Spring中servletFileUpload完成上传文件以及文本的处理

JSP:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
            <form action="test.do" method="post" enctype="multipart/form-data">
                                                    名字:<input name="username" type="text"><br />
                <input name="imgFile" id="imgFile" type="file" /><br />
                <input type="submit" value="提交">
            </form>
</body>
</html>

　　JAVA:

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.CriteriaDefinition;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class tt
{
    @RequestMapping(value = "test")
    public void test(HttpServletRequest request)
    {
        boolean flag = ServletFileUpload.isMultipartContent(request);

        if (flag)
        {
            DiskFileItemFactory factory = new DiskFileItemFactory();
            ServletFileUpload upload = new ServletFileUpload(factory);
            try
            {
                // 解析request请求
                List<FileItem> list = upload.parseRequest(request);
                for (FileItem item : list)
                {
                    System.out.println(item);

                    String fileName = item.getFieldName();
                    // 判断是否是普通的输入项
                    if (item.isFormField())
                    {
                        // 解析文本
                        if (fileName.equals("username"))
                        {
                            try
                            {
                                String username = item.getString("UTF-8");
                                System.out.println(username);
                            }
                            catch (UnsupportedEncodingException e)
                            {
                                e.printStackTrace();
                            }
                        }
                    }
                    // 上传图片
                    if (!item.isFormField())
                    {
                        InputStream in = null;
                        FileOutputStream out = null;
                        try
                        {
                            in = item.getInputStream();
                            out = new FileOutputStream(new File("E:/test.txt"));

                            byte[] buff = new byte[1024];
                            int len = 0;
                            while ((len = in.read(buff)) != -1)
                            {
                                out.write(buff, 0, len);
                            }
                        }
                        catch (IOException e)
                        {
                            e.printStackTrace();
                        }
                        finally
                        {
                            if (in != null)
                            {
                                try
                                {
                                    in.close();
                                }
                                catch (IOException e)
                                {
                                    e.printStackTrace();
                                }
                                finally
                                {
                                    if (out != null)
                                    {
                                        try
                                        {
                                            out.close();
                                        }
                                        catch (IOException e)
                                        {
                                            e.printStackTrace();
                                        }
                                    }
                                }
                            }

                        }
                    }
                }
            }
            catch (FileUploadException e)
            {
                e.printStackTrace();
            }

        }

    }
}

　　在Spring中不用配置:否则会导致request请求两次解析造成解析为空值的问题(详情可以参考:http://blog.csdn.net/lwphk/article/details/43015829)

<!-- 支持上传文件 -->
 <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
		<property name="maxUploadSize" value ="1024" />
		<property name="resolveLazily" value="true"/>
        <property name="defaultEncoding" value = "UTF-8" />