TXT文件上传下载

Dear 丶 2022-06-13 09:43 291阅读 0赞

### 生成UUID ###

UUID uuid=UUID.randomUUID();
        System.out.println("uuid======"+uuid);

### 文件上传下载 ###

package com.imt.sys.util;
    
    import java.io.BufferedReader;
    import java.io.File;
    import java.io.FileReader;
    import java.io.FileWriter;
    import java.io.IOException;
    import java.util.UUID;
    
    import org.junit.Test;
    import org.springframework.test.context.TestExecutionListeners;
    
    public class uploadText { 
        private   String file = "";
        //保存字符串到文件中
        public void saveAsFileWriter(String content,UUID uuid) {
         file="F:/text/"+uuid+".txt";
         FileWriter fwriter = null;
         try {
          fwriter = new FileWriter(file);
          fwriter.write(content);
         } catch (IOException ex) {
          ex.printStackTrace();
         } finally {
          try {
           fwriter.flush();
           fwriter.close();
          } catch (IOException ex) {
           ex.printStackTrace();
          }
         }
        }
            //读取本地文本
           public  String readFileByLines(UUID uuid) {
                File file = new File("F:/text/"+uuid+".txt");
                BufferedReader reader = null;
                String content="";
                try {
                    System.out.println("以行为单位读取文件内容，一次读一整行：");
                    reader = new BufferedReader(new FileReader(file));
                    String tempString = null;
                    int line = 1;
                    // 一次读入一行，直到读入null为文件结束
                    while ((tempString = reader.readLine()) != null) {
                   //加上p标签 ，前台显示可以换行 
                   tempString="<p>"+tempString+"</p>";
                    // 显示行号
                                        System.out.println("line?????????????????????????????????? " + line + ": " + tempString);
                        content=tempString;
                        line++;
                    }
                }catch(IOException e){
    
                }
                return content;
           }
    }