Struts2文件上传

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用struts2来写文件上传是非常简单。

一、单文件上传

第一步写一个表单

 <body>      <form action="${pageContext.request.contextPath }/upload/UploadAction" method="post" enctype="multipart/form-data">         文件上传<input type="file" name="image"><br>         <input type="submit" value="上传">      </form>  </body>

第二步在struts.xml添加

 <package name="upload" namespace="/upload" extends="mypackage">     <action name="UploadAction" class="cn.hhtc.action.UploadAction" method="execute">            <result name="success">/success.jsp</result>     </action> </package>

第三步编写类UploadAction

package cn.hhtc.action;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;import java.io.OutputStream;import java.io.Serializable;import javax.servlet.ServletContext;import org.apache.commons.io.FileUtils;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;public class UploadAction extends ActionSupport implements Serializable {private File image;   //表单输入的文件private String imageFileName;//获取文件名private String imageContentType;//获得上传文件的类型MIME类型public File getImage() {return image;}public void setImage(File image) {this.image = image;}public String getImageFileName() {return imageFileName;}public void setImageFileName(String imageFileName) {this.imageFileName = imageFileName;}public String getImageContentType() {return imageContentType;}public void setImageContentType(String imageContentType) {this.imageContentType = imageContentType;}public String execute(){try {System.out.println(imageContentType);ServletContext sc = ServletActionContext.getServletContext();String storePath = sc.getRealPath("/files");//构建输入输出流//OutputStream out = new FileOutputStream(storePath+"\\"+imageFileName);//InputStream in = new FileInputStream(image);//byte[] b = new byte[1024];//int len = -1;//while((len=in.read(b))!=-1)//{//out.write(b, 0, len);//}//in.close();//out.close();FileUtils.copyFile(image, new File(storePath, imageFileName));//代替上面的ActionContext.getContext().put("message", "文件上传成功");return SUCCESS;} catch (Exception e) {e.printStackTrace();return ERROR;}}}

第四步，success.jsp

<body>文件上传成功</body>

注意一下 UploadAction里面的字段要跟表单里面的字段一致，文件名字段为表单文件名+FileName，文件类型为表单文件名+ContentType

二、多文件上传

第一步：写一个表单

<body>      <form action="${pageContext.request.contextPath }/upload2/UploadAction2" method="post" enctype="multipart/form-data">         文件上传<input type="file" name="images"><br>         文件上传<input type="file" name="images"><br>         <input type="submit" value="上传">      </form>  </body>

第二步配置struts.xml

 <package name="upload2" namespace="/upload2" extends="mypackage">     <action name="UploadAction2" class="cn.hhtc.action.UploadAction2" method="execute1">         <result name="success">/success.jsp</result>     </action> </package>

第三步写UploadAction2类

package cn.hhtc.action;import java.io.File;import java.io.IOException;import java.io.Serializable;import javax.servlet.ServletContext;import org.apache.commons.io.FileUtils;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;public class UploadAction2 extends ActionSupport implements Serializable {private File[] images;private String[] imagesFileName;private String[] imagesContentType;public File[] getImages() {return images;}public void setImages(File[] images) {this.images = images;}public String[] getImagesFileName() {return imagesFileName;}public void setImagesFileName(String[] imagesFileName) {this.imagesFileName = imagesFileName;}public String[] getImagesContentType() {return imagesContentType;}public void setImagesContentType(String[] imagesContentType) {this.imagesContentType = imagesContentType;}public String execute1(){try {if(images!=null &&images.length>0){ServletContext sc = ServletActionContext.getServletContext();String storeFile = sc.getRealPath("/files");for(int i=0; i<images.length; i++){FileUtils.copyFile(images[i], new File(storeFile, imagesFileName[i]));}}ActionContext.getContext().put("message", "<font color='red'>文件上传成功</font>");return SUCCESS;} catch (IOException e) {e.printStackTrace();return ERROR;}}}

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