Android 开发。。。如何连接到服务器上的mysql数据库

1、首先输入代码

public void SendByHttpClient(final String id, final String pw){

new Thread(new Runnable() {

@Override

public void run() {

try {

HttpClient httpclient=new DefaultHttpClient()

HttpPost httpPost=new HttpPost("http://web应用部署服务器上的IP地址:/HttpClientDemo/Login")//服务器地址，指向Servlet

List<NameValuePair>params=new ArrayList<NameValuePair>()//将id和pw装入list

params.add(new BasicNameValuePair("ID",id))

params.add(new BasicNameValuePair("PW",pw))

final UrlEncodedFormEntity entity=new UrlEncodedFormEntity(params,"utf-8")//以UTF-8格式发送

httpPost.setEntity(entity)

HttpResponse httpResponse= httpclient.execute(httpPost)

if(httpResponse.getStatusLine().getStatusCode()==200)//在200毫秒之内接收到返回值

2、然后再输入下方的代码：

{

HttpEntity entity=httpResponse.getEntity()

String response=EntityUtils.toString(entity1, "utf-8")//以UTF-8格式解析

Message message=new Message()

message.what=USER_LOGIN

message.obj=response

handler.sendMessage(message)使用Message传递消息给线程

}

}

catch (Exception e) {

e.printStackTrace()

}

}

}).start()

  }

3、最终，测试结果图，如下：

android 链接mysql数据库实例：

package com.hl

import java.sql.DriverManager

import java.sql.ResultSet

import com.mysql.jdbc.Connection

import com.mysql.jdbc.Statement

import android.app.Activity

import android.os.Bundle

import android.view.View

import android.view.View.OnClickListener

import android.widget.Button

import android.widget.TextView

public class AndroidMsql extends Activity {

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState)

setContentView(R.layout.main)

Button btn=(Button)findViewById(R.id.btn)

btn.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

sqlCon()

}

})

}

private void mSetText(String str){

TextView txt=(TextView)findViewById(R.id.txt)

txt.setText(str)

}

private void sqlCon(){

try {

Class.forName("com.mysql.jdbc.Driver")

} catch (Exception e) {

e.printStackTrace()

}

try {

String url ="jdbc:mysql://192.168.142.128:3306/mysql?user=zzfeihua&password=12345&useUnicode=true&characterEncoding=UTF-8"//链接数据库语句

Connection conn= (Connection) DriverManager.getConnection(url)//链接数据库

Statement stmt=(Statement) conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE)

String sql="select * from user"//查询user表语句

ResultSet rs=stmt.executeQuery(sql)//执行查询

StringBuilder str=new StringBuilder()

while(rs.next()){

str.append(rs.getString(1)+"\n")

}

mSetText(str.toString())

rs.close()

stmt.close()

conn.close()

} catch (Exception e) {

e.printStackTrace()

}

}

}

不过eclipse老是提示：

warning: Ignoring InnerClasses attribute for an anonymous inner class that doesn't come with an associated EnclosingMethod attribute. (This class was probably produced by a broken compiler.)

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