Struts完成客户列表显示 所用的基础知识 在之前的随笔中已经讲过。这篇是介绍如何使用Struts 完成客户列表显示 。
下面是 完成的代码执行逻辑图：
抽取项目部分代码 相信大家认真看一遍就明白的：
jsp 页面代码片段：
<TABLE cellSpacing=0 cellPadding=3 width=165 align=center border=0>
<TBODY>
<TR>
<TD class=mainMenu onClick="MenuDisplay('table_1');"><SPAN
class=span id=table_1Span>＋</SPAN> 客户管理</TD>
</TR>
<TR>
<TD>
<TABLE id=table_1 style="DISPLAY: none" cellSpacing=0
cellPadding=2 width=155 align=center border=0>
<TBODY>
<TR>
<TD class=menuSmall><A class=style2 href="${pageContext.request.contextPath}/jsp/customer/add.jsp"
target=main>－ 新增客户</A></TD>
</TR>
<TR>
<TD class=menuSmall><A class=style2 href="${pageContext.request.contextPath}/CustomerAction_list"
target=main>－ 客户列表</A></TD>
</TR> </TBODY>
</TABLE>
</TD>
</TR>
<TR>
<TD background=images/new_027.jpg height=1></TD>
</TR>
<TR>
<TD class=mainMenu onClick="MenuDisplay('table_2');"><SPAN
class=span id=table_2Span>＋</SPAN> 联系人管理</TD>
</TR>
<TR>
<TD>
<TABLE id=table_2 style="DISPLAY: none" cellSpacing=0
cellPadding=2 width=155 align=center border=0>
<TBODY>
<TR>
<TD class=menuSmall><A class=style2 href="${pageContext.request.contextPath}/jsp/linkman/add.jsp"
target=main>－ 新增联系人</A></TD>
</TR>
<TR>
<TD class=menuSmall><A class=style2 href="linkmanServlet?method=list"
target=main>－联系人列表</A></TD>
</TR> </TBODY>
</TABLE>
</TD>
</TR>
<TR>
<TD background=images/new_027.jpg height=1></TD>
</TR>
<TR>
<TD class=mainMenu onClick="MenuDisplay('table_5');"><SPAN
class=span id=table_5Span>＋</SPAN> 客户拜访管理</TD>
</TR>
<TR>
<TD>
<TABLE id=table_5 style="DISPLAY: none" cellSpacing=0
cellPadding=2 width=155 align=center border=0>
<TBODY>
<TR>
<TD class=menuSmall><A class=style2 href="#"
target=main>－新增客户拜访</A></TD>
</TR>
<TR>
<TD class=menuSmall><A class=style2 href="#"
target=main>－客户拜访列表</A></TD>
</TR> </TBODY>
</TABLE>
</TD>
</TR>
<TR>
<TD background=images/new_027.jpg height=1></TD>
</TR>
<TR>
<TD class=mainMenu onClick="MenuDisplay('table_3');"><SPAN
class=span id=table_3Span>＋</SPAN> 综合查询</TD>
</TR>
<TR>
<TD>
<TABLE id=table_3 style="DISPLAY: none" cellSpacing=0
cellPadding=2 width=155 align=center border=0>
<TBODY>
<TR>
<TD class=menuSmall><A class=style2 href="#"
target=main>－ 客户信息查询</A></TD>
</TR>
<TR>
<TD class=menuSmall><A class=style2 href="#"
target=main>－ 联系人信息查询</A></TD>
</TR>
<TR>
<TD class=menuSmall><A class=style2 href="#"
target=main>－ 客户拜访记录查询</A></TD>
</TR>
</TBODY>
</TABLE>
</TD>
</TR>
<TR>
<TD background=images/new_027.jpg height=1></TD>
</TR>
<TR>
<TD class=mainMenu onClick="MenuDisplay('table_4');"><SPAN
class=span id=table_4Span>＋</SPAN> 统计分析</TD>
</TR>
<TR>
<TD>
<TABLE id=table_4 style="DISPLAY: none" cellSpacing=0
cellPadding=2 width=155 align=center border=0>
<TBODY>
<TR>
<TD class=menuSmall><A class=style2 href="#"
target=main>－客户行业统计</A></TD>
</TR>
<TR>
<TD class=menuSmall><A class=style2 href="#"
target=main>－客户来源统计</A></TD>
</TR> </TBODY>
</TABLE>
</TD>
</TR>
<TR>
<TD background=images/new_027.jpg height=1></TD>
</TR>
<TR>
<TD class=mainMenu onClick="MenuDisplay('table_6');"><SPAN
