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;

}

}