Java之扫描目录，修改文件内容
扫描目录下文件，修改文件中指定内容
1 package org.utils.tools.fileoper; 2 3 import java.io.*; 4 import java.util.ArrayList; 5 import java.util.List; 6 7 /* 8 * 修改文件中的内容 9 * 替换properties文件中的ip 10 * */ 11 public class EditFile { 12 public static void main(String args[]) { 13 // String inputPath = "C:\\workspace\\hbase_test\\src\\main\\resource\\properties\\case_01.properties"; 14 // String outputPath = "C:\\workspace\\hbase_test\\src\\main\\resource\\properties\\case_out.properties"; 15 16 String srcStr = "bd.test.com"; //需要替换的字符串 17 String desStr = "10.15.100.25"; //用于替换的字符串 18 // 文件目录，不扫子目录 19 String dirPath = "C:\\workspace\\work\\bdd-bd-test\\" + 20 "src\\test\\resources\\properties\\case\\tunny\\001"; 21 22 File f = new File(dirPath); 23 String wholeFilePath; 24 String[] fileNames = f.list(); 25 for (String s : fileNames) { 26 wholeFilePath = dirPath + "\\" + s; 27 System.out.println("处理文件：" + wholeFilePath); 28 propertiesChange(wholeFilePath, srcStr, desStr); 29 } 30 } 31 32 /* 33 * 修改文件中的指定内容 34 * */ 35 public static void propertiesChange(String filePath, String srcStr, String desStr) { 36 //字符流 37 FileReader fr = null; 38 FileWriter fw = null; 39 //缓冲流 40 BufferedReader br = null; 41 BufferedWriter bw = null; 42 43 List list = new ArrayList<>(); 44 //读取文件内容保证在list中 45 try { 46 fr = new FileReader(new File(filePath)); 47 br = new BufferedReader(fr); //扩容，类似加水管 48 String line = br.readLine(); //逐行复制 49 while (line != null) { 50 //修改指定内容 51 if (line.contains(srcStr)) { 52 line = line.replace(srcStr, desStr); 53 } 54 list.add(line); 55 line = br.readLine(); 56 } 57 } catch (IOException e) { 58 e.printStackTrace(); 59 } finally { 60 try { 61 //关闭流，顺序与打开相反 62 br.close(); 63 fr.close(); 64 } catch (IOException e) { 65 e.printStackTrace(); 66 } 67 } 68 69 //将list中内容输出到原文件中 70 try { 71 fw = new FileWriter(filePath); 72 bw = new BufferedWriter(fw); 73 for (Object s : list) { 74 bw.write((String) s); 75 bw.newLine(); //换行输出 76 } 77 System.out.println("文件修改成功！"); 78 } catch (IOException e) { 79 e.printStackTrace(); 80 } finally { 81 try { 82 //关闭流，顺序与打开相反 83 bw.close(); 84 fw.close(); 85 } catch (IOException e) { 86 e.printStackTrace(); 87 } 88 } 89 } 90 91 /* 92 * 读取文件并修改指定内容，复制到另一个文件中 93 * */ 94 public static void propertiesChange(String inputPath, String outputPath, String srcStr, String desStr) { 95 //字符流 96 FileReader fr = null; 97 FileWriter fw = null; 98 //缓冲流 99 BufferedReader br = null; 100 BufferedWriter bw = null; 101 102 try { 103 fr = new FileReader(new File(inputPath)); 104 br = new BufferedReader(fr); //扩容，类似加水管 105 fw = new FileWriter(outputPath); 106 bw = new BufferedWriter(fw); 107 108 String line = br.readLine(); //逐行复制 109 while (line != null) { 110 if (line.contains(srcStr)) { 111 line = line.replace(srcStr, desStr); 112 } 113 bw.write(line); 114 bw.newLine(); //换行输出 115 line = br.readLine(); 116 } 117 System.out.println("文件修改成功！"); 118 } catch (IOException e) { 119 e.printStackTrace(); 120 } finally { 121 try { 122 //关闭流，顺序与打开相反 123 bw.close(); 124 br.close(); 125 fw.close(); 126 fr.close(); 127 } catch (IOException e) { 128 e.printStackTrace(); 129 } 130 } 131 } 132 133 134 }
