文件上傳
導入jar包css
jsp頁面html
<body> <a href="down">下載地址1</a> <a href="down1">下載地址2</a> <form action="upload" method="post" enctype="multipart/form-data"> <table> <tr> <th>用戶</th> <td> <input type="text" name="name" value="" /> </td> </tr> <tr> <th>地址</th> <td> <input type="text" name="address" value="" /> </td> </tr> <tr> <td> <input type="file" name="file" value="" /> </td> </tr> <tr> <td><input type="submit" value="註冊"></td> </tr> </table> </form> </body>
xml配置文件web
<!-- 開啓掃描 --> <context:component-scan base-package="com.liy.controller"></context:component-scan> <!-- 開啓mvc註解 --> <mvc:annotation-driven></mvc:annotation-driven> <bean class="org.springframework.web.multipart.commons.CommonsMultipartResolver" id="multipartResolver" > <!-- 設置上傳文件信息參數 --> <!-- 設置文件上傳的最大尺寸 --> <property name="maxUploadSize"> <value>5242880</value> </property> </bean> <!-- 配置文件的容許訪問靜態資源 --> <mvc:resources location="/img/" mapping="/img/**"></mvc:resources>
controller層代碼spring
@Controller
public class UploadController {
@RequestMapping("/upload")
@ResponseBody
public void upload(String name,String address,MultipartFile file) throws IllegalStateException, IOException{
System.out.println(name+"--"+address+"--"+file.getOriginalFilename());
file.transferTo(new File("d:/img/imgs/"+file.getOriginalFilename()));
}
下載的controller代碼(兩種方式)
@RequestMapping("down")
@ResponseBody
public void down(HttpServletRequest request , HttpServletResponse response) throws IOException{
File file = new File("d:/img/2.png");
System.out.println(file.getName());
//設置響應頭和客戶端保存文件名
response.setCharacterEncoding("utf-8");
response.setContentType("multipart/form-data");
response.setHeader("Content-Disposition", "fileName=" + file.getName());
//打開本地文件流
InputStream in = new FileInputStream(file);
OutputStream out = response.getOutputStream();
byte [] b = new byte[1024];
int len;
while ((len = in.read(b)) > 0 ) {
out.write(b , 0 ,len);
}
out.close();
in.close();
}
@RequestMapping("/down1")
public ResponseEntity<byte[]> download(HttpServletRequest request) throws IOException {
// 須要下載的文件
File file = new File("d:/img/2.png");
byte[] body = null;
InputStream is = new FileInputStream(file);
body = new byte[is.available()];
is.read(body);
HttpHeaders headers = new HttpHeaders();
headers.add("Content-Disposition", "attchement;filename=" + file.getName());
HttpStatus statusCode = HttpStatus.OK;
ResponseEntity<byte[]> entity = new ResponseEntity<byte[]>(body, headers, statusCode);
return entity;
}
在SpringMVC中，默認狀況下，全部的靜態資源都會被攔截（js，css。html，圖片、視頻、音頻），對於靜態資源，須要手動配置靜態資源過濾。
解決這個問題的方式有兩種:mvc
在web.xml中配置default servlet
<servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.js</url-pattern> </servlet-mapping> <!-- <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.jpg</url-pattern> </servlet-mapping> --> <servlet-mapping> <servlet-name>default</servlet-name> <url-pattern>*.png</url-pattern> </servlet-mapping>
在配置文件中經過標籤設置
<!-- 配置文件的容許訪問靜態資源 -->
<mvc:resources location="/img/" mapping="/img/**"></mvc:resources>
<mvc:resources location="/js/" mapping="/js/**"></mvc:resources>