mysql 数据库操作封装

package creator.common.db;

import java.io.InputStream;
import java.sql.*;
import javax.sql.*;
import javax.naming.*;

/**
*
* <p>Title: dbBean.java</p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2004</p>
* <p>Company: </p>
* @author TanBo
* @version 1.0
*/
public class DbBean {
public java.sql.Connection conn = null; //connection object
public ResultSet rs = null; //resultset object
public Statement stmt = null; //statement object
public PreparedStatement prepstmt = null; //preparedstatement object
private String drivers = null; //connection parameter:drivers
private String url = null; //connection parameter:url
private String user = null; //connection parameter:user
private String password = null; //connection parameter:password
private String jndi_name = null; //connection pool parameter:jndi name

/**
* init()
*/
public DbBean(){
try{
//parameter init
drivers = creator.config.ConfigBundle.getString("drivers");
url = creator.config.ConfigBundle.getString("url");
user = creator.config.ConfigBundle.getString("user");
password = creator.config.ConfigBundle.getString("password");
jndi_name = creator.config.ConfigBundle.getString("jndi_name");

//db connection pool init
//InitialContext env = new InitialContext();
//javax.sql.DataSource pool = (javax.sql.DataSource)env.lookup(jndi_name);
//conn = pool.getConnection();

//db connection init
Class.forName(drivers);
conn = DriverManager.getConnection(url,user,password);

//db statement init
stmt = conn.createStatement();
}catch(Exception e){
System.out.println("dbBean: init error!"+e.toString());
}
}

/**
* @function prepareStatement
* @param sql String
* @throws SQLException
*/
public void prepareStatement(String sql) throws SQLException {
prepstmt = conn.prepareStatement(sql);
}

/**
* @function prepareStatement
* @param sql String
* @param resultSetType int
* @param resultSetConcurrency int
* @throws SQLException
*/
public void prepareStatement(String sql, int resultSetType, int resultSetConcurrency)
throws SQLException {
prepstmt = conn.prepareStatement(sql, resultSetType, resultSetConcurrency);
}

/**
* @function executeQuery
* @param sql String
* @throws SQLException
* @return ResultSet
*/
public ResultSet executeQuery(String sql) throws SQLException {
if (stmt != null) {
return stmt.executeQuery(sql);
}else return null;
}

/**
* @function executeQuery
* @throws SQLException
* @return ResultSet
*/
public ResultSet executeQuery() throws SQLException {
if (prepstmt != null) {
return prepstmt.executeQuery();
}else return null;
}

/**
* @function executeUpdate
* @param sql String
* @throws SQLException
*/
public void executeUpdate(String sql) throws SQLException {
if (stmt != null)
stmt.executeUpdate(sql);
}

/**
* @function executeUpdate
* @throws SQLException
*/
public void executeUpdate() throws SQLException {
if (prepstmt != null)
prepstmt.executeUpdate();
}

/**
* @function executeUpdate
* @throws SQLException
*/
public void executeBatch() throws SQLException {
if (prepstmt != null)
prepstmt.executeBatch();
}

/**
* @function addBatch
* @param value String
* @throws SQLException
*/
public void addBatch(String value) throws SQLException {
prepstmt.addBatch(value);
}

/**
* @function setString
* @param index int
* @param value String
* @throws SQLException
*/
public void setString(int index,String value) throws SQLException {
prepstmt.setString(index, value);
}

/**
* @function setInt
* @param index int
* @param value int
* @throws SQLException
*/
public void setInt(int index,int value) throws SQLException {
prepstmt.setInt(index,value);
}

/**
* @function setBoolean
* @param index int
* @param value boolean
* @throws SQLException
*/
public void setBoolean(int index,boolean value) throws SQLException {
prepstmt.setBoolean(index,value);
}

/**
* @function setDate
* @param index int
* @param value Date
* @throws SQLException
*/
public void setDate(int index,Date value) throws SQLException {
prepstmt.setDate(index,value);
}

/**
* @function setLong
* @param index int
* @param value long
* @throws SQLException
*/
public void setLong(int index,long value) throws SQLException {
prepstmt.setLong(index,value);
}

/**
* @function setFloat
* @param index int
* @param value float
* @throws SQLException
*/
public void setFloat(int index,float value) throws SQLException {
prepstmt.setFloat(index,value);
}

/**
* @function setBytes
* @param index int
* @param value byte[]
* @throws SQLException
*/
public void setBytes(int index,byte[] value) throws SQLException{
prepstmt.setBytes(index,value);
}

/**
* @function setBinaryStream
* @param index int
* @param value InputStream
* @param len int
* @throws SQLException
*/
public void setBinaryStream(int index,InputStream value,int len) throws SQLException{
prepstmt.setBinaryStream(index,value,len);
}

/**
* @function setTimestamp
* @param index int
* @param timestamp Timestamp
* @throws SQLException
*/
public void setTimestamp(int index,Timestamp timestamp) throws SQLException {
prepstmt.setTimestamp(index, timestamp);
}

/**
* @function setAutoCommit
* @param value boolean
* @throws SQLException
*/
public void setAutoCommit(boolean value) throws SQLException{
if(this.conn != null)
this.conn.setAutoCommit(value);
}

/**
* @function commit
* @throws SQLException
*/
public void commit() throws SQLException{
this.conn.commit();
}

/**
* @function rollback
* @throws SQLException
*/
public void rollback() throws SQLException{
this.conn.rollback();
}

/**
* @function close
* @throws Exception
*/
public void close(){
try{
if (rs != null) {
rs.close();
rs = null;
}
}catch(Exception e){
System.out.println("dbBean close rs error!");
}finally{
try{
if (stmt != null) {
stmt.close();
stmt = null;
}
}catch(Exception e){
System.out.println("dbBean close stmt error!");
}finally{
try{
if (prepstmt != null) {
prepstmt.close();
prepstmt = null;
}
}catch(Exception e){
System.out.println("dbBean close prepstmt error!");
}finally{
try{
if (conn != null) {
conn.close();
conn = null;
}
}catch(Exception e){
System.out.println("dbBean close conn error!");
}
}
}
}
}

}