我正在尝试从java spring控制器调用web服务。以下是代码
private void storeImages(MultipartHttpServletRequest multipartRequest) {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost postRequest = new HttpPost(
"http://localhost:8080/dream/storeimages.htm");
MultipartFile multipartFile1 = multipartRequest.getFile("file1");
MultipartEntity multipartEntity = new MultipartEntity(
HttpMultipartMode.BROWSER_COMPATIBLE);
multipartEntity.addPart("file1",
new ByteArrayBody(multipartFile1.getBytes(),
multipartFile1.getContentType(),
multipartFile1.getOriginalFilename()));
postRequest.setEntity(multipartEntity);
HttpResponse response = httpClient.execute(postRequest);
if (response.getStatusLine().getStatusCode() != 201) {
throw new RuntimeException("Failed : HTTP error code : "
+ response.getStatusLine().getStatusCode());
}
}
以上只是部分代码。我试图确定如何在服务器端检索此。在服务器端，我有以下Spring控制器代码
@RequestMapping(value = "/storeimages.htm", method = RequestMethod.POST)
public ModelAndView postItem(HttpServletRequest request,
HttpServletResponse response) {
logger.info("Inside /secure/additem/postitem.htm");
try {
// How to get the MultipartEntity object here. More specifically i
// want to get back the Byte array from it
} catch (Exception ex) {
ex.printStackTrace();
}
return new ModelAndView("success");
}
我执行了这段代码，我的控制权将转到服务器端。但我仍然坚持如何从multipartentity对象返回字节数组。
编辑要求： 这是要求。用户从网站上传图像（这已完成并正常工作）控件在表单提交后转到Spring控制器（这已完成并正常工作）在Spring控制器中我使用Multipart来获取表单的内容。 （这已经完成并正常工作）现在我想调用一个web服务，它将图像字节数组发送到图像服务器。（这需要完成）在图像服务器上，我想接收这个webservice请求从HTTPServlerRequest获取所有字段，存储图像并返回（这需要完成）
答案 0 :(得分：5)
终于解决了。这对我有用。
客户端
private void storeImages(HashMap<String, MultipartFile> imageList) {
try {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost postRequest = new HttpPost("http://localhost:8080/dream/storeimages.htm");
MultipartEntity multipartEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
Set set = imageList.entrySet();
Iterator i = set.iterator();
while(i.hasNext()) {
Map.Entry me = (Map.Entry)i.next();
String fileName = (String)me.getKey();
MultipartFile multipartFile = (MultipartFile)me.getValue();
multipartEntity.addPart(fileName, new ByteArrayBody(multipartFile.getBytes(),
multipartFile.getContentType(), multipartFile.getOriginalFilename()));
}
postRequest.setEntity(multipartEntity);
HttpResponse response = httpClient.execute(postRequest);
if (response.getStatusLine().getStatusCode() != 200) {
throw new RuntimeException("Failed : HTTP error code : "
+ response.getStatusLine().getStatusCode());
}
BufferedReader br = new BufferedReader(new InputStreamReader((response.getEntity().getContent())));
String output;
while ((output = br.readLine()) != null) {
logger.info("Webservices output - " + output);
}
httpClient.getConnectionManager().shutdown();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
服务器端
@RequestMapping(value = "/storeimages.htm", method = RequestMethod.POST)
public void storeimages(HttpServletRequest request, HttpServletResponse response)
{
logger.info("Inside /secure/additem/postitem.htm");
try
{
//List<Part> formData = new ArrayList(request.getParts());
//Part part = formData.get(0);
//Part part = request.getPart("file1");
//String parameterName = part.getName();
//logger.info("STORC IMAGES - " + parameterName);
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
Set set = multipartRequest.getFileMap().entrySet();
Iterator i = set.iterator();
while(i.hasNext()) {
Map.Entry me = (Map.Entry)i.next();
String fileName = (String)me.getKey();
MultipartFile multipartFile = (MultipartFile)me.getValue();
logger.info("Original fileName - " + multipartFile.getOriginalFilename());
logger.info("fileName - " + fileName);
writeToDisk(fileName, multipartFile);
}
}
catch(Exception ex)
{
ex.printStackTrace();
}
}
public void writeToDisk(String filename, MultipartFile multipartFile)
{
try
{
String fullFileName = Configuration.getProperty("ImageDirectory") + filename;
FileOutputStream fos = new FileOutputStream(fullFileName);
fos.write(multipartFile.getBytes());
fos.close();
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
答案 1 :(得分：2)
在我的项目中，我们过去常常使用com.oreilly.servlets中的MultipartParser来处理与HttpServletRequests请求相对应的multipart，如下所示：
// Should be able to handle multipart requests upto 1GB size.
