通過jlha壓縮檔

　　應鬼子要求，壓縮檔。編寫ｊａｖａ類。

　　需要的ｊａｒ包：ｊｌｈａ．ｊａｒ

　　具體需求的類：

　　import jp.gr.java_conf.dangan.util.lha.LhaHeader;

　　import jp.gr.java_conf.dangan.util.lha.LhaOutputStream;

 

　　代碼和注釋如下：

/* * DirectoryZip.java * * Created on 2008.7.8, pm4:48 * * To change this template, choose Tools | Template Manager * and open the template in the editor. */package mail;import java.io.InputStream;import java.io.OutputStream;import oracle.sql.*;import java.util.List;import java.sql.Blob;import jp.gr.java_conf.dangan.util.lha.LhaHeader;import jp.gr.java_conf.dangan.util.lha.LhaOutputStream;/** * * @author user */public class DirectoryZip {    //壓縮檔，不一定要求是blob，只要是能提供輸出資料流就行    public static BLOB zip(BLOB blob,String filename)    throws Exception {        BLOB returnBlob = blob;//重點在於blob的輸出資料流        OutputStream returnStream = returnBlob.getBinaryOutputStream();        LhaOutputStream out = new LhaOutputStream(returnStream);//壓縮聲明        out.putNextEntry(new LhaHeader(filename));        InputStream in = blob.getBinaryStream();        int b;        while ((b = in.read()) != -1) {//壓縮過程            out.write(b);        }        out.close();        in.close();        return returnBlob;    }    //把字串轉化成流壓縮    public static BLOB zipStringToBlob(String instring,String filename)    throws Exception {        /*LhaOutputStream out = new LhaOutputStream(returnBLob.getBinaryOutputStream());        out.putNextEntry(new LhaHeader(filename));        byte[] bytes = instring.getBytes();        int b;        for(int i=0;i