java 编程思想 Directory工具类

  1 package net.bigwrok;
  2 
  3 import java.io.File;
  4 import java.io.FilenameFilter;
  5 import java.io.IOException;
  6 import java.util.ArrayList;
  7 import java.util.Iterator;
  8 import java.util.List;
  9 import java.util.regex.Pattern;
 10 
 11 public class Directory_util {
 12     /*工具类 遍历当前目录的所有文件,可以查看所有 目录 ,以及文件
 13     
 14     */
 15     public static File[] local(File dir,final String reg){
 16         //遍历当前目录的文件
 17         return dir.listFiles(new FilenameFilter() {
 18             //文件名过滤器
 19             private Pattern p = Pattern.compile(reg);
 20             @Override
 21             public boolean accept(File dir, String name) {
 22                  System.out.println(dir+"  "+name);
 23                 return p.matcher(name).matches();
 24                 //ret name.endsWith("java");
 25             }
 26         });//return 
 27     }//local
 28 
 29         
 30     //遍历当前目录的文件
 31     public static File[] local(String path,final String reg){
 32         return local(new File(path),reg);
 33     }
 34     //内部类  files保存 所有文件的  dirs保存所有的目录
 35     public static class TreeInfo implements Iterable<File>{
 36         public List<File> files  =  new ArrayList<File>();
 37         public List<File> dirs  =  new ArrayList<File>();
 38         @Override
 39         public Iterator<File> iterator() {
 40             return files.iterator();
 41         }
 42         
 43         void addAll(TreeInfo other){
 44             files.addAll(other.files);
 45             dirs.addAll(other.dirs);
 46         }
 47         
 48         @Override
 49         public String toString() {
 50             // 格式化打印
 51             //return "dirs: " +dirs+"\n\nfiles: "+files;
 52             return "dirs: " +PPrint.pformat(dirs)+"\n\nfiles: "+PPrint.pformat(files);
 53         }
 54         
 55     }//静态内部类class TreeInfo  结束
 56     
 57     static TreeInfo recurseDirs(File startDir ,String reg){
 58         TreeInfo result = new TreeInfo();
 59         for (File item : startDir.listFiles()) {
 60             if (item.isDirectory()) {
 61                 //如果是目录,目录列表dirs增加 item,目录下面所有的文件都放进result
 62                 result.dirs.add(item);
 63                 result.addAll(recurseDirs(item,reg));
 64             }else {
 65                 if (startDir.getName().matches(reg)) {
 66                     // getName()获得文件名称,仅仅是文件名 不包括目录  如:xxxx.java
 67                     result.files.add(item);
 68                 }
 69             }
 70         }//for
 71         return result;
 72         
 73     }//recurseDirs 方法结束
 74    
    // walk 从当前目录一直遍历所有文件 75 public static TreeInfo walk(String start ,String reg){ 76 return recurseDirs(new File(start), reg); 77 } 78 79 80 public static TreeInfo walk(File start ,String reg){ 81 return recurseDirs( start , reg); 82 } 83 84 85 public static TreeInfo walk(String start ){ 86 return recurseDirs(new File(start), ".*"); 87 } 88 89 90 public static TreeInfo walk(File start ){ 91 return recurseDirs( start , ".*"); 92 } 93 94 95 96 public static void main(String[] args) throws IOException { 97 File test = new File("."); 98 System.out.println("绝对路径 "+test.getAbsolutePath()); 99 System.out.println("抽象路径 "+test.getCanonicalPath()); 100 TreeInfo str = walk( "D:\\dev2\\workspace\\seehope\\bigwork\\src\\com\\"); 101 System.out.println(str); 102 /* 103 files: [D:\dev2\workspace\seehope\bigwork\src\com\ColorChoseListener.java, 104 D:\dev2\workspace\seehope\bigwork\src\com\ReadImg.java, 105 D:\dev2\workspace\seehope\bigwork\src\com\TrueFrametest.java] 106 */ 107 108 TreeInfo str2 = walk( test); 109 System.out.println(str2); 110 111 /* 112 dirs: [.\.settings, .\bin, .\bin\c2, .\bin\com, .\bin\net, .\bin\net\bigwrok, .\src, .\src\c2, .\src\com, .\src\net, .\src\net\bigwrok] 113 114 files: [.\.classpath, .\.project, .\.settings\org.eclipse.jdt.core.prefs, .\bin\c2\Draw2.class, .\bin\c2\Drawing$1.class, .\bin\c2\Drawing.class, .\bin\c2\f.jpg, .\bin\c2\MymenuAdapter.class, .\bin\c2\MyMenuItemAction.class, .\bin\c2\MyStrokeAction.class, .\bin\c2\ShapeAndColor.class, .\bin\c2\TrueFrametest$1.class, .\bin\c2\TrueFrametest$2.class, .\bin\c2\TrueFrametest$3.class, .\bin\c2\TrueFrametest.class, .\bin\com\ColorChoseListener.class, .\bin\com\Draw2.class, .\bin\com\MymenuAdapter.class, .\bin\com\MyMenuItemAction.class, .\bin\com\MyStrokeAction.class, .\bin\com\ReadImg.class, .\bin\com\ShapeAndColor.class, .\bin\com\TrueFrametest$1.class, .\bin\com\TrueFrametest$2.class, .\bin\com\TrueFrametest$3.class, .\bin\com\TrueFrametest$4.class, .\bin\com\TrueFrametest.class, .\bin\net\bigwrok\Directory_util$1.class, .\bin\net\bigwrok\Directory_util$TreeInfo.class, .\bin\net\bigwrok\Directory_util.class, .\bin\net\bigwrok\InetAddrTest.class, .\bin\net\bigwrok\InetAddrTest2.class, .\bin\net\bigwrok\IO1.class, .\bin\net\bigwrok\Test2_net.class, .\bin\net\bigwrok\Test_net2.class, .\src\c2\Drawing.java, .\src\c2\f.jpg, .\src\c2\TrueFrametest.java, .\src\com\ColorChoseListener.java, .\src\com\ReadImg.java, .\src\com\TrueFrametest.java, .\src\net\bigwrok\Directory_util.java, .\src\net\bigwrok\InetAddrTest.java, .\src\net\bigwrok\InetAddrTest2.java, .\src\net\bigwrok\IO1.java, .\src\net\bigwrok\Test2_net.java, .\src\net\bigwrok\Test_net2.java] 115 116 */ 117 /* 118 for (File file : Directory_util.walk(".", ".*[Zz].*\\.java")) { 119 System.out.println(file); 120 } 121 walk(start,reg); 122 ".*[Zz].*\\.java" 文件以.java结尾 123 "T.*" T开头的任何文件 124 "T.*\\.java" T开头的.java文件 125 */ 126 } 127 128 129 130 }