class=span id=table_6Span>＋</SPAN>系统管理</TD>
</TR>
<TR>
<TD>
<TABLE id=table_6 style="DISPLAY: none" cellSpacing=0
cellPadding=2 width=155 align=center border=0>
<TBODY>
<TR>
<TD class=menuSmall><A class=style2 href="#"
target=main>－角色管理</A></TD>
</TR>
<TR>
<TD class=menuSmall><A class=style2 href="#"
target=main>－用户管理</A></TD>
</TR>
<TR>
<TD class=menuSmall><A class=style2 href="#"
target=main>－数据字典</A></TD>
</TR>
</TBODY>
</TABLE>
</TD>
</TR>
</TBODY>
</TABLE>
Action类 代码：
public class CustomerAction extends ActionSupport {
private CustomerService cs = new CustomerServiceImpl();
public String list() throws Exception {
//1 接受参数
String cust_name = ServletActionContext.getRequest().getParameter("cust_name");
//2 创建离线查询对象
DetachedCriteria dc =DetachedCriteria.forClass(Customer.class);
//3 判断参数拼装条件
//StringUtils.isNotBlank 静态方法 判断
//当cust_name 不为null 不为 ""（空字符串） ,不为空格时 返回true
if(StringUtils.isNotBlank(cust_name)){
dc.add(Restrictions.like("cust_name", "%"+cust_name+"%"));
}
//4 调用Service将离线对象传递
List<Customer> list = cs.getAll(dc);
//5 将返回的list放入request域.转发到list.jsp显示
//引用ServletActionContext类的静态方法getRequest
//getRequest返回HttpServletRequest对象
ServletActionContext.getRequest().setAttribute("list", list);
return "list";
}
}
Struts.xml ：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<!-- 指定struts2是否以开发模式运行
1.热加载主配置.(不需要重启即可生效)
2.提供更多错误信息输出,方便开发时的调试
-->
<constant name="struts.devMode" value="true"></constant>
<package name="crm" namespace="/" extends="struts-default" >
<action name="CustomerAction_*" class="cn.itheima.web.action.CustomerAction" method="{1}" >
<result name="list" >/jsp/customer/list.jsp</result>
</action>
</package>
</struts>
ServiceImpl 类
import java.util.List; import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.criterion.DetachedCriteria; import cn.itheima.dao.CustomerDao;
import cn.itheima.dao.impl.CustomerDaoImpl;
import cn.itheima.domain.Customer;
import cn.itheima.service.CustomerService;
import cn.itheima.utils.HibernateUtils; public class CustomerServiceImpl implements CustomerService { private CustomerDao customerDao = new CustomerDaoImpl(); public List<Customer> getAll() {
Session session = HibernateUtils.getCurrentSession();
//打开事务
Transaction tx = session.beginTransaction(); List<Customer> list = customerDao.getAll(); //关闭事务
tx.commit();
return list;
} public List<Customer> getAll(DetachedCriteria dc) {
Session session = HibernateUtils.getCurrentSession();
//打开事务
Transaction tx = session.beginTransaction(); List<Customer> list = customerDao.getAll(dc); //关闭事务
tx.commit();
return list;
} }
dao层实现类：
import java.util.List; import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.criterion.DetachedCriteria; import cn.itheima.dao.CustomerDao;
import cn.itheima.domain.Customer;
import cn.itheima.utils.HibernateUtils; public class CustomerDaoImpl implements CustomerDao {
public List<Customer> getAll() {
//1 获得session
Session session = HibernateUtils.getCurrentSession();
//2 创建Criteria对象
Criteria c = session.createCriteria(Customer.class);
return c.list();
}
}