Spring中servletFileUpload完成上传文件以及文本的处理

时间：2023-01-27 21:10:23

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" />

　　

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