java 实现读取本地日志文件列表并在浏览器上显示



import org.springframework.core.io.Resource;

import org.springframework.core.io.UrlResource;

import org.springframework.http.HttpHeaders;

import org.springframework.http.MediaType;

import org.springframework.http.ResponseEntity;

import org.springframework.web.bind.annotation.*;

import java.io.*;

import java.net.MalformedURLException;

import java.net.URLEncoder;

import java.nio.file.Path;

import java.nio.file.Paths;

@RestController

@RequestMapping("file")

public class FileController1 {

    private static final String directory = "D:/";

    /**

     * 获取文件列表

     */

    @GetMapping("files")

    public ResponseEntity<?> list(@RequestParam(required = false) String filename) throws Exception {

        final File file = new File(directory, filename == null ? "" : filename);

        if (file.isDirectory()) {

            return ResponseEntity.ok().contentType(MediaType.TEXT_HTML).body(buildHtml(file));

        } else {

            if (file.length() > 5 * 1024 * 1024) {

                final String name = file.getName();

                return ResponseEntity.ok().header(HttpHeaders.CONTENT_DISPOSITION,

                        "attachment;filename*=UTF-8''" + URLEncoder.encode(name, "UTF-8")).body(download(file));

            } else {

                BufferedReader br = new BufferedReader(new FileReader(file));

                final StringBuilder sb = new StringBuilder();

                String st;

                while ((st = br.readLine()) != null) {

                    sb.append(st).append("\n");

                }

                return ResponseEntity.ok().header("Content-Type", "text/plain;charset=UTF-8").body(sb.toString());

            }

        }

    }

    private Resource download(File file) throws MalformedURLException {

        final String parent = file.getParent();

        final String name = file.getName();

        final Path path = Paths.get(parent).resolve(name);

        return new UrlResource(path.toUri());

    }

    public String buildHtml(File file) {

        final StringBuilder sb = new StringBuilder("<!DOCTYPE html><html lang='zh'><head><meta charset='UTF-8'></head><body><ul>");

        final File[] files = file.listFiles();

        final String parent = file.getParent();

        if (parent != null) {

            final String url = parent.substring(directory.length()).replaceAll("[\\\\/]", "%5C");

            sb.append("<li><a href='/file/files?filename=").append(url).append("'>· ·</a></li>");

        }

        if (files != null) {

            for (File file1 : files) {

                final String filePath = file1.getPath().substring(directory.length());

                final String fileUrl = filePath.replaceAll("[\\\\/]", "%5C");

                sb.append("<li><a href='/file/files?filename=").append(fileUrl).append("'>").append(file1.getName()).append("</a></li>");

            }

        }

        sb.append("</ul></body></html>");

        return sb.toString();

    }

}
巴特西

java 实现读取本地日志文件列表并在浏览器上显示

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