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这篇文章主要介绍“如何使用SpringMVC接收文件流上传和表单参数”的相关知识，小编通过实际案例向大家展示操作过程，操作方法简单快捷，实用性强，希望这篇“如何使用SpringMVC接收文件流上传和表单参数”文章能帮助大家解决问题。
在SpringMVC中，接收文件流非常简单，我们可以写个接口用来接收一些文件，同时还可以接收表单参数。
代码参考如下：
/**
* 接收文件流
*
* @param request 请求
* @return OK
*/
@RequestMapping(value = "/receive/file", method = POST)
public String receiveFile(HttpServletRequest request) {
// 转换为 MultipartHttpServletRequest
if (request instanceof MultipartHttpServletRequest) {
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
// 通过表单中的参数名来接收文件流（可用 file.getInputStream() 来接收输入流）
MultipartFile file = multipartRequest.getFile("file");
System.out.println("上传的文件名称:" + file.getOriginalFilename());
System.out.println("上传的文件大小:" + file.getSize());
// 接收其他表单参数
String name = multipartRequest.getParameter("name");
String content = multipartRequest.getParameter("content");
System.out.println("name:" + name);
System.out.println("content:" + content);
return "OK";
} else {
return "不是 MultipartHttpServletRequest";
}
}<form action="http://127.0.0.1:8080/receive/file" method="post" enctype="multipart/form-data"> <input type="file" name="file" id="file"> <input type="text" name="content" value="内容"> <input type="text" name="name" value="名称"> <button type="submit">提交请求</button> </form>
http client版本4.1.1
spring版本3.2.11
在这个例子里面我接收了文件，并转发给另一个机器，其实接收的时候文件的流已经拿到了，想保存到本地，或者对文件分析，自己可以斟酌。
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <context:component-scan base-package="com"/> <!-- if you use annotation you must configure following setting --> <mvc:annotation-driven/> <bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/> <!-- 处理JSON --> <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/html;charset=UTF-8</value> </list> </property> </bean> <mvc:default-servlet-handler/> <!-- 日志输出拦截器 --> <mvc:interceptors> <bean class="com.steward.interceptor.AccessInteceptor"> <property name="accessLog"> <value>true</value> </property> </bean> </mvc:interceptors> <!-- 解析器 --> <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver"> <property name="mediaTypes"> <map> <entry key="html" value="text/html"/> <entry key="json" value="application/json"/> </map> </property> <property name="viewResolvers"> <list> <ref bean="viewResolver"/> </list> </property> <property name="defaultViews"> <list> <bean class="org.springframework.web.servlet.view.json.MappingJackson2JsonView"/> </list> </property> </bean> <!-- 异常处理 --> <bean id="exceptionHandler" class="com.steward.exception.ExceptionHandler"/> <!-- 文件上传 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/> <!-- 配置freeMarker的模板路径 --> <bean id="viewResolver" class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.freemarker.FreeMarkerView"></property> <property name="suffix" value=".html"></property> <property name="contentType" value="text/html;charset=UTF-8"/> <property name="requestContextAttribute" value="rc"></property> </bean> <bean id="freemarkerConfig" class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer"> <property name="templateLoaderPath" value="/WEB-INF/templates/"></property> <property name="freemarkerSettings"> <props> <prop key="template_update_delay">0</prop> <prop key="default_encoding">UTF-8</prop> <prop key="locale">zh_CN</prop> <prop key="number_format">0.##########</prop> <prop key="template_exception_handler">ignore</prop> </props> </property> <property name="freemarkerVariables"> <map> <entry key="getVersion" value-ref="getVersion"/> </map> </property> </bean> <bean id="getVersion" class="com.steward.freemarker.GetVersion"/> </beans>
@RequestMapping(value = "/uploadFile", method = RequestMethod.POST)
@ResponseBody
public String uploadFile(HttpServletRequest request) throws Exception {
FileOutputStream fos = null;
InputStream in = null;
String fileUrl = null;
try {
//将当前上下文初始化给 CommonsMutipartResolver （多部分解析器）
CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());
//检查form中是否有enctype="multipart/form-data"
if (multipartResolver.isMultipart(request)) {
//将request变成多部分request
MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;
//获取multiRequest 中所有的文件名
Iterator iterator = multiRequest.getFileNames();
while (iterator.hasNext()) {
MultipartFile multipartFile = multiRequest.getFile(iterator.next().toString());
in = multipartFile.getInputStream();
File file = new File(multipartFile.getOriginalFilename());
fos = new FileOutputStream(file);
byte[] buff = new byte[1024];
int len = 0;
while ((len = in.read(buff)) > 0) {
fos.write(buff, 0, len);
}
String uploadUrl = platformHttpsDomain + "/uploadFile";
HttpPost post = new HttpPost(uploadUrl);
HttpClient httpclient = new DefaultHttpClient();
MultipartEntity reqEntity = new MultipartEntity();
reqEntity.addPart("file", new FileBody(file));
post.setEntity(reqEntity);
HttpResponse response = httpclient.execute(post);
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode == HttpStatus.SC_OK) {
fileUrl = EntityUtils.toString(response.getEntity());
}
file.deleteOnExit();
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
}
}
if (in != null) {
try {
in.close();
} catch (IOException e) {
}
}
}
return fileUrl;
}关于“如何使用SpringMVC接收文件流上传和表单参数”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识，可以关注亿速云行业资讯频道，小编每天都会为大家更新不同的知识点。
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