中文亂碼解壓

用過java做壓縮或解壓的都知道，jdk提供的zip只能按UTF-8格式處理，前些天寫過一篇壓縮zip的中文問題，就是使用ant包裏的類，並且在linux上稍做些修改也能兼容，但是，如果是解壓一個包含中文文件名的zip包呢？此時如果使用jdk自帶的zip包，解壓時如果文件名有中文，會抱非法參數異常，而如果使用ant包。會發現ant.jar裏並沒有ZipInputStream，怎麼辦？
看來，我們還是得使用jdk裏的zip包了，我們的問題僅僅是需要支持GBK,所以修改應該不會很大，所以我們先找出所有相關的類,以下類請自行從jdk的src.zip裏提取

Java代碼

DeflaterOutputStream.java
InflaterInputStream.java
ZipConstants.java
ZipEntry.java
ZipInputStream.java
ZipOutputStream.java

DeflaterOutputStream.java
InflaterInputStream.java
ZipConstants.java
ZipEntry.java
ZipInputStream.java
ZipOutputStream.java

以上java文件我已打包在附件中.

前面不是說ant.jar裏並沒有ZipInputStream.java嘛，這裏需要修改的正是這個類，找到getUTF8String()方法，。（這裏要汗一個，。sun是怎麼想的，連方法名都規定死了是UTF-8），在這個方法裏的所有代碼前加上如下:

Java代碼

try
{
String s = new String(b, off, len, "GBK");//以GBK的方式
return s;
}
catch (UnsupportedEncodingException e)
{
e.printStackTrace();
}

 try
        {
            String s = new String(b, off, len, "GBK");//以GBK的方式
            return s;
        }
        catch (UnsupportedEncodingException e)
        {
            e.printStackTrace();
        }

此時就完成以GBK方式操作，但是此時我們在解壓時，還會發現問題，報如下異常:

Java代碼

Exception in thread "main" java.lang.UnsatisfiedLinkError: com.zwl.zip.ZipEntry.initIDs()V
at com.zwl.zip.ZipEntry.initIDs(Native Method)
at com.zwl.zip.ZipEntry.<clinit>(ZipEntry.java:41)
at com.zwl.zip.ZipInputStream.createZipEntry(ZipInputStream.java:389)
at com.zwl.zip.ZipInputStream.readLOC(ZipInputStream.java:251)
at com.zwl.zip.ZipInputStream.getNextEntry(ZipInputStream.java:78)
at com.conngame.test.TestZip.unzip(TestZip.java:41)
at com.conngame.test.TestZip.main(TestZip.java:100)

Exception in thread "main" java.lang.UnsatisfiedLinkError: com.zwl.zip.ZipEntry.initIDs()V
	at com.zwl.zip.ZipEntry.initIDs(Native Method)
	at com.zwl.zip.ZipEntry.<clinit>(ZipEntry.java:41)
	at com.zwl.zip.ZipInputStream.createZipEntry(ZipInputStream.java:389)
	at com.zwl.zip.ZipInputStream.readLOC(ZipInputStream.java:251)
	at com.zwl.zip.ZipInputStream.getNextEntry(ZipInputStream.java:78)
	at com.conngame.test.TestZip.unzip(TestZip.java:41)
	at com.conngame.test.TestZip.main(TestZip.java:100)

initIDs（）方法是在ZipEntry類的static裏調用的，目前還不大清楚這個到底做什麼用，我們只需要在ZipEntry類中找到這個static模塊，註釋掉就行了,

Java代碼

static
{
/* Zip library is loaded from System.initializeSystemClass */
initIDs();
}

 static
    {
        /* Zip library is loaded from System.initializeSystemClass */
        initIDs();
    }

找到以上代碼註釋掉.此時解壓，OK，能完美支持中文

附上測試代碼:

