java 编程思想 Directory工具类

Posted 2020-11-10 kwaitfort

  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+"

files: "+files;
 52             return "dirs: " +PPrint.pformat(dirs)+"

files: "+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:dev2workspaceseehopeigworksrccomColorChoseListener.java,
104                 D:dev2workspaceseehopeigworksrccomReadImg.java, 
105                 D:dev2workspaceseehopeigworksrccomTrueFrametest.java]
106                         */
107 
108         TreeInfo str2 = walk( test);
109         System.out.println(str2);    
110         
111        /* 
112         dirs: [..settings, .in, .inc2, .incom, .in
et, .in
etigwrok, .src, .srcc2, .srccom, .src
et, .src
etigwrok]
113 
114         files: [..classpath, ..project, ..settingsorg.eclipse.jdt.core.prefs, .inc2Draw2.class, .inc2Drawing$1.class, .inc2Drawing.class, .inc2f.jpg, .inc2MymenuAdapter.class, .inc2MyMenuItemAction.class, .inc2MyStrokeAction.class, .inc2ShapeAndColor.class, .inc2TrueFrametest$1.class, .inc2TrueFrametest$2.class, .inc2TrueFrametest$3.class, .inc2TrueFrametest.class, .incomColorChoseListener.class, .incomDraw2.class, .incomMymenuAdapter.class, .incomMyMenuItemAction.class, .incomMyStrokeAction.class, .incomReadImg.class, .incomShapeAndColor.class, .incomTrueFrametest$1.class, .incomTrueFrametest$2.class, .incomTrueFrametest$3.class, .incomTrueFrametest$4.class, .incomTrueFrametest.class, .in
etigwrokDirectory_util$1.class, .in
etigwrokDirectory_util$TreeInfo.class, .in
etigwrokDirectory_util.class, .in
etigwrokInetAddrTest.class, .in
etigwrokInetAddrTest2.class, .in
etigwrokIO1.class, .in
etigwrokTest2_net.class, .in
etigwrokTest_net2.class, .srcc2Drawing.java, .srcc2f.jpg, .srcc2TrueFrametest.java, .srccomColorChoseListener.java, .srccomReadImg.java, .srccomTrueFrametest.java, .src
etigwrokDirectory_util.java, .src
etigwrokInetAddrTest.java, .src
etigwrokInetAddrTest2.java, .src
etigwrokIO1.java, .src
etigwrokTest2_net.java, .src
etigwrokTest_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("
");
19             }
20             res.append(elem);
21         }//for
22 
23         if (c.size() != 1) {
24             res.append("
");
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
..settingsorg.eclipse.jdt.core.prefs
.inc2Draw2.class
.inc2Drawing$1.class
.inc2Drawing.class
.inc2f.jpg
.inc2MymenuAdapter.class
.inc2MyMenuItemAction.class
.inc2MyStrokeAction.class
.inc2ShapeAndColor.class
.inc2TrueFrametest$1.class
.inc2TrueFrametest$2.class
.inc2TrueFrametest$3.class
.inc2TrueFrametest.class
.incomColorChoseListener.class
.incomDraw2.class
.incomMymenuAdapter.class
.incomMyMenuItemAction.class
.incomMyStrokeAction.class
.incomReadImg.class
.incomShapeAndColor.class
.incomTrueFrametest$1.class
.incomTrueFrametest$2.class
.incomTrueFrametest$3.class
.incomTrueFrametest$4.class
.incomTrueFrametest.class
.in
etigwrokDirectory_util$1.class
.in
etigwrokDirectory_util$TreeInfo.class
.in
etigwrokDirectory_util.class
.in
etigwrokInetAddrTest.class
.in
etigwrokInetAddrTest2.class
.in
etigwrokIO1.class
.in
etigwrokIO2.class
.in
etigwrokPPrint.class
.in
etigwrokTest2_net.class
.in
etigwrokTest_net2.class
.srcc2Drawing.java
.srcc2f.jpg
.srcc2TrueFrametest.java
.srccomColorChoseListener.java
.srccomReadImg.java
.srccomTrueFrametest.java
.src
etigwrokDirectory_util.java
.src
etigwrokInetAddrTest.java
.src
etigwrokInetAddrTest2.java
.src
etigwrokIO1.java
.src
etigwrokIO2.java
.src
etigwrokPPrint.java
.src
etigwrokTest2_net.java
.src
etigwrokTest_net2.java
]