springmvc文件上传

1、maven依赖

<?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>

  <groupId>com.ly.mvc</groupId>
  <artifactId>springmvc03</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>springmvc03 Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>13</maven.compiler.source>
    <maven.compiler.target>13</maven.compiler.target>
    <!--锁定spring版本-->
    <spring.version>5.0.2.RELEASE</spring.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.0.1</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.0</version>
      <scope>provided</scope>
    </dependency>
    <!--文件上传,依赖commons-io-->
    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.3.1</version>
    </dependency>
  </dependencies>

  <build>
    <finalName>springmvc03</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
          <!--解决IDEA maven变更后自动重置LanguageLevel和JavaCompiler版本的问题-->
          <configuration>
            <source>${maven.compiler.source}</source>
            <target>${maven.compiler.target}</target>
          </configuration>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

 

2、上传页面

<%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2020/2/28
  Time: 16:00
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<%--文件上传时method必须是post、enctype必须是multipart/form-data--%>
<form action="upload" method="post" enctype="multipart/form-data">
    <input type="file" name="upload"/><br>
    <input type="submit" value="提交"/>
</form>
</body>
</html>

3、springmvc.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:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">
    <!--配置注解扫描的包-->
    <context:component-scan base-package="com.ly.mvc"/>
    <!--配置视图解析器-->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
    <!--配置文件上传解析器,id必须时multipartResolver-->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!--最大上传大小,单位字节,10MB是10*1024*1024=-->
        <property name="maxUploadSize" value="10485760"></property>
    </bean>
    <!--开启springmvc注解驱动-->
    <mvc:annotation-driven/>
</beans>

 

4、处理方法

    /**
     *<input type="file" name="upload"/><br>
     *springmvc文件上传,表单上传文件的name属性必须与处理方法的MultipartFile类型的参数名一致
     */
    @RequestMapping("/upload")
    public String upload(HttpServletRequest request,MultipartFile upload) throws IOException {
        //美女.jpg
        String filename = upload.getOriginalFilename();
        //UUID将-替换成""再拼接上文件后缀
        filename = UUID.randomUUID().toString().replace("-","") + "."+filename.split("\\.")[1];
        //文件上传路径
        String path = request.getSession().getServletContext().getRealPath("/uploads/");
        //该路径是否存在,若不存在则创建
        File file = new File(path);
        if(!file.exists()) {
            file.mkdirs();
        }
        //上传文件
        upload.transferTo(new File(path,filename));
        return "success";
    }

5、总结

5.1、上传页面表单method必须为post、enctype必须是multipart/form-data

5.2、springmvc.xml中配置的文件解析器id必须为multipartResolver

5.3、上传页面中表单上传文件的name属性必须与处理方法中的MultipartFile类型的参数名相同

posted @ 2020-02-28 17:23  牛牛的自留地  阅读(173)  评论(0编辑  收藏  举报