擅用異常處理try catch(java-unrar-0.3.jar)

已經不是第一次遇到這種事情了，所以很想寫點什麼。

今天看到一段別人寫的java代碼，只是一個解壓的方法。

實際有用代碼很少，大概不到30行

但是！裏面居然有6個try！最讓我無法理解的，是在方法最後還有一句flage=true

下面是代碼(需要java-unrar-0.3.jar包的給我留言，我百度Hi在工作日都在線)

===============================Code================================

package com.test;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import de.innosystec.unrar.Archive;
import de.innosystec.unrar.exception.RarException;
import de.innosystec.unrar.rarfile.FileHeader;

public class Test {
/**
* * 解壓縮rar文件 *
*
* @param rarFileName
* @param extPlace
*/
public static boolean decompressionRarFiles(String rarFileName,
String extPlace) {
boolean flag = false;
Archive archive = null;
File out = null;
File file = null;
File dir = null;
FileOutputStream os = null;
FileHeader fh = null;
String path, dirPath = "";
try {
file = new File(rarFileName);
archive = new Archive(file);
} catch (RarException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
} finally {
if (file != null) {
file = null;
}
}
if (archive != null) {
try {
fh = archive.nextFileHeader();
while (fh != null) {
path = (extPlace + fh.getFileNameString().trim())
.replaceAll("\\\\", "/");
int end = path.lastIndexOf("/");
if (end != -1) {
dirPath = path.substring(0, end);
}
try {
dir = new File(dirPath);
if (!dir.exists()) {
dir.mkdirs();
}
} catch (RuntimeException e1) {
e1.printStackTrace();
} finally {
if (dir != null) {
dir = null;
}
}
if (fh.isDirectory()) {
fh = archive.nextFileHeader();
continue;
}
out = new File(extPlace + fh.getFileNameString().trim());
try {
os = new FileOutputStream(out);
archive.extractFile(fh, os);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (RarException e) {
e.printStackTrace();
} finally {
if (os != null) {
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (out != null) {
out = null;
}
}
fh = archive.nextFileHeader();
}
} catch (RuntimeException e) {
e.printStackTrace();
} finally {
fh = null;
if (archive != null) {
try {
archive.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
flag = true;
}
return flag;
}

public static void main(String[] args) {
String absPath = "E:\\temp\\111.rar";
// 文件絕對目錄
String toPath = "E:\\temp\\";
// 文件目錄
boolean flag = new Test().decompressionRarFiles(absPath, toPath);
System.out.println("flag ---" + flag);
}

}