java实现文件比较4，判断文件是否新增减少修改

我就是我 2023-09-28 12:53 94阅读 0赞

6/29

package com.taiyusoft;
    
    import java.io.File;
    import java.util.*;
    
    
    public class set3 {
        
        private static LinkedList<Fc> linkedList1 = new LinkedList<>();//读取路径1中的所有的文件
        private static LinkedList<Fc> linkedList2 = new LinkedList<>();//读取路径2中的所有的文件
    
    
        public static void main(String[] args) {
        
            long startTime = System.currentTimeMillis();
    
    
            String dirName1 = "C:\\Users\\taiyu\\Desktop\\4444\\file1\\";
            File file = new File(dirName1);
            readFileSum1(file, dirName1);
    
            String dirName2 = "C:\\Users\\taiyu\\Desktop\\file2\\";
            File file1 = new File(dirName2);
            readFileSum2(file1, dirName2);
    
    
            Set setOne1 = new LinkedHashSet<Fc>();
            setOne1.addAll(linkedList1);  //可以通过addAll把list集合转换为set集合
    
    
    //以数据1为主 增加数据2
            List listoneNot1 = new ArrayList<Fc>(); //存放数据一缺失的数据
            int setOneSize1 = setOne1.size(); //数据一大小
            for (int i = 0; i < linkedList2.size(); i++) {
         //数据二
                setOne1.add(linkedList2.get(i));
                if (setOne1.size() != setOneSize1) {
          //判断大小是否改变 ，改变表示数据缺失
                    listoneNot1.add(linkedList2.get(i)); //存放缺失了哪些数据
                    setOne1.remove(linkedList2.get(i));
                    setOneSize1 = setOne1.size(); //更新基础集合大小
                }
            }
    
    
            Set setOne2 = new LinkedHashSet<Fc>();
            setOne2.addAll(linkedList2);  //可以通过addAll把list集合转换为set集合
    
    //以数据2为主 增加数据1
            List listoneNot2 = new ArrayList<Fc>(); //存放数据一缺失的数据
            int setOneSize2 = setOne2.size();
            for (int i = 0; i < linkedList1.size(); i++) {
         //数据二
                setOne2.add(linkedList1.get(i));
    
                if (setOne2.size() != setOneSize2) {
          //判断大小是否改变 ，改变表示数据缺失
                    listoneNot2.add(linkedList1.get(i)); //存放缺失了哪些数据
                    setOne2.remove(linkedList1.get(i));
                    setOneSize2 = setOne2.size(); //更新基础集合大小
                }
            }
    
    
            List listoneNot3 = new ArrayList<Fc>(); //存放两者都缺失的文件(即发生修改的文件)
            for (int i = 0; i < listoneNot1.size(); i++) {
        
                String path1 = ((Fc) listoneNot1.get(i)).getPath();
                for (int j = 0; j < listoneNot2.size(); j++) {
        
                    String path2 = ((Fc) listoneNot2.get(j)).getPath();
                    if (path1.equals(path2)) {
        
                        listoneNot3.add(listoneNot2.get(j));
                        listoneNot2.remove(listoneNot2.get(j));
                        listoneNot1.remove(listoneNot1.get(i));
                    }
                }
            }
            //打印数据1缺失数据
            if (listoneNot1.size() > 0) {
        
                System.out.println("数据1新增与删除的文件如下");
                for (int i = 0; i < listoneNot1.size(); i++) {
        
                    System.out.println(dirName1 + "" + ((Fc) listoneNot1.get(0)).getPath());
                }
            } else {
        
                System.out.println("数据1无新增与删除的文件...");
            }
    
            //打印数据2缺失数据
            if (listoneNot2.size() > 0) {
        
                System.out.println("数据2新增与删除文件如下");
                for (int i = 0; i < listoneNot2.size(); i++) {
        
                    System.out.println(dirName2 + "" + ((Fc) listoneNot2.get(i)).getPath());
                }
            } else {
        
