datamanager.java

我的文件是一个数据添加页面

package kmd.gxml;
import kmd.Debug;
import kmd.commo.PageList;
import kmd.commo.SQLTools;
import kmd.commo.SequenceProducer;
import kmd.jdbc.DBConnection;

import java.util.ArrayList;
import java.sql.Connection;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Timestamp;
import java.sql.ResultSetMetaData;
import java.sql.Types;




/**
 * 对具体数据对象进行操作的类
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2007</p>
 * <p>Company: 重庆科美达电脑有限公司</p>
 * @author not attributable
 * @version 1.0
 */
public class DataManager {
  /**
   * 默认构造符
   */
  public DataManager() {}


  /**
   * 新增一个数据对象信息
   * @param dataInfo DataInfo 数据对象信息
   * @throws Exception
   */
  public void addDataInfo(DataInfo dataInfo) throws Exception {
    Connection cn = null;
    PreparedStatement ps = null;
    ResultSet rs = null;
    try {
      cn = DBConnection.getConnection();
      dataInfo.setOid(SequenceProducer.getId());
      ps = cn.prepareStatement(
          "INSERT INTO DataInfo(OId, TId, CName, EName, Operator, CreateTime, "
          + "LastModifyTime, Digest) VALUES(?,?,?,?,?,?,?,?)");
      ps.setLong(1, dataInfo.getOid());
      ps.setLong(2, dataInfo.getTid());
      ps.setString(3, dataInfo.getCname());
      ps.setString(4, dataInfo.getEname());
      ps.setString(5, dataInfo.getOperator());
      ps.setTimestamp(6, dataInfo.getCreateTime());
      if (dataInfo.getLastModifyTime() == null) {
        ps.setNull(7, Types.DATE);
      } else {
        ps.setTimestamp(7, dataInfo.getLastModifyTime());
      }
      if (dataInfo.getDigest() == null) {
        ps.setNull(8, Types.VARCHAR);
      } else {
        ps.setString(8, dataInfo.getDigest());
      }
      if (ps.executeUpdate() <= 0) {
        throw new Exception();
      }
      ArrayList attributeList = dataInfo.getAttributeList();
      for (int i = 0; i < attributeList.size(); i++) {
        AttributeInfo aInfo = (AttributeInfo) attributeList.get(i);
        if (aInfo.getType().equals(AttributeInfo.TYPE_BOOLEAN)) {
          ps = cn.prepareStatement(
              "INSERT INTO BooleanAttribute(OId, AId, Content) VALUES(?,?,?)");
          ps.setLong(1, dataInfo.getOid());
          ps.setLong(2, aInfo.getAid());
          ps.setBoolean(3, aInfo.getValue().equals("true") ? true : false);
          ps.executeUpdate();
          ps.close();
          ps = null;
        } else if (aInfo.getType().equals(AttributeInfo.TYPE_CHAR)) {
          ps = cn.prepareStatement(
              "INSERT INTO CharAttribute(OId, AId, Content) VALUES(?,?,?)");
          ps.setLong(1, dataInfo.getOid());
          ps.setLong(2, aInfo.getAid());
          ps.setString(3, aInfo.getValue());
          ps.executeUpdate();
          ps.close();
          ps = null;
        } else if (aInfo.getType().equals(AttributeInfo.TYPE_DOUBLE)) {
          ps = cn.prepareStatement(
              "INSERT INTO DoubleAttribute(OId, AId, Content) VALUES(?,?,?)");
          ps.setLong(1, dataInfo.getOid());
          ps.setLong(2, aInfo.getAid());
          ps.setDouble(3, Double.parseDouble(aInfo.getValue()));
          ps.executeUpdate();
          ps.close();
          ps = null;
        } else if (aInfo.getType().equals(AttributeInfo.TYPE_INT)) {
          ps = cn.prepareStatement(
              "INSERT INTO IntegerAttribute(OId, AId, Content) VALUES(?,?,?)");
          ps.setLong(1, dataInfo.getOid());
          ps.setLong(2, aInfo.getAid());
          ps.setLong(3, Long.parseLong(aInfo.getValue()));
          ps.executeUpdate();
          ps.close();
          ps = null;
        } else if (aInfo.getType().equals(AttributeInfo.TYPE_TEXT)) {
          ps = cn.prepareStatement(
              "INSERT INTO ClobAttribute(OId, AId, Content) VALUES(?,?,?)");
          ps.setLong(1, dataInfo.getOid());
          ps.setLong(2, aInfo.getAid());
          ps.setLong(3, Long.parseLong(aInfo.getValue()));
          ps.executeUpdate();
          ps.close();
          ps = null;
        }
      }
    } catch (Exception ex) {
      if (Debug.isJavaBeanDebug) {
        ex.printStackTrace();
      }
      throw ex;
    } finally {
      try {if (rs != null) {rs.close();
      rs = null;
      }
      } catch (Exception ex) {}
      try {if (ps != null) {ps.close();
      ps = null;
      }
      } catch (Exception ex) {}
      try {if (cn != null) {cn.close();
      cn = null;
      }
      } catch (Exception ex) {}
    }
  }


