public void download(HttpServletResponse response) throws IOException { String[] filePath = new String[]{"D:\\ykds\\1aa.jpg", "D:\\ykds\\2aa.jpg", "D:\\ykds\\3aa.jpg"}; List<File> fileList = new ArrayList<>(); for (String s : filePath) { File file = new File(s); fileList.add(file); } response.setHeader("content-type", "application/octet-stream"); response.setContentType("application/octet-stream"); response.setHeader(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=download.zip"); ZipUtils.downloadZip(response.getOutputStream(), fileList); }我怎么将String[]中的死值写成我另外一个实体中的值
时间: 2024-04-06 09:30:25 浏览: 21
你可以通过读取实体中的值来替换掉硬编码的文件路径,例如:
public void download(HttpServletResponse response, YourEntity entity) throws IOException {
String[] filePath = new String[]{entity.getPath1(), entity.getPath2(), entity.getPath3()};
List<File> fileList = new ArrayList<>();
for (String s : filePath) {
File file = new File(s);
fileList.add(file);
}
response.setHeader("content-type", "application/octet-stream");
response.setContentType("application/octet-stream");
response.setHeader(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=download.zip");
ZipUtils.downloadZip(response.getOutputStream(), fileList);
}
这样,你就可以调用 download 方法并传入一个实体对象,其中包含需要下载的文件路径。
相关问题
@RequestMapping("download") public void download(HttpServletResponse response ,TbQrCode pojo) throws IOException { List<TbQrCode> list = qrCodeService.getList(pojo, null); String[] filePath = new String[]{}; List<File> fileList = new ArrayList<>(); for (String s : filePath) { File file = new File(s); fileList.add(file); } response.setHeader("content-type", "application/octet-stream"); response.setContentType("application/octet-stream"); response.setHeader(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=download.zip"); ZipUtils.downloadZip(response.getOutputStream(), fileList); }我怎么将TbQrCode中的ImageUrl放在String[]{}中
您可以在获取TbQrCode列表时,遍历每个TbQrCode对象,将它们的ImageUrl属性添加到String数组中,示例代码如下:
```
List<TbQrCode> list = qrCodeService.getList(pojo, null);
List<File> fileList = new ArrayList<>();
String[] filePath = new String[list.size()];
for (int i = 0; i < list.size(); i++) {
TbQrCode qrCode = list.get(i);
filePath[i] = qrCode.getImageUrl();
fileList.add(new File(qrCode.getImageUrl()));
}
```
此代码将TbQrCode对象的ImageUrl属性添加到了一个String数组中,并将对应的文件添加到了文件列表中。您可以将此代码插入到您的方法中。
ILLEGAL_STRING : Required request body is missing: public org.sprin....
这个错误通常是由于在使用`@RequestBody`注解时,请求体为空导致的。在Spring MVC中,`@RequestBody`注解用于将HTTP请求正文绑定到方法参数上。如果请求正文为空,则会抛出`MissingServletRequestParameterException`异常,错误消息为“Required request body is missing”。以下是解决此问题的一些方法:
1. 确保请求正文不为空。可以使用Postman等工具检查请求正文是否正确。
2. 确保使用`@RequestBody`注解的方法的Content-Type与请求正文的Content-Type匹配。例如,如果请求正文是JSON格式,则Content-Type应为application/json。
3. 确保使用`@RequestBody`注解的方法的参数类型正确。例如,如果请求正文是JSON格式,则参数类型应为Java对象,该对象的属性应该与JSON对象的属性相匹配。
以下是一个使用`RequestResponseBodyMethodProcessor`处理`@RequestBody`注解的示例:
```java
@RestController
public class MyController {
@Autowired
private RequestResponseBodyMethodProcessor processor;
@PostMapping("/myEndpoint")
public ResponseEntity<?> myEndpoint(HttpServletRequest request, HttpServletResponse response) throws Exception {
MethodParameter parameter = new MethodParameter(MyController.class.getMethod("myEndpoint", HttpServletRequest.class, HttpServletResponse.class), 0);
Object requestBody = processor.resolveArgument(parameter, null, request, response);
// 处理请求正文
return ResponseEntity.ok().build();
}
}
```