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George Franciscus ([email protected]), è´è´£äºº, Nexcel

2005 å¹´ 10 æ 11 æ¥

Struts Recipes çåèè George Franciscus å°ä»ç»å¦ä¸ä¸ªéå¤§ç Struts æ´åçªé¨ ââ è¿æ¬¡æ¯å° Struts åºç¨ç¨åºå¯¼å¥ Spring æ¡æ¶ãè¯·è·é Georgeï¼ä»å°åæ¨å±ç¤ºå¦ä½æ¹å Struts å¨ä½ï¼ä½¿å¾ç®¡ç Struts å¨ä½å°±åç®¡ç Spring beans é£æ ·ãç»ææ¯ä¸ä¸ªå¢å¼ºç web æ¡æ¶ï¼è¿ä¸ªæ¡æ¶å¯ä»¥æ¹ä¾¿å°å©ç¨ Spring AOP çä¼å¿ã

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IOC å Spring

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æ´å Struts å Spring

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ä½¿ç¨ Spring ç ActionSupport ç±»æ´å Structs ä½¿ç¨ Spring ç DelegatingRequestProcessor è¦ç Struts ç RequestProcessor å° Struts Action ç®¡çå§æç» Spring æ¡æ¶

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æ è®ºæ¨ä½¿ç¨åªç§ææ¯ï¼é½éè¦ä½¿ç¨ Spring ç ContextLoaderPlugin ä¸º Struts ç ActionServlet è£è½½ Spring åºç¨ç¨åºç¯å¢ãå°±åæ·»å ä»»ä½å¶ä»æä»¶ä¸æ ·ï¼ç®åå°åæ¨ç struts-config.xml æä»¶æ·»å è¯¥æä»¶ï¼å¦ä¸æç¤ºï¼

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çªé¨ 1. ä½¿ç¨ Spring ç ActionSupport

æå¨åå»ºä¸ä¸ª Spring ç¯å¢æ¯ä¸ç§æ´å Struts å Spring çæç´è§çæ¹å¼ãä¸ºäºä½¿å®åå¾æ´ç®åï¼Spring æä¾äºä¸äºå¸®å©ãä¸ºäºæ¹ä¾¿å°è·å¾ Spring ç¯å¢ï¼org.springframework.web.struts.ActionSupport ç±»æä¾äºä¸ä¸ª getWebApplicationContext() æ¹æ³ãæ¨æåçåªæ¯ä» Spring ç ActionSupport èä¸æ¯ Struts Action ç±»æ©å±æ¨çå¨ä½ï¼å¦æ¸å 1 æç¤ºï¼

æ¸å 1. ä½¿ç¨ ActionSupport æ´å Struts package ca.nexcel.books.actions; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.ActionError; import org.apache.struts.action.ActionErrors; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import org.apache.struts.action.DynaActionForm; import org.springframework.context.ApplicationContext; import org.springframework.web.struts.ActionSupport; import ca.nexcel.books.beans.Book; import ca.nexcel.books.business.BookService; public class SearchSubmit extends ActionSupport { |(1) public ActionForward execute( ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { DynaActionForm searchForm = (DynaActionForm) form; String isbn = (String) searchForm.get("isbn"); //the old fashion way //BookService bookService = new BookServiceImpl(); ApplicationContext ctx = getWebApplicationContext(); |(2) BookService bookService = (BookService) ctx.getBean("bookService"); |(3) Book book = bookService.read(isbn.trim()); if (null == book) { ActionErrors errors = new ActionErrors(); errors.add(ActionErrors.GLOBAL_ERROR,new ActionError ("message.notfound")); saveErrors(request, errors); return mapping.findForward("failure") ; } request.setAttribute("book", book); return mapping.findForward("success"); } }

è®©æä»¬å¿«éæèä¸ä¸è¿éå°åºåçäºä»ä¹ãå¨ (1) å¤ï¼æéè¿ä» Spring ç ActionSupport ç±»èä¸æ¯ Struts ç Action ç±»è¿è¡æ©å±ï¼åå»ºäºä¸ä¸ªæ°ç Actionãå¨ (2) å¤ï¼æä½¿ç¨ getWebApplicationContext() æ¹æ³è·å¾ä¸ä¸ª ApplicationContextãä¸ºäºè·å¾ä¸å¡æå¡ï¼æä½¿ç¨å¨ (2) å¤è·å¾çç¯å¢å¨ (3) å¤æ¥æ¾ä¸ä¸ª Spring beanã

