数据库操作管理类

Sky Yi — Wed, 03 Sep 2008 09:19:00 GMT

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Types;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import org.apache.log4j.Logger;

/**
* 数据库操作管理类
*
* @author Harlyhood
*
*/
public class DBManager {

// --------------------------------------------------------- Instance
private static Logger logger = Logger.getLogger(DBManager.class);
// --------------------------------------------------------- Methods

// 数据库连接对�?br /> private Connection con;
// SQL语句对象
private Statement stmt;
// 带参数的Sql语句对象
private PreparedStatement pstmt;
// 记录集对�?br /> private ResultSet rs;
// 数据�q�接��理�Q�连接池对象�Q?br /> private DBConnectionManager dcm = null;

/** ***********************手动讄��的连接参�?******************************** */
@SuppressWarnings("unused")
private static String _DRIVER = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
@SuppressWarnings("unused")
private static String _URL = "jdbc:sqlserver://localhost:1433;database=Hospital_AI_DB;characterEncoding=gb2312";
@SuppressWarnings("unused")
private static String _USER_NA = "sa";
@SuppressWarnings("unused")
private static String _PASSWORD = "";

/** ********************************************************************** */

// 默认构�?br /> public DBManager() {
}

/** ****************************************************************************************** */
/**
* **************************************** 数据库连接初始化
* ***********************************
*/
/** ****************************************************************************************** */

/**
* 得到一个默认的数据库连接[�?com.hospital.dao.tools.db.properties文�g初始化]
*
* @throws Exception
*/
private void getConnection() {
  logger.info("###############open:::::从默认的配置文�g得到一个数据库�q�接");
  // 获取一个连接池��理�cȝ��实例
  dcm = DBConnectionManager.getInstance();
  // 得到一个数据库�q�接
  con = dcm.getConnection("mysql");

  try {
   con.setAutoCommit(false);
  } catch (SQLException e) {

e.printStackTrace();
}
}

/**
* 从指定参数得��C��个连接对�?br /> *
* @param driver
* @param url
* @param user_na
* @param password
* @throws Exception
*/
public void getConnection(String driver, String url, String user_na,
   String password) throws Exception {
  try {
   logger.info("###############open:::::从指定配�|�中得到一个数据库�q�接");
   Class.forName(driver);
   con = DriverManager.getConnection(url, user_na, password);
  } catch (ClassNotFoundException ex) {
   logger
     .info("###############Error[com.hospital.dao.tools.DBManager^^^Method:getConnection^^^Line:81]找不到类驱动�c? "
       + driver);
   throw ex;
  } catch (SQLException ex) {
   logger
     .info("###############Error[com.hospital.dao.tools.DBManager^^^Method:getConnection^^^Line:81]加蝲�c? "
       + driver + " 时出�?SQLException 异常");
   throw ex;
  }
}

/** ****************************************************************************************** */
/**
* **************************************** 数据库操作方�?br /> * ***********************************
*/
/** ****************************************************************************************** */

/**
* 执行SQL语句操作(更新数据无参�?
*
* @param strSql
*            SQL语句
* @throws Exception
*/
public boolean executeUpdate(String strSql) throws SQLException {
  getConnection();
  // getConnection(_DRIVER,_URL,_USER_NA,_PASSWORD);
  boolean flag = false;
  stmt = con.createStatement();
  logger.info("###############::执行SQL语句操作(更新数据无参�?:" + strSql);
  try {
   if (0 < stmt.executeUpdate(strSql)) {
    close_DB_Object();
    flag = true;
    con.commit();
   }
  } catch (SQLException ex) {
   logger
     .info("###############Error DBManager Line126::执行SQL语句操作(更新数据无参�?:"
       + strSql + "��p�|!");
   flag = false;
   con.rollback();
   throw ex;
  }
  return flag;

}

/**
* 执行SQL语句操作(更新数据有参�?
*
* @param strSql
*            sql指��o
* @param prams
*            参数列表
* @return
* @throws SQLException
*/
public boolean executeUpdate(String strSql, HashMap prams)
   throws SQLException, ClassNotFoundException {
  getConnection();
  // getConnection(_DRIVER,_URL,_USER_NA,_PASSWORD);
  boolean flag = false;
  try {
   pstmt = con.prepareStatement(strSql);
   setParamet(pstmt, prams);
   logger.info("###############::执行SQL语句操作(更新数据有参�?:" + strSql);

   if (0 < pstmt.executeUpdate()) {
    close_DB_Object();
    flag = true;
    con.commit();
   }
  } catch (SQLException ex) {
   logger
     .info("###############Error DBManager Line121::执行SQL语句操作(更新数据无参�?:"
       + strSql + "��p�|!");
   flag = false;
   con.rollback();
   throw ex;
  } catch (ClassNotFoundException ex) {
   logger
     .info("###############Error DBManager Line152::执行SQL语句操作(更新数据无参�?:"
       + strSql + "��p�|! 参数讄��c�d��错误!");
   con.rollback();
   throw ex;
  }
  return flag;

