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package util;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
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.List;
/**
* 数据库工具类
* @author ruijie liruijie0603@126.com
* @date 2014-11-28
*/
public class DBUtil
{
private final static Logger logger = LoggerFactory.getLogger(DBUtil.class);
private static DBUtil dbUtil;
private String driverClass = "";
private String url = "";
private String username = "";
private String password = "";
private DBUtil() {
driverClass = Constant.dbdriver;
url = Constant.dburl;
username = Constant.dbusername;
password = Constant.dbpassword;
}
public static DBUtil newInstance() {
if (dbUtil == null) {
dbUtil = new DBUtil();
}
return dbUtil;
}
public Connection getConn() {
Connection conn = null;
try {
Class.forName(driverClass);
conn = DriverManager.getConnection(url, username, password);
} catch (ClassNotFoundException e) {
logger.error(e.getMessage(), e);
} catch (SQLException e) {
logger.error(e.getMessage(), e);
}
return conn;
}
public void insert(String sql) {
Connection conn = getConn();
Statement statement = null;
try {
statement = conn.createStatement();
statement.execute(sql);
} catch (SQLException e) {
e.printStackTrace();
} finally {
try {
if (statement != null)
statement.close();
if (conn != null)
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
public ResultSet query(String sql) {
Connection conn = getConn();
Statement statement = null;
ResultSet rs = null;
try {
statement = conn.createStatement();
rs = statement.executeQuery(sql);
} catch (SQLException e) {
e.printStackTrace();
}
return rs;
}
public void excute(String sql) {
Connection conn = getConn();
Statement statement = null;
try {
statement = conn.createStatement();
boolean b = statement.execute(sql);
} catch (SQLException e) {
e.printStackTrace();
}finally {
release(statement,conn);
}
}
public PreparedStatement getStatement(Connection conn, String sql) {
PreparedStatement pstmt = null;
try {
pstmt = conn.prepareStatement(sql);
} catch (SQLException e) {
logger.error(e.getMessage(), e);
}
return pstmt;
}
public void release(ResultSet rs, PreparedStatement pstmt, Connection conn) {
try {
if (rs != null) {
rs.close();
rs = null;
}
} catch (SQLException e) {
logger.error(e.getMessage(), e);
} finally {
try {
if (pstmt != null) {
pstmt.close();
pstmt = null;
}
} catch (SQLException e) {
logger.error(e.getMessage(), e);
} finally {
try {
if (conn != null) {
conn.close();
conn = null;
}
} catch (SQLException e) {
logger.error(e.getMessage(), e);
}
}
}
}
public void release(Statement pstmt, Connection conn) {
try {
if (pstmt != null) {
pstmt.close();
pstmt = null;
}
} catch (SQLException e) {
logger.error(e.getMessage(), e);
} finally {
try {
if (conn != null) {
conn.close();
conn = null;
}
} catch (SQLException e) {
logger.error(e.getMessage(), e);
}
}
}
public void ExcuteNonQueryBatch(List<String> sqlList) {
Connection conn = null;
Statement _Statement = null;
try {
if (sqlList != null && sqlList.size() > 0) {
conn = getConn();
conn.setAutoCommit(false);
for (int i = 0; i < sqlList.size(); i++) {
_Statement = conn.createStatement();
logger.info(sqlList.get(i));
_Statement.executeUpdate(sqlList.get(i));
// System.out.println(sqlList.get(i));
}
conn.commit();
}
} catch (Exception e) {
try {
if (_Statement != null)
_Statement.close();
if (conn != null)
conn.close();
} catch (SQLException e1) {
e1.printStackTrace();
}
e.printStackTrace();
}
}
}