Question

如何用eclipse连接mysql数据库

Answer 1

你这是什么意思啊，
链接数据库其实很简单具体代码如下：
package db;
import java.sql.*;

public class DB {
private Connection con=null;
private Statement stmt=null;
private ResultSet rs=null;
public DB(){}
public Connection getConnection(){
String url="jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=utf8";
String dbuser="root";
String dbpass="sa";
String name="com.mysql.jdbc.Driver";
if(con==null){
try{
Class.forName(name).newInstance();

}catch(Exception e){
System.out.println(e);
}
try{
con=DriverManager.getConnection(url,dbuser,dbpass);
}catch(Exception e){}
}
return con;
}
public ResultSet exeQuery(String sql){
try{
con=getConnection();
if(con==null){
throw new Exception("没有可连接对象");
}
stmt=con.createStatement();
rs=stmt.executeQuery(sql);
}catch(Exception e){}
return rs;
}
public boolean update(String sql){
boolean flag=true;
try{
con=getConnection();
if(con==null) throw new Exception("没有可连接对象");
stmt=con.createStatement();
stmt.executeUpdate(sql);
}catch(Exception e){
flag=false;
System.out.println("异常:"+e);

}

return flag;
}

public void close(){
try{
if(rs!=null)try{rs.close();}catch(Exception e){System.out.println("rs"+e);}
try{stmt.close();}catch(Exception e){System.out.println("stmt"+e);}
try{con.close();}catch(Exception e){System.out.println("con"+e);}
}catch(Exception e){}
}
}

Answer 2

数据库名：select_test
用户名：root
密码：123456
连接成功后显示teacher_table表中的数据。
import java.sql.*;
class ConnMySql {
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
// TODO Auto-generated method stub
Class.forName("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection(
"jdbc:mysql://127.0.0.1:3306lect_test",
"root","123456");
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("select * from teacher_table");
while (rs.next()) {
System.out.println(rs.getInt(1) + "\t"
+rs.getString(2) + "\t"
+rs.getString(3) );
}
if (rs != null) {
rs.close();
}
if (stmt != null) {
stmt.close();
}
if (conn != null) {
conn.close();
}
}
}