MultipartParser parser = new MultipartParser(aReq, 1024 * 1024 * 1024);
// If the content type is not multipart/form-data, this will be null.
if (parser != null) {
Part part;
while ((part = parser.readNextPart()) != null) {
if (part instanceof FilePart) {
// This is an attachment or an uploaded file.
}
else if (part instanceof ParamPart) {
// This is request parameter from the query string
}
}
}
希望这有帮助。
答案 2 :(得分：2)
您可以使用Springs Mutlipart支持
，而不是手动完成所有操作控制器可以这样工作（此示例使用命令对象存储其他用户输入 - （这是工作项目中的示例））。
@RequestMapping(method = RequestMethod.POST)
public ModelAndView create(@Valid final DocumentCreateCommand documentCreateCommand,
final BindingResult bindingResult) throws IOException {
if (bindingResult.hasErrors()) {
return new ModelAndView("documents/create", "documentCreateCommand", documentCreateCommand);
} else {
Document document = this.documentService.storeDocument(
documentCreateCommand.getContent().getBytes(),
StringUtils.getFilename(StringUtils.cleanPath(documentCreateCommand.getContent().getOriginalFilename())));
//org.springframework.util.StringUtils
return redirectToShow(document);
}
}
@ScriptAssert(script = "_this.content.size>0", lang = "javascript", message = "{validation.Document.message.notDefined}")
public class DocumentCreateCommand {
@NotNull private org.springframework.web.multipart.MultipartFile content;
Getter/Setter
}
要启用Spring Multipart支持，您需要配置一些内容：
web.xml（在CharacterEncodingFilter之后和HttpMethodFilter之前添加org.springframework.web.multipart.support.MultipartFilter）
<filter>
<filter-name>MultipartFilter</filter-name>
<filter-class>org.springframework.web.multipart.support.MultipartFilter</filter-class>
<!-- uses the bean: filterMultipartResolver -->
</filter>
<filter-mapping>
<filter-name>MultipartFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
在您的应用程序的CORE（而不是MVC Servlet）的Spring配置中添加此
<!-- allows for integration of file upload functionality, used by an filter configured in the web.xml -->
<bean class="org.springframework.web.multipart.commons.CommonsMultipartResolver" id="filterMultipartResolver" name="filterMultipartResolver">
<property name="maxUploadSize" value="100000000"/>
</bean>
然后你还需要commons fileupload libary，因为Spring MultipartFile只是某种Addapter
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.2.1</version>
</dependency>
更多细节： @See Spring Reference, Chapter 15.8 Spring's multipart (fileupload) support
答案 3 :(得分：0)
将spring文件处理到控制器。你需要在你的app-config.xml中指明如下：
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/>
并按如下方式处理代码
MultipartEntityBuilder paramsBuilder = MultipartEntityBuilder.create();
Charset chars = Charset.forName("UTF-8");
paramsBuilder.setCharset(chars);
if (null != obj.getFile()){
FileBody fb = new FileBody(obj.getFile());
paramsBuilder.addPart("file", fb);
}
这是红色的多部分
private File getFile(MultipartFile file) {
try {
File fichero = new File(file.getOriginalFilename());
fichero.createNewFile();
FileOutputStream fos = new FileOutputStream(fichero);
fos.write(file.getBytes());
fos.close();
return fichero;
} catch (Exception e) {
return null;
}
}
我希望这会有所帮助。