dbconnectionbean.java

jsp

//DBConnectionBean.java
//用在servlet里的数据库桥接bean
import java.util.*;
import java.sql.*;
import java.io.*;

public class DBConnectionBean{
	Connection dbcon=null;
	Statement stmt=null;
	ResultSet result=null;
	String driver="";
	String url="";
	String user="";
	String password="";

	public DBConnectionBean(){
		try{
			InputStream fis =getClass().getResourceAsStream("jdbcsql.properties");
			Properties  ps=new Properties();
			ps.load(fis);
			driver=ps.getProperty("driver");
			url=ps.getProperty("url");
			user=ps.getProperty("username");
			password=ps.getProperty("password");
		}
		catch(Exception e){
			System.out.println(e);
		}

				try{
					Class.forName(this.driver);
					System.out.println("加载数据驱动成功!");
				}catch(ClassNotFoundException e){
					System.out.println("jdbc driver error");
		           }
	}
	public Connection openConnection(){
		try{
			this.dbcon=DriverManager.getConnection(this.url,this.user,this.password);
			System.out.println("桥接数据库成功!");
		}catch(SQLException e2){
			System.out.println(e2);
		}
		return dbcon;
	}
	public ResultSet executeQuery(String query)throws SQLException{
		this.stmt=dbcon.createStatement();
		this.result=stmt.executeQuery(query);
		return result;
	}

	public void executeUpdate(String query)throws SQLException{
		this.stmt=dbcon.createStatement();
		stmt.executeUpdate(query);
		if(stmt!=null) stmt.close();
	}
	public String getData(int index) throws SQLException{
		return result.getString(index);
	}
	public int getIntData(int index) throws SQLException{
		return result.getInt(index);
	}
	public float getFltData(int index) throws SQLException{
		return result.getFloat(index);
	}
	public boolean next() throws SQLException{
		return result.next();
	}
	public void resetResult() throws SQLException{
		this.result=null;
	}
	public void close() throws SQLException{
		if(dbcon!=null) dbcon.close();
		if(stmt!=null) stmt.close();
		if(result!=null) result.close();
	}
	public void finalize() throws Throwable{
		this.close();
	}
	public String replaceString(String str){

		char tempArray[]=str.toCharArray();

		int iCurr[]=new int[10];

		int j=0;

		for(int i=0;i!=tempArray.length;i++)
		{
			int temp=(int)tempArray[i];
			if(temp==92){
				iCurr[j]=i;
				j++;

			}
		}

		final int temp2=j+1;

		String strArray[]=new String[temp2];


		strArray[0]=str.substring(0,iCurr[0]);
		strArray[temp2-1]=str.substring(iCurr[j-1]+1);

		for(int m=1;m!=strArray.length-1;m++){
			strArray[m]=str.substring(iCurr[m-1]+1,iCurr[m]);
		}
		str="";
		for(int k=0;k!=strArray.length-1;k++){
			str=str+strArray[k]+"%5C";
		}
		str=str+strArray[temp2-1];
		return str;
	}

}