Springmvc实现文件上传

本文实例为大家分享了springmvc实现文件上传的具体代码，供大家参考，具体内容如下

1.环境搭建:

在maven的pom.xml文件中导入两个依赖

1).commons-fileupload
2).commons-io

在resources目录下的springmvc.xml文件中配置multipartresolver

<?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/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
    http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd">
  <!--包扫描-->
  <context:component-scan base-package="cn.itcast"></context:component-scan>
  <!--配置multipartresolver,注意:id名称固定为multipartresolver-->
  <bean id="multipartresolver" class="org.springframework.web.multipart.commons.commonsmultipartresolver">

  </bean>

  <mvc:annotation-driven ></mvc:annotation-driven>
  
  <!--让静态资源不经过过滤器-->
  <mvc:resources mapping="/js/**" location="/js/"></mvc:resources>

  <!--视图解析器给controller中返回的逻辑视图名加上前缀和后缀-->
  <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>
</beans>

2.编写前台测试jsp

<form action="/test/file" method="post" enctype="multipart/form-data">
    上传的文件:<input type="file" name="upload"><br/>
    密钥:<input type="text" name="password"><br/>
    <input type="submit" value="提交">
 </form>

注意页面三要素:

      1).表单提交方式必须为post

      2).表单中必须有file域,即type="file"

      3).表单中enctype="multipart/form-data"

3.编写后台测试代码

@controller
@requestmapping("/test")
public class fileuploadcontroller {
  @requestmapping("/file")
  public string testfileupload(httpservletrequest request, multipartfile upload) throws ioexception { 
     //upload是表单中文件name属性值,必须保持一致
    system.out.println("testfileupload...");
    string realpath = request.getsession().getservletcontext().getrealpath("/uploads");
    file file = new file(realpath);
    if(!file.exists()){
      file.mkdirs();//创建文件夹
    }
    string filename = upload.getoriginalfilename(); //获取文件名
    string name = upload.getname();//获取表单中的name属性值 即upload

    string uuid = uuid.randomuuid().tostring().replaceall("-", "");//生成uuid避免文件名重复导致冲突覆盖
    filename=uuid+"_"+filename;
    upload.transferto(new file(file,filename));
    return "forward:success.jsp";
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。