java实现替换文本中的乱码字符

个人便捷工具

功能

在指定的文本文件中，批量替换某一个或段字符串，并更新文件内容。

实现

• 创建文件加载与操作转换类Trasfer.java

  import java.io.IOException;
  import java.nio.file.Files;
  import java.nio.file.Paths;
  import java.util.HashMap;
  import java.util.Map;
  public class Trasfer {
  
      /**
       * 记录替换的记录
       */
      private static Map<String, Integer> recordMap = new HashMap<String, Integer>();
      /**
       * 文件内容
       */
      private static StringBuffer content = null;
  
      public static StringBuffer getContent() {
          return content;
      }
  
      public static Map<String, Integer> getRecordMap() {
          return recordMap;
      }
  
      /**
       * JDK11 读取与加载文件
       *
       * @param fileName 读取源文件名
       * @return
       */
      public static StringBuffer loadByFile(String fileName) {
          StringBuffer sbf = new StringBuffer();
          try {
              // 读取字节流
              byte[] bytes = Files.readAllBytes(Paths.get(fileName));
              sbf = new StringBuffer(new String(bytes, "utf-8"));
              return content = sbf;
          } catch (IOException e) {
              e.printStackTrace();
          }
          return content = sbf;
      }
  
      /**
       * 替换指定字符串
       *
       * @param org    被替换的字符串
       * @param result 替换成的字符串
       * @return
       */
      public static StringBuffer replaceStr(String org, String result) {
          if (content == null) {
              return content;
          }
          int index = content.indexOf(org);
          while (index >= 0) {
              content.replace(index, index + 1, result);
  
              index = content.indexOf(org);
  
              Integer count = recordMap.get(org);
              // 替换次数
              recordMap.put(org, count == null ? 1 : ++count);
          }
          return content;
      }
  
  
      /**
       * 以默认UTF-8编码，存储内容到指定文件
       *
       * @param destFileName 目标文件名
       */
      public static void saveToFile(String destFileName) {
          if (recordMap.isEmpty()) {
              return;
          }
          recordMap.clear();
          try {
  
              // Java 11 , default StandardCharsets.UTF_8
              Files.writeString(Paths.get(destFileName), content);
  
              // encoding
              // Files.writeString(Paths.get(path), content, StandardCharsets.US_ASCII);
  
              // extra options
              // Files.writeString(Paths.get(path), content,
              //		StandardOpenOption.CREATE, StandardOpenOption.APPEND);
              System.out.println("save success");
  
          } catch (IOException e) {
              e.printStackTrace();
          }
  
      }
  }
  

• 创建工具入口，这里使用测试类TrasferTest.java

  import org.junit.Test;
  public class TrasferTest {
  
      @Test
      public void readFileContent() throws Exception {
          // 源文件路径
          String sourcePath = "D:\\1lagoustudy\\workspace\\doc\\spring\\Spring.md";
  //        sourcePath = "D:\\1lagoustudy\\workspace\\doc\\mybatis\\mysql 手写.md";
          // 目标文件路径
          String destFileName = "D:\\1lagoustudy\\workspace\\doc\\spring\\test2.md";
          destFileName = sourcePath;
          Trasfer.loadByFile(sourcePath);
  
          System.out.println(Trasfer.getContent());
  
          // 核心替换
          replace();
  
          System.out.println("替换目标文字个数: " + Trasfer.getRecordMap());
  
          Trasfer.saveToFile(destFileName);
      }
  
      /**
       * 替换内容
       */
      private void replace() {
          Trasfer.replaceStr("⽀", "支");
          Trasfer.replaceStr("⽬", "目");
          Trasfer.replaceStr("⽅", "方");
          Trasfer.replaceStr("⽣", "生");
          Trasfer.replaceStr("⾼", "高");
          Trasfer.replaceStr("⾏", "行");
          Trasfer.replaceStr("⻆", "角");
          Trasfer.replaceStr("⾮", "非");
          Trasfer.replaceStr("⼦", "子");
          Trasfer.replaceStr("⼯", "工");
          Trasfer.replaceStr("⼊", "入");
          Trasfer.replaceStr("⾯", "面");
          Trasfer.replaceStr("⽤", "用");
          Trasfer.replaceStr("⼆", "二");
          Trasfer.replaceStr("⼀", "一");
          Trasfer.replaceStr("⽂", "文");
          Trasfer.replaceStr("⼼", "心");
          Trasfer.replaceStr("⼚", "厂");
          Trasfer.replaceStr("⾥", "里");
          Trasfer.replaceStr("⽆", "无");
          Trasfer.replaceStr("⽽", "而");
          Trasfer.replaceStr("⽐", "比");
          Trasfer.replaceStr("⻅", "见");
          Trasfer.replaceStr("⽇", "日");
          Trasfer.replaceStr("⼝", "口");
        // 更新
        Trasfer.replaceStr("⼿", "手");
        Trasfer.replaceStr("⾃", "自");
        Trasfer.replaceStr("⼏", "几");
        Trasfer.replaceStr("⼰", "己");
        Trasfer.replaceStr("⻄", "西");
        Trasfer.replaceStr("⻚", "页");
        Trasfer.replaceStr("⼗", "十");
        Trasfer.replaceStr("⾄", "至");
        Trasfer.replaceStr("⼋", "八");
        Trasfer.replaceStr("⻛", "风");
        Trasfer.replaceStr("⽚", "片");
        Trasfer.replaceStr("⼴", "广");
        Trasfer.replaceStr("⽹", "网");
        Trasfer.replaceStr("⾸", "首");
      }
  }
  

  若不想更新原文件，想生成新文件，可以改变量destFileName的值为临时文件路径

• 如果想对内容进行其他操作，可以再添加方法