springboot-项⽬获取resources下⽂件碰到的问题（classPath下不。
。。
项⽬是spring-boot + spring-cloud 并使⽤maven 管理依赖。在springboot+maven项⽬下怎么读取resources下的⽂件实现⽂件下载？
怎么获取resources⽬录下的⽂件？（相对路径）
⽅法⼀：
File sourceFile = File("classpath:templateFile/test.xlsx"); //这种⽅法在linux下⽆法⼯作
⽅法⼆：
Resource resource = new ClassPathResource("templateFile/test.xlsx"); File sourceFile = File();
我使⽤的是第⼆种。
1 @PostMapping("/downloadTemplateFile")
2public JSONData downloadTemplateFile(HttpServletResponse response) {
3 String filePath = "templateFile/test.xlsx";
4 Resource resource = new ClassPathResource(filePath);//⽤来读取resources下的⽂件
5 InputStream is = null;
6 BufferedInputStream bis = null;
7 OutputStream os = null;
8try {
9 File file = File();
10if (!ists()) {
11return new JSONData(false,"模板⽂件不存在");
12 }
13 is = new FileInputStream(file);
14 os = OutputStream();
15 bis = new BufferedInputStream(is);
16//设置响应头信息
17 response.setCharacterEncoding("UTF-8");
19 StringBuffer contentDisposition = new StringBuffer("attachment; filename=\"");
20 String fileName = new Name().getBytes(), "utf-8");
21 contentDisposition.append(fileName).append("\"");
23//边读边写
24byte[] buffer = new byte[500];
25int i;
26while ((i = ad(buffer)) != -1) {
27 os.write(buffer, 0, i);
28 }
29 os.flush();
30 } catch (FileNotFoundException e) {
31 e.printStackTrace();
32return new JSONData(false,"模板⽂件不存在");
33 } catch (IOException e) {
34 e.printStackTrace();
35 } finally {
36try {
37if(os != null) os.close();
38if(bis != null) bis.close();
39if(is != null) is.close();
40 } catch (IOException e) {
41 e.printStackTrace();
42 }
43 }
44return new JSONData("模板⽂件下载成功");
45 }
⾼⾼兴兴的启动项⽬后发现还是不到⽂件，错误⽇志：
1 java.io.FileNotFoundException: class path resource [templateFile/test.xlsx] cannot be resolved to URL because it does not exist
2 at URL(ClassPathResource.java:195)
3 at File(AbstractFileResolvingResource.java:129)
4 at com.citycloud.ller.operate.OperateBusinessUserController.downloadTemplateFile(OperateBusinessUserController.java:215)
5 flect.NativeMethodAccessorImpl.invoke0(Native Method)
6 flect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
7 flect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
8 at flect.Method.invoke(Method.java:498)
9 at org.hod.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209)
10 at org.hod.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
11 at org.springframework.web.hod.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
12 at org.springframework.web.hod.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:877)
13 at org.springframework.web.hod.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:783)
14 at org.springframework.web.hod.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
15 at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991)
16 at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
17 at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974)
18 at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:877)
19 at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
20 at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851)
21 at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
22 at org.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
23 at org.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
24 at at.websocket.server.WsFilter.doFilter(WsFilter.java:52)
25 at org.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
26 at org.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
27 at org.springframework.ics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:158)
28 at org.springframework.ics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:126)
29 at org.springframework.ics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:111)
30 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
31 at org.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
因为我知道Resource resource = new ClassPathResource("templateFile/test.xlsx")；就是到classPath*（注意这⾥有个*）下去，然后就去项⽬本地的⽬录下classPath下是否有这个⽂件（maven的classPath在 “target\classes”⽬录下），就发现并没有这个⽂件在。
后⾯仔细想想这是Maven项⽬啊，所以就l⽂件去看看，突然想起：springboot的maven默认只会加载classPath同级⽬录下⽂件（配置那些），其他的需要配置<resources>标签：
1 <build>
2 <resources>
3 <resource>
4 <directory>src/main/java</directory>
5 <includes>
6 <include>**/*.properties</include>
7 <include>**/*.xml</include>
8 </includes>
9 <!--是否替换资源中的属性-->
10 <filtering>false</filtering>
11 </resource>
12 <resource>
13 <directory>src/main/resources</directory>
14 <includes>
15 <include>**/*.properties</include>
16 <include>**/*.xml</include>
17 <include>**/*.yml</include>
18 <include>**/Dockerfile</include>
19<include>**/*.xlsx</include>
20 </includes>
21 <!--是否替换资源中的属性-->
22 <filtering>false</filtering>
23 </resource>
24 </resources>
25</build>
重新启动，再到classPath下看，发现有了这个⽂件了，同时也能获取了。如果⽂件名为中⽂的话就会出现乱码的情况。
怎么解决⽂件名中⽂乱码？
1 Access-Control-Allow-Origin →*
2 Access-Control-Allow-Credentials →true
3 Access-Control-Allow-Headers →accessToken,Access-Control-Allow-Origin,Content-Type,X-Requested-With,accept,Origin,Access-Control-Request-Method,Access-Control-Request-Headers
4 Access-Control-Allow-Methods →POST,GET,PUT,PATCH,DELETE,OPTIONS,HEAD
5 Access-Control-Max-Age →360
6 Content-disposition →attachment; filename="-??.xlsx"
7 Content-Type →application/octet-stream;charset=UTF-8
springcloud和springboot8 Transfer-Encoding →chunked
9 Date →Fri, 19 Apr 2019 06:47:34 GMT
上⾯是使⽤postman测试中⽂乱码response响应头相关信息。
后⾯怎么改都乱码，然后我就试着到浏览器中请求试试，结果发现只是postman的原因，只要⽂件名编码跟返回内容编码⼀致（"Content-disposition"和“ContentType”）就⾏：
2 StringBuffer contentDisposition = new StringBuffer("attachment; filename=\"");
3 String fileName = Name();
4 contentDisposition.append(fileName).append("\"");
5//设置⽂件名编码
6 String contentDispositionStr = new String().getBytes(), "iso-8859-1");
到此全部结束！
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