Java连接Sql Servers数据库

1.首先，将数据库驱动jar包导入到lib目录，sqljdbc41.jar

https://download.csdn.net/download/cc1969281777/10663001

2.创建工具类

package utils;
import java.sql.Connection;
import java.sql.DriverManager;
public class JdbcUtils {
    //驱动路径
	private static final String DBDRIVER="com.microsoft.sqlserver.jdbc.SQLServerDriver";
	//数据库地址
	private static final String DBURL="jdbc:sqlserver://localhost:1433;DataBaseName=ConstructionDB";
	//数据库登录用户名
	private static final String User="sa";
	//密码
	private static final String Password="123";
	//数据库连接
	public static Connection conn=null;
	public static Connection getConnection(){
		try{
			//注册驱动
			Class.forName(DBDRIVER);
			//获取连接
			conn=DriverManager.getConnection(DBURL,User,Password);
		}
		catch(Exception e){
			e.printStackTrace();
		}
		//返回连接
		return conn;
	}
}

3.创建dao类

使用JDBCUtils工具，首先导入jar包，commons-dbutils-1.7.jar

https://download.csdn.net/download/cc1969281777/10663022

package dao;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.List;

import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import enties.Project;
import utils.JdbcUtils;
public class ProjectDao {

	public static List<Project> getAll() throws SQLException{
		Connection conn=JdbcUtils.getConnection();
		QueryRunner qr=new QueryRunner();
		String sql="select * from T_project";
		List list=qr.query(conn, sql, new BeanListHandler(Project.class));
		return list;
	}
/*	测试
 * public static void main(String args[]) throws SQLException{
		List<Project> list=getAll();
		Project p;
		for(int i=0;i<list.size();i++){
			p=list.get(i);
			System.out.println(p.getProject_id()+"\t"+p.getDeputy_name());
		}
	}*/

}