SSM框架中的文件上传（八）
一、单文件的上传
1、页面代码
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <html> <head> <title>$Title$</title> </head> <body> <form action="${add}" method="post" enctype="multipart/form-data"> <input name="gid" type="hidden" value="${goods.gid }"> 商品名称：<input name="gname" value="${goods.gname }"><br> 商品价格：<input name="price" value="${goods.price }"><br> 类型：<select name="type.tid"> <c:forEach items="${types }" var="t"> <option <c:if test="${goods.tid==t.tid }">selected</c:if> value="${t.tid }">${t.tname }</option> </c:forEach> </select><br> 商品图片：<input type="file" name="pic" ><!-- multiple --> <c:if test="${goods!=null&&goods.img!=null }"> <img src="imgs/${goods.img }" width="80"> </c:if> <br> <input name="img" type="hidden" value="${goods.img }"> <br> <button type="submit">${goods==null?'增加':'修改' }</button> </form> </body> </html>
2、控制器代码
@RequestMapping("add")
public String add(Goods goods, @RequestParam("pic") MultipartFile file, HttpServletRequest request, HttpSession session){
String path = request.getSession().getServletContext().getRealPath("/imgs/");
String oldName = file.getOriginalFilename();
String ext = oldName.substring(oldName.lastIndexOf("."));
String newName = UUID.randomUUID().toString()+ext;
File f =new File(path,newName);
try {
file.transferTo(f);
goods.setImg(newName);
goodsService.add(goods);
} catch (IOException e) {
e.printStackTrace();
}
request.setAttribute("types",goodsService.findAllTypes());
return "add";
}
3、spring核心配置文件
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="maxUploadSize" value="5000000"/> <property name="defaultEncoding" value="utf-8"/> </bean> <mvc:resources location="/imgs/" mapping="/imgs/**"/> <mvc:annotation-driven/>
二、多文件的上传
1、只需修改控制器代码
对象改为数组
@RequestMapping("add")
public String add(Goods goods, @RequestParam("pic") MultipartFile[] files, HttpServletRequest request, HttpSession session){
for(MultipartFile file:files){
String path = request.getSession().getServletContext().getRealPath("/imgs/");
String oldName = file.getOriginalFilename();
String ext = oldName.substring(oldName.lastIndexOf("."));
String newName = UUID.randomUUID().toString()+ext;
File f =new File(path,newName);
try {
file.transferTo(f);
goods.setImg(newName);
goodsService.add(goods);
} catch (IOException e) {
e.printStackTrace();
}
}
request.setAttribute("types",goodsService.findAllTypes());
return "add";
}
