jdbc 容易工具类的使用
日期：2014-05-16 浏览次数：20567 次
jdbc 简单工具类的使用
package Jdbcday02;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
public class ConnectionUtils {
private static String url;
private static String driver;
private static String username;
private static String password;
static {
Properties props = new Properties();
try {
props.load(ConnectionUtils.class.getClassLoader()
.getResourceAsStream(
"Jdbcday02/db_oracle.properties"));
} catch (IOException e) {
}
if (props != null) {
url = props.getProperty("url");
driver = props.getProperty("driver");
username = props.getProperty("username");
password = props.getProperty("password");
try {
Class.forName(driver);
} catch (ClassNotFoundException e) {
}
}
}
public static Connection openConnection() throws SQLException {
return DriverManager.getConnection(url, username, password);
}
public static void closeConnection(Connection con) {
try {
if (con != null) {
con.close();
}
} catch (SQLException e) {
}
}
public static void closeStatement(Statement stmt) {
try {
if (stmt != null) {
stmt.close();
}
} catch (SQLException e) {
}
}
public static void closeStatement(PreparedStatement pstmt) {
try {
if (pstmt != null) {
pstmt.close();
}
} catch (SQLException e) {
}
}
public static void closeResultSet(ResultSet rs) {
try {
if (rs != null) {
rs.close();
}
} catch (SQLException e) {
}
}
}
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