接收文件流上传和表单参数
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：
JAVA服务端代码
@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";
}
}
HTML页面代码
<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>SpringMVC接收文件上传,并对文件做处理
- 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。
springmvc配置
<?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>
controller代码如下
@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;
}
以上为个人经验，希望能给大家一个参考，也希望大家多多支持编程网。
