Struts 上传和下载功能

Struts上面自带了上传和下载功能，使用非常方便

下面做一个简单的上传下载例子：


单文件上传：

首先配置Struts中核心控制器filter

web.xml

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  3.   <display-name>StrutsUpload</display-name>
  4.   <filter>
  5.     <filter-name>Struts</filter-name>
  6.     <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  7.   </filter>
  8.   <filter-mapping>
  9.     <filter-name>Struts</filter-name>
  10.     <url-pattern>/*</url-pattern>
  11.   </filter-mapping>
  12. </web-app>

action：

  1. package action;
  3. import java.io.File;
  4. import java.io.IOException;
  6. import org.apache.commons.io.FileUtils;
  8. import com.opensymphony.xwork2.ActionSupport;
  10. /**
  11. * @Author:Z.J.
  12. * @Date:2016年3月14日 下午8:38:06
  13. * 说明
  14. */
  15. public class FileUpLoadAction extends ActionSupport {
  16. 	private static final long serialVersionUID = 1L;
  17. 	
  18. 	private File file;//文件，与页面中input的name一定要保持一致
  19. 	private String fileFileName;
  20. 	private String fileContentType;
  21. 	private String fileDescript;
  22. 	public String upload(){
  23. 		System.out.println("上传功能");
  24. 		System.out.println(file);
  25. 		System.out.println(fileFileName);
  26. 		System.out.println(fileContentType);
  27. 		System.out.println(fileDescript);
  28. 		//保存文件
  29. 		try {
  30. 			FileUtils.copyFile(file, new File("/Users/zjing/ZWorkspace/zjImage/"+fileFileName));
  31. 		} catch (IOException e) {
  32. 			e.printStackTrace();
  33. 		}
  34. 		return SUCCESS;
  35. 	}
  36. 	public File getFile() {
  37. 		return file;
  38. 	}
  39. 	public void setFile(File file) {
  40. 		this.file = file;
  41. 	}
  42. 	public String getFileFileName() {
  43. 		return fileFileName;
  44. 	}
  45. 	public void setFileFileName(String fileFileName) {
  46. 		this.fileFileName = fileFileName;
  47. 	}
  48. 	public String getFileContentType() {
  49. 		return fileContentType;
  50. 	}
  51. 	public void setFileContentType(String fileContentType) {
  52. 		this.fileContentType = fileContentType;
  53. 	}
  54. 	public String getFileDescript() {
  55. 		return fileDescript;
  56. 	}
  57. 	public void setFileDescript(String fileDescript) {
  58. 		this.fileDescript = fileDescript;
  59. 	}
  60. }

jsp页面：

  1. <%@ page language="java" contentType="text/html; charset=UTF-8"
  2.     pageEncoding="UTF-8"%>
  3. <!DOCTYPE html>
  4. <html>
  5. <head>
  6. <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  7. <title>上传</title>
  8. </head>
  9. <body>
  10. 	<form action="upload" method="post" enctype="multipart/form-data">
  11. 		文件:<input type="file" name="file"/><br/>
  12. 		描述:<input type="text" name="fileDescript"/><br/>
  13. 		<input type="submit" value="上传"/>
  14. 	</form>
  15. </body>
  16. </html>
  1. <%@ page language="java" contentType="text/html; charset=UTF-8"
  2.     pageEncoding="UTF-8"%>
  3. <!DOCTYPE html>
  4. <html>
  5. <head>
  6. <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  7. <title>上传成功</title>
  8. </head>
  9. <body>
  10. 	<h3>上传成功！</h3>
  11. </body>
  12. </html>

index.jsp

struts.xml 配置

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "struts-2.3.dtd" >
  3. <struts>
  4. 	<!-- 修改临时文件目录 -->
  5. 	<constant name="struts.multipart.saveDir" value="/Users/zjing/ZWorkspace/zjTemp"></constant>

  1. <package name="file" namespace="/" extends="struts-default" >
  2. 	<!-- 单文件上传 -->
  3. 	<action name="upload" class="action.FileUpLoadAction" method="upload">
  4. 	    <result>/index.jsp</result>
  5. 	</action>			

