jsp连接mysql不成功_jsp连接数据库失败 怎么解决哈
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你上面这个e69da5e887aa3231313335323631343130323136353331333363366139不够详细，很难看出问题，我写一个给你，可以永久用的package com.util;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class BaseDao {
public static final String Driver="com.mysql.jdbc.Driver";
public static final String url="jdbc:mysql://localhost:3306/数据库名";
public static final String dbname="账号";
public static final String pwd="密码";
//获取数据库连接
public static Connection getCon(){
Connection conn=null;
try {
Class.forName(Driver);
conn=
DriverManager.getConnection(url,dbname,pwd);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return conn;
}
//释放资源
public static void close(Connection conn){
try {
if(conn!=null){
conn.close();
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void main(String[] args) {
System.out.println(BaseDao.getCon());
}
}
你要连接数据库，就
Connection conn=BaseDao.getCon();
String sql="select * from biao";
....
展开全部 你上面这个e69da5e887aa3231313335323631343130323136353331333363366139不够详细，很难看出问题，我写一个给你，可以永久用的package com.util; import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; public class BaseDao { public static final String Driver="com.mysql.jdbc.Driver"; public static final String url="jdbc:mysql://localhost:3306/数据库名"; public static final String dbname="账号"; public static final String pwd="密码"; //获取数据库连接 public static Connection getCon(){ Connection conn=null; try { Class.forName(Driver); conn= DriverManager.getConnection(url,dbname,pwd); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return conn; } //释放资源 public static void close(Connection conn){ try { if(conn!=null){ conn.close(); } } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } public static void main(String[] args) { System.out.println(BaseDao.getCon()); } } 你要连接数据库，就 Connection conn=BaseDao.getCon(); String sql="select * from biao"; ....