前台页面
function ajaxFileUpload(){
//开始上传文件时显示一个图片,文件上传完成将图片隐藏
//$("#loading").ajaxStart(function(){$(this).show();}).ajaxComplete(function(){$(this).hide();});
//执行上传文件操作的函数
$.ajaxFileUpload({
//处理文件上传操作的服务器端地址(可以传参数,已亲测可用)
url:'test/fileUpload?uname=玄玉',
secureuri:false, //是否启用安全提交,默认为false
fileElementId:'myBlogImage', //文件选择框的id属性
dataType:'text', //服务器返回的格式,可以是json或xml等
success:function(data, status){ //服务器响应成功时的处理函数
data = data.replace(/<pre.*?>/g, ''); //ajaxFileUpload会对服务器响应回来的text内容加上<pre style="....">text</pre>前后缀
data = data.replace(/<PRE.*?>/g, '');
data = data.replace("<PRE>", '');
data = data.replace("</PRE>", '');
data = data.replace("<pre>", '');
data = data.replace("</pre>", ''); //本例中设定上传文件完毕后,服务端会返回给前台[0`filepath]
if(data.substring(0, 1) == 0){ //0表示上传成功(后跟上传后的文件路径),1表示失败(后跟失败描述)
$("img[id='uploadImage']").attr("src", data.substring(2));
$('#result').html("图片上传成功<br/>");
}else{
$('#result').html('图片上传失败，请重试！！');
}
},
error:function(data, status, e){ //服务器响应失败时的处理函数
$('#result').html('图片上传失败，请重试！！');
}
});
}
</script>
<div id="result"></div>
<img id="uploadImage" src="http://www.firefox.com.cn/favicon.ico">
<input type="file" id="myBlogImage" name="myfiles"/>
<input type="button" value="上传图片" onclick="ajaxFileUpload()"/>
@Controller
@RequestMapping("/test")
public class FileUploadController {
/**
* 这里这里用的是MultipartFile[] myfiles参数,所以前台就要用<input type="file" name="myfiles"/>
* 上传文件完毕后返回给前台[0`filepath],0表示上传成功(后跟上传后的文件路径),1表示失败(后跟失败描述)
*/
@RequestMapping(value="/fileUpload",method = RequestMethod.POST)
public String addUser(@RequestParam MultipartFile[] myfiles, @RequestParam("uname") String uname, HttpServletRequest request, HttpServletResponse response) throws IOException{
异常
严重: Servlet.service() for servlet [Spring] in context with path [/xxt] threw exception [Required MultipartFile[] parameter 'myfiles' is not present] with root cause
org.springframework.web.bind.MissingServletRequestParameterException: Required MultipartFile[] parameter 'myfiles' is not present
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.raiseMissingParameterException(AnnotationMethodHandlerAdapter.java:779)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolveRequestParam(HandlerMethodInvoker.java:509)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolveHandlerArguments(HandlerMethodInvoker.java:348)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:171)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:440)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:428)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:838)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.springframework.orm.hibernate4.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:152)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:315)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
------解决思路----------------------
在web.xml里面配置一下
<!-- 配置文件上传的实现类 -->
<servlet>
<servlet-name>UploadHandlerServlet</servlet-name>
<servlet-class>com.ctgu.controller.UploadHandlerServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>UploadHandlerServlet</servlet-name>
<url-pattern>/servlet/UploadHandleServlet</url-pattern>
</servlet-mapping>
------解决思路----------------------
form标签，写了enctype="multipart/form-data" 了吗？
<form method="POST" action="。。。。。。" enctype="multipart/form-data">
------解决思路----------------------
楼主可以去看看这个
http://blog.sina.com.cn/s/blog_4fa82d6c01016rts.html