代码如下

package com.ming;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;import org.apache.commons.fileupload.FileUpload;import org.apache.commons.io.FileUtils;import org.apache.logging.log4j.LogManager;import org.apache.logging.log4j.Logger;import org.apache.struts2.ServletActionContext;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.util.Date;import java.util.Map;public class uploadFile extends ActionSupport {    private File myFile;    private String myFileContentType;    private String myFileFileName;    private String destPath;    @Override    public String execute()    {        Logger logger = LogManager.getLogger();        // 获取到Action执行的上下文        destPath = ServletActionContext.getServletContext().getRealPath("/");        // 拼接目录        destPath = destPath + "upload/";        // 新建文件        File tmpFile = new File(destPath, new Date().toString() + this.myFileFileName);        try{            FileUtils.copyFile(myFile, tmpFile);        }catch (Exception e){            logger.info(e);        }        logger.info(myFileContentType);        return SUCCESS;    }    public File getMyFile() {        return myFile;    }    public void setMyFile(File myFile) {        this.myFile = myFile;    }    public String getMyFileContentType() {        return myFileContentType;    }    public void setMyFileContentType(String myFileContentType) {        this.myFileContentType = myFileContentType;    }    public String getMyFileFileName() {        return myFileFileName;    }    public void setMyFileFileName(String myFileFileName) {        this.myFileFileName = myFileFileName;    }}

核心思路 是 获取到当前action上下文件,接着获取容器上下文,在进行绝对路径拼接,拼接完成以后,新建file文件,然后,文件内容写入即可.

配置文件

    
        
         
         
         
             
                  
                   
                       
        image/jpeg,image/gif            
                   
       
        /success.jsp
                   
       
        /error.jsp