JDBC - Java连接数据库通用代码

JDBC - Java连接数据库通用代码

大家可以保存到自己的代码库里啦，方便以后使用。
[code lang="java"]
package info.ggit.bbs2009.util;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class DB {
public static Connection createConn() {
Connection conn = null;
try {
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection("jdbc:mysql://localhost/bbs2009", "root", "root");
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
return conn;
}

public static PreparedStatement prepare(Connection conn, String sql) {
PreparedStatement ps = null;
try {
ps = conn.prepareStatement(sql);
} catch (SQLException e) {
e.printStackTrace();
}
return ps;
}

public static void close(Connection conn) {

try {
conn.close();
conn = null;
} catch (SQLException e) {
e.printStackTrace();
}
}
public static void close(Statement stmt) {
try {
stmt.close();
stmt = null;
} catch (SQLException e) {
e.printStackTrace();
}
}
public static void close(ResultSet rs) {
try {
rs.close();
rs = null;
} catch (SQLException e) {
e.printStackTrace();
}
}
}
[/code]
大家把保存下来呀，方便以后copy ~~嘿嘿