📄 database.java
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/**********************************************************
Copyright (C),2003-10-12, Beijing USTB.
All rights reserved.
Filename: Datebase.java
Author: 刘中兵
Version 1.0
Date:2003-10-12
Description:此文件为数据库的基本操作处理类
Other:
Variable List:
1.Connection conn = null;//数据库连接对象
Function List:
//基本操作
1.public DataBase()//构造函数
2.public void getConnPool()//取得连接池
3.public void createConn(String url,String usr,String pwd)//生成Oracle SQLServer等的连接
4.public void createConn(String url)//生成Access连接
5.public void releaseConn()//释放数据库连接
6.public ResultSet QuerySQL(String sql)//查询记录
7.public int ExecuteSQL(String sql)//执行增删改的语句
//辅助使用函数
8.public int makeID(String table,String field1,String field2,String value1,boolean type1)//产生唯一编号,type1为false时表示条件字段为字符串类型
public int makeID(String table,String field1,String field2,String field3,String value1,String value2,boolean type1,boolean type2)
public int makeID_Add1(String table,String field1,String field2,String value1,boolean type1)//产生唯一编号,type1为false时表示条件字段为字符串类型
public int makeID_Add1(String table,String field1,String field2,String field3,String value1,String value2,boolean type1,boolean type2)
9.public int toID(String table,String field1,String field2,String value1)//将名称转换为编号
10.public String toName(String table,String field1,String field2,String value)//将编号转换为名称
11.public Vector (String sql,int page,int records)//分页时取得一页的数据量
12.public int setSort(String table,String field1,String field2,String wherestr,String orderstr,boolean b)//为某一个字段进行重新排序
//查询与更新LOB类型
13.public String QueryCLOB(String table,String wherestr,String clobfield)//查询CLOB类型值
14.public int UpdateCLOB(String table,String wherestr,String blobfield,String blobvalue)//修改CLOB类型值
15.public String QueryBLOB(String table,String wherestr,String blobfield)//查询BLOB类型值
16.public int UpdateBLOB(String table,String wherestr,String blobfield,String blobvalue)//修改BLOB类型值
17.public String QueryBLOB_JNDI(String table,String wherestr,String blobfield)//查询BLOB类型值
178.public int UpdateBLOB_JNDI(String table,String wherestr,String blobfield,String blobvalue)//修改BLOB类型值
//LOB类型基本操作（到文件）
19.public int clobInsert(String sql,String table,String wherestr,String clobfield,String infile)//往数据库中插入一个新的CLOB对象
20.public int clobModify(String table,String wherestr,String clobfield,String infile)//修改CLOB对象（是在原CLOB对象基础上进行覆盖式的修改）
21.public int clobReplace(String table,String wherestr,String clobfield,String infile)//替换CLOB对象（将原CLOB对象清除，换成一个全新的CLOB对象）
22.public int blobInsert(String sql,String table,String wherestr,String blobfield,String infile)//往数据库中插入一个新的BLOB对象
23.public int blobModify(String table,String wherestr,String blobfield,String infile)//修改BLOB对象（是在原BLOB对象基础上进行覆盖式的修改）
24.public int blobReplace(String table,String wherestr,String blobfield,String infile)//替换BLOB对象（将原BLOB对象清除，换成一个全新的BLOB对象）
//数据库结构信息
25.public Hashtable getDataBaseInfo()//数据库信息
26;public Vector getTableList()//数据表列表
27.public Vector getTableStruct(String table)//数据表的结构
28.public Vector getResultSetData(ResultSet rs)//取得数据集内容
//对sql语句的分布处理
29.public void prepareStatement(String sql)//创建申明对象
30.public void executeQuery()//执行查询
31.public boolean next()//转向下一条
32.public String getObject(String field,String sqlType)//取得数据并根据数据类型转化为字符串
33.public void setObject(int index,String value,String sqlType)//根据数据类型保存到数据库
34.public void executeUpdate()//执行更新
35.public void closePstm()//关闭申明对象
