android,app通过jdbc连接mysql
java.sql.SQLException: Access denied for user '192.168.1.101'@'root' (using password: YES),
以前试了一次，调试了很久，还是以失败而告终，最近因为项目需要又重新调试了一次，终于把他拿下，
GRANT ALL PRIVILEGES ON 数据库名.* TO root@'%' IDENTIFIED BY '密码' WITH GRANT OPTION;
在mysql的cmd下运行这句话就行了
MainActivity.java
package com.example.db_test_1;
import com.dao.Manipulate;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity {
private Handler handler;
Manipulate manipulate = new Manipulate();
Button btn_insert, btn_select;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn_insert = (Button) findViewById(R.id.btn_insert);
btn_select = (Button) findViewById(R.id.btn_select);
btn_insert.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO 自动生成的方法存根
// manipulate.insertData();
// Toast.makeText(MainActivity.this, "插入完成", Toast.LENGTH_SHORT)
// .show();
// ;
fun_insert();
}
});
btn_select.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO 自动生成的方法存根
// manipulate.selectData();
// Toast.makeText(MainActivity.this, "查询完成", Toast.LENGTH_SHORT)
// .show();
fun_select();
}
});
handler = new Handler() {
@Override
public void handleMessage(Message msg) {
// TODO 自动生成的方法存根
// super.handleMessage(msg);
switch (msg.what) {
case 1: // //插入
manipulate.insertData();
Toast.makeText(MainActivity.this, "插入完成",
Toast.LENGTH_SHORT).show();
;
break;
case 2: // /查询
manipulate.selectData();
Toast.makeText(MainActivity.this, "查询完成",
Toast.LENGTH_SHORT).show();
;
break;
}
}
};
}// //onCreate
public void fun_insert() {
new Thread(new Runnable() {
@Override
public void run() {
// TODO 自动生成的方法存根
manipulate.insertData();
Message m = new Message();
m.what = 1;
// handler.sendMessage(m);
}
}).start();
}// //fun_insert
public void fun_select() {
new Thread(new Runnable() {
@Override
public void run() {
// TODO 自动生成的方法存根
manipulate.selectData();
Message m = new Message();
m.what = 2;
// handler.sendMessage(m);
}
}).start();
}
}
Manipulate.java
package com.dao;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Connection;
import java.sql.Statement;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.util.Log;
public class Manipulate {
static Connection con; // 声明Connection对象
static Statement sql; // 声明Statement对象
static ResultSet res;
public static StringBuilder sb = new StringBuilder();
SimpleDateFormat sdf = new SimpleDateFormat();
String date_str = sdf.format(new Date());
public Connection getConnection() { // 连接数据库方法
try {
Class.forName("org.gjt.mm.mysql.Driver");
con = DriverManager.getConnection(
"jdbc:mysql://192.168.1.102:3306/db_11", "root", "0000");
// con = DriverManager.getConnection(
// "jdbc:mysql://192.168.0.154:3306/test", "root", "YES"); /////报错
} catch (Exception e) {
e.printStackTrace();
}
return con; // 返回Connection对象
}
// ///////////////
public static void insertData() {
Manipulate c = new Manipulate();
con = c.getConnection();
try {
sql = con.createStatement();
sql.executeUpdate(" insert into stu values(1,'Shara' ) ;");
Log.i("插入信息", "(1,'Shara' )");
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}// /insertdata
// ////////////////////
public static void selectData() {
Manipulate c = new Manipulate();
con = c.getConnection();
try {
sql = con.createStatement();
res = sql.executeQuery("select * from stu;");
while (res.next()) {
// System.out.println(res.getString("id"));
// System.out.println(res.getString("name"));
// System.out.println("-------------------\n"); /////均正确
sb.append(res.getString("id") + " " + res.getString("name")
+ "\n"); // /////////均正确
Log.i("查询信息", sb.toString());
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}// /Test
<uses-permission android:name="android.permission.还需要添加权限和mysql的jdbc（可自行下载）。前提是手机和电脑连接的都是同一个wifi
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="@+id/btn_insert"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="插入" />
<Button
android:id="@+id/btn_select"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="查询" />
</LinearLayout>