}

/**
* 执行SQL语句操作(查询数据无参�?
*
* @param strSql
*            SQL语句
* @return 数组对象列表
* @throws Exception
*/
public ArrayList executeSql(String strSql)
   throws Exception {
  getConnection();
  // getConnection(_DRIVER,_URL,_USER_NA,_PASSWORD);
  stmt = con.createStatement();
  logger.info("###############::执行SQL语句操作(查询数据):" + strSql);
  rs = stmt.executeQuery(strSql);
  con.commit();
  if (null != rs) {
   return convertResultSetToArrayList(rs);
  }
  close_DB_Object();
  return null;
}

/**
* 执行SQL语句操作(查询数据有参�?
*
* @param strSql
*            SQL语句
* @param prams
*            参数列表
* @return 数组对象列表
* @throws Exception
*/
public ArrayList executeSql(String strSql,
   HashMap prams) throws Exception {
  getConnection();
  // getConnection(_DRIVER,_URL,_USER_NA,_PASSWORD);
  pstmt = con.prepareStatement(strSql);
  setParamet(pstmt, prams);
  logger.info("###############::执行SQL语句操作(查询数据):" + strSql);
  rs = pstmt.executeQuery();
  con.commit();
  if (null != rs) {
   return convertResultSetToArrayList(rs);
  }
  return null;
}

/**
* 执行存储�q�程(查询数据无参�?
*
* @param procName
*            存储�q�程名称
* @return 数组列表对象
* @throws Exception
*/
public ArrayList executeProcedureQuery(
   String procName) throws Exception {
  getConnection();// 获取�q�接
  String callStr = "{call " + procName + "}";// 构造执行存储过�E�的sql指��o
  CallableStatement cs = con.prepareCall(callStr);
  logger.info("###############::执行存储�q�程(查询数据):" + procName);
  rs = cs.executeQuery();
  con.commit();
  cs.close();
  close_DB_Object();
  return convertResultSetToArrayList(rs);
}

/**
* 执行存储�q�程(查询数据,带参�?�q�回�l�果集合
*
* @param procName
*            存储�q�程名称
* @param parameters
*            参数对象数组
* @param al
*            数组列表对象
* @return 数组列表对象
* @throws Exception
*/
public ArrayList executeProcedureQuery(
   String procName, Object[] parameters) throws Exception {
  int parameterPoint = 0;
  // 获取存储�q�程信息列表集合
  ArrayList procedureInfo = getProcedureInfo(procName);
  // 获取存储�q�程的完全名�U?br />   String procedureCallName = getProcedureCallName(procName,parameters.length);
  // 获取�q�接对象
  getConnection();
  // 初始�?存储�q�程执行对象
  CallableStatement cs = con.prepareCall(procedureCallName);
  // 参数下标变量
  int index = 0;
  // 获取存储�q�程信息列表集合�?�q�代�?对象
  Iterator iter = procedureInfo.iterator();
  // 遍历存储�q�程信息列表集合
  while (iter.hasNext()) {
   HashMap hm = iter.next();

   parameterPoint++;
   // 如果参数是输入参�?way = 0
   if (hm.get("WAY").equals("0")) {
    // 讄��参数到cs
    cs.setObject(parameterPoint, parameters[index]);
    // 参数下标+1
    index++;
   }
  }
  // 释放�q�个对象,做�ؓ�W�二�ơ��?br />   procedureInfo = null;
  logger.info("###############::执行存储�q�程(查询数据):::::" + procedureCallName);
  rs = cs.executeQuery();
  con.commit();
  procedureInfo = convertResultSetToArrayList(rs);
  cs.close();
  close_DB_Object();
  return procedureInfo;

