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

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