在该示例中,阐述了springmvc如何上传文件。
1、上传页面upload.jsp
<body> <form action="/testspringmvc3/data/uploadfile" enctype="multipart/form-data" method="post"> file:<input type="file" name="file"><br> <input type="submit" value="upload file"> </form> </body>
2、controller配置文件
<?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:mvc="http://www.springframework.org/schema/mvc" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemalocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <!-- 使spring支持自动检测组件,如注解的controller --> <context:component-scan base-package="cn.com.yy.controller"/> <!-- 开启注解配置 --> <mvc:annotation-driven/> <!-- 支持jsp jstl的解析器 --> <bean id="viewresolver" class="org.springframework.web.servlet.view.internalresourceviewresolver"> <property name="prefix" value="/web-inf/page/"/> <property name="suffix" value=".jsp"/> </bean> <!-- 配置文件上传解析器 --> <bean id="multipartresolver" class="org.springframework.web.multipart.commons.commonsmultipartresolver"> <property name="defaultencoding" value="utf-8"/> <property name="maxuploadsize" value="10485760000"/> <property name="maxinmemorysize" value="40960"/> </bean> </beans>
主要是添加了文件上传的解析器,配置了默认编码,最大的上传大小以及缓存大小等参数。
3、controller
package cn.com.yy.controller; import java.io.file; import java.io.filenotfoundexception; import java.io.fileoutputstream; import java.io.ioexception; import java.io.inputstream; import java.io.outputstream; import org.springframework.stereotype.controller; import org.springframework.web.bind.annotation.requestmapping; import org.springframework.web.bind.annotation.requestparam; import org.springframework.web.multipart.commons.commonsmultipartfile; @controller @requestmapping("/data") public class fileuploadcontroller { /** * method1:通过参数commonsmultipartfile进行解析 * @requestparam("file")中的file对应于upload.jsp中的file类型的name对应的名称 * @param file * @return * @throws ioexception */ @requestmapping(value="/uploadfile") public string upload1(@requestparam("file") commonsmultipartfile file) throws ioexception{ //获取文件名称 string filename = file.getoriginalfilename(); //写入本地磁盘 inputstream is = file.getinputstream(); byte[] bs = new byte[1024]; int len; outputstream os = new fileoutputstream(new file("d:/temp/" + filename)); while ((len = is.read(bs)) != -1) { os.write(bs, 0, len); } os.close(); is.close(); return "upload_success"; } @requestmapping("/upload") public string topage(){ return "upload"; } }
4、返回页面upload_success.jsp
<body> upload file success!! </body>
5、测试
访问 http://www.lhsxpumps.com/_localhost:8080/testspringmvc3/data/upload 跳转到上传页面
选择文件上传
点击上传会跳转到上传成功页面。
上述方法只是简单的讲解了springmvc如何上传文件。
第二种方法:使用springmvc封装的方法进行文件上传
/** * 使用springmvc封装好的方法进行文件上传 * @param request * @param response * @throws illegalstateexception * @throws ioexception */ @requestmapping("/uploadfile2") public void upload2(httpservletrequest request,httpservletresponse response) throws illegalstateexception, ioexception{ //获取解析器 commonsmultipartresolver resolver = new commonsmultipartresolver(request.getsession().getservletcontext()); //判断是否是文件 if(resolver.ismultipart(request)){ //进行转换 multiparthttpservletrequest multirequest = (multiparthttpservletrequest)(request); //获取所有文件名称 iterator<string> it = multirequest.getfilenames(); while(it.hasnext()){ //根据文件名称取文件 multipartfile file = multirequest.getfile(it.next()); string filename = file.getoriginalfilename(); string localpath = "d:/temp/" + filename; file newfile = new file(localpath); //上传的文件写入到指定的文件中 file.transferto(newfile); } } }
该方法上传文件效率更优。
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移动技术网。
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