 

打印工具类PPrint

 1 package net.bigwrok;
 2 
 3 import java.util.Arrays;
 4 import java.util.Collection;
 5 
 6 public class PPrint {
 7     
 8     
 9     
10     public static String pformat(Collection<?> c){ 
11         if (c.size() == 0) {
12             return "[]";
13         }
14         
15         StringBuilder res = new StringBuilder("[");
16         for (Object elem : c) {
17             if (c.size() != 1) {
18                 res.append("\n");
19             }
20             res.append(elem);
21         }//for
22 
23         if (c.size() != 1) {
24             res.append("\n");
25         }
26         res.append("]");
27         return res.toString();
28     }//pformat
29     
30     
31     public static void pprint(Collection<?> c){
32         System.out.println(pformat(c));
33     }
34 
35     
36     public static void pprint(Object[] c){
37         System.out.println(Arrays.asList(c));
38     }
39     
40     
41     
42     
43 
44 }

 

 

 

运行结果

files: [
.\.classpath
.\.project
.\.settings\org.eclipse.jdt.core.prefs
.\bin\c2\Draw2.class
.\bin\c2\Drawing$1.class
.\bin\c2\Drawing.class
.\bin\c2\f.jpg
.\bin\c2\MymenuAdapter.class
.\bin\c2\MyMenuItemAction.class
.\bin\c2\MyStrokeAction.class
.\bin\c2\ShapeAndColor.class
.\bin\c2\TrueFrametest$1.class
.\bin\c2\TrueFrametest$2.class
.\bin\c2\TrueFrametest$3.class
.\bin\c2\TrueFrametest.class
.\bin\com\ColorChoseListener.class
.\bin\com\Draw2.class
.\bin\com\MymenuAdapter.class
.\bin\com\MyMenuItemAction.class
.\bin\com\MyStrokeAction.class
.\bin\com\ReadImg.class
.\bin\com\ShapeAndColor.class
.\bin\com\TrueFrametest$1.class
.\bin\com\TrueFrametest$2.class
.\bin\com\TrueFrametest$3.class
.\bin\com\TrueFrametest$4.class
.\bin\com\TrueFrametest.class
.\bin\net\bigwrok\Directory_util$1.class
.\bin\net\bigwrok\Directory_util$TreeInfo.class
.\bin\net\bigwrok\Directory_util.class
.\bin\net\bigwrok\InetAddrTest.class
.\bin\net\bigwrok\InetAddrTest2.class
.\bin\net\bigwrok\IO1.class
.\bin\net\bigwrok\IO2.class
.\bin\net\bigwrok\PPrint.class
.\bin\net\bigwrok\Test2_net.class
.\bin\net\bigwrok\Test_net2.class
.\src\c2\Drawing.java
.\src\c2\f.jpg
.\src\c2\TrueFrametest.java
.\src\com\ColorChoseListener.java
.\src\com\ReadImg.java
.\src\com\TrueFrametest.java
.\src\net\bigwrok\Directory_util.java
.\src\net\bigwrok\InetAddrTest.java
.\src\net\bigwrok\InetAddrTest2.java
.\src\net\bigwrok\IO1.java
.\src\net\bigwrok\IO2.java
.\src\net\bigwrok\PPrint.java
.\src\net\bigwrok\Test2_net.java
.\src\net\bigwrok\Test_net2.java
]

 

posted on 2018-06-02 20:56  wait_for_you  阅读(847)  评论(0编辑  收藏  举报

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