}

/**
* 执行存储�q�程(更新�Q�查询数据[��单查询、非�U�录集]�Q�返回输出参数[非纪录集])
*
* @param procName
*            存储�q�程名称
* @param parameters
*            参数对象数组
* @param os
*            输出参数对象数组
* @return 输出参数对象数组
* @throws Exception
*/
public Object[] executeProcedureUpdate(String procName, Object[] parameters)
   throws Exception {
  logger.info("------------------------------------------------------------------------------------------------------");
  logger.info(" Run --> executeProcedureUpdate ##############   正在执行存储�q�程: " + procName +"   ##############");
  CallableStatement cs = null;
  Object []returnVal = null;
  try {
  // 获取存储�q�程调用全名
  String fullPCallName = getProcedureCallName(procName,parameters.length);
  logger.info(" Run --> executeProcedureUpdate #   存储�q�程命��o: " + fullPCallName +"   #");
  //获取存储�q�程参数信息
  ArrayList p_Call_Info_List = getProcedureInfo(procName);
  //获取�q�接
  getConnection();
  //创徏存储�q�程执行对象
  cs = con.prepareCall(fullPCallName);
  //数组下标
  int index = 1;
  //输出参数下标 �U�录
        ArrayList outPutIndexList = new ArrayList();
        logger.info(" Run --> executeProcedureUpdate #   参数个数�? " + parameters.length +"   #");
  for(HashMap tempHash:p_Call_Info_List)
  {
   if("0".equals(tempHash.get("WAY")))
      {
    //讄��输入参数
    cs.setObject(index, parameters[index-1]);
    logger.info(" Run --> executeProcedureUpdate #   输入 Input: �~�号:" + index +" �? "+parameters[index-1]+" �c�d��: "+parameters[index-1].getClass()+"   #");
   }
   else
   {
    //注册输出参数
    cs.registerOutParameter(index, getDataType(tempHash.get("TYPENAME").toString()));
    //�U�录输出参数的下�?br />     outPutIndexList.add(index);
    logger.info(" Run --> executeProcedureUpdate #   输出 OutPut: �~�号:" + index +" �? "+parameters[index-1]+" �c�d��: "+parameters[index-1].getClass()+"   #");
   }
   index++;
  }
  logger.info(" Run --> executeProcedureUpdate #   参数讄��完毕,正在执行�?... :   #");

  //-------------------- 执行 -----------------
  if(!cs.execute())
  {
   returnVal = new Object[outPutIndexList.size()];
   logger.info(" Run --> executeProcedureUpdate #   执行成功! :   #");
   //取输出参数的 �q�回�?br />    for(int i = 0 ;i    {
    returnVal[i] = cs.getObject(outPutIndexList.get(i));
    logger.info(" Run --> executeProcedureUpdate #   �q�回�?"+(i+1)+" "+returnVal[i]+"   #");
   }
   con.commit();//提交
  }
  } catch (Exception e) {
   logger.info(" Run --> executeProcedureUpdate #   执行��p�|!事务回滚�?.. :   #");
   con.rollback();
   throw e;
  }
  logger.info("------------------------------------------------------------------------------------------------------");
  return returnVal;
}

/** ****************************************************************************************** */
/**
* ********************************* ��工�?br /> * ************************************************
*/
/** ****************************************************************************************** */

/**
* 关闭数据对象
*/
public void close_DB_Object() {
  logger.info("###############close:::::关闭�q�接对象�Q�语句对象，记录集对�?);
  if (null != rs) {
   try {
    rs.close();
   } catch (SQLException ex) {
    rs = null;
   }
  }
  if (null != stmt) {
   try {
    stmt.close();
   } catch (SQLException ex) {
    stmt = null;
   }
  }
  if (null != pstmt) {
   try {
    pstmt.close();
   } catch (SQLException ex) {
    pstmt = null;
   }
  }
  if (con != null) {
   dcm.freeConnection("mysql", con);
  }
}

/**
* 讄��Sql 指��o参数
*
* @param p_stmt
*            PreparedStatement
* @param pramets
*            HashMap
*/
private PreparedStatement setParamet(PreparedStatement p_stmt,
   HashMap pramets) throws ClassNotFoundException,
   SQLException {
  // 如果参数为空
  if (null != pramets) {
   // 如果参数个数�?
   if (0 <= pramets.size()) {
    for (int i = 1; i <= pramets.size(); i++) {
     try {
      // 字符�c�d�� String
      if (pramets.get(i).getClass() == Class
        .forName("java.lang.String")) {
       p_stmt.setString(i, pramets.get(i).toString());
      }
      // 日期�c�d�� Date
      if (pramets.get(i).getClass() == Class
        .forName("java.sql.Date")) {
       p_stmt.setDate(i, java.sql.Date.valueOf(pramets
         .get(i).toString()));
      }
      // 布尔�c�d�� Boolean
      if (pramets.get(i).getClass() == Class
        .forName("java.lang.Boolean")) {
       p_stmt.setBoolean(i, (Boolean) (pramets.get(i)));
      }
      // 整型 int
      if (pramets.get(i).getClass() == Class
        .forName("java.lang.Integer")) {
       p_stmt.setInt(i, (Integer) pramets.get(i));
      }
      // ��点 float
      if (pramets.get(i).getClass() == Class
        .forName("java.lang.Float")) {
       p_stmt.setFloat(i, (Float) pramets.get(i));
      }
      // 双精度型 double
      if (pramets.get(i).getClass() == Class
        .forName("java.lang.Double")) {
       p_stmt.setDouble(i, (Double) pramets.get(i));
      }

