SpringMVC 系列教程1-文件上传-配置

SpringMVC默认没有配置上传解析器

• 使用SpringMVC来处理上传必须添加对MultipartResolver上传解析器的声明配置。

• 配置之后，客户端每次进行请求的时候，SpringMVC都会检查request里面是否包含有上传文件信息的，如果包含了就会使用MultipartResolver进行解析

• SpringMVC会使用一个支持文件处理的MultipartHttpServletRequest来包裹当前的HttpServletRequest，而MultipartHttpServletRequest是可以对文件进行处理的

• SpringMVC内置了一个MultipartResolver的实现类org.springframework.web.multipart.commons.CommsMultipartResolver

pom.xml

<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.jege.spring.mvc</groupId>
    <artifactId>spring-mvc-upload-multipart-file</artifactId>
    <version>1.0.RELEASE</version>
    <packaging>war</packaging>

    <name>spring-mvc-upload-multipart-file</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <springframework.version>3.2.15.RELEASE</springframework.version>
        <junit.version>4.12</junit.version>
        <java.version>1.7</java.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${springframework.version}</version>
        </dependency>

        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.2.2</version>
        </dependency>

        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.2</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>

    </dependencies>

    <build>
        <finalName>spring-mvc-upload-multipart-file</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.eclipse.jetty</groupId>
                <artifactId>jetty-maven-plugin</artifactId>
                <version>9.3.14.v20161028</version>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.6</version>
                <configuration>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    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">

    <!-- 组件扫描 -->
    <context:component-scan base-package="com.jege.spring.mvc" />

    <!-- 引入spirng-mvc配置文件 -->
    <import resource="classpath:config/applicationContext-mvc.xml" />

</beans>

applicationContext-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    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">

    <!-- 配置视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/" />
        <property name="suffix" value=".jsp" />
    </bean>

    <!-- 配置上传解析器 -->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!-- 配置上传文件最大尺寸为1000MB -->
        <property name="maxUploadSize" value="1048576000" />
        <!-- 设置在文件上传时允许写到内存中的最大值，以字节为单位计算，默认是10240 -->
        <property name="maxInMemorySize" value="4096" />
        <!-- 表示用来解析request请求的默认编码格式，当没有指定的时候根据Servlet规范会使用默认值ISO-8859-1。 -->
        <!-- 当request自己指明了它的编码格式的时候就会忽略这里指定的defaultEncoding -->
        <property name="defaultEncoding" value="UTF-8" />
    </bean>

    <!-- 可以访问静态资源 -->
    <mvc:default-servlet-handler />

    <!-- 解析@RequestMapping -->
    <mvc:annotation-driven />

</beans>

源码地址

https://github.com/je-ge/spring

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