36.public void closeRs()//关闭游标
History:
date:2003-11-21
name:liumei
action:修改getOnePage(String sql,int page,int records)//分页时取得一页的数据量
每页的记录显示条数从字典中取,即去掉records的作用
***********************************************************/
package com.ideas.bean;
import java.util.*;
import java.text.*;
import java.sql.*;
import java.io.*;
import java.lang.*;
import javax.naming.*;
import oracle.jdbc.driver.OracleResultSet;
import oracle.sql.*;
import com.ideas.util.*;
/**
* 此文件为数据库的基本操作处理类
* @author 刘中兵
* @version 1.0-hg
*/
public class DataBase extends Object
{
Connection conn = null;
PreparedStatement pstm = null;
ResultSet rs = null;
DBConnectionManager connMgr = null;
/**构造函数*/
public DataBase()
{
}
/**取得连接池*/
public void getConnPool()
{
try
{
Context initCtx = new InitialContext();
Context ctx = (Context)initCtx.lookup("java:comp/env");
/**获取连接池对象*/
Object obj = (Object)ctx.lookup("jdbc/OracleDB");
/**类型转换*/
javax.sql.DataSource ds = (javax.sql.DataSource)obj;
conn = ds.getConnection();
/**测试连接计数*/
// ParentBean.curnum++;
// ParentBean.sumnum++;
ParentBean.showConnNUM(true);
}
catch(NamingException e)
{
System.out.println("从数据池取得数据库连接时出错;\r\n错误为:" + e);
}
catch(SQLException e)
{
System.out.println("从数据池取得数据库连接时出错;\r\n错误为:" + e);
}
}
/**创建我的连接池*/
public boolean getMyConnPool()
{
//Configuration.DB_URL = "jdbc:mysql://192.168.0.1:3306/yj";
//Configuration.DB_JDBCDRIVER = "org.gjt.mm.mysql.Driver";
connMgr = DBConnectionManager.getInstance();
conn = connMgr.getConnection(Configuration.ConnectionPoolName);
if(conn == null)
{
return false;
}
else
{
return true;
}
}
/**释放我的连接池*/
public boolean releaseMyConnPool()
{
connMgr.freeConnection(Configuration.ConnectionPoolName, conn);
return true;
}
/**生成Oracle SQLServer等的连接*/
public void createConn(String drv, String url, String usr, String pwd)
{
try
{
Class.forName(drv).newInstance();
conn = DriverManager.getConnection(url, usr, pwd);
/**测试连接计数*/
ParentBean.showConnNUM(true);
}
catch(ClassNotFoundException ec)
{
System.out.println("从自身建立数据库连接时出错;\r\n错误为:" + ec);
}
catch(SQLException e)
{
System.out.println("从自身建立数据库连接时出错;\r\n错误为:" + e);
}
catch(Exception et)
{
System.out.println("从自身建立数据库连接时出错;\r\n错误为:" + et);
}
}
/**生成Access连接*/
public void createConn(String drv, String url)
{
try
{
Class.forName(drv).newInstance();
conn = DriverManager.getConnection(url);
/**测试连接计数*/
ParentBean.showConnNUM(true);
}
catch(ClassNotFoundException ec)
{
System.out.println("从自身建立数据库连接时出错;\r\n错误为:" + ec);
}
catch(SQLException e)
{
System.out.println("从自身建立数据库连接时出错;\r\n错误为:" + e);
}
catch(Exception et)
{
System.out.println("从自身建立数据库连接时出错;\r\n错误为:" + et);
}
}
/**释放数据库连接*/
public void releaseConn()
{
try
{
if(conn != null)
{
conn.close();
/**测试连接计数*/
ParentBean.showConnNUM(false);
}
}
catch(SQLException e)
{
System.out.println("关闭数据库连接时出错;\r\n错误为:" + e);
}
}
/**查询记录*/
public ResultSet QuerySQL(String sql)
{
ResultSet rs = null;
try
{
pstm = conn.prepareStatement(sql);
rs = pstm.executeQuery();
}
catch(SQLException sqle)
{
System.out.println("调用SQL语句 " + sql + " 时出错;\r\n错误为:" + sqle);
}
return rs;
}
/**执行增删改的语句*/
public int ExecuteSQL(String sql)
{
try
{
boolean defaultCommit = conn.getAutoCommit();
conn.setAutoCommit(false);
pstm = conn.prepareStatement(sql);
pstm.executeUpdate();
conn.commit();
conn.setAutoCommit(defaultCommit);
pstm.close();
}
catch(SQLException sqle)
{
System.out.println("调用SQL语句 " + sql + " 时出错;\r\n错误为:" + sqle);
return sqle.getErrorCode();
}
return 0;
}
/**产生唯一编号*/
