Java如何连接到MySQL数据库

Java如何连接到MySQL数据库

下载：mysql-connector-java-5.1.38.tar.gz

http://dev.mysql.com/downloads/connector/j/

tar zxvf mysql-connector-java-5.1.38.tar.gz

解压后

linuxidc@Ubuntu:~/Downloads$ cd ./mysql-connector-java-5.1.38/

linuxidc@ubuntu:~/Downloads/mysql-connector-java-5.1.38$ ls

build.xml COPYING mysql-connector-java-5.1.38-bin.jar README.txt

CHANGES docs README src

linuxidc@ubuntu:~/Downloads/mysql-connector-java-5.1.38$ sudo cp mysql-connector-java-5.1.38-bin.jar /home/tomcat/lib

[sudo] password for linuxidc:

Add External JARs

代码：

import java.sql.*;

publicclass JDBCTest {

publicstaticvoid main(String[] args){

// 驱动程序名

String driver = "com.mysql.jdbc.Driver";

// URL指向要访问的数据库名bookstore

String url = "jdbc:mysql://127.0.0.1:3306/bookstore";

// MySQL配置时的用户名

String user = "root"; 

// MySQL配置时的密码

String password = "password";

try { 

// 加载驱动程序

Class.forName(driver);

// 连续数据库

Connection conn = DriverManager.getConnection(url, user, password);

if(!conn.isClosed()) 

System.out.println("Succeeded connecting to the Database!");

// statement用来执行SQL语句

Statement statement = conn.createStatement();

// 要执行的SQL语句

String sql = "select * from books";

// 结果集

ResultSet rs = statement.executeQuery(sql);

System.out.println("-----------------");

System.out.println("执行结果如下所示:");

System.out.println("-----------------------------------------------");

System.out.println(" ISBN" + "\t" + " author"+ "\t" + " bookname"+ "\t" + " bookname");

System.out.println("-----------------------------------------------");

String name = null;

while(rs.next()) {

// 选择ISBN这列数据

name = rs.getString("ISBN");

//System.out.println(name);

// 首先使用ISO-8859-1字符集将name解码为字节序列并将结果存储新的字节数组中。

// 然后使用GB2312字符集解码指定的字节数组

name = new String(name.getBytes("ISO-8859-1"),"GB2312");

// 输出结果

System.out.println(name + "\t" + rs.getString("author") + "\t" + rs.getString("bookname") + "\t" + "\t" + rs.getString("price"));

}

rs.close();

conn.close();

} catch(ClassNotFoundException e) {

System.out.println("Sorry,can`t find the Driver!"); 

e.printStackTrace();

} catch(SQLException e) {

e.printStackTrace();

} catch(Exception e) {

e.printStackTrace();

} 

} 

}

输出：

Succeeded connecting to the Database!

-----------------

执行结果如下所示:

-----------------------------------------------

ISBN author bookname bookname

-----------------------------------------------

123456 linuxidc java 23.40

234567 linuxidc C++ 34.60