  1. 	</package>
  2. </struts>


多文件上传：

  1. <%@ page language="java" contentType="text/html; charset=UTF-8"
  2.     pageEncoding="UTF-8"%>
  3. <!DOCTYPE html>
  4. <html>
  5. <head>
  6. <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  7. <title>多文件上传</title>
  8. </head>
  9. <body>
  10. 	<form action="upload2" method="post" enctype="multipart/form-data">
  11. 		文件1:<input type="file" name="file"/><br/>
  12. 		文件2:<input type="file" name="file"/><br/>
  13. 		文件3:<input type="file" name="file"/><br/>
  14. 		描述:<input type="text" name="descript"/>
  15. 		<br/>
  16. 		<input type="submit" value="上传"/>
  17. 		
  18. 	</form>
  19. </body>
  20. </html>

action

  1. package action;
  3. import java.io.File;
  4. import java.io.IOException;
  6. import org.apache.commons.io.FileUtils;
  8. import com.opensymphony.xwork2.ActionSupport;
  10. /**
  11. * @Author:Z.J.
  12. * @Date:2016年3月14日 下午9:13:44
  13. *	多文件上传
  14. */
  16. public class MultiUploadAction extends ActionSupport{
  17. 	
  18. 	private static final long serialVersionUID = 1L;
  19. 	
  20. 	private File[] file;
  21. 	private String[] fileFileName;
  22. 	private String[] fileContentType;
  23. 	private String descript;
  24. 	//多文件上传
  25. 	public String multiUpload() throws IOException{
  26. 		if (file!=null) {
  27. 			for (int i = 0; i < file.length; i++) {
  28. 				System.out.println(file[i]);
  29. 				System.out.println(fileFileName[i]);
  30. 				System.out.println(fileContentType[i]);
  31. 				//保存文件
  32. 				FileUtils.copyFile(file[i], new File("/Users/zjing/ZWorkspace/zjImage/"+fileFileName[i]));
  33. 				
  34. 			}
  35. 			System.out.println(descript);
  36. 		}
  37. 		
  38. 		
  39. 		return SUCCESS;
  40. 	}
  42. 	public File[] getFile() {
  43. 		return file;
  44. 	}
  46. 	public void setFile(File[] file) {
  47. 		this.file = file;
  48. 	}
  50. 	public String[] getFileFileName() {
  51. 		return fileFileName;
  52. 	}
  54. 	public void setFileFileName(String[] fileFileName) {
  55. 		this.fileFileName = fileFileName;
  56. 	}
  58. 	public String[] getFileContentType() {
  59. 		return fileContentType;
  60. 	}
  62. 	public void setFileContentType(String[] fileContentType) {
  63. 		this.fileContentType = fileContentType;
  64. 	}
  66. 	public String getDescript() {
  67. 		return descript;
  68. 	}
  70. 	public void setDescript(String descript) {
  71. 		this.descript = descript;
  72. 	}
  73. 	
  74. }

配置action：

  1. <!-- 多文件上传 -->
  2. 		<action name="upload2" class="action.MultiUploadAction" method="multiUpload">
  3. 			<result>/index.jsp</result>
  4. 		</action>


Struts下载

action

  1. package action;
  3. import java.io.File;
  4. import java.io.FileInputStream;
  5. import java.io.FileNotFoundException;
  6. import java.io.InputStream;
  8. import com.opensymphony.xwork2.ActionSupport;
  10. /**
  11. * @Author:Z.J.
  12. * @Date:2016年3月15日 下午8:50:20
  13. * 下载的action
  14. */
  16. public class DownLoadAction extends ActionSupport{
  18. 	private static final long serialVersionUID = 1L;
  19. 	
  20. 	//用于保存文件名
  21. 	private String fileName;
  22. 	
  23. 	//下载的方法
  24. 	public String down() throws Exception{
  25. 		System.out.println("下载文件");
  26. 		return "down";//发出二进制数据流
  27. 	}
  28. 	
  29. 	//给SteamResult的inputName 属性提供一个getter方法，用于返回输入流
  30. 	public InputStream getFileStream(){
  31. 		try {
  32. 			File file =  new File("/Users/zjing/ZJ壁纸/hualu.jpg");
  33. 			fileName = file.getName();
  34. 			FileInputStream fis = new FileInputStream(file);
  35. 			return fis;
  36. 		} catch (FileNotFoundException e) {
  37. 			e.printStackTrace();
  38. 			throw new RuntimeException(e);
  39. 		}
  40. 	}
  41. 	//提供一个getter方法用于给struts.xml 文件获取文件名
  42. 	public String getFileName() {
  43. 		return fileName;
  44. 	}
  45. 	
  46. }

在struts.xml中配置action

  1. <!-- 文件下载 -->
  2. 		<action name="down" class="action.DownLoadAction" method="down">
  3. 			<result name="down" type="stream">
  4. 				<!-- 下载的文件类型：通用的可以使用二进制类型 -->
  5. 				<param name="contentType">application/octet-stream</param>
  6. 				<!-- 下载的提示框 -->
  7. 				<param name="contentDisposition">attachment;filename=${fileName}</param>
  8. 				<!-- 需要下载的文件输入流 -->
  9. 				<param name="inputName">fileStream</param>
  10. 				<!-- 缓存区大小 -->
  11. 				<param name="bufferSize">512</param>
  12. 			</result>
  13. 		</action>







posted @ 2016-03-17 16:20  ZJinger  阅读(239)  评论(0)    收藏  举报