public int makeID(String table, String field1, String field2, String value1,
boolean type1)
{
int out = -1;
String sql = "";
try
{
//只有唯一主键field1
sql = "select " + field1 + " as ID from " + table + " order by " +
field1;
//有两个主键field1、field2
if(!value1.equals(""))
{ //当第一个字段不空时，作为条件查询第二个字段
sql = "select " + field2 + " as ID from " + table + " where " +
field1 +
"=" + value1 + " order by " + field2;
if(!type1)
{ //是字符串时 将type1设为false
sql = "select " + field2 + " as ID from " + table +
" where " +
field1 + "='" + value1 + "' order by " + field2;
}
}
pstm = conn.prepareStatement(sql);
rs = pstm.executeQuery();
int t1 = 1;
int t2 = 2;
if(rs.next())
{ //有记录
t1 = rs.getInt("ID");
out = t1;
boolean bool = false;
while(rs.next())
{ //不止一条纪录
bool = true;
t2 = rs.getInt("ID");
if((t2 - t1) > 1)
{
break; //如果t2与t1相差大于1,则跳出去,新编号为t1++（见后面**）
}
t1 = t2; //否则将t2赋给t1
}
if(!bool)
{ //如果只有一条纪录
if(t1 > 1)
{
t1 = 1; //如果已有纪录的ID号大于1，则新编号设为1
}
else
{
t1++;
}
}
else
{
t1++; //**
}
}
if(out > 1)
{
out = 1;
}
else
{
out = t1;
}
rs.close();
pstm.close();
}
catch(SQLException sqle)
{
System.out.println("调用SQL语句 " + sql + " 时出错;\r\n错误为:" + sqle);
}
return out;
}
/**产生唯一编号*/
public int makeID_Add1(String table, String field1, String field2,
String value1, boolean type1)
{
int out = -1;
String sql = "";
try
{
//只有唯一主键field1
sql = "select max(" + field1 + ")+1 as ID from " + table +
" order by " +
field1;
//有两个主键field1、field2
if(!value1.equals(""))
{ //当第一个字段不空时，作为条件查询第二个字段
sql = "select (" + field2 + ")+1 as ID from " + table +
" where " +
field1 + "=" + value1 + " order by " + field2;
if(!type1)
{ //是字符串时 将type1设为false
sql = "select (" + field2 + ")+1 as ID from " + table +
" where " +
field1 + "='" + value1 + "' order by " + field2;
}
}
pstm = conn.prepareStatement(sql);
rs = pstm.executeQuery();
if(rs.next())
{ //有记录
out = rs.getInt(1);
}
rs.close();
pstm.close();
}
catch(SQLException sqle)
{
System.out.println("调用SQL语句 " + sql + " 时出错;\r\n错误为:" + sqle);
}
return out;
}
public int makeID(String table, String field1, String field2, String field3,
String value1, String value2, boolean type1,
boolean type2)
{
int out = -1;
String sql = "";
try
{
//只有唯一主键field1
sql = "select " + field1 + " as ID from " + table + " order by " +
field1;
//有两个主键field1、field2
if(!value1.equals(""))
{ //当第一个字段不空时，作为条件查询第二个字段
sql = "select " + field2 + " as ID from " + table + " where " +
field1 +
"=" + value1 + " order by " + field2;
if(!type1)
{ //是字符串时 将type1设为false
sql = "select " + field2 + " as ID from " + table +
" where " +
field1 + "='" + value1 + "' order by " + field2;
}
}
if(!value2.equals(""))
{ //当第二个字段不空时，作为条件查询第三个字段
sql = "select " + field3 + " as ID from " + table + " where " +
field1 +
"=" + value1 + " and " + field2 + "=" + value2 +
" order by " +
field3;
if(!type2)
{ //是字符串时 将type1设为false
sql = "select " + field3 + " as ID from " + table +
" where " +
field1 + "='" + value1 + "' and " + field2 + "='" +
value2 +
"' order by " + field3;
}
}
pstm = conn.prepareStatement(sql);
rs = pstm.executeQuery();
int t1 = 1;
int t2 = 2;
if(rs.next())
{ //有记录
t1 = rs.getInt("ID");
out = t1;
boolean bool = false;
while(rs.next())
{ //不止一条纪录
bool = true;
t2 = rs.getInt("ID");
if((t2 - t1) > 1)
{
break; //如果t2与t1相差大于1,则跳出去,新编号为t1++（见后面**）
}
t1 = t2; //否则将t2赋给t1
}
if(!bool)
{ //如果只有一条纪录
if(t1 > 1)
{
t1 = 1; //如果已有纪录的ID号大于1，则新编号设为1
}
else
{
t1++;
}
}
else
{
t1++; //**
}
}
if(out > 1)
{
out = 1;
}
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