struts2 spring4 圖檔上傳

簡介：

使用 struts2 和 spring 實作的一個簡單的圖檔上傳。

依賴：

Spring IoC相關jar包：

IoC:

commons-logging.jar

spring-beans-*.RELEASE.jar

spring-context-*.RELEASE.jar

spring-core-*.RELEASE.jar

spring-expression-*.RELEASE.jar

struts2需要jar包:

commons-fileupload-1.3.1.jar

commons-io-2.2.jar

commons-lang3-3.2.jar

freemarker-2.3.19.jar

javassist-3.11.0.GA.jar

log4j-1.2.17.jar

ognl-3.0.6.jar

struts2-core-2.3.20.jar

xwork-core-2.3.20.jar

web.xml配置：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
  <listener>
  	<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>
 
 
  <display-name>Strtus2FileUpLoad</display-name>
  <filter>
    <filter-name>struts2</filter-name>
    <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>struts2</filter-name>
    <url-pattern>*.action</url-pattern>
  </filter-mapping>
</web-app>
           

applicationContext.xml配置：

<!-- 掃描Srping元件 -->
	<context:component-scan base-package="action"></context:component-scan>
	<context:component-scan base-package="impl"></context:component-scan>
	<context:component-scan base-package="service"></context:component-scan>
	
	<!-- 載入上傳類型設定 -->
	<util:properties id="uploadType" location="classpath:upload.properties"></util:properties>
           

struts.xml配置：

<struts>
	<package name="fileUpLoad" namespace="/file" extends="struts-default">
		<!-- 使用spring注入Action -->
		<action name="upload" class="uploadAction">
			<result name="success">/success.jsp</result>
			<result name="error">/error.jsp</result>
		</action>
	</package>
</struts>   
           

配置檔案properties：

struts.properties配置:

#struts setting file
#Priority is higher than the XML configuration file
#set max size 2M
struts.multipart.maxSize=2097152
#set temp save dir
struts.multipart.saveDir=uptemp
#set encoding
struts.i18n.encoding=UTF-8
#set load multiple custom properties split for ,
struts.custom.properties=,
           

upload.properties配置：

設定允許上傳的檔案類型

#set upload type split by ','
upload.type.image=jpeg,png,gif
           

DAO層代碼：

@Repository("uploadImpl")
public class FileUpLoadDAOImpl implements FileUpLoadDAO {

	/**
	 * 複制struts上傳的臨時檔案到指定目錄
	 * @param src   上傳的檔案
	 * @param dest  指定目錄
	 * @return
	 */
	public void copy(File src, File dest) throws Exception {
		
		BufferedInputStream bis = new BufferedInputStream(new FileInputStream(src));
		BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(dest));
		byte [] buf = new byte [1024];
		@SuppressWarnings("unused")
		int len = -1;
		while((len = bis.read(buf)) != -1) {
			bos.write(buf);
		}
		bis.close();
		bos.close();
			
	}
	
	/**
	 * 儲存檔案路徑
	 * @param path
	 */
	public void savePath(String path) throws Exception {
		//儲存檔案路徑到資料庫
	}

}
           

Service層代碼

@Service("uploadService")
public class FileUpLoadService {

	@Resource(name="uploadImpl")	
	private FileUpLoadDAO fileUpLoad;
	
	/**
	 * 上傳圖檔
	 * @param src
	 * @param dest
	 * @return
	 */
	public boolean upload(File src, File dest){
		try {
			fileUpLoad.copy(src, dest);
		} catch (Exception e) {
			e.printStackTrace();
			return false;
		}
		return true;
	}
	
	/**
	 * 儲存圖檔路徑
	 * @param path
	 * @return
	 */
	public boolean savePath(String path) {
		//儲存成功傳回true，失敗傳回false
		try {
			fileUpLoad.savePath(path);
		} catch (Exception e) {
			e.printStackTrace();
			return false;
		}
		return true;
	}
}
           

action代碼：

/**
 * 用于執行檔案上傳的Action
 * @author haifeng
 *
 */
@Component("uploadAction")
public class FileUpLoadAction {
	
	private File file;		//攔截器傳入的臨時檔案,變量命名方式[和檔案上傳空間的name一緻]
	private String fileFileName;//攔截器注入的原始檔案名，變量命名方式[*FileName]
	private String fileContentType; // 上傳檔案類型，變量命名方式[*ContentType],用于限制檔案類型
	@Resource(name="uploadService") 
	private FileUpLoadService upLoadService;
	@Resource(name="uploadType")
	private Properties properties;
	/**
	 * 執行檔案上傳
	 * @return
	 * @throws Exception
	 */
	public String execute() throws Exception {
		//擷取配置檔案中設定的檔案類型，用,分割
		String prop = properties.getProperty("upload.type.image");
		String [] types = prop.split(",");
		if(types.length>0 && types!=null)
		for(String t : types) {
			//判斷是否有符合要求的檔案類型
			//由于圖檔的分類都是以image/開頭，為避免不必要的重複書寫，直接在程式裡進行拼接，以簡化配置檔案
			//忽略大小寫
			if(("image/"+t).equalsIgnoreCase(fileContentType)) {
				//執行上傳邏輯
				
				//截取檔案字尾
				String suffix = fileFileName.substring(fileFileName.lastIndexOf("."));
				//根據目前系統時間毫秒值生成新的檔案名
				String newName = Calendar.getInstance().getTimeInMillis() + suffix;
				//根據項目部署路徑計算檔案上傳的完整路徑
				String path = ServletActionContext.getServletContext().getRealPath("/upload/"+newName);
				//将臨時檔案複制到上傳路徑下
				boolean flag = upLoadService.upload(file, new File(path));
				if(!flag){
					return "error";
				}
				//儲存路徑到資料庫
				flag = upLoadService.savePath(path);
				if(!flag) {
					return "error";
				}
			}
		}
		return "error";
	}

	public File getFile() {
		return file;
	}

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


	public String getFileFileName() {
		return fileFileName;
	}

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

	public String getFileContentType() {
		return fileContentType;
	}

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

	
}
           

upload.jsp

<form action="file/upload.action" enctype="multipart/form-data" method="POST">
   		<input type="file" name="file">
   		<input type="submit" value="上傳">
   </form>