<Person> getListPerson(){
String a,b,allString = "";
int c = 0;
List<Person> mLists = new ArrayList<Person>();
// List<Person> mLists = new ArrayList<Person>();
// mLists.add(new Person("临风", "北京", 20));
System.out.println(mLists);
try {
Class.forName("com.mysql.jdbc.Driver");//链接数据库
Connection conn = DriverManager.getConnection(
"jdbc:mysql://127.0.0.1:3306/json", "root" , "123456");
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("select * from people");//遍历数据库
Person p = null;
while(rs.next())
{
System.out.println(rs.getString(1) + "\t"
+ rs.getString(2) + "\t"
+ rs.getInt(3));
a = rs.getString(1);
b = rs.getString(2);
c = rs.getInt(3);
mLists.add(new Person(a, b, c));//添加到List中
}
System.out.println(mLists);
}catch(Exception e){
System.out.println(e);
e.printStackTrace();
return mLists;
}
// finally{
// return mLists;
// }
System.out.println(mLists);
return mLists;
}
//测试用主函数
public static void main(String[] args) throws Exception
{
String str[] = null;
JsonService con = new JsonService();
List<Person> temp = con.getListPerson();
// System.out.println(temp.);
// str = temp.split(" ");
// for(int i = 0 ; i < str.length ; i++){
// System.out.println(str[i]);
// }
// System.out.println(str.length);
}
}
3.服务器端servlet类，接受android端的请求，并且将List中的Person数据转换为Json的格式，实现Json的数据传输
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import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.jiangqq.bean.Person;
import com.jiangqq.csdn.JsonService;
public class JsonServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
try{
PrintWriter out = response.getWriter();
List<Person> persons = JsonService.getListPerson();//返回JsonService的数据
StringBuffer sb = new StringBuffer();//数据缓存
sb.append('[');
for (Person person : persons) {//person.getName(),person.getAddress()获得姓名，地址，一些符号转换为char
//锁定输出=> {"name":"姓名","address":"地址","age":年龄},
sb.append('{').append(""name":").append("""+person.getName()+""").append(",");
sb.append(""address":").append("""+person.getAddress()+""").append(",");
sb.append(""age":").append(person.getAge());
sb.append('}').append(",");
}
sb.deleteCharAt(sb.length() - 1);
sb.append(']');
out.write(new String(sb));
out.flush();
out.close();//关闭
}catch(Exception e){
System.out.println(e);
e.printStackTrace();
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}
环境搭建：
1.在Tomcat 7.0\webapps\JsonWeb\WEB-INF\lib 目录中加入了mysql-connector-java-5.0.8-bin.jar以及servlet-api.jar
2.然后在主目Tomcat 7.0\webapps\JsonWeb录的index.jsp中加入引用包的代码
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<%@ page import="java.util.*"%>
<%@ page import="java.sql.*"%>
结果测试：在浏览器输入http://localhost:8080/JsonWeb/JsonServlet，返回格式化好的json数据
--客户端代码
1.客户端文件，JsonParse，Json文件解析
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import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONObject;
import com.jiangqq.bean.Person;
public class JsonParse {
/**
* 解析Json数据
*
* @param urlPath
* @return mlists
* @throws Exception
*/
public static List<Person> getListPerson(String urlPath) throws Exception {
List<Person> mlists = new ArrayList<Person>();
byte[] data = readParse(urlPath);
JSONArray array = new JSONArray(new String(data));
for (int i = 0; i < array.length(); i++) {
JSONObject item = array.getJSONObject(i);
String name = item.getString("name");
String address = item.getString("address");
int age = item.getInt("age");
mlists.add(new Person(name, address, age));
}
return mlists;
}
/**
* 从指定的url中获取字节数组
*
* @param urlPath
* @return 字节数组
* @throws Exception
*/
public static byte[] readParse(String urlPath) throws Exception {
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte[] data = new byte[1024];
int len = 0;
URL url = new URL(urlPath);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
InputStream inStream = conn.getInputStream();
while ((len = inStream.read(data)) != -1) {
outStream.write(data, 0, len);
}
inStream.close();
return outStream.toByteArray();
}
}
2.客户端主要类，MainActivity，发送请求
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import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import com.jiangqq.bean.Person;
import com.jiangqq.util.JsonParse;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
public class MainActivity extends Activity {
private Button mButton;
private ListView mListView;
private static final String urlPath = "http://192.168.1.100:8080/JsonWeb/JsonServlet";
private static final String TAG = "MainActivity";
private List<Person> persons;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mButton = (Button) findViewById(R.id.button1);
mListView = (ListView) findViewById(R.id.listView1);
mButton.setOnClickListener(new MyOnClickListener());
}
private class MyOnClickListener implements OnClickListener {
@Override
public void onClick(View v) {
try {
// 得到Json解析成功之后数据
persons = JsonParse.getListPerson(urlPath);
List<HashMap<String, Object>> data = new ArrayList<HashMap<String, Object>>();
for (int i = 0; i < persons.size(); i++) {
HashMap<String, Object> map = new HashMap<String, Object>();
map.put("name", persons.get(i).getName());
map.put("address", persons.get(i).getAddress());
map.put("age", persons.get(i).getAge());
data.add(map);
}
SimpleAdapter _Adapter = new SimpleAdapter(MainActivity.this,
data, R.layout.listview_item, new String[] { "name",
"address", "age" }, new int[] { R.id.textView1,
R.id.textView2, R.id.textView3 });
mListView.setAdapter(_Adapter);
} catch (Exception e) {
Toast.makeText(MainActivity.this, "解析失败", 2000);//在手机上显示提示Toast，2秒
Log.i(TAG, e.toString());//DDMS中显示提示
}
}
}
}
3.同上一篇的，Person构造的数据类
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package com.jiangqq.bean;
public class Person {
private String name;
private String address;
private Integer age;
public Person() {
super();
}
public Person(String name, String address, Integer age) {
super();
this.name = name;
this.address = address;
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
@Override
public String toString() {
return "Person [name=" + name + ", address=" + address + ", age=" + age
+ "]";
}
}
4.AndroidManifest.xml别忘记添加
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<uses-permission android:name="android.permission.INTERNET" />
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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.jiangqq.csdn"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="8" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.INTERNET" />
</manifest>
