JAVA

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&qu
ot;, 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");

  }









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< /font>-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> <%
}
%>

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.awtuijunit.swingui包下的TestRunner会出现错误/
故采用junit.textui
    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:
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
(0)

本文由 Linux视野 作者:fantlam 发表,转载请注明来源!

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