struts2 Action里实现在前台弹出提示框

最新推荐文章于 2018-12-07 22:09:21 发布

Anthony_azy

最新推荐文章于 2018-12-07 22:09:21 发布

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分类专栏： Struts2+Spring4+Hibernate4

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本文介绍如何在 Struts2 的 Action 类中实现向前台发送提示信息，当用户选择课程时，根据业务逻辑成功或失败，通过设置 HttpServletResponse 内容类型为 HTML，并使用 PrintWriter 输出 JavaScript 脚本来弹出对话框并跳转页面。

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public class StudentAction extends ActionSupport implements ServletResponseAware{

	private static final long serialVersionUID = 1L;

	private HttpServletRequest request = null;
	private HttpServletResponse response;
	
	
	@Override
	public void setServletResponse(HttpServletResponse arg0) {
		this.response = arg0;
	}

	public HttpServletRequest getRequest() {
		return request;
	}

	public void setRequest(HttpServletRequest request) {
		this.request = request;
	}

	//选择课程
	public String selectCourse() throws IOException{
		String ctid=ServletActionContext.getRequest().getParameter("ctid");
		Student student=(Student)ActionContext.getContext().getSession().get("student");
		
		try {
			if (studentService.selectCourse(Integer.parseInt(ctid), student)){
				 response.setContentType("text/html;charset=utf-8");
				 PrintWriter out = response.getWriter();
				 out.print("<script>alert('选定成功！')</script>");
				 out.print("<script>window.location.href='/IntegrationManage/student/courseList.jsp'</script>");
				 out.flush();
	             out.close();
				 return null;
			}
		} catch (Exception e) {
			 response.setContentType("text/html;charset=utf-8");
			 PrintWriter out = response.getWriter();
			 out.print("<script>alert('对不起你已经选过该课程！')</script>");
			 out.print("<script>window.location.href='/IntegrationManage/student/courseList.jsp'</script>");
			 out.flush();
             out.close();
			 return null;
		}
		return SUCCESS;
	}
}