安卓app 怎么连接mysql
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发布时间：2022-04-21 19:48
共1个回答
热心网友
时间：2022-04-07 15:52
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 proced by a broken compiler.)
