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Commit 2f7e20a

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Java:APIJSONBoot 新增文件 上传、浏览、下载 接口
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‎APIJSON-Java-Server/APIJSONBoot/src/main/java/apijson/boot/DemoController.java

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import apijson.orm.exception.OutOfRangeException;
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/**request controller
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/**数据相关的控制器,包括通用增删改查接口等
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* <br > 建议全通过HTTP POST来请求:
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* <br > 1.减少代码 - 客户端无需写HTTP GET,PUT等各种方式的请求代码
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* <br > 2.提高性能 - 无需URL encode和decode
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package apijson.boot;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.util.ArrayList;
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import java.util.List;
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import javax.annotation.PostConstruct;
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import org.springframework.core.io.InputStreamResource;
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import org.springframework.http.HttpHeaders;
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import org.springframework.http.MediaType;
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import org.springframework.http.ResponseEntity;
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import org.springframework.stereotype.Controller;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.PathVariable;
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import org.springframework.web.bind.annotation.PostMapping;
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import org.springframework.web.bind.annotation.RequestParam;
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import org.springframework.web.bind.annotation.ResponseBody;
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import org.springframework.web.multipart.MultipartFile;
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import com.alibaba.fastjson.JSONObject;
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import apijson.demo.DemoParser;
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/**文件相关的控制器,包括上传、下载、浏览等
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* @author : ramostear
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* @modifier : Lemon
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* @date : 2019年3月8日 0008-15:35
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*/
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@Controller
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public class FileController {
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private static String fileUploadRootDir = null;
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// @Value"${file.upload.root.dir.windows}")
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String fileUploadRootDirWindows = "C:/work/upload/";
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// @Value"${file.upload.root.dir.mac}")
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String fileUploadRootDirMac = "/Users/Tommy/upload/";
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// @Value"${file.upload.root.dir.linux}")
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String fileUploadRootDirLinux = "~/upload/";
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private static List<String> fileRepository = new ArrayList<>();
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@PostConstruct
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public void initFileRepository(){
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// 判断文件夹是否存在,不存在就创建
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String osName = System.getProperty("os.name");
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if (osName.startsWith("Mac OS")) {
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// 苹果
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fileUploadRootDir = fileUploadRootDirMac;
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} else if (osName.startsWith("Windows")) {
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// windows
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fileUploadRootDir = fileUploadRootDirWindows;
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} else {
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// unix or linux
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fileUploadRootDir = fileUploadRootDirLinux;
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}
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File directories = new File(fileUploadRootDir);
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if (directories.exists()) {
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System.out.println("文件上传根目录已存在");
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} else { // 如果目录不存在就创建目录
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if (directories.mkdirs()) {
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System.out.println("创建多级目录成功");
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} else {
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System.out.println("创建多级目录失败");
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}
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}
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}
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@GetMapping("/files")
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@ResponseBody
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public JSONObject files() {
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JSONObject res = new JSONObject();
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res.put("data", fileRepository);
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return DemoParser.extendSuccessResult(res);
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}
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@PostMapping(value = "/upload", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
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@ResponseBody
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public JSONObject upload(@RequestParam("file") MultipartFile file) {
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try {
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File convertFile = new File(fileUploadRootDir + file.getOriginalFilename());
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FileOutputStream fileOutputStream;
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fileOutputStream = new FileOutputStream(convertFile);
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fileOutputStream.write(file.getBytes());
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fileOutputStream.close();
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fileRepository.add(file.getOriginalFilename());
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JSONObject res = new JSONObject();
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res.put("path", file.getOriginalFilename());
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res.put("size", file.getBytes().length);
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return DemoParser.extendSuccessResult(res);
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}
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catch (Exception e) {
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e.printStackTrace();
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return DemoParser.newErrorResult(e);
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}
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}
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@GetMapping("/download/{fileName}")
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@ResponseBody
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public ResponseEntity<Object> download(@PathVariable(name = "fileName") String fileName) throws FileNotFoundException {
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File file = new File(fileUploadRootDir + fileName);
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InputStreamResource resource = new InputStreamResource(new FileInputStream(file));
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HttpHeaders headers = new HttpHeaders();
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headers.add("Content-Disposition", String.format("attachment;filename=\"%s", fileName));
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headers.add("Cache-Control", "no-cache,no-store,must-revalidate");
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headers.add("Pragma", "no-cache");
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headers.add("Expires", "0");
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ResponseEntity<Object> responseEntity = ResponseEntity.ok()
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.headers(headers)
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.contentLength(file.length())
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.contentType(MediaType.parseMediaType("application/txt"))
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.body(resource);
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return responseEntity;
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}
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}

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