标签：jdbc
package com.yjm.ldapdao;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.apache.log4j.Logger;
public class DAODB {
Connection conn;
PreparedStatement pst;
ResultSet rs;
public static Logger logger = Logger.getLogger(DAODB.class);
public DAODB() {
}
public Connection conn() {
try {
if (conn == null) {
if (LdapConf.log.equals("yes")) {
logger.info("创建连接...");
}
conn = DriverManager.getConnection(LdapConf.dburl,
LdapConf.dbusername, LdapConf.dbpassword);
}
} catch (SQLException e) {
logger.info("创建数据库连接失败...");
logger.info(e);
e.printStackTrace();
}
return conn;
}
public void closeConn() {
try {
if (rs != null) {
rs.close();
if (LdapConf.log.equals("yes")) {
logger.info("close rs");
}
}
if (pst != null) {
pst.close();
if (LdapConf.log.equals("yes")) {
logger.info("close pst");
}
}
if (conn != null) {
conn.close();
logger.info("close conn");
}
} catch (SQLException e) {
logger.info(e);
e.printStackTrace();
}
}
public PreparedStatement pre(String sql) {
try {
logger.info("创建 pst...");
pst = conn.prepareStatement(sql, ResultSet.TYPE_SCROLL_INSENSITIVE,
ResultSet.CONCUR_READ_ONLY);
} catch (SQLException e) {
e.printStackTrace();
}
return pst;
}
public ResultSet rs() {
try {
logger.info("获得结果集...");
rs = pst.executeQuery();
} catch (SQLException e) {
logger.info(e);
e.printStackTrace();
}
return rs;
}
public void closePreparedStatement() {
try {
if (pst != null) {
pst.close();
logger.info("close pst");
}
} catch (SQLException e) {
e.printStackTrace();
}
}
public void closeResultSet() {
try {
if (rs != null) {
rs.close();
logger.info("close rs");
}
} catch (SQLException e) {
logger.info(e);
e.printStackTrace();
}
}
}自己按要求写的jdbc 备份复用记载。
标签：jdbc
原文地址：http://yjm199.blog.51cto.com/4408395/1557375
