Question

在Struts2的Action中取得请求参数值的几种方法

Answer 1

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; } }