欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

详解spring mvc(注解)上传文件的简单例子

程序员文章站 2024-03-07 23:08:57
spring mvc(注解)上传文件的简单例子。 这有几个需要注意的地方 1.form的enctype=”multipart/form-data” 这个是上传文件必...

spring mvc(注解)上传文件的简单例子。

这有几个需要注意的地方

1.form的enctype=”multipart/form-data” 这个是上传文件必须的

2.applicationcontext.xml中 <bean id=”multipartresolver” class=”org.springframework.web.multipart.commons.commonsmultipartresolver”/> 关于文件上传的配置不能少

3、亲这两个jar包不能少哦,之前就是因为少了这个两个jar,一直报一些奇葩的错,给我累了个半死~(版本没什么要求)

commons-fileupload-1.2.2.jar

commons-io-2.0.1.jar 

大家可以看具体代码如下:

web.xml

<?xml version="0" encoding="utf-8"?> 
<web-app xmlns:xsi="http://wwwworg/2001/xmlschema-instance" xmlns="http://javasuncom/xml/ns/javaee" xmlns:web="http://javasuncom/xml/ns/javaee/web-app_2_xsd" xsi:schemalocation="http://javasuncom/xml/ns/javaee http://javasuncom/xml/ns/javaee/web-app_2_xsd" id="webapp_id" version="5"> 
 <display-name>webtest</display-name> 
 
 <listener> 
    <listener-class>orgspringframeworkwebcontextcontextloaderlistener</listener-class> 
  </listener> 
  <context-param> 
    <param-name>contextconfiglocation</param-name> 
    <param-value> 
      /web-inf/config/applicationcontextxml 
      /web-inf/config/codeifactionxml 
    </param-value> 
  </context-param> 
 
  <servlet> 
    <servlet-name>dispatcherservlet</servlet-name> 
    <servlet-class>orgspringframeworkwebservletdispatcherservlet</servlet-class> 
    <init-param> 
      <param-name>contextconfiglocation</param-name> 
      <param-value>/web-inf/config/codeifactionxml</param-value> 
    </init-param> 
    <load-on-startup>1</load-on-startup> 
  </servlet> 
  <!-- 拦截所有以do结尾的请求 --> 
  <servlet-mapping> 
    <servlet-name>dispatcherservlet</servlet-name> 
    <url-pattern>*do</url-pattern> 
  </servlet-mapping> 
 
 <welcome-file-list> 
  <welcome-file>indexdo</welcome-file> 
 </welcome-file-list> 
</web-app> 

applicationcontext.xml

<?xml version="0" encoding="utf-8"?> 
<beans xmlns="http://wwwspringframeworkorg/schema/beans" 
  xmlns:xsi="http://wwwworg/2001/xmlschema-instance" xmlns:p="http://wwwspringframeworkorg/schema/p" 
  xmlns:context="http://wwwspringframeworkorg/schema/context" 
  xsi:schemalocation="http://wwwspringframeworkorg/schema/beans http://wwwspringframeworkorg/schema/beans/spring-beans-xsd 
  http://wwwspringframeworkorg/schema/context http://wwwspringframeworkorg/schema/context/spring-context-xsd" 
  default-lazy-init="true"> 
 
  <!-- 启动spring mvc的注解功能,完成请求和注解pojo的映射 --> 
  <bean class="orgspringframeworkwebservletmvcannotationannotationmethodhandleradapter" lazy-init="false" /> 
 
  <!-- 另外最好还要加入defaultannotationhandlermapping,不然会被 xml或其它的映射覆盖! --> 
  <bean class="orgspringframeworkwebservletmvcannotationdefaultannotationhandlermapping" /> 
 
  <!-- 对模型视图名称的解析,即在模型视图名称添加前后缀 --> 
  <bean class="orgspringframeworkwebservletviewinternalresourceviewresolver" p:prefix="/web-inf/jsp/" p:suffix="jsp" /> 
 
  <!-- 支持上传文件 --> 
  <bean id="multipartresolver" class="orgspringframeworkwebmultipartcommonscommonsmultipartresolver"/> 
 
</beans> 

codeifaction.xml

<?xml version="0" encoding="utf-8"?> 
<beans xmlns="http://wwwspringframeworkorg/schema/beans" 
  xmlns:xsi="http://wwwworg/2001/xmlschema-instance" xmlns:context="http://wwwspringframeworkorg/schema/context" 
  xsi:schemalocation="http://wwwspringframeworkorg/schema/beans http://wwwspringframeworkorg/schema/beans/spring-beans-xsd 
  http://wwwspringframeworkorg/schema/context http://wwwspringframeworkorg/schema/context/spring-context-xsd" 
  default-lazy-init="true"> 
 
  <bean id="uploadaction" class="comcodeifactionuploadaction" /> 
 
</beans> 

uploadaction.java

package comcodeifaction; 
 
import javaiofile; 
import javautildate; 
 
import javaxservlethttphttpservletrequest; 
 
import orgspringframeworkstereotypecontroller; 
import orgspringframeworkuimodelmap; 
import orgspringframeworkwebbindannotationrequestmapping; 
import orgspringframeworkwebbindannotationrequestparam; 
import orgspringframeworkwebmultipartmultipartfile; 
 
@controller 
public class uploadaction { 
 
  @requestmapping(value = "/uploaddo") 
  public string upload(@requestparam(value = "file", required = false) multipartfile file, httpservletrequest request, modelmap model) { 
 
    systemoutprintln("开始"); 
    string path = requestgetsession()getservletcontext()getrealpath("upload"); 
    string filename = filegetoriginalfilename(); 
//    string filename = new date()gettime()+"jpg"; 
    systemoutprintln(path); 
    file targetfile = new file(path, filename); 
    if(!targetfileexists()){ 
      targetfilemkdirs(); 
    } 
 
    //保存 
    try { 
      filetransferto(targetfile); 
    } catch (exception e) { 
      eprintstacktrace(); 
    } 
    modeladdattribute("fileurl", requestgetcontextpath()+"/upload/"+filename); 
 
    return "result"; 
  } 
 
} 


index.jsp

<%@ page pageencoding="utf-8"%> 
<!doctype html> 
<html> 
<head> 
<meta charset="utf-8"> 
<title>上传图片</title> 
</head> 
<body> 
<form action="uploaddo" method="post" enctype="multipart/form-data"> 
<input type="file" name="file" /> <input type="submit" value="submit" /></form> 
</body> 
</html> 


web-inf/jsp/下的result.jsp

<%@ page pageencoding="utf-8"%> 
<!doctype html> 
<html> 
<head> 
<meta charset="utf-8"> 
<title>上传结果</title> 
</head> 
<body> 
<img alt="" src="${fileurl }" /> 
</body> 
</html> 

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。