SpringMVC的初体验-5

Posted 2022-09-30

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一. SpringMVC文件上传

配置spring-mvc.xml

<?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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- 包扫描 -->
    <context:component-scan base-package="com.bee"/>

    <!-- 视图解析器 -->
    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp"></property>
    </bean>
    
    <!-- 文件上传配置 -->
    <bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">    
        <property name="defaultEncoding" value="UTF-8"/>  
        <property name="maxUploadSize" value="10000000"/> 单位byte——10M
    </bean>

</beans>

控制层

@Controller
public class FileUploadController 
    //单文件上传
    @RequestMapping("/upload")
    // <input type="file" name="file1"/>
    public String uploadFile(@RequestParam("file1") MultipartFile file1,HttpServletRequest request)throws Exception
        String filePath=request.getServletContext().getRealPath("/"); // “/”映射到了/WebContent/
        System.out.println(filePath);
        file1.transferTo(new File(filePath+"upload/"+file1.getOriginalFilename()));
        return "redirect:success.html";
    
    
    //多文件上传
    @RequestMapping("/upload2")
    public String uploadFiles(@RequestParam("file") MultipartFile[] files,HttpServletRequest request)throws Exception
        String filePath=request.getServletContext().getRealPath("/"); // “/”映射到了/WebContent/
        System.out.println(filePath);
        for(MultipartFile file:files)
            file.transferTo(new File(filePath+"upload/"+file.getOriginalFilename()));            
        
        return "redirect:success.html";

注意：WebContent/目录下的静态资源客户端浏览器是可以访问到的

http://localhost:8080/SpringMVCDemo/upload/a.jpg
                                   ^
                                   |---> /WebContent/
                                   |---> $pageContext.request.contextPath

前端表单

单文件上传

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="upload.do" method="post" enctype="multipart/form-data">
  <table>
    <tr>
      <th colspan="2">上传文件</th>
    </tr>
    <tr>
      <td>文件</td>
      <td>
        <input type="file" name="file1"/>
      </td>
    </tr>
    <tr>
      <td colspan="2">
        <input type="submit" value="上传文件"/>
      </td>
    </tr>
  </table>
</form>
</body>
</html>

多文件上传

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="upload2.do" method="post" enctype="multipart/form-data">
  <table>
    <tr>
      <th colspan="2">上传文件</th>
    </tr>
    <tr>
      <td>文件一</td>
      <td>
        <input type="file" name="file"/>
      </td>
    </tr>
    <tr>
      <td>文件二</td>
      <td>
        <input type="file" name="file"/>
      </td>
    </tr>
    <tr>
      <td colspan="2">
        <input type="submit" value="上传文件"/>
      </td>
    </tr>
  </table>
</form>
</body>
</html>

二. 文件上传涉及到的jar包

com.springsource.org.apache.commons.fileupload-1.2.0.jar
com.springsource.org.apache.commons.io-1.4.0.jar

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