<link rel="stylesheet" type="text/css" href="css/fileinput.min.css" rel="external nofollow" >
<script type="text/javascript" src="js/fileinput.min.js"></script>

  <form action="uploadAction" method="post" enctype="multipart/form-data"
    id="myform">
    <!-- 圖片標題   -->
    <input class="form-control" type="text" name="img_title"
      id="img_title" size="100" value="請輸入圖片名稱" 
      onfocus='if(this.value=="請輸入圖片名稱"){this.value="";};'
      onblur='if(this.value==""){this.value="請輸入圖片名稱";};'> <br />
    <!-- 下拉框 -->
    <select name="img_state">
      <option selected="selected">請選擇審核狀態</option>
      <c:forEach items="${stateList }" var="sl">
        <option value="${sl.s_id }">${sl.s_statename}</option>
      </c:forEach>
    </select> <br />
    <br />
    <!-- 圖片上傳控件 -->
    <input type="file" name="file" id="file" class="file" /> <br>
  </form>
  <center>
    <a href="executeimages" rel="external nofollow" class="btn btn-success">返回圖集</a>
  </center>

package com.Action;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.List;

import org.apache.struts2.ServletActionContext;

import Enity.cms_images;
import Enity.cms_state;
import SQL_Implements.images_sql_Implem;

import com.opensymphony.xwork2.ActionSupport;

@SuppressWarnings("serial")
public class uploadAction extends ActionSupport {
  /**
   * 這里集合形式輸入到流，防止上傳重復文件,減少服務器壓力
   */
  private String img_title;// 圖片標題
  private int img_state;// 狀態
  // 上傳文件存放路徑
  private final static String uploadAddres = "/uploadFile";

  // 上傳文件集合泛型為file對象
  private List<File> file;
  // 上傳文件名集合
  private List<String> fileFileName;
  // 上傳文件內容類型集合
  private List<String> fileContentType;

  cms_images images = new cms_images();
  cms_state state = new cms_state();// 實例狀態類
  private images_sql_Implem isi;
  cms_imagesAction cia;

  public cms_imagesAction getCia() {
    return cia;
  }

  public void setCia(cms_imagesAction cia) {
    this.cia = cia;
  }

  public int getImg_state() {
    return img_state;
  }

  public void setImg_state(int img_state) {
    this.img_state = img_state;
  }

  public cms_state getState() {
    return state;
  }

  public void setState(cms_state state) {
    this.state = state;
  }

  public images_sql_Implem getIsi() {
    return isi;
  }

  public void setIsi(images_sql_Implem isi) {
    this.isi = isi;
  }

  public static String getUploadaddres() {
    return uploadAddres;
  }

  public cms_images getImages() {
    return images;
  }

  public void setImages(cms_images images) {
    this.images = images;
  }

  public String getImg_title() {
    return img_title;
  }

  public void setImg_title(String img_title) {
    this.img_title = img_title;
  }

  public List<File> getFile() {
    return file;
  }

  public void setFile(List<File> file) {
    this.file = file;
  }

  public List<String> getFileFileName() {
    return fileFileName;
  }

  public void setFileFileName(List<String> fileFileName) {
    this.fileFileName = fileFileName;
  }

  public List<String> getFileContentType() {
    return fileContentType;
  }

  public void setFileContentType(List<String> fileContentType) {
    this.fileContentType = fileContentType;
  }

  // 上傳方法
  public String execute() throws Exception {
    // 打印文件名稱
    System.out.println("文件名稱:" + this.getFileFileName());
    for (int i = 0; i < file.size(); i++) {
      // 循環上傳每個文件
      uploadFile(i);
    }
    /**
     * 這里有bug 想每次添加完后能在查詢一遍下拉框的值
     */
    // cia.execute();
    return "uploadSuccess";
  }

  // 調用執行上傳功能
  @SuppressWarnings("deprecation")
  public void uploadFile(int i) throws FileNotFoundException, IOException {
    try {
      InputStream in = new FileInputStream(file.get(i));
      // ServletActionContext對象響應獲取實際文件地址,getRealPath已經廢棄不推薦用了
      String dir = ServletActionContext.getRequest().getRealPath(
          uploadAddres);
      System.out.println("服務器路徑：" + dir);
      // 獲取文件名稱
      String fileName = this.getFileFileName().get(i);
      // 路徑和文件名丟進file對象里
      File uploadFile = new File(dir, fileName);
      // 輸出流
      OutputStream out = new FileOutputStream(uploadFile);
      // 設置文件大小1MB
      byte[] buffer = new byte[1024 * 1024];
      int length;
      // 用循環從流中讀取文件的大小
      while ((length = in.read(buffer)) > 0) {
        out.write(buffer, 0, length);
      }

      // 設置圖片標題和全路徑
      images.setImg_title(img_title);
      String imgURL = dir + "/" + fileName;
      // 將全路徑截取為相對路徑
      String strURL = imgURL.substring(32);
      images.setImg_url(strURL);

      // 設置狀態的id，并將id對象傳入
      state.setS_id(img_state);
      images.setImg_state(state);
      // 添加圖片的信息
      int num = isi.addIMG(images);
      System.out.println("是否上傳了信息：" + num);
      // 關閉輸入流輸出流，釋放內存
      in.close();
      out.close();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}