java Spring引导，通过POST从InputStream上载文件期间RestTemplate异常
我正在用我的好友应用程序写作，该应用程序收集求职信息，并可以手动申请
例如，我从这个页面获取CSRF令牌Click，因为我需要CSRF来上传文件
但当我试图执行restTemplate时。exchange（）我收到错误消息： “原因：java.lang.ClassCastException:org.springframework.core.io.ByteArrayResource无法转换为java.lang.String “
这是我的班级：
@Data
@Service
class StackOverflowComAcceptor implements JobOfferService {
private final static String BASE_URL = "http://stackoverflow.com";
private final ConnectionService2 connectionService2;
private final StackOverflowComFactory stackOverflowComFactory;
private final RestTemplate restTemplate;
@Autowired
private CVProvider cvProvider;
@Override
@SneakyThrows
public void accept(JobOffer jobOffer) {
//List<Connection.KeyVal> templateDataEntries = stackOverflowComFactory.create();
ConnectionRequest connectionRequest = ConnectionRequest
.builder()
//url is in joboffer
.url("http://stackoverflow.com/jobs/apply/110247")
.method(Connection.Method.GET)
.data(new ArrayList<Connection.KeyVal>() )
.build();
ConnectionResponse submit1 = connectionService2.submit(connectionRequest);
Document document = submit1.getDocument();
String csrf = extractCSRF(document);
String cvurl = "http://stackoverflow.com/jobs/apply/upload-resume";
//String cvurl = "http://stackoverflow.com/jobs/apply/upload-resume?jobId=110247&fkey=" + csrf;
InputStream inputStream = cvProvider.asInputStream();
byte[] bytes = IOUtils.toByteArray(inputStream);
Map<String, String> uriVariables = new HashMap<>();
uriVariables.put("fkey", csrf);
uriVariables.put("jobId", "110247");
HttpHeaders partHeaders = new HttpHeaders();
partHeaders.setContentType(MediaType.APPLICATION_OCTET_STREAM);
ByteArrayResource byteArrayResource = new ByteArrayResource(bytes, "test.pdf");
MultiValueMap<String, Object> data = new LinkedMultiValueMap<>();
data.add("qqfile", byteArrayResource);
HttpEntity<MultiValueMap<String, Object>> requestEntity =
new HttpEntity<>(data, partHeaders);
ByteArrayHttpMessageConverter byteArrayHttpMessageConverter = new ByteArrayHttpMessageConverter();
// byteArrayHttpMessageConverter.setSupportedMediaTypes(Arrays.asList(new MediaType[]{MediaType
// .APPLICATION_OCTET_STREAM}));
FormHttpMessageConverter formHttpMessageConverter = new FormHttpMessageConverter();
formHttpMessageConverter.setSupportedMediaTypes(Arrays.asList(
new MediaType[]{MediaType.APPLICATION_OCTET_STREAM}));
//restTemplate.getMessageConverters().add(byteArrayHttpMessageConverter);
restTemplate.getMessageConverters().add(formHttpMessageConverter);
ResponseEntity<Object> model = restTemplate.exchange(cvurl, HttpMethod.POST, requestEntity, Object.class ,
uriVariables);
System.out.println(model);
}
private String extractCSRF(Document document) {
String s = document.getElementsByTag("script").get(0).toString();
Pattern p = Pattern.compile("Careers.XSRF_KEY = \\\"([a-z0-9]{32})\\\""); // Regex for the value of the key
Matcher m = p.matcher(s);
String csrf = null;
while( m.find() )
{
csrf = m.group(1); // value only
}
System.out.println(csrf);
return csrf;
}
}
这是我的stacktrace：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'testStacka' defined in file [D:\WWW\Epomis\epomis\build\classes\main\net\elenx\epomis\service\com\stackoverflow\Test.class]: Invocation of init method failed; nested exception is java.lang.ClassCastException: org.springframework.core.io.ByteArrayResource cannot be cast to java.lang.String
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1583) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:751) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.4.1.BUILD-SNAPSHOT.jar:1.4.1.BUILD-SNAPSHOT]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:761) ~[spring-boot-1.4.1.BUILD-SNAPSHOT.jar:1.4.1.BUILD-SNAPSHOT]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:371) ~[spring-boot-1.4.1.BUILD-SNAPSHOT.jar:1.4.1.BUILD-SNAPSHOT]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) ~[spring-boot-1.4.1.BUILD-SNAPSHOT.jar:1.4.1.BUILD-SNAPSHOT]
at net.elenx.Epomis.main(Epomis.java:22) [main/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_74]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_74]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_74]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_74]
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) [idea_rt.jar:na]
Caused by: java.lang.ClassCastException: org.springframework.core.io.ByteArrayResource cannot be cast to java.lang.String
at org.springframework.http.converter.FormHttpMessageConverter.writeForm(FormHttpMessageConverter.java:292) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.http.converter.FormHttpMessageConverter.write(FormHttpMessageConverter.java:254) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.http.converter.FormHttpMessageConverter.write(FormHttpMessageConverter.java:89) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.web.client.RestTemplate$HttpEntityRequestCallback.doWithRequest(RestTemplate.java:849) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:617) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:588) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:507) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at net.elenx.epomis.service.com.stackoverflow.StackOverflowComAcceptor.accept(StackOverflowComAcceptor.java:99) ~[main/:na]
at net.elenx.epomis.service.com.stackoverflow.Test.afterPropertiesSet(Test.java:40) ~[main/:na]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1642) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1579) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
... 19 common frames omitted
Process finished with exit code 1
有什么办法解决这个问题吗
# 1 楼答案
显然，强制转换存在一些问题，您试图将FileMessageResource强制转换为字符串。这不一定是明确发生的。你能添加堆栈跟踪吗
好的，我给你准备了一件外套，即使是两件，也要选一件你最喜欢的
HttpEntity<MultiValueMap<String, Object>>，因为 有一个构造函数允许传递任何对象，因此您可以 考虑使用简单的{{CD2}}，记住通过 byteArrayResource。getByteArray（）如果你决定接受这个 接近MultiValueMap<String, Object>仅适用于多部分内容类型。否则，地图将被强制转换为MultiValueMap<String, String>，因此在运行 应用要摆脱它，只需将内容类型从partHeaders.setContentType(MediaType.APPLICATION_OCTET_STREAM);到partHeaders.setContentType(MediaType.MULTIPART_FORM_DATA);