Java如何连接到MySQL数据库
下载：mysql-connector-java-5.1.38.tar.gz
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