TXT文件上传下载

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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;       }}

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