java实现系统文件管理

环境：jdk17+springboot+Vue+ElementUI
背景：公司所做的项目需要别的系统向我们服务器上传文件，当我们需要查看这些文件什么时候上传的、文件数据是怎样的，只能去机房，排查问题效率较低，做此页面，可快速查看上传的文件信息，且可下载到本地查看。为了生产安全，不支持修改及上传文件，如果有的朋友想做，可自行查找资料。
需求：实现系统文件的查询及下载。展示系统的文件信息，如文件名、文件大小、最后更新时间及权限等。
注意：本篇文章是以window系统做的样例，不过一般服务器都是在linux系统，只需将前端的初始地址换成linux地址，一般格式为：/home/app。
效果图

直接上代码，前端代码：

<template><div><div><el-col :xl="4" :lg="5"><el-input v-model="curPath" label-width='80px' size="small" type="text">当前位置：</el-input></el-col><el-button type="primary" size="small" @click="getParentData()" icon="el-icon-back">返回上级</el-button><el-button type="primary" size="small" @click="refresh()" icon="el-icon-refresh">刷新</el-button></div><el-table :data="fileList" v-loading="tableLoading"><el-table-column label="名称" prop="fileName"><!-- eslint-disable-next-line--><template slot-scope="scope"><el-button type="text" v-if="!scope.row.fileType" @click="getSonData(scope.row)">{{scope.row.fileName}}</el-button><span v-if="scope.row.fileType">{{ scope.row.fileName }}</span></template></el-table-column><el-table-column label="类型" align="center"><!-- eslint-disable-next-line--><template slot-scope="scope"><div>{{ typeName(scope.row.fileType) }}</div></template></el-table-column><el-table-column label="大小" prop="fileSize"></el-table-column><el-table-column label="更新时间" prop="lastModifiedDate"></el-table-column><el-table-column align="center" label="权限" width="120"><!-- eslint-disable-next-line--><template slot-scope="scope"><div>{{ getAuthority(scope.row) }}</div></template></el-table-column><el-table-column label="操作"><!-- eslint-disable-next-line--><template slot-scope="scope"><el-button size="mini" v-if="scope.row.fileType" type="text" @click="download(scope.row.path)">下载</el-button></template></el-table-column></el-table></div>
</template>
<script>
import axios from "axios";export default {name: 'App',data() {return {curPath: "D:\\",fileList: [],tableLoading: false,}},created() {this.getData()},methods: {getData: function () {const vm = thisconst params = {path: this.curPath}axios({method: 'get',url: "/sysFile/getSysFiles",params}).then(res => {const result = res.dataif (result && result.code === 200) {this.fileList = result.dataconsole.log(this.fileList)}vm.tableLoading = false})},getSonData(row) {this.curPath = row.paththis.getData()},getParentData() {if (this.curPath === '') {this.$message({type: 'warning',message: '没有上级！'})return}// linux系统中，将 \\ 改为 / 即可this.curPath = this.curPath.slice(0, this.curPath.lastIndexOf("\\"))this.getData()},refresh() {this.type = 0this.getData()},download(path) {const params = {path: path}axios({method: 'get',url: "/sysFile/downloadFile",responseType: 'blob',params}).then(res => {// linux系统中，将 \\ 改为 / 即可const fileName = path.slice(path.lastIndexOf("\\") + 1, path.length)const blob = new Blob([res.data])if ('download' in document.createElement('a')) {// 非IE下载console.log('非IE')const elink = document.createElement('a')elink.download = fileNameelink.style.display = 'none'elink.href = URL.createObjectURL(blob)document.body.appendChild(elink)elink.click()URL.revokeObjectURL(elink.href)// 释放URL 对象document.body.removeChild(elink)} else {// IE10+下载navigator.msSaveBlob(blob, fileName)}})},typeName(type) {if (type) {return "文件"}return "文件夹"},getAuthority(row) {let authority = ''if (row.canRead) {authority = authority + 'r'} else {authority = authority + '-'}if (row.canWrite) {authority = authority + 'w'} else {authority = authority + '-'}if (row.canExecute) {authority = authority + 'x'} else {authority = authority + '-'}return authority}}
}
</script><style>
.el-header, .el-footer {background-color: #B3C0D1;color: #333;text-align: center;line-height: 60px;
}.el-aside {background-color: #D3DCE6;color: #333;text-align: center;line-height: 200px;
}.el-main {background-color: #E9EEF3;color: #333;text-align: center;line-height: 160px;
}body > .el-container {margin-bottom: 40px;
}.el-container:nth-child(5) .el-aside,
.el-container:nth-child(6) .el-aside {line-height: 260px;
}.el-container:nth-child(7) .el-aside {line-height: 320px;
}
</style>

