多图片上传

pom

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>com.ylht.parent</groupId>
        <artifactId>ylht-parent</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <groupId>com.ylht.demo</groupId>
    <artifactId>ylht-demo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <dependencies>
        <!-- MySql -->
        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>


        <!-- Jackson Json处理工具包 -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.jolbox/bonecp-spring -->
        <dependency>
            <groupId>com.jolbox</groupId>
            <artifactId>bonecp-spring</artifactId>
        </dependency>

        <!-- JSP相关 -->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jsp-api</artifactId>
            <scope>provided</scope>
        </dependency>

        <!--文件上传-->
        <!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.3</version>
        </dependency>

        <!--spring-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
        </dependency>

        <!--分页插件-->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
        </dependency>
        <dependency>
            <groupId>com.github.jsqlparser</groupId>
            <artifactId>jsqlparser</artifactId>
        </dependency>

        <!--redis.clients-->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>2.6.0</version>
        </dependency>

        <!--MQ-->
        <dependency>
            <groupId>com.rabbitmq</groupId>
            <artifactId>amqp-client</artifactId>
            <version>3.4.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.amqp</groupId>
            <artifactId>spring-rabbit</artifactId>
            <version>1.4.0.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>javax.persistence</groupId>
            <artifactId>persistence-api</artifactId>
            <version>1.0</version>
        </dependency>

        <!-- Mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
        </dependency>

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
        </dependency>

        <!--通用mapper-->
        <dependency>
            <groupId>com.github.abel533</groupId>
            <artifactId>mapper</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>javax.persistence</groupId>
                    <artifactId>persistence-api</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
        </dependency>

        <!-- Apache工具组件 -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-io</artifactId>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>RELEASE</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/commons-codec/commons-codec -->
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/joda-time/joda-time -->
        <dependency>
            <groupId>joda-time</groupId>
            <artifactId>joda-time</artifactId>
            <version>2.5</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
                <configuration>
                    <port>8082</port>
                    <path>/</path>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

spirngmvc添加

<!-- springMVC上传文件时，需要配置MultipartResolver处理器 -->
    <bean id="multipartResolver"
          class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="defaultEncoding" value="utf-8"></property>
        <property name="maxUploadSize" value="10485760000"></property>
        <property name="maxInMemorySize" value="40960"></property>
    </bean>

fileUpload.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <script type="text/javascript" src="../../js/jquery-3.3.1.min.js"></script>
    <script type="text/javascript">
        function showImage() {
            var docObj = document.getElementById("doc");
            var imgObjPreview = document.getElementById("preview");
            if (docObj.files && docObj.files[0]) {
                //火狐下，直接设img属性
                imgObjPreview.style.display = 'block';
                imgObjPreview.style.width = '300px';
                imgObjPreview.style.height = '120px';
                //imgObjPreview.src = docObj.files[0].getAsDataURL();
                //火狐7以上版本不能用上面的getAsDataURL()方式获取，需要一下方式
                imgObjPreview.src = window.URL.createObjectURL(docObj.files[0]);
            } else {
                //IE下，使用滤镜
                docObj.select();
                var imgSrc = document.selection.createRange().text;
                var localImagId = document.getElementById("localImag");
                //必须设置初始大小
                localImagId.style.width = "250px";
                localImagId.style.height = "200px";
                //图片异常的捕捉，防止用户修改后缀来伪造图片
                try {
                    localImagId.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)";
                    localImagId.filters
                        .item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgSrc;
                } catch (e) {
                    alert("您上传的图片格式不正确，请重新选择!");
                    return false;
                }
                imgObjPreview.style.display = 'none';
                document.selection.empty();
            }
            return true;
        }

