format.java

使用tomcat或者struts的数据库连接池

package format;

import java.io.*;
import javax.servlet.http.HttpServletResponse;


public class Format {

    public static String getChineseStr(String str){
        try{
            String temp_p=str;
            byte[] temp_t=temp_p.getBytes("ISO8859-1");
            String temp=new String(temp_t,"GBK");
            return temp;
        }catch(Exception e){
            return null;
        }
    }

    public static String getAscStr(String str){
        try{
            String temp_p=str;
            byte[] temp_t=temp_p.getBytes("GBK");
            String temp=new String(temp_t,"ISO8859-1");
            return temp;
        }catch(Exception e){
            return null;
        }
    }

    public static String getReplaceStr(String str){
        if (str==null)
            return null;
        else
            return str.replaceAll("'","''");
    }

    //对字符串加密
    public  static String  pass(String  s){
        int num=s.length();
        char[] a=new char[num];
        char[] b=new char[num];
        a=s.toCharArray();
        for (int i=0;i<=num-1;i++){
            b[i]=(char)((~(int)a[i])-128);
        }
        return (new String(b));
    }
    public static String unpass(String s){
        int num=s.length();
        char[] a=new char[num];
        a=s.toCharArray();
        for (int i=0;i<=num-1;i++)
            a[i]=(char)(~((int)a[i]+128));
        return (new String(a));
    }
    public static String StampToDate(String str){
        StringBuffer output = new StringBuffer();
        output.append(str.substring(0,4));
        output.append("-");
        output.append(str.substring(4,6));
        output.append("-");
        output.append(str.substring(6,8));
        output.append("  ");
        output.append(str.substring(8,10));
        output.append(":");
        output.append(str.substring(10,12));
        output.append(":");
        output.append(str.substring(12,14));
        return output.toString();
    }

    public  void download(String filename,HttpServletResponse response){
        int start=filename.lastIndexOf("/");
        String realName=filename.substring(start+1,filename.length());
        //下载
        try{
            java.io.BufferedInputStream bis=null;
            java.io.BufferedOutputStream bos=null;
            response.setContentType("application/x-msdownload");
            response.setHeader("Content-disposition","attachment; filename="+realName);
            //jcifs.smb.SmbFile f = new jcifs.smb.SmbFile("smb://sun:sun@"+filename);
            //jcifs.smb.SmbFileInputStream file = new jcifs.smb.SmbFileInputStream(f);
            java.io.File f =new java.io.File(filename);
            java.io.FileInputStream file=new java.io.FileInputStream(f);
            bis=new java.io.BufferedInputStream(file);
            bos=new java.io.BufferedOutputStream(response.getOutputStream());
            byte[] buffer = new byte[2048];
            int bytesRead=0;
            while (-1!=(bytesRead=bis.read(buffer,0,buffer.length))){
                bos.write(buffer,0,bytesRead);
            }
            bos.close();
            bis.close();
        }catch(Exception ex) {
        }
    }


}