spring mvc利用MultipartResolver解析Multipart/form-data进行文件上传

 <properties>
      <spring.version>3.2.1.RELEASE</spring.version>
  </properties>
  <dependencies>
          <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</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-context</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-beans</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aop</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-tx</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-test</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context-support</artifactId>
                <version>${spring.version}</version>
            </dependency>

          <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.16</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.8.2</version>
        </dependency>
        <dependency>
                <groupId>org.apache.velocity</groupId>
                <artifactId>velocity</artifactId>
                <version>1.7</version>
            </dependency>
            <dependency>
                <groupId>org.apache.velocity</groupId>
                <artifactId>velocity-tools</artifactId>
                <version>2.0</version>
                <exclusions>
                    <exclusion>
                        <groupId>org.apache.struts</groupId>
                        <artifactId>struts-core</artifactId>
                    </exclusion>
                    <exclusion>
                        <groupId>org.apache.struts</groupId>
                        <artifactId>struts-taglib</artifactId>
                    </exclusion>
                    <exclusion>
                        <groupId>org.apache.struts</groupId>
                        <artifactId>struts-tiles</artifactId>
                    </exclusion>
                    <exclusion>
                        <groupId>sslext</groupId>
                        <artifactId>sslext</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>

            <dependency>
                <groupId>servletapi</groupId>
                <artifactId>servlet-api</artifactId>
                <version>2.4</version>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>jstl</artifactId>
                <version>1.2</version>
            </dependency>
            <dependency>
                <groupId>jspapi</groupId>
                <artifactId>jsp-api</artifactId>
                <version>2.0</version>
                <optional>true</optional>
            </dependency>
            
            <!-- if you enable JSR303 (Bean Validation) in spring. -->
            <dependency>
                <groupId>org.hibernate</groupId>
                <artifactId>hibernate-validator</artifactId>
                <version>4.2.0.Final</version>
                <!-- <optional>true</optional> -->
            </dependency>
            <dependency>
                <groupId>commons-fileupload</groupId>
                <artifactId>commons-fileupload</artifactId>
                <version>1.3.1</version>
            </dependency>
            <dependency>
                <groupId>commons-io</groupId>
                <artifactId>commons-io</artifactId>
                <version>2.2</version>
            </dependency>
  </dependencies>

<form method="post" enctype="multipart/form-data">
    <div>
        <label for="userName">userName:</label>
        <input name="userName" value="$!user.userName">
        <span>$!br.getFieldError("userName").getDefaultMessage()</span>
    </div>
    
    <div>
        <label for="email">Email:</label>
        <input name="email" value="$!user.email">
    </div>
    
    <div>
        <label for="age">age:</label>
        <input name="age" value="$!user.age">
    </div>
    
    <div>
        <label for="image">image:</label>
        <input type="file" name="image">
    </div>
    <button type="submit">Submit</button>
</form>