  /**
   * 修改一个数据对象信息，包括他的基本信息以及属性信息
   * @param dataInfo DataInfo 数据对象信息
   * @throws Exception
   */
  public void modifyDataInfo(DataInfo dataInfo) throws Exception {
    Connection cn = null;
    PreparedStatement ps = null;
    ResultSet rs = null;
    try {
      cn = DBConnection.getConnection();
      cn.setAutoCommit(false);
      ps = cn.prepareStatement(
          "UPDATE DataInfo SET CName = ?, EName = ?, LastModifyTime = ?,"
          + " Digest = ? WHERE OId = ?");
      ps.setString(1, dataInfo.getCname());
      ps.setString(2, dataInfo.getEname());
      ps.setTimestamp(3, new Timestamp(System.currentTimeMillis()));
      ps.executeUpdate();
      ps.close();
      ps = null;
      ArrayList attributeList = dataInfo.getAttributeList();
      for (int i = 0; i < attributeList.size(); i++) {
        AttributeInfo aInfo = (AttributeInfo) attributeList.get(i);
        if (aInfo.getType().equals(AttributeInfo.TYPE_BOOLEAN)) {
          ps = cn.prepareStatement(
              "UPDATE BooleanAttribute SET Content = ? WHERE OId = ? AND AId = ?");
          ps.setBoolean(1, aInfo.getValue().equals("true") ? true : false);
          ps.setLong(2, aInfo.getOid());
          ps.setLong(3, aInfo.getAid());
          ps.executeUpdate();
          ps.close();
          ps = null;
        } else if (aInfo.getType().equals(AttributeInfo.TYPE_CHAR)) {
          ps = cn.prepareStatement(
              "UPDATE CharAttribute SET Content = ? WHERE OId = ? AND AId = ?");
          ps.setString(1, aInfo.getValue());
          ps.setLong(2, aInfo.getOid());
          ps.setLong(3, aInfo.getAid());
          ps.executeUpdate();
          ps.close();
          ps = null;
        } else if (aInfo.getType().equals(AttributeInfo.TYPE_DOUBLE)) {
          ps = cn.prepareStatement(
              "UPDATE DoubleAttribute SET Content = ? WHERE OId = ? AND AId = ?");
          ps.setDouble(1, Double.parseDouble(aInfo.getValue()));
          ps.setLong(2, aInfo.getOid());
          ps.setLong(3, aInfo.getAid());
          ps.executeUpdate();
          ps.close();
          ps = null;
        } else if (aInfo.getType().equals(AttributeInfo.TYPE_INT)) {
          ps = cn.prepareStatement(
              "UPDATE DoubleAttribute SET Content = ? WHERE OId = ? AND AId = ?");
          ps.setLong(1, Long.parseLong(aInfo.getValue()));
          ps.setLong(2, aInfo.getOid());
          ps.setLong(3, aInfo.getAid());
          ps.executeUpdate();
          ps.close();
          ps = null;
        } else if (aInfo.getType().equals(AttributeInfo.TYPE_TEXT)) {
          ps = cn.prepareStatement(
              "UPDATE DoubleAttribute SET Content = ? WHERE OId = ? AND AId = ?");
          ps.setString(1, aInfo.getValue());
          ps.setLong(2, aInfo.getOid());
          ps.setLong(3, aInfo.getAid());
          ps.executeUpdate();
          ps.close();
          ps = null;
        }
      }
      cn.commit();
      cn.setAutoCommit(true);
    } catch (Exception ex) {
      if (Debug.isJavaBeanDebug) {
        ex.printStackTrace();
      }
      try {
        if (cn != null && !cn.getAutoCommit()) {
          cn.rollback();
          cn.setAutoCommit(true);
        }
      } catch (Exception e) {}
      throw ex;
    } finally {
      try {if (rs != null) {rs.close();
      rs = null;
      }
      } catch (Exception ex) {}
      try {if (ps != null) {ps.close();
      ps = null;
      }
      } catch (Exception ex) {}
      try {if (cn != null) {cn.close();
      cn = null;
      }
      } catch (Exception ex) {}
    }
  }


  /**
   * 删除一条数据对象信息
   * @param oid long 数据对象编号
   * @return int 被删除的数据对象信息的数量
   * @throws Exception
   */
  public int deleteDataInfo(long oid) throws Exception {
    Connection cn = null;
    PreparedStatement ps = null;
    ResultSet rs = null;
    int deleteNum = 0;
    try {
      cn = DBConnection.getConnection();
      cn.setAutoCommit(false);
      deleteNum = deleteDataInfo(oid, cn);
      cn.commit();
      cn.setAutoCommit(true);
    } catch (Exception ex) {
      if (Debug.isJavaBeanDebug) {
        ex.printStackTrace();
      }
      if (cn != null && !cn.getAutoCommit()) {
        cn.rollback();
        cn.setAutoCommit(true);
      }
    } finally {
      try {if (rs != null) {rs.close();
      rs = null;
      }
      } catch (Exception ex) {}
      try {if (ps != null) {ps.close();
      ps = null;
      }
      } catch (Exception ex) {}
      try {if (cn != null) {cn.close();
      cn = null;
      }
      } catch (Exception ex) {}
    }
    return deleteNum;
  }


  /**
   * 删除一部分数据对象信息
   * @param oid long[] 将被删除的数据对象编号
   * @return int 被删除的数据对象信息的数量
   * @throws Exception
   */
  public int deleteDataInfo(long[] oid) throws Exception {
    Connection cn = null;