public String kaoshilist4() { HttpServletRequest request = ServletActionContext.getRequest(); String truename = request.getParameter("truename"); String username = request.getParameter("username"); StringBuffer sb = new StringBuffer(); sb.append(" where "); StringBuffer sb2 = new StringBuffer(); sb2.append(" where "); if(username!=null&&!"".equals(username)){ sb.append(" user.username like '%"+username+"%'"); sb.append(" and "); sb2.append(" user.username like '%"+username+"%'"); sb2.append(" and "); request.setAttribute("username", username); } if(truename!=null&&!"".equals(truename)){ sb.append(" user.truename like '%"+truename+"%'"); sb.append(" and "); sb2.append(" user.truename like '%"+truename+"%'"); sb2.append(" and "); request.setAttribute("truename", truename); } sb.append(" 1=1 order by id desc"); String where = sb.toString(); sb2.append(" 1=1 "); String where2 = sb2.toString(); int currentpage = 1; int pagesize = 20; if (request.getParameter("pageNum") != null) { currentpage = Integer.parseInt(request.getParameter("pageNum")); pagesize = Integer.parseInt(request.getParameter("numPerPage")); } int total = kaoshiDao.selectBeanCount(where2); request.setAttribute("list", kaoshiDao.selectBeanList((currentpage - 1)* pagesize, pagesize, where)); request.setAttribute("totalCount", total); request.setAttribute("ps", pagesize); request.setAttribute("pn", currentpage); request.setAttribute("url", "method!kaoshilist4"); this.setUrl("kaoshi/kaoshilist4.jsp"); return SUCCESS; }解释此代码
时间: 2023-07-19 15:56:48 浏览: 47
此代码是一个 Java Web 应用的一个 Action,用于返回考试列表的数据。主要实现逻辑是通过从 request 中获取参数,并拼接成查询语句,在数据库中查找对应的数据。其中,pageNum 和 numPerPage 是用于分页查询的参数,totalCount 是查询结果的总数,ps 和 pn 是分页需要的参数,url 是分页查询的链接地址。最终将查询结果和相应的参数设置到 request 中,然后跳转到 kaoshi/kaoshilist4.jsp 页面进行展示。
相关问题
HttpServletRequest request = ServletActionContext.getRequest(); User user = (User)request.getSession().getAttribute("user");
根据提供的引用内容,HttpServletRequest request = ServletActionContext.getRequest(); User user = (User)request.getSession().getAttribute("user"); 这段代码的作用是从当前请求中获取HttpServletRequest对象,然后从该对象的session中获取名为"user"的属性,并将其转换为User对象。这样可以获取当前用户的信息。
#### 引用[.reference_title]
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[ .reference_list ]
public static String download(String content) { HttpServletRequest request = Request.getRequest()
这段代码中,HttpServletRequest对象request是用来获取当前请求的信息的。Request.getRequest()方法是获取当前请求的HttpServletRequest对象的静态方法,它的具体实现可能依赖于Web框架或者Servlet容器。一般来说,这个方法可以获取到请求的一些基本信息,例如请求头、请求参数、请求方法、请求路径等。在这段代码中,通过获取HttpServletRequest对象,可以获取当前请求的上下文信息,例如请求所在的服务器路径、请求的IP地址、请求的URL地址等等,以便后续的操作。