     } catch (ClassNotFoundException ex) {
      throw ex;
     } catch (SQLException ex) {
      throw ex;
     }
    }
   }
  }
  return p_stmt;
}

/**
* 转换记录集对象�ؓ数组列表对象
*
* @param rs
*            �U�录集合对象
* @return 数组列表对象
* @throws Exception
*/
private ArrayList convertResultSetToArrayList(
   ResultSet rs) throws Exception {
  logger.info("###############::转换记录集对象�ؓ数组列表对象");
  // 获取rs 集合信息对象
  ResultSetMetaData rsmd = rs.getMetaData();
  // 创徏数组列表集合对象
  ArrayList tempList = new ArrayList();
  HashMap tempHash = null;
  // 填充数组列表集合
  while (rs.next()) {
   // 创徏键值对集合对象
   tempHash = new HashMap();
   for (int i = 0; i < rsmd.getColumnCount(); i++) {
    // 遍历每列数据�Q�以键值�Ş式存在对象tempHash�?br />     tempHash.put(rsmd.getColumnName(i + 1).toUpperCase(), rs
      .getString(rsmd.getColumnName(i + 1)));
   }
   // �W�一个键值对�Q�存储在tempList列表集合对象�?br />    tempList.add(tempHash);
  }
  close_DB_Object();// 关闭相关链接
  return tempList;// �q�回填充完毕的数�l�列表集合对�?br /> }

/**
* 从数据库得到存储�q�程信息
*
* @param procName
*            存储�q�程名称
* @return 数组列表对象
* @throws Exception
*/
private ArrayList getProcedureInfo(String procName)
   throws Exception {
  return this.executeSql("select Syscolumns.isoutparam as Way,systypes.name as TypeName from sysobjects,syscolumns,systypes where systypes.xtype=syscolumns.xtype and syscolumns.id=sysobjects.id and sysobjects.name='"
    + procName + "' order by Syscolumns.isoutparam");
}

/**
* 从数据库得到存储�q�程参数个数
*
* @param procName
*            存储�q�程名称
* @return 数组列表对象
* @throws Exception
*/
@SuppressWarnings("unused")
private int getParametersCount(String procName) throws Exception {
  int returnVal = 0;
  for (HashMap tempHas : this
    .executeSql("select count(*) as RowsCount from sysobjects,syscolumns,systypes where systypes.xtype=syscolumns.xtype and syscolumns.id=sysobjects.id and sysobjects.name='"
      + procName + "'")) {
   returnVal = Integer.parseInt(tempHas.get("ROWSCOUNT").toString());
  }
  return returnVal;
}

/**
* 得到调用存储�q�程的全�?br /> *
* @param procName
*            存储�q�程名称
* @return 调用存储�q�程的全�?br /> * @throws Exception
*/
private String getProcedureCallName(String procName, int prametCount)
   throws Exception {
  String procedureCallName = "{call " + procName;
  for (int i = 0; i < prametCount; i++) {
   if (0 == i) {
    procedureCallName = procedureCallName + "(?";
   }
   if (0 != i) {
    procedureCallName = procedureCallName + ",?";
   }
  }
  procedureCallName = procedureCallName + ")}";
  return procedureCallName;
}

/**
* 得到数据�c�d��的整型�?br /> *
* @param typeName
*            �c�d��名称
* @return 数据�c�d��的整型�?br /> */
private int getDataType(String typeName) {
  if (typeName.equals("varchar"))
   return Types.VARCHAR;
  if (typeName.equals("int"))
   return Types.INTEGER;
  if (typeName.equals("bit"))
   return Types.BIT;
  if (typeName.equals("float"))
   return Types.FLOAT;
  return 0;
}

// 讄��驱动路径
@SuppressWarnings("static-access")
public void set_DRIVER(String _DRIVER) {
this._DRIVER = _DRIVER;
}

// 讄��数据库密�?br /> @SuppressWarnings("static-access")
public void set_PASSWORD(String _PASSWORD) {
this._PASSWORD = _PASSWORD;
}

// 讄��数据库连接字�W�串
@SuppressWarnings("static-access")
public void set_URL(String _URL) {
this._URL = _URL;
}

// 讄��数据库用户名
@SuppressWarnings("static-access")
public void set_USER_NA(String _USER_NA) {
this._USER_NA = _USER_NA;
}

}

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