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çªé¨ 2. è¦ç RequestProcessor

å° Spring ä» Struts å¨ä½ä¸åç¦»æ¯ä¸ä¸ªæ´å·§å¦çè®¾è®¡éæ©ãåç¦»çä¸ç§æ¹æ³æ¯ä½¿ç¨ org.springframework.web.struts.DelegatingRequestProcessor ç±»æ¥è¦ç Struts ç RequestProcessor å¤çç¨åºï¼å¦æ¸å 2 æç¤ºï¼

æ¸å 2. éè¿ Spring ç DelegatingRequestProcessor è¿è¡æ´å |(1)

æå©ç¨äº æ è®°æ¥ç¨ DelegatingRequestProcessor è¦çé»è®¤ç Struts RequestProcessorãä¸ä¸æ¥æ¯å¨æç Spring éç½®æä»¶ä¸æ³¨åè¯¥å¨ä½ï¼å¦æ¸å 3 æç¤ºï¼

æ¸å 3. å¨ Spring éç½®æä»¶ä¸æ³¨åä¸ä¸ªå¨ä½ |(1)

æ¸å 4. å·æ JavaBean å±æ§ç Struts å¨ä½ package ca.nexcel.books.actions; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.Action; import org.apache.struts.action.ActionError; import org.apache.struts.action.ActionErrors; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import org.apache.struts.action.DynaActionForm; import ca.nexcel.books.beans.Book; import ca.nexcel.books.business.BookService; public class SearchSubmit extends Action { private BookService bookService; public BookService getBookService() { return bookService; } public void setBookService(BookService bookService) { | (1) this.bookService = bookService; } public ActionForward execute( ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { DynaActionForm searchForm = (DynaActionForm) form; String isbn = (String) searchForm.get("isbn"); Book book = getBookService().read(isbn.trim()); |(2) if (null == book) { ActionErrors errors = new ActionErrors(); errors.add(ActionErrors.GLOBAL_ERROR,new ActionError("message.notfound")); saveErrors(request, errors); return mapping.findForward("failure") ; } request.setAttribute("book", book); return mapping.findForward("success"); } }

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çªé¨ 3. å°å¨ä½ç®¡çå§æç» Spring

æ¸å 5 ä¸ç Action ç±»ä¸æ¸å 4 ä¸çç¸åãä½æ¯ struts-config æä¸äºä¸åï¼

æ¸å 5. Spring æ´åçå§ææ¹æ³

æ¸å 5 æ¯ä¸ä¸ªå¸åç struts-config.xml æä»¶ï¼åªæä¸ä¸ªå°å°çå·®å«ãå®æ³¨å Spring ä»£çç±»çåç§°ï¼èä¸æ¯å£°æå¨ä½çç±»åï¼å¦ï¼1ï¼å¤æç¤ºãDelegatingActionProxy ç±»ä½¿ç¨å¨ä½æ å°åç§°æ¥æ¾ Spring ç¯å¢ä¸çå¨ä½ãè¿å°±æ¯æä»¬ä½¿ç¨ ContextLoaderPlugIn å£°æçç¯å¢ã

æ¸å 6. å¨ Spring ç¯å¢ä¸æ³¨åä¸ä¸ª Struts å¨ä½

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æ¦æª Struts

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æ¸å 7. ä¸ä¸ªç®åçæ¥å¿è®°å½æ¦æªå¨ package ca.nexcel.books.interceptors; import org.springframework.aop.MethodBeforeAdvice; import java.lang.reflect.Method; public class LoggingInterceptor implements MethodBeforeAdvice { public void before(Method method, Object[] objects, Object o) throws Throwable { System.out.println("logging before!"); } }

æ¸å 8. å¨ Spring éç½®æä»¶ä¸æ³¨åæ¦æªå¨ |(1) |(2) /searchSubmit

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