package thread; import java.io.*; public class hh {
      /**      * 创建文件      * @param fileName      * @return      */     public static boolean createFile(File fileName)throws Exception{
          try{
              if(!fileName.exists()){
                  fileName.createNewFile();             }         }catch(Exception e){
              e.printStackTrace();         }         return true;     }     /**      *读取TXT内容      * @param file      * @return      */     public static String readTxtFile(File file){
          String result = "";         try {
              InputStreamReader reader = new InputStreamReader(new FileInputStream(file),"gbk");             BufferedReader br = new BufferedReader(reader);             String s = null;             while((s=br.readLine())!=null){
                  result = result  + s;                 System.out.println(s);             }         } catch (Exception e) {
              e.printStackTrace();         }         return result;     }     /**      * 写入TXT，覆盖原内容      * @param content      * @param fileName      * @return      * @throws Exception      */     public static boolean writeTxtFile(String content,File fileName)throws Exception{
          RandomAccessFile mm=null;         boolean flag=false;         FileOutputStream fileOutputStream=null;         try {
              fileOutputStream = new FileOutputStream(fileName);             fileOutputStream.write(content.getBytes("gbk"));             fileOutputStream.close();             flag=true;         } catch (Exception e) {
              e.printStackTrace();         }         return flag;     }     /**      * 写入TXT，追加写入      * @param filePath      * @param content      */     public static void fileChaseFW(String filePath, String content) {
          try {
              //构造函数中的第二个参数true表示以追加形式写文件             FileWriter fw = new FileWriter(filePath,true);             fw.write(content);             fw.close();         } catch (IOException e) {
              System.out.println("文件写入失败！" + e);         }     }     public static void main(String[] args) throws Exception{
          File file = new File("D:\\123wu吴.txt");         createFile(file);         readTxtFile(file); //        writeTxtFile("我是写入的内容11",file);         fileChaseFW("D:\\123wu吴.txt","66666666");     } }