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1
6
7 package org.jfox.ioc.util;
8
9 import java.io.File  ;
10 import java.io.FileInputStream ;
11 import java.io.FileOutputStream ;
12 import java.io.IOException ;
13 import java.io.OutputStream ;
14 import java.net.URL ;
15 import java.net.URLClassLoader ;
16 import java.util.ArrayList ;
17 import java.util.List ;
18 import java.util.StringTokenizer ;
19 import java.util.jar.Attributes ;
20 import java.util.jar.JarFile ;
21 import java.util.jar.JarInputStream ;
22 import java.util.jar.Manifest ;
23 import java.util.zip.ZipEntry ;
24
25
28
29 public class JarUtils {
30
31
34 public static void extract(File jarFile, File dest) throws IOException {
35 if(!dest.exists()) {
36 dest.mkdirs();
37 }
38 if(!dest.isDirectory()) {
39 throw new IOException ("Destination must be a directory.");
40 }
41 JarInputStream jin = new JarInputStream (new FileInputStream (jarFile));
42 byte[] buffer = new byte[1024];
43
44 ZipEntry entry = jin.getNextEntry();
45 while(entry != null) {
46 String fileName = entry.getName();
47 if(fileName.charAt(fileName.length() - 1) == '/') {
48 fileName = fileName.substring(0, fileName.length() - 1);
49 }
50 if(fileName.charAt(0) == '/') {
51 fileName = fileName.substring(1);
52 }
53 if(File.separatorChar != '/') {
54 fileName = fileName.replace('/', File.separatorChar);
55 }
56 File file = new File (dest, fileName);
57 if(entry.isDirectory()) {
58 file.mkdirs();
60 jin.closeEntry();
61 }
62 else {
63 File parent = file.getParentFile();
65 if(parent != null && !parent.exists()) {
66 parent.mkdirs();
67 }
68
69 OutputStream out = new FileOutputStream (file);
71 int len = 0;
72 while((len = jin.read(buffer, 0, buffer.length)) != -1) {
73 out.write(buffer, 0, len);
74 }
75 out.flush();
76 out.close();
77 jin.closeEntry();
78 file.setLastModified(entry.getTime());
79 }
80 entry = jin.getNextEntry();
81 }
82
85 Manifest mf = jin.getManifest();
86 if(mf != null) {
87 File file = new File (dest, "META-INF/MANIFEST.MF");
88 File parent = file.getParentFile();
89 if(parent.exists() == false) {
90 parent.mkdirs();
91 }
92 OutputStream out = new FileOutputStream (file);
93 mf.write(out);
94 out.flush();
95 out.close();
96 }
97 jin.close();
98 }
99
100
107 public static URL getDescriptor(URLClassLoader loader, String descriptorName) {
108 return loader.findResource(descriptorName);
109 }
110
111 public static Manifest getManifest(File jarFile) throws IOException {
112 return new JarFile (jarFile).getManifest();
113 }
114
115 public static String [] getClassPathFromManifest(File jarFile) throws IOException {
116 Manifest mani = getManifest(jarFile);
117 Attributes attrs = mani.getMainAttributes();
118 String cpString = attrs.getValue("Class-Path");
119 if(cpString == null || cpString.trim().equals("")) {
120 return new String [0];
121 }
122 else {
123 StringTokenizer st = new StringTokenizer (cpString);
124 List cpList = new ArrayList ();
125 while(st.hasMoreTokens()) {
126 cpList.add(st.nextToken());
127 }
128 return (String []) cpList.toArray(new String [cpList.size()]);
129 }
130 }
131
132 public static void main(String [] args) {
133
134 }
135 }
136
137
138
139 |
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