我的SSH项目之旅(7.个人中心之分页和Junit测试)

接下来开发 个人中心   个人中心包括内容： 1、 修改个人信息 2、 列出我提出的问题 3、 列出我回答过的问题 4、 列出被采纳的问题 分页大概的流程 从后台 DAO 去数据   public List queryByItem( int itemid, int currentPage, int lineSize )       throws Exception {     // TODO Auto-generated method stub     List all = null ;     String hql = "FROM Question AS q WHERE q.itemid=?" ;     Query q = super .getSession().createQuery(hql);     q.setInteger(0, itemid);     q.setFirstResult((currentPage - 1) * lineSize);     q.setMaxResults(lineSize);     all = q.list();     return all;     } 经过 struts action public ActionForward selectitem(ActionMapping mapping, ActionForm form,       HttpServletRequest request, HttpServletResponse response) {     List all = null ;     int currentPage = 1;     int lineSize = 10;     int allRecorders = 0;     try {       currentPage = Integer.parseInt(request.getParameter("cp"));     } catch (Exception e) {     }     try {       allRecorders = this.questiondao.getByItemCount(Integer             .parseInt(request.getParameter("itemid")));       all = this.questiondao.queryByItem(Integer.parseInt(request             .getParameter("itemid")), currentPage, lineSize);     } catch (NumberFormatException e) {       // TODO Auto-generated catch block       e.printStackTrace();     } catch (Exception e) {       // TODO Auto-generated catch block       e.printStackTrace();     }     request.setAttribute("currentPage", currentPage);     request.setAttribute("lineSize", lineSize);     request.setAttribute("allRecorders", allRecorders);     request.setAttribute("all", all);     request.setAttribute("jspUrl", "show.do");     request.setAttribute("status", "selectitem");     request.setAttribute("flagname", "itemid");     request.setAttribute("flagvalue", request.getParameter("itemid"));     try {       request.setAttribute( "allitem" , this . itemdao .queryAll());     } catch (Exception e) {       e.printStackTrace();     }     return mapping.findForward( "showlist" );   } 在JSP页面嵌入相关代码   < jsp:include page = "split_page.jsp" >     < jsp:param name = " jspUrl " value = "${jspUrl}" />     < jsp:param name = " lineSize " value = "${lineSize}"/> 每页显示条数     < jsp:param name = " allRecorders " value = "${allRecorders}" />     < jsp:param name = " keyWord " value = "<%=request.getAttribute("keyWord")%>" />     < jsp:param name = " currentPage " value = "${currentPage}" />     < jsp:param name = " status " value = "${status}" />     < jsp:param name = " flagname " value = "${flagname}" />     < jsp:param name = " flagvalue " value = "${flagvalue}" />     < jsp:param name = "searchFlag" value = "T" />   </ jsp:include > 分页程序部分代码 split_page.jsp // 计算总页数   pageSize = ( allRecorders + lineSize -1)/ lineSize ; < form name = "spage" action = "<%=jspUrl%>" onSubmit="change()"> < input type = "hidden"   name = "status" value = "${status}"> <input type="hidden"   name = "${param.flagname}" value=${param.flagvalue}> <% if ( "T" .equals(searchFlag)) { %> 输入查询关键字： < input type = "text" name = "kw"   value = "<%=keyWord.equals("null") ? "" : keyWord%>"> <input   type = "submit" value = " 查询 " > < br > < br > <% if ( allRecorders > 0) { %> < input type = "button" value = " 首页 " onClick = "openPage(1)"   <%= currentPage == 1 ? "disabled" : "" %> > < input type = "button"   value = " 上一页 " onClick = "openPage(<%=currentPage - 1%>)"   <%= currentPage == 1 ? "disabled" : "" %> > < input type = "button"   value = " 下一页 " onClick = "openPage(<%=currentPage + 1%>)"   <%= currentPage == pageSize ? "disabled" : "" %> > < input type = "button"   value = " 尾页 " onClick = "openPage(<%=pageSize%>)"   <%= currentPage == pageSize ? "disabled" : "" %> > < input type = "hidden"   name = "cp" value = "" > < font color = "red" size = "5" > <%= currentPage %> </ font > / < font color = "red" size = "5" > <%= pageSize %> </ font > 跳转到 < select   name = "selpage" onChange = "selOpenPage()" >   <%   for ( int x = 1; x <= pageSize; x++) {   %>   < option value = "<%=x%>" <%=currentPage == x ? "selected" : ""%>><%=x%></option>   <%   }   %> </ select > 页 <% } %> Spring Junit4测试

public class UserDAOTest extends AbstractDependencyInjectionSpringContextTests { @Override复写父类的方法，找到配制文件 protected String[] getConfigLocations() { // TODO Auto-generated method stub return new String[]{"classpath:applicationContext.xml"}; } //引入在Spring注入的bean private UserDAO userdao; public void setUserdao(UserDAO userdao) { this.userdao = userdao; } public void testLoadUser() throws Exception{ // User user=this.userdao.queryByUserid("fantlam"); // assertNotNull(user); boolean b=this.userdao.isExists("fantlam", "你在吗", "我在"); assertEquals(true,b); } //可以直接运行程序 public static void main(String[] args){ // junit.swingui.TestRunner.run(UserDAOTest.class);因为conmon-logging的原因，使用junit.awtui或junit.swingui包下的TestRunner会出现错误/ 故采用junit.textui包 junit.textui.TestRunner.run(UserDAOTest.class); } }

 

 

applicationContext.xml

  < bean id = "userdao" class = "dj.fantlam.myssh.dao.UserDAO"

    abstract = "true" >

  </ bean >

< bean id = "userdaoimpl" class = "dj.fantlam.myssh.daoimpl.UserDAOImpl"

    parent = "userdao" >

    < property name = "sessionFactory" >

      < ref bean = " sessionFactory " />

    </ property >

  </ bean >

关于spring junit测试的类关系

org.springframework.test

Class AbstractTransactionalDataSourceSpringContextTests

java.lang.Object

junit.framework.Assert

    junit.framework.TestCase

      org.springframework.test.ConditionalTestCase

        org.springframework.test.AbstractSpringContextTests

            org.springframework.test.AbstractSingleSpringContextTests

              org.springframework.test.AbstractDependencyInjectionSpringContextTests

                org.springframework.test.AbstractTransactionalSpringContextTests

                    org.springframework.test.AbstractTransactionalDataSourceSpringContextTests

All Implemented Interfaces:

Test

org.hibernate.QueryException: could not resolve property: qid of: dj.fantlam.myssh.vo.Answer [SELECT COUNT(q.qid) FROM dj.fantlam.myssh.vo.Question AS q WHERE q.qid IN (SELECT a.qid FROM dj.fantlam.myssh.vo.Answer AS a WHERE a.userid=?)]

解决方法：

在 answer.hbm.xml 添加属性

    </property>

          <property name="qid" type="java.lang.Integer">

        <column name="qid" />

    </property>

加入

< many-to-one name = "question"

    class = "dj.fantlam.myssh.vo.Question" fetch = "select"

    insert="false" update="false" >

    < column name = "qid" />

    </ many-to-one >

这样做了之后的确可以解决问题，但破坏了表的关联属性，导致无法进行其它插入等操作，所以这种方法不行。

根据表的一对多的关系，把整个 HQL 语句改成

  String hql = "SELECT COUNT(q.qid) FROM Question AS q WHERE q.qid IN (SELECT a.question.qid FROM Answer AS a WHERE a.userid=? AND status=?)" ;

然后把之前改过的东西还原回来（把红色的都去掉） 这样就没问题了