JAVA EE之jspSmartUpload上传头像

妖狐艹你老母 2022-05-12 14:26 179阅读 0赞

> jspSmartUpload.jar文件    链接:[https://pan.baidu.com/s/1ta11516vz8XaDnN1jnQz6w][https_pan.baidu.com_s_1ta11516vz8XaDnN1jnQz6w]  密码:utbn

### 1:目录结构 ###

![70][]

### 1：index.jsp ###

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
      <head>
        <title>$Title$</title>
      </head>
      <body>
      <form action="upload.do" method="post" enctype="multipart/form-data">
        选择头像<input type="file" name="myFile">
        <input type="submit" value="上传">
      </form>
      
      </body>
    </html>

### 3：UploadServlet.java ###

package com.yu;
    
    
    import com.jspsmart.upload.*;
    import org.apache.log4j.Logger;
    
    
    import javax.servlet.ServletConfig;
    
    import javax.servlet.ServletException;
    import javax.servlet.annotation.WebServlet;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import java.io.IOException;
    import java.util.Date;
    
    @WebServlet("/upload.do")
    public class UploadServlet extends HttpServlet {
        ServletConfig servletConfig;
    
    //  private static Logger logger = Logger.getLogger(UploadServlet.class);
    
        @Override
        public void init(ServletConfig config) throws ServletException {
            this.servletConfig=config;
        }
    
        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            doPost(request,response);
        }
        protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        	 SmartUpload su=new SmartUpload();//1：创建一个SmartUpload对象
             su.initialize(servletConfig,request,response);//2：初始化SmartUpload对象
    
             su.setAllowedFilesList("png,jpg,jpeg");//3:设置文件上传的限制
             su.setMaxFileSize(3*1024*1024);    //4：设置单个文件最大字节数
    
             try{
                 su.upload();//5:使用upload上传
             }catch (SmartUploadException e){
                 e.printStackTrace();
             }
    
             //6:获取时间，作为文件名
             Date curDate=new Date();
             long d=curDate.getTime();
    
    
    
             //7:获取全部上传文件
             Files files=su.getFiles();
             //8:获取指定位置的文件文件
             File file=files.getFile(0);
    
             //9;获取文件的后缀名
             String extFile=file.getFileExt();
             //10:获取时间，作为文件名
             String mainFile=String.valueOf(d);
             
             
    //      绝对路径
    //      String uploadPath =servletConfig.getServletContext().getRealPath("/");
    //      服务器的根目录下 /Users/mingkunyu/tool/apache-tomcat-8.5.32/wtpwebapps/Yuu/
             
    //      使用相对路径
            String saveUrl="upload/";//此目录需要新建
            String filePath=saveUrl+mainFile+"."+extFile;
    //      服务器的upload目录下  /Users/mingkunyu/tool/apache-tomcat-8.5.32/wtpwebapps/Yuu/upload/1540285990824.jpg 
    
            
    //      eclipse重新部署之后，项目状态就会被清空(你的上传图片文件夹就会被删除)，但是如果不是重新部署，只是重启服务器的话，你的图片目录还会在。
            String uploadPath =servletConfig.getServletContext().getRealPath("/")+saveUrl;
    //      /Users/mingkunyu/tool/apache-tomcat-8.5.32/wtpwebapps/Yuu/upload/
            java.io.File f=new java.io.File(uploadPath);
            if (!f.exists()) {//没有此目录就新建一个目录
    	  f.mkdirs();
    	 }
    
    
    
            try{
                file.saveAs(filePath); //文件另存到tomcat部署的项目文件夹中，不是当前项目物理位置
            }catch (SmartUploadException e){
                System.out.printf(filePath+"---------------------------------------");
                e.printStackTrace();
    
            }
    
    //     储存文件名（只是为了展示）
           request.getSession().setAttribute("src",saveUrl+mainFile+"."+extFile);
           request.getRequestDispatcher("/show.jsp").forward(request,response);
        }
    
    
    
    }

###  3: show.jsp ###

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
    <head>
        <title>Title</title>
    </head>  
    <style type="text/css">
    .file_icon{
      width: 134px;
      height: 134px;
      display: flex;
      border-radius: 50%;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }
    </style>
    
    <body>
    
    <%
    	String path = request.getContextPath();
    	String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
    	/* basePath = http://localhost:8080/项目名称/获取的是服务的访问地址 */
    %>
    
    <h1>文件目录以及文件名：${sessionScope.src}</h1>
    <h1>服务器地址：<%=basePath %></h1>
    <h1>文件地址：<%=basePath %>${sessionScope.src}</h1>
    
    <img alt="" src="<%=basePath %>${sessionScope.src}" class="file_icon">
    
    </body>
    </html>

### 4:效果图 ###

![70 1][]

[https_pan.baidu.com_s_1ta11516vz8XaDnN1jnQz6w]: https://pan.baidu.com/s/1ta11516vz8XaDnN1jnQz6w
[70]: /images/20220504/bc31e4883b97461a97677a3a1583bea6.png
[70 1]: /images/20220504/4cc534f71fab490aaf147f0e1df4be34.png