struts 2フロントパラメータを受信する3つの方法

01.public class GetRequestParameterAction extends ActionSupport {   
02.  
03.    private String bookName;   
04.    private String bookPrice;   
05.       
06.    public String getBookName() {   
07.        return bookName;   
08.    }   
09.  
10.    public void setBookName(String bookName) {   
11.        this.bookName = bookName;   
12.    }   
13.  
14.    public String getBookPrice() {   
15.        return bookPrice;   
16.    }   
17.  
18.    public void setBookPrice(String bookPrice) {   
19.        this.bookPrice = bookPrice;   
20.    }   
21.       
22.       
23.    public String  execute() throws Exception{   
24.           
25.           
26.        // ：  Ａction ， OGNL    
27.            
28.        System.out.println(" ， Action , OGNL ：");   
29.        System.out.println("bookName: "+this.bookName);   
30.        System.out.println("bookPrice: " +this.bookPrice);   
31.           
32.           
33.        // : Action ActionContext parameterMap :   
34.        ActionContext context=ActionContext.getContext();   
35.        Map  parameterMap=context.getParameters();   
36.           
37.        String bookName2[]=(String[])parameterMap.get("bookName");   
38.        String bookPrice2[]=(String[])parameterMap.get("bookPrice");   
39.           
40.        System.out.println(" ， Action ActionContext parameterMap ：");   
41.        System.out.println("bookName: " +bookName2[0]);   
42.        System.out.println("bookPrice: " +bookPrice2[0]);   
43.           
44.           
45.        // : Action HttpServletRequest ， request.getParameter    
46.        HttpServletRequest request = (HttpServletRequest)context.get(ServletActionContext.HTTP_REQUEST);    
47.            
48.        String bookName=request.getParameter("bookName");   
49.        String bookPrice=request.getParameter("bookPrice");   
50.           
51.        System.out.println(" ， Action HttpServletRequest ， request.getParameter ：");   
52.        System.out.println("bookName: " +bookName);   
53.        System.out.println("bookPrice: " +bookPrice);   
54.        return SUCCESS;   
55.           
56.    }   
57.  
58.}