相关疑难解决方法(0)

如何使用JSP/Servlet将文件上传到服务器？我试过这个:

<form action="upload" method="post">
    <input type="text" name="description" />
    <input type="file" name="file" />
    <input type="submit" />
</form>

但是,我只获取文件名,而不是文件内容.当我添加 enctype="multipart/form-data"到<form>,然后request.getParameter()返回null.

在研究期间,我偶然发现了Apache Common FileUpload.我试过这个:

FileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
List items = upload.parseRequest(request); // This line is where it died.

不幸的是,servlet抛出了一个没有明确消息和原因的异常.这是堆栈跟踪:

SEVERE: Servlet.service() for servlet UploadServlet threw exception
javax.servlet.ServletException: Servlet execution threw an exception
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:313)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at …

我有一个java servlet,它接受用户上传到我的web应用程序的图像.

我有另一台服务器(运行php),它将托管所有图像.如何从我的jsp服务器获取图像到我的php服务器？流程将是这样的:

public class ServletImgUpload extends HttpServlet 
{   
    public void doPost(HttpServletRequest req, HttpServletResponse resp) 
      throws ServletException, IOException 
    {
        // get image user submitted
        // try sending it to my php server now
        // return success or failure message back to user
    }
}

谢谢