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
我要评论<?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";
}
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定义两个一维数组，每个数组随便填充10个元素。输出的数组是两个数组的并集，并且从小到大排好序，不重复。
Error creating bean with name ‘eduChapterController‘: Unsatisfied dependency expressed through field
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