JavaEE 之 文件上传

1.文件上传

　　a.配置mySpring-servlet.xml

<bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!-- 限制上传文件的大小  -1 为不限制 -->
        <property name="maxUploadSize" value="-1">
        </property>
</bean>

　　b.使用

@Controller
public class uploadFile {
    @RequestMapping("/upload")
    public void upload(@RequestParam("myFile") CommonsMultipartFile file,HttpServletRequest req){
        String fileName=file.getOriginalFilename();
        String path=req.getSession().getServletContext().getRealPath("upload");
        try {
            file.getFileItem().write(new File(path + File.separator + fileName));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

　　c.解决中文乱码

　　　　①在表单中accept-charset="utf-8"

　　　　②web.xml文件中

    <filter>
        <filter-name>Set Character Encoding</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>
    </filter>
    <filter-mapping>
        <filter-name>Set Character Encoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>