                System.out.println("数据2无新增与删除文件");
            }
            //打印数据3缺失数据
            if (listoneNot3.size() > 0) {
        
                System.out.println("两数据源之间发生修改的文件如下");
                for (int i = 0; i < listoneNot3.size(); i++) {
        
                    System.out.println(((Fc) listoneNot3.get(i)).getPath());
                }
            } else {
        
                System.out.println("两数据源之间无发生修改的文件");
            }
            //结束时间
            long endTime = System.currentTimeMillis();
            //打印
            System.out.println("程序运行时间：" + (double) (endTime - startTime) / 1000 + "s");
        }
    
        private static void readFileSum1(File root, String dirName1) {
        
            if (root.exists()) {
        
                if (root.isDirectory()) {
        
                    File[] files = root.listFiles();
                    if (files != null) {
        
                        for (int i = 0; i < files.length; i++) {
        
                            if (files[i].isFile()) {
        
    //                             linkedList1.add(files[i].toString().replace(dirName1, ""));
                                Fc fc = new Fc();
                                fc.setPath(files[i].toString().replace(dirName1, ""));
                                fc.setLastmodified(String.valueOf(files[i].lastModified()));
                                linkedList1.add(fc);
    
                            } else if (files[i].isDirectory()) {
        
                                readFileSum1(files[i], dirName1);
                            }
                            files[i] = null;
                        }
                    }
                    files = null;
                } else if (root.isFile()) {
        
                    Fc fc = new Fc();
                    fc.setPath(root.toString().replace(dirName1, ""));
                    fc.setLastmodified(String.valueOf(root.lastModified()));
                    linkedList1.add(fc);
    //                linkedList1.add(root.toString().replace(dirName1, ""));
                }
            }
        }
    
        private static void readFileSum2(File root, String dirName2) {
        
            if (root.exists()) {
        
                if (root.isDirectory()) {
        
                    File[] files = root.listFiles();
                    if (files != null) {
        
                        for (int i = 0; i < files.length; i++) {
        
                            if (files[i].isFile()) {
        
                                Fc fc = new Fc();
                                fc.setPath(files[i].toString().replace(dirName2, ""));
                                fc.setLastmodified(String.valueOf(files[i].lastModified()));
                                linkedList2.add(fc);
    //                            linkedList2.add(files[i].toString().replace(dirName2, ""));
                            } else if (files[i].isDirectory()) {
        
                                readFileSum2(files[i], dirName2);
                            }
                            files[i] = null;
                        }
                    }
                    files = null;
                } else if (root.isFile()) {
        
                    Fc fc = new Fc();
                    fc.setPath(root.toString().replace(dirName2, ""));
                    fc.setLastmodified(String.valueOf(root.lastModified()));
                    linkedList2.add(fc);
    //                linkedList2.add(root.toString().replace(dirName2, ""));
                }
            }
        }
    
    
    }

package com.taiyusoft;
    
    public class Fc {
        
        String path;
        String lastmodified;
    
        public String getPath() {
        
            return path;
        }
    
        public void setPath(String path) {
        
            this.path = path;
        }
    
        public String getLastmodified() {
        
            return lastmodified;
        }
    
        public void setLastmodified(String lastmodified) {
        
            this.lastmodified = lastmodified;
        }
    
        @Override
        public boolean equals(Object o) {
        
            if (this == o) return true;
            if (o == null || getClass() != o.getClass()) return false;
    
            Fc fc = (Fc) o;
    
            if (path != null ? !path.equals(fc.path) : fc.path != null) return false;
            return lastmodified != null ? lastmodified.equals(fc.lastmodified) : fc.lastmodified == null;
        }
    
        @Override
        public int hashCode() {
        
            int result = path != null ? path.hashCode() : 0;
            result = 31 * result + (lastmodified != null ? lastmodified.hashCode() : 0);
            return result;
        }
    }