struts2上傳

今天在使用struts2上傳的過程中無意發現,struts2上傳一個文件大小為0字節的文本竟然會報錯FileNotFoundException,嘗試了好久也沒找到答案,最后只能判斷文件的大小后上傳,至于文件字節為0的怎么處理就看各位了

struts2上傳java源碼

package com.jzgx.web.action;

import java.io.File;

import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Result;

import com.opensymphony.xwork2.ActionSupport;

@Action(value="fileUpload",results={@Result(name="success",location="/result.jsp"),@Result(name="input",location="/error.jsp")})
public class FileUploadAction extends ActionSupport{
    
    /* 上傳文件*/
    private File doc;
    /* 上傳文件名稱  */
    private String docFileName;
    /* 獲取上傳文件類型*/
    private String docContentType;

    @Override
    public String execute() throws Exception {
        try{
            //1.獲得文件上傳的上傳目錄
            String realPath=ServletActionContext.getServletContext().getRealPath("/upload");
            //2.設置保存目標文件的路徑和文件名
            File target=new File(realPath+File.separator+this.getDocFileName());
            //如果doc.length()=0會出現FileNotFoundException,沒想到好的解決方法,暫時先過濾掉
            if(doc.length()!=0){
                //3.copy文件內容，上傳文件
                FileUtils.copyFile(doc, target);
            }
            return "success";
        }catch(Exception e){
            e.printStackTrace();
            return "error";
        }
    }
    
    public String getDocFileName() {
        return docFileName;
    }
    public void setDocFileName(String docFileName) {
        this.docFileName = docFileName;
    }

    public File getDoc() {
        return doc;
    }
    public void setDoc(File doc) {
        this.doc = doc;
    }

    public String getDocContentType() {
        return docContentType;
    }
    public void setDocContentType(String docContentType) {
        this.docContentType = docContentType;
    }
}

struts.xml配置文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
    <!-- web應用編碼字符集 采用GBK-->
    <constant name="struts.i18n.encoding" value="GBK"></constant>
    <!-- 上傳文件的大小限制設成2G -->
    <constant name="struts.multipart.maxSize" value="2097152000"></constant>
</struts>

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