以下的文章主要介绍的是JDBC 连接MySQL数据库的实际操作过程以及在其实际操作中期实际应用代码的描述,以下就是JDBC 连接MySQL数据库的具体方案的描述,希望在你今后的学习中会有所帮助。 publicclassMySQLJdbc{ publicStringdriverName=com.MySQL.jdbc.Driv
以下的文章主要介绍的是JDBC 连接MySQL数据库的实际操作过程以及在其实际操作中期实际应用代码的描述,以下就是JDBC 连接MySQL数据库的具体方案的描述,希望在你今后的学习中会有所帮助。
public class MySQLJdbc {
public String driverName = "com.MySQL.jdbc.Driver";
public String url = "jdbc:MySQL://localhost:3306/oa";
public String userName = "root";
public String userPwd = "me";
/**
* Apr 19, 2009 12:49:55 PM
*
* @param args
*/
public static void main(String[] args) {
MySQLJdbc my=newMySQLJdbc();
my.read();
}
public void read() {
String queryString = "select userName,realName from user";
Connection conn = null;
Statement st = null;
ResultSet rs = null;
try {
加载驱动
Class.forName(driverName);
创建连接MySQL数据库
conn = DriverManager.getConnection(url, userName, userPwd);
创建Statement
st = conn.createStatement();
执行sql语句,得到查询结果
rs = st.executeQuery(queryString);
输出查询结果
while (rs.next()) {
System.out.println("userName:" + rs.getString("userName")
+ " realName:" + rs.getString("realName"));
}
关闭资源
rs.close();
st.close();
conn.close();
} catch (Exception ex) {
输出错误信息
ex.printStackTrace();
} finally {
finally子句总是会执行(就算发生错误),这样可以保证资源的绝对关闭
try {
if (rs != null)
rs.close();
} catch (SQLException e) {
e.printStackTrace();
}
try {
if (st != null)
st.close();
} catch (SQLException e) {
e.printStackTrace();
}
try {
if (conn != null)
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
以上的相关内容就是对JDBC 连接MySQL数据库的介绍,望你能有所收获。

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