Java本地文件下载(上传)，可启动服务代替SCP命令共享文件
本地文件下载（上传），可启动服务代替SCP命令共享文件
新建spring-boot项目
pom.xml
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.2.5.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>me.muphy</groupId> <artifactId>download</artifactId> <version>0.0.1-SNAPSHOT</version> <name>download</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
application.properties
server.port=8088 #文件下载 #download.file.default=20200428.xls download.path=E:/workspace/download/
DownloadApplication.java
package me.muphy; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class DownloadApplication { public static void main(String[] args) throws InterruptedException { SpringApplication.run(DownloadApplication.class, args); } }
Index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>莫非录音机</title> </head> <body> <div> <div><span><a href="/ll">文件下载</a></span></div> <div><span><a href="/upload/index.html">文件上传</a></span></div> <div><span><a href="/record/index.html">录音机</a></span></div> </div> </body> </html>
DownLoadController.java
package me.muphy.download; import org.springframework.beans.factory.annotation.Value; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.*; import java.util.ArrayList; import java.util.List; @RestController public class DownLoadController { @Value("${download.file.default:}") private String downloadDefaultFile; @Value("${download.path:E:/workspace/download/}") private String downloadPath; @GetMapping("/dl") public void download(String f, HttpServletResponse response) throws IOException { // 下载本地文件 File baseFile = new File(downloadPath); String fileName = downloadDefaultFile; // 文件的默认保存名 if (f != null && !"".equals(f.trim())) { fileName = f; } File file = new File(downloadPath + fileName); if(!file.isFile() || !file.getCanonicalPath().startsWith(baseFile.getCanonicalPath())){ error(response); return; } // 读到流中 InputStream inStream = new FileInputStream(file);// 文件的存放路径 // 设置输出的格式 response.reset(); response.setContentType("bin"); response.addHeader("Content-Disposition", "attachment; filename=\"" + file.getName() + "\""); // 循环取出流中的数据 byte[] b = new byte[100]; int len; while ((len = inStream.read(b)) > 0) response.getOutputStream().write(b, 0, len); inStream.close(); } private void error(HttpServletResponse response) throws IOException { response.reset(); response.setContentType("text/html;charset=utf-8"); PrintWriter writer = new PrintWriter(new OutputStreamWriter(response.getOutputStream(), "utf-8")); writer.print("文件不存在!"); writer.close(); return; } @GetMapping("/ll") public String ListFiles(String d, HttpServletRequest request) throws IOException { File baseFile = new File(downloadPath); if (!baseFile.isDirectory()) { System.out.println(downloadPath + " 目录不存在，只能下载此目录下面的文件，请确保配置路径（download.path={path}）存在"); return "目录不存在!"; } String ip = request.getServerName(); int port = request.getServerPort(); List<String> fns = new ArrayList<>(); String path = baseFile.getAbsolutePath(); if(d != null && !d.isEmpty()){ path += d; } File file = new File(path.replaceAll("/+", "/")); if (file.isDirectory()) { file = file.getCanonicalFile(); File[] files = file.listFiles(); for (int i = 0; i < files.length; i++) { if (files[i].isDirectory()) { fns.add("<span>目录：<a href=\"/ll?d=" + getQueryParameter(files[i], baseFile) + "\" >" + files[i].getName() + "</a></span>"); continue; } fns.add("<span>文件：<a href=\"/dl?f=" + getQueryParameter(files[i], baseFile) + "\" >" + files[i].getName() + "</a></span>"); } } else { return "目录不存在!"; } fns.sort((x,y)->y.compareTo(x)); if(!file.getCanonicalPath().equals(baseFile.getAbsolutePath())){ fns.add(0, "<span>目录：<a href=\"/ll?d=" + getQueryParameter(file, baseFile) + "/..\" >..</a></span>"); } return String.join("<br>", fns); } private String getQueryParameter(File file, File baseFile) throws IOException { return file.getCanonicalPath() .replaceAll("\\\\", "/") .replaceAll(baseFile.getAbsolutePath().replaceAll("\\\\", "/"), "" ); } }
新增文件上传代码
upload.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>文件上传</title> </head> <body> <div> <h1>文件上传</h1> <form action="/ul" method="post" enctype="multipart/form-data"> <p>选择文件: <input type="file" name="fileName"/></p> <p>选择文件: <input type="file" name="fileName"/></p> <p><input type="submit" value="提交"/></p> </form> </div> </body> </html>
UploadController.java
package me.muphy.upload; import org.springframework.beans.factory.annotation.Value; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.multipart.MultipartFile; import org.springframework.web.multipart.MultipartHttpServletRequest; import javax.servlet.http.HttpServletRequest; import java.io.File; import java.io.IOException; import java.util.List; @RestController public class UploadController { @Value("${download.path:E:/workspace/download/}") private String uploadPath; /** * 实现多文件上传 */ @PostMapping(value = "ul") public @ResponseBody String multiFileUpload(HttpServletRequest request) throws IOException { List<MultipartFile> files = ((MultipartHttpServletRequest) request).getFiles("fileName"); if (files.isEmpty()) { return "上传失败！"; } for (MultipartFile file : files) { String fileName = file.getOriginalFilename(); int size = (int) file.getSize(); System.out.println(fileName + "-->" + size); if (file.isEmpty()) { return "上传失败！"; } else { File dest = new File(uploadPath + "/upload/" + fileName); if (!dest.getParentFile().exists()) { //判断文件父目录是否存在 dest.getParentFile().mkdir(); } file.transferTo(dest); } } return "上传成功！"; } }
启动
