ssm框架下上传图片及其他信息

先引入这两个包：

                <dependency>

	        <groupId>commons-fileupload</groupId>

			<artifactId>commons-fileupload</artifactId>

			<version>1.3.1</version>

		</dependency>

		<dependency>

			<groupId>commons-io</groupId>

			<artifactId>commons-io</artifactId>

			<version>1.3.1</version>

		</dependency>

html:

注意：enctype="multipart/form-data"  这个要这样定义

<form id="form-register" action="${pageContext.request.contextPath}/user/upLoadPicture.do" method="post"  enctype="multipart/form-data" onsubmit="return check()" class="form-horizontal m-t">

<div class="form-group">

        <label class="col-sm-5 control-label">上传头像：</label>

        <input type="file" name="file" id="file" style="height:30px;background-color:#ff9900;outline:none;border:none;width:10%;" onchange="uploadPic()">

</div>

<div class="form-group">

  <label class="col-sm-5 control-label">头像显示：</label>

   <div class="col-sm-4" >

      <img border="0" width="40" height="50" src="${user.picture}">

   </div>

</div>

  <input type="hidden" name="id" id="id" readonly="readonly" value="${user.id}" />

  <div class="form-group">

        <label class="col-sm-5 control-label"><span style="color: red;">*</span>用户名：</label>

        <div class="col-sm-4" >

            <input type="text" id="name" name="name"  class="form-control" placeholder="请输入用户名" onblur="checkName()"  maxlength="16"  value="${user.name}">

            <div id="user_prompt">用户名由4到16位（字母，数字，下划线，减号）</div>

        </div>

   </div>

  <div class="form-group">

        <label class="col-sm-5 control-label">真实姓名：</label>

        <div class="col-sm-4">

            <input type="text" id="realName" name="realName" class="form-control" placeholder="请输入真实姓名"  value="${user.realName}">

        </div>

    </div>

        	<div class="form-group">

            	<label class="col-sm-5 control-label">性别</label>

                <div class="col-sm-4">

                <c:if test="${user.gender=='男'}">

                   <div class="radio-box"  style="float:left">

					<input name="gender" type="radio" id="male" value="男" checked>

					<label for="sex-1">男</label>

				</div>

				<div class="radio-box"  style="float:left">

					<input name="gender" type="radio" id="female" value="女">

					<label for="sex-2">女</label>

				</div>

                </c:if>

                <c:if test="${user.gender=='女'}">

                   <div class="radio-box"  style="float:left">

					<input name="gender" type="radio" id="male" value="男">

					<label for="sex-1">男</label>

				</div>

				<div class="radio-box"  style="float:left">

					<input name="gender" type="radio" id="female" value="女" checked>

					<label for="sex-2">女</label>

				</div>

                </c:if>

                </div>

            </div>

            <div class="form-group">

            	<label class="col-sm-5 control-label">民族</label>

                <div class="col-sm-4">

                  <select name="ethGro" class="form-control input-sm">

                         <option selected="selected" value="${user.ethGro}">${user.ethGro}</option>

                  </select>

                </div>

            </div>

<br>

    <div class="form-group" align=center>

      <div class="col-sm-8 col-sm-offset-2">

        <button class="btn btn-primary" type="submit">保存</button>

        </div>

    </div>

</form

后台：

@RequestMapping(value="upLoadPicture.do",method = RequestMethod.POST)

public String  upload(User user,HttpServletRequest request,ModelMap map) throws Exception{

	  System.out.println(request.getParameter("name"));

      //保存数据库的路径

      String sqlPath = null;

      //定义文件保存的本地路径

      String localPath="D:\\File\\";

      //创建文件

  	  File dir=new File(localPath);

      if(!dir.exists()){

  		dir.mkdirs();

  	  }

      //定义 文件名

      String filename=request.getParameter("name").toString();

      if(!user.getFile().isEmpty()){

          //生成uuid作为文件名称

          String uuid = UUID.randomUUID().toString().replaceAll("-","");

          //获得文件类型（可以判断如果不是图片，禁止上传）

          String contentType=user.getFile().getContentType();

          //获得文件后缀名

          String suffixName=contentType.substring(contentType.indexOf("/")+1);

          //得到 文件名

          filename=uuid+"."+suffixName;

          System.out.println(filename);

          //文件保存路径

          user.getFile().transferTo(new File(localPath+filename));

          sqlPath = "/images/"+filename;

          System.out.println(sqlPath);

          user.setPicture(sqlPath);

          userService.updateUser(user);

      }

      //把图片的相对路径保存至数据库

      userService.updateUserNoPicture(user);

      Page page=new Page();

      page.setCurrentPage(1);

      List<User> users = userService.getAllUser(page);

      page.setRows( userService.count());

  	  map.addAttribute("page",page);

  	  map.addAttribute("users",users);

  	  return "user_list";

}