Java代碼

package com.conngame.test;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import com.zwl.zip.ZipEntry;
import com.zwl.zip.ZipInputStream;
import com.zwl.zip.ZipOutputStream;
/**
* TestZip.java coding by Serol Luo. [email protected] 2003/07/03
* http://www.chinaunix.net/forum/viewforum.php?f=26 轉載請保留此信息
*/
class TestZip
{
public void zip(String zipFileName, String inputFile) throws Exception
{
zip(zipFileName, new File(inputFile));
}
public void zip(String zipFileName, File inputFile) throws Exception
{
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(
zipFileName));
zip(out, inputFile, "");
System.out.println("zip done");
out.close();
}
public void unzip(String zipFileName, String outputDirectory)
throws Exception
{
ZipInputStream in = new ZipInputStream(new FileInputStream(zipFileName));
ZipEntry z;
// System.out.println("z = in.getNextEntry(): "+((z=in.getNextEntry())!=null));
while ((z=in.getNextEntry())!=null)
{
System.out.println("unziping " + z.getName());
if (z.isDirectory())
{
String name = z.getName();
name = name.substring(0, name.length() - 1);
File f = new File(outputDirectory + File.separator + name);
f.mkdir();
System.out.println("mkdir " + outputDirectory + File.separator
+ name);
}
else
{
File f = new File(outputDirectory + File.separator
+ z.getName());
f.createNewFile();
System.out.println("f:" +f);
FileOutputStream out = new FileOutputStream(f);
int b;
while ((b = in.read()) != -1)
out.write(b);
out.close();
}
}
in.close();
}
public void zip(ZipOutputStream out, File f, String base) throws Exception
{
System.out.println("Zipping " + f.getName());
if (f.isDirectory())
{
File[] fl = f.listFiles();
out.putNextEntry(new ZipEntry(base + "/"));
base = base.length() == 0 ? "" : base + "/";
for (int i = 0; i < fl.length; i++)
{
zip(out, fl[i], base + fl[i].getName());
}
}
else
{
out.putNextEntry(new ZipEntry(base));
FileInputStream in = new FileInputStream(f);
int b;
while ((b = in.read()) != -1)
out.write(b);
in.close();
}
}
public static void main(String[] args)
{
try
{
TestZip t = new TestZip();
t.unzip("D:\\program\\servers\\apache-tomcat-6.0.9\\apache-tomcat-6.0.9\\webapps\\Manage\\xxx.zip", "D:\\program\\servers\\apache-tomcat-6.0.9\\apache-tomcat-6.0.9\\webapps\\Manage\\");
}
catch (Exception e)
{
e.printStackTrace(System.out);
}
}
}

package com.conngame.test;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

import com.zwl.zip.ZipEntry;
import com.zwl.zip.ZipInputStream;
import com.zwl.zip.ZipOutputStream;

/**
 * TestZip.java coding by Serol Luo. [email protected] 2003/07/03
 * http://www.chinaunix.net/forum/viewforum.php?f=26 轉載請保留此信息
 */

class TestZip
{
    public void zip(String zipFileName, String inputFile) throws Exception
    {
        zip(zipFileName, new File(inputFile));
    }
    public void zip(String zipFileName, File inputFile) throws Exception
    {
        ZipOutputStream out = new ZipOutputStream(new FileOutputStream(
                zipFileName));
        zip(out, inputFile, "");
        System.out.println("zip done");
        out.close();
    }

    public void unzip(String zipFileName, String outputDirectory)
            throws Exception
    {
        ZipInputStream in = new ZipInputStream(new FileInputStream(zipFileName));
        ZipEntry z;
        
//        System.out.println("z = in.getNextEntry(): "+((z=in.getNextEntry())!=null));
        
        
        
        while ((z=in.getNextEntry())!=null)
        {
            System.out.println("unziping " + z.getName());
            if (z.isDirectory())
            {
                String name = z.getName();
                name = name.substring(0, name.length() - 1);
                File f = new File(outputDirectory + File.separator + name);
                f.mkdir();
                System.out.println("mkdir " + outputDirectory + File.separator
                        + name);
            }
            else
            {
                File f = new File(outputDirectory + File.separator
                        + z.getName());
                f.createNewFile();
                System.out.println("f:" +f);
                FileOutputStream out = new FileOutputStream(f);
                int b;
                while ((b = in.read()) != -1)
                    out.write(b);
                out.close();
            }
        }

        in.close();
    }

    public void zip(ZipOutputStream out, File f, String base) throws Exception
    {
        System.out.println("Zipping  " + f.getName());
        if (f.isDirectory())
        {
            File[] fl = f.listFiles();
            out.putNextEntry(new ZipEntry(base + "/"));
            base = base.length() == 0 ? "" : base + "/";
            for (int i = 0; i < fl.length; i++)
            {
                zip(out, fl[i], base + fl[i].getName());
            }
        }
        else
        {
            out.putNextEntry(new ZipEntry(base));
            FileInputStream in = new FileInputStream(f);
            int b;
            while ((b = in.read()) != -1)
                out.write(b);
            in.close();
        }

    }
    public static void main(String[] args)
    {
        try
        {
            TestZip t = new TestZip();
            t.unzip("D:\\program\\servers\\apache-tomcat-6.0.9\\apache-tomcat-6.0.9\\webapps\\Manage\\xxx.zip", "D:\\program\\servers\\apache-tomcat-6.0.9\\apache-tomcat-6.0.9\\webapps\\Manage\\");
        }
        catch (Exception e)
        {
            e.printStackTrace(System.out);
        }
    }
}

最好對傳入的輸出路徑做判斷，另外

File f = new File(outputDirectory + File.separator + z.getName());
System.out.println(f.getAbsolutePath());
if(!f.getParentFile().exists()){
f.getParentFile().mkdirs();
}
f.createNewFile();

/*initIDs();*/ 也要註釋掉。
static {
/* Zip library is loaded from System.initializeSystemClass */
/*initIDs();*/
}