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  • Java io下载并替换文件内容

    package com.example.demo.Text;
    
    import org.springframework.core.io.ClassPathResource;
    import org.springframework.http.HttpStatus;
    import org.springframework.http.ResponseEntity;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import javax.annotation.Resource;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.io.*;
    import java.net.URLEncoder;
    
    @RestController
    public class DownloadText {
    
        /**
         * Text模板下载
         *
         * @param response
         * @param request
         * @return
         */
        @RequestMapping(value = "/textExport")
        public ResponseEntity<Resource> excel2007Export(HttpServletResponse response, HttpServletRequest request) {
            try {
                ClassPathResource cpr = new ClassPathResource("/templates/test.txt");
                downLoadExcel("test.txt", response, cpr);
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return new ResponseEntity<Resource>(HttpStatus.OK);
        }
    
        public static void downLoadExcel(String fileName, HttpServletResponse response, ClassPathResource cpr) throws IOException {
            InputStream input = null;
            BufferedOutputStream output = null;
            try {
                response.setCharacterEncoding("UTF-8");
                response.setHeader("content-Type", "application/vnd.ms-excel");
                response.setHeader("Content-Disposition",
                        "attachment;filename="" + URLEncoder.encode(fileName, "UTF-8") + """);
                input = cpr.getInputStream();
                output = new BufferedOutputStream(response.getOutputStream());;
                String TxtBuff=null;
                String out="";
                InputStreamReader inputStreamReader = new InputStreamReader(input);
                BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
                while ((TxtBuff = bufferedReader.readLine()) !=null) {
                    TxtBuff = TxtBuff.replace("w", "====");
                    out+= TxtBuff + "
    ";
                }
                output.write(out.getBytes("UTF-8"));
                response.flushBuffer();
            } catch (IOException e) {
                e.printStackTrace();
            }finally {
                if (input != null)
                    input.close();
                if (output != null)
                    output.close();
            }
        }
    
    }
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  • 原文地址:https://www.cnblogs.com/wangdahui/p/12533325.html
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