struts 学习

1、在Struts2的Action中取得请求参数值的几种方法

 public class GetRequestParameterAction extends ActionSupport {

     private String bookName;
     private String bookPrice;

     public String getBookName() {
         return bookName;
     }

     public void setBookName(String bookName) {
         this.bookName = bookName;
     }

     public String getBookPrice() {
         return bookPrice;
     }

     public void setBookPrice(String bookPrice) {
         this.bookPrice = bookPrice;
     }

     public String  execute() throws Exception{

         //方式一： 将参数作为Ａction的类属性，让OGNL自动填充

         System.out.println("方法一，把参数作为Action的类属性,让OGNL自动填充：");
         System.out.println("bookName: "+this.bookName);
         System.out.println("bookPrice: " +this.bookPrice);

         //方法二:在Action中使用ActionContext得到parameterMap获取参数:
         ActionContext context=ActionContext.getContext();
         Map  parameterMap=context.getParameters();

         String bookName2[]=(String[])parameterMap.get("bookName");
         String bookPrice2[]=(String[])parameterMap.get("bookPrice");

         System.out.println("方法二，在Action中使用ActionContext得到parameterMap获取参数：");
         System.out.println("bookName: " +bookName2[0]);
         System.out.println("bookPrice: " +bookPrice2[0]);

         //方法三:在Action中取得HttpServletRequest对象，使用request.getParameter获取参数
         HttpServletRequest request = (HttpServletRequest)context.get(ServletActionContext.HTTP_REQUEST); 

         String bookName=request.getParameter("bookName");
         String bookPrice=request.getParameter("bookPrice");

         System.out.println("方法三，在Action中取得HttpServletRequest对象，使用request.getParameter获取参数：");
         System.out.println("bookName: " +bookName);
         System.out.println("bookPrice: " +bookPrice);
         return SUCCESS;

     }

 }

2、Taglib Struts标签库

学习使用，谢谢博主！