简单的Java连接数据库
import java.sql.*;public class ConnDatabase {private static final String DBDRIVER="com.microsoft.sqlserver.jdbc.SQLServerDriver";private static final String DBURL="jdbc:sqlserver://localhost:1433;DatabaseName=School1";private static final String DBUSER="sa";private static final String DBPWD="sa"; //Refreshpublic static void Query(ResultSet rs) throws Exception{System.out.println("No\tName\tAge\tSex");//学号、姓名、年龄、性别while(rs.next()){String no = rs.getString("No");String name = rs.getString("Name");int age = rs.getInt("Age");String sex = rs.getString("Sex");System.out.println(no+"\t"+name+"\t"+age+"\t"+sex);}}public static void main(String[] args) throws Exception{Class.forName(DBDRIVER);//加载驱动Connection conn = DriverManager.getConnection(DBURL,DBUSER,DBPWD);//连接数据库Statement stmt = conn.createStatement();//数据库操作//建表stmt.execute("CREATE TABLE Stu5"+"(No varchar(20) PRIMARY KEY,"+"Name varchar(10),"+"Age int,"+"Sex varchar(2))");String sqlResult = "select * from Stu5";ResultSet rs = stmt.executeQuery(sqlResult);Query(rs);//Addstmt.executeUpdate("INSERT INTO Stu5(No,Name,Age,Sex)"+"VALUES('134','陈艳',19,'女')");rs = stmt.executeQuery(sqlResult);Query(rs);//Changestmt.executeUpdate("UPDATE Stu5 SET Age = 20 WHERE Name = '陈艳'");rs = stmt.executeQuery(sqlResult);Query(rs);//Deletestmt.executeUpdate("DELETE FROM Stu5 WHERE Name='陈艳'");rs = stmt.executeQuery(sqlResult);Query(rs);rs.close();stmt.close();conn.close();}}
PS：private static final String DBURL="jdbc:sqlserver://localhost:1433;DatabaseName=School1"；这行代码有两个地方需要注意：
1、DBURL需要根据实际情况更改。
2、DatabaseName=School1，之前我是写的DatabaseName=‘School1’，结果错了。这个小错误，我花了好久时间找出来并改正，希望大家注意，不要和我犯同样的错误。