spring mvc —— 上传文件用 Commons FileUpload 上传文件（4-1）

桃扇骨 2022-06-02 05:58 164阅读 0赞

controller

import java.io.File;
    import java.io.IOException;
    import java.io.UnsupportedEncodingException;
    import java.util.ArrayList;
    import java.util.List;
    import javax.servlet.http.HttpServletRequest;
    import org.apache.commons.logging.Log;
    import org.apache.commons.logging.LogFactory;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.validation.BindingResult;
    import org.springframework.web.bind.annotation.ModelAttribute;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.multipart.MultipartFile;
    
    import domain.Product;
    
    @Controller
    public class ProductController {
    
        private static final Log logger = LogFactory
                .getLog(ProductController.class);
    
        @RequestMapping(value = "/input-product")
        public String inputProduct(Model model) {
            model.addAttribute("product", new Product());
            return "ProductForm";
        }
    
        @RequestMapping(value = "/save-product")
        public String saveProduct(HttpServletRequest servletRequest,
                @ModelAttribute Product product, BindingResult bindingResult,
                Model model) {
    
            List<MultipartFile> files = product.getImages();
    
            List<String> fileNames = new ArrayList<String>();
    
            if (null != files && files.size() > 0) {
                for (MultipartFile multipartFile : files) {
    
                    String fileName;
    				try {
    					fileName = multipartFile.getOriginalFilename();
    			        fileNames.add(fileName);
    	                String path = servletRequest.getServletContext()
    	                .getRealPath("/image");
    	                System.out.println("path "+path);
    	                File imageFile = new File(path, fileName);
    	                multipartFile.transferTo(imageFile);
    				} catch (UnsupportedEncodingException e1) {
    					e1.printStackTrace();
    				}catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
    
            // save product here
            model.addAttribute("product", product);
            return "ProductDetails";
        }
    
    }

import java.io.Serializable;
    import java.math.BigDecimal;
    import java.util.List;
    
    import javax.validation.constraints.NotNull;
    import javax.validation.constraints.Size;
    
    import org.springframework.web.multipart.MultipartFile;
    
    public class Product implements Serializable {
        private static final long serialVersionUID = 1;
    
        @NotNull
        @Size(min=1, max=10)
        private String name;
    
    	private String description;
        private BigDecimal price;
       private List<MultipartFile> images;
    
        public String getName() {
    		return name;
    	}
    	public void setName(String name) {
    		this.name = name;
    	}
        public String getDescription() {
            return description;
        }
        public void setDescription(String description) {
            this.description = description;
        }
        public BigDecimal getPrice() {
            return price;
        }
        public void setPrice(BigDecimal price) {
            this.price = price;
        }
        public List<MultipartFile> getImages() {
            return images;
        }
        public void setImages(List<MultipartFile> images) {
            this.images = images;
        }
    }

springmvc-config.xml

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
     xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
     xsi:schemaLocation="
            http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/mvc
            http://www.springframework.org/schema/mvc/spring-mvc.xsd     
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context.xsd">
    
    
     <context:component-scan base-package="controller" />
     <mvc:annotation-driven />
    
    
     <mvc:resources mapping="/css/**" location="/css/" />
     <mvc:resources mapping="/*.html" location="/" />
        <mvc:resources mapping="/image/**" location="/image/" />
    
    
     <bean id="viewResolver"
     class="org.springframework.web.servlet.view.InternalResourceViewResolver">
     <property name="prefix" value="/WEB-INF/jsp/" />
     <property name="suffix" value=".jsp" />
     </bean>
          <bean id="multipartResolver"             class="org.springframework.web.multipart.commons.CommonsMultipartResolver">         <property name="maxUploadSize" value="5000000000"/>     </bean>
    
    
    </beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
    <web-app version="3.1" 
    		xmlns="http://xmlns.jcp.org/xml/ns/javaee" 
        	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
        	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee 
    			http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"> 
      	
       <filter>  
            <filter-name>characterEncodingFilter</filter-name>  
            <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>  
            <init-param>  
                <param-name>encoding</param-name>  
                <param-value>UTF-8</param-value>  
            </init-param>  
            <init-param>  
                <param-name>forceEncoding</param-name>  
                <param-value>true</param-value>  
            </init-param>  
        </filter>  
        <filter-mapping>  
            <filter-name>characterEncodingFilter</filter-name>  
            <url-pattern>/*</url-pattern>  
        </filter-mapping> 
        <servlet>
            <servlet-name>springmvc</servlet-name>
            <servlet-class>
                org.springframework.web.servlet.DispatcherServlet
            </servlet-class>
    	    <init-param>
    			<param-name>contextConfigLocation</param-name>
    			<param-value>/WEB-INF/config/springmvc-config.xml</param-value>
    		</init-param>
            <load-on-startup>1</load-on-startup>    
    	</servlet>
    
        <servlet-mapping>
            <servlet-name>springmvc</servlet-name>
            <url-pattern>/</url-pattern>
        </servlet-mapping>
    </web-app>

pom

<dependencies>
    		<dependency>
    			<groupId>javax.servlet</groupId>
    			<artifactId>javax.servlet-api</artifactId>
    			<version>3.1.0</version>
    			<scope>provided</scope>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-webmvc</artifactId>
    			<version>4.2.4.RELEASE</version>
    		</dependency>
    		<dependency>
    			<groupId>javax.servlet</groupId>
    			<artifactId>jstl</artifactId>
    			<version>1.2</version>
    			<scope>runtime</scope>
    		</dependency>
     <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency>
    		<dependency>
    			<groupId>org.hibernate</groupId>
    			<artifactId>hibernate-validator</artifactId>
    			<version>5.2.4.Final</version>
    		</dependency>
    		<dependency>
    			<groupId>org.hibernate</groupId>
    			<artifactId>hibernate-validator-annotation-processor</artifactId>
    			<version>5.2.4.Final</version>
    		</dependency>
    
    
    	</dependencies>

页面

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
    <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
    <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>  
    <!DOCTYPE html>
    <html>
    <head>
    <title>Add Product Form</title>
    <style type="text/css">@import url("<c:url value="/css/main.css"/>");</style>
    </head>
    <body>
    
    <div id="global">
    <form:form commandName="product" action="save-product" method="post" enctype="multipart/form-data">
        <fieldset>
            <legend>Add a product</legend>
            <p>
                <label for="name">Product Name: </label>
                <form:input id="name" path="name" cssErrorClass="error"/>
                <form:errors path="name" cssClass="error"/>
            </p>
            <p>
                <label for="description">Description: </label>
                <form:input id="description" path="description"/>
            </p>
            <p>
                <label for="price">Price: </label>
                <form:input id="price" path="price" cssErrorClass="error"/>
            </p>
            <p>
                <label for="image">Product Image: </label>
                <input type="file" name="images" multiple="multiple"/>
            </p>
            <p id="buttons">
                <input id="reset" type="reset" tabindex="4">
                <input id="submit" type="submit" tabindex="5" 
                    value="Add Product">
            </p>
        </fieldset>
    </form:form>
    </div>
    </body>
    </html>

enctype="multipart/form-data"  设置支持上传文件

源码demo： [https://github.com/kaifengxu/spring-mvc-xuexizhinan/tree/master/chapter-11/sts/upload1][https_github.com_kaifengxu_spring-mvc-xuexizhinan_tree_master_chapter-11_sts_upload1]

[https_github.com_kaifengxu_spring-mvc-xuexizhinan_tree_master_chapter-11_sts_upload1]: https://github.com/kaifengxu/spring-mvc-xuexizhinan/tree/master/chapter-11/sts/upload1