后端代码：

package org.wjg.onlinexml.controller;import org.apache.commons.io.FileUtils;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.wjg.onlinexml.po.Result;
import org.wjg.onlinexml.po.SysFileDo;import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.*;@RestController
public class SysFileController {private static final SimpleDateFormat simple = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");@GetMapping("/getSysFiles")public Result getSysFiles(@RequestParam String path) {try {File files = null;if (!StringUtils.isEmpty(path)) {files = new File(path);} else {return Result.builder().code(200).msg("路径为空").build();}if (!files.exists()) {return Result.builder().code(200).msg("文件不存在").build();}List<SysFileDo> result = new ArrayList<>();for (File file : files.listFiles()) {SysFileDo sysFileDo = new SysFileDo();//文件名sysFileDo.setFileName(file.getName());//是否为文件sysFileDo.setFileType(file.isFile());//文件大小，文件夹大小一般形式为0，不过可以自己遍历文件夹下的内容计算该文件夹的大小sysFileDo.setFileSize(file.length() / 1024 + "KB");//是否可执行sysFileDo.setCanExecute(file.canExecute());//是否可读sysFileDo.setCanRead(file.canRead());//是否可写（以上三种权限跟实际可能会有偏差的）sysFileDo.setCanWrite(file.canWrite());// 最后修改时间sysFileDo.setLastModifiedDate(simple.format(new Date(file.lastModified())));//最后修改时间的时间戳，方便排序sysFileDo.setLastModified(file.lastModified());//当前路径sysFileDo.setPath(file.getAbsolutePath());result.add(sysFileDo);}Collections.sort(result, Comparator.comparing(SysFileDo::getLastModified));Collections.reverse(result);return Result.builder().code(200).msg("查询成功").data(result).build();} catch (Exception e) {e.printStackTrace();}return Result.builder().build();}@RequestMapping("/downloadFile")public ResponseEntity<byte[]> download(@RequestParam String path) throws IOException {File file = new File(path);HttpHeaders httpHeaders = new HttpHeaders();httpHeaders.setContentDispositionFormData("attachment", "");return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file), httpHeaders, HttpStatus.CREATED);}}

实体类：

@Data
@NoArgsConstructor
public class SysFileDo {private String fileName;private boolean fileType;private String fileSize;private boolean canRead;private boolean canExecute;private boolean canWrite;private String lastModifiedDate;private long lastModified;private String path;
}

package org.wjg.onlinexml.po;import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;@Data
@Builder(toBuilder = true)
@NoArgsConstructor
@AllArgsConstructor
public class Result<T> {private int code;private String msg;private T data;
}

好了，主要的代码就这些。还有两个依赖：

		<!-- 处理文件上传的 Java 库 --><dependency><groupId>commons-fileupload</groupId><artifactId>commons-fileupload</artifactId><version>1.5</version></dependency><!--  Apache 的开源工具库,包含了许多实用的文件操作、流操作相关的功能和工具类，比如文件读写、文件和目录的操作、流的处理和转换 --><dependency><groupId>commons-io</groupId><artifactId>commons-io</artifactId><version>2.5</version></dependency>