Struts2实现文件上传

我不是女神ヾ 2021-07-24 23:52 519阅读 0赞

**一 视图**

1 uploadForm.jsp

<%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %>
    <%@taglib prefix="s" uri="/struts-tags"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title>简单的文件上传</title>
    </head>
    <body>
    <s:form action="upload"
        enctype="multipart/form-data">
        <s:textfield name="title" label="文件标题"/>
        <s:file name="upload" label="选择文件"/>
        <s:submit value="上传"/>
    </s:form>
    </body>
    </html>

2 succ.jsp

<%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %>
    <%@taglib prefix="s" uri="/struts-tags"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title>上传成功</title>
    </head>
    <body>
        上传成功!<br/>
        文件标题:<s:property value=" + title"/><br/>
        文件为：<img src="<s:property value="'uploadFiles/'
            + uploadFileName"/>"/><br/>
    </body>
    </html>

**二 配置文件**

<?xml version="1.0" encoding="GBK"?>
    <!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
        "http://struts.apache.org/dtds/struts-2.3.dtd">    
    <struts>
        
        <constant name="struts.i18n.encoding" value="GBK"/>
        <package name="lee" extends="struts-default">
            
            <action name="upload" class="org.crazyit.app.action.UploadAction">
                
                <param name="savePath">/uploadFiles</param>
                
                <result>/WEB-INF/content/succ.jsp</result>    
            </action>
            <action name="*">
                <result>/WEB-INF/content/{1}.jsp</result>    
            </action>
        </package>
    </struts>

**三 action**

package org.crazyit.app.action;
    
    import com.opensymphony.xwork2.Action;
    import com.opensymphony.xwork2.ActionSupport;
    import org.apache.struts2.ServletActionContext;
    
    import java.io.File;
    import java.io.*;
    
    
    public class UploadAction extends ActionSupport
    {
        // 封装文件标题请求参数的属性
        private String title;
        // 封装上传文件域的属性
        private File upload;
        // 封装上传文件类型的属性
        private String uploadContentType;
        // 封装上传文件名的属性
        private String uploadFileName;
        // 直接在struts.xml文件中配置的属性
        private String savePath;
        // 接受struts.xml文件配置值的方法
        public void setSavePath(String value)
        {
            this.savePath = value;
        }
        // 获取上传文件的保存位置
        private String getSavePath() throws Exception
        {
            return ServletActionContext.getServletContext()
                .getRealPath(savePath);
        }
    
        // title的setter和getter方法
        public void setTitle(String title)
        {
            this.title = title;
        }
        public String getTitle()
        {
            return (this.title);
        }
    
        // upload的setter和getter方法
        public void setUpload(File upload)
        {
            this.upload = upload;
        }
        public File getUpload()
        {
            return (this.upload);
        }
    
        // uploadContentType的setter和getter方法
        public void setUploadContentType(String uploadContentType)
        {
            this.uploadContentType = uploadContentType;
        }
        public String getUploadContentType()
        {
            return (this.uploadContentType);
        }
    
        // uploadFileName的setter和getter方法
        public void setUploadFileName(String uploadFileName)
        {
            this.uploadFileName = uploadFileName;
        }
        public String getUploadFileName()
        {
            return (this.uploadFileName);
        }
    
        @Override
        public String execute() throws Exception
        {
            // 以服务器的文件保存地址和原文件名建立上传文件输出流
            FileOutputStream fos = new FileOutputStream(getSavePath()
                + "\\" + getUploadFileName());
            FileInputStream fis = new FileInputStream(getUpload());
            byte[] buffer = new byte[1024];
            int len = 0;
            while ((len = fis.read(buffer)) > 0)
            {
                fos.write(buffer , 0 , len);
            }
            fos.close();
            return SUCCESS;
        }
    }

**四 测试**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 1][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70]: /images/20210724/142d34958eaf4dc89aa9719d2aa0bd17.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 1]: /images/20210724/74f2ad3685d14992b5ab4ca87cf025e8.png