        function showPreview(source) {
            var file = source.files[0];
            if (window.FileReader) {
                var fr = new FileReader();
                fr.onloadend = function (e) {
                    var pic = document.getElementById("portrait");
                    pic.style.display = 'block';
                    pic.style.width = '300px';
                    pic.style.height = '120px';
                    pic.src = e.target.result; //这个就是图片的流，可以直接展示到页面上
                };
                fr.readAsDataURL(file);
            }
        }
    </script>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>上传图片</title>
</head>
<body>
<form action="filesUpload" method="POST" name="xiangmu" id="xiangmu"
      enctype="multipart/form-data">
    <table>
        <tr>
            <td>图片上传1：</td>
            <td><input type=file name="myfiles" id="doc"
                       onchange="showImage();">
            </td>
            <div id="localImag">
                <img id="preview" width=-1 height=-1 style="diplay:none"/>
            </div>
        </tr>
        <tr>
            <td>图片上传2：</td>
            <!-- 为了实现张图片上传，上传框这个name要都一样 -->
            <td><input type="file" name="myfiles" id="doc1" onchange="showPreview(this)"></td>
            <div>
                <img id="portrait" width="-1" height="-1">
            </div>
        </tr>
        <tr>
            <td><input type="submit" value="提交"/>
            </td>
        </tr>
    </table>
</form>
</body>

</html>

success.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>
<h2>文件上传成功！</h2>
</body>
</html>

controller

package com.ylht.manager.controller;

import com.ylht.manager.service.PropertyService;
import org.apache.commons.lang3.RandomUtils;
import org.apache.commons.lang3.StringUtils;
import org.joda.time.DateTime;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

@Controller
public class FileUpload2Controller {

    @Autowired
    private PropertyService propertyService;

    @Autowired
    private PicUploadController picUploadController;


    @RequestMapping("/filesUpload")
    //requestParam要写才知道是前台的那个数组
    public String filesUpload(@RequestParam("myfiles") MultipartFile[] files,
                              HttpServletRequest request) {
        List<String> list = new ArrayList<String>();
        if (files != null && files.length > 0) {
            for (int i = 0; i < files.length; i++) {
                MultipartFile file = files[i];
                // 保存文件
                list = saveFile(request, file, list);
            }
        }
        //写着测试，删了就可以
        for (int i = 0; i < list.size(); i++) {
            System.out.println("集合里面的数据" + list.get(i));
        }
        return "success";//跳转的页面
    }

    private List<String> saveFile(HttpServletRequest request,
                                  MultipartFile file, List<String> list) {
        // 判断文件是否为空
        if (!file.isEmpty()) {
            try {
                // 保存的文件路径(如果用的是Tomcat服务器，文件会上传到\%TOMCAT_HOME%\webapps\YourWebProject\upload\文件夹中
                // )
                /*String filePath = request.getSession().getServletContext()
                        .getRealPath("/")
                        + "upload/" + file.getOriginalFilename();*/

                String filePath = getFilePath(file.getOriginalFilename());

                list.add(file.getOriginalFilename());
                File saveDir = new File(filePath);
                if (!saveDir.getParentFile().exists())
                    saveDir.getParentFile().mkdirs();

                // 转存文件
                file.transferTo(saveDir);
                return list;
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return list;
    }


    private String getFilePath(String sourceFileName) {
        String baseFolder = propertyService.REPOSITORY_PATH + File.separator + "images";
        Date nowDate = new Date();
        // yyyy/MM/dd
        String fileFolder = baseFolder + File.separator + new DateTime(nowDate).toString("yyyy") + File.separator + new DateTime(nowDate).toString("MM") + File.separator
                + new DateTime(nowDate).toString("dd");
        File file = new File(fileFolder);
        if (!file.isDirectory()) {
            // 如果目录不存在，则创建目录
            file.mkdirs();
        }
        // 生成新的文件名
        String fileName = new DateTime(nowDate).toString("yyyyMMddhhmmssSSSS") + RandomUtils.nextInt(100, 9999) + "." + StringUtils.substringAfterLast(sourceFileName, ".");
        return fileFolder + File.separator + fileName;
    }


}

主要用到的依赖jar包其实是

<!--文件上传-->
        <!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.3</version>
        </dependency>

<%@ 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>
<h2>文件上传成功！</h2>
</body>
</html>