TestCustomer.java
import java.util.List;
import org.hibernate.Session;
import repairsystem.entity.Customer;
import repairsystem.factory.HibernateSessionFactory;
public class TestCustomer{
public static void main(String[] args) {
Session session = HibernateSessionFactory.getSession();
List<Customer> customer = session.createQuery("From Customer").list();
for(Customer c:customer){
System.out.println(c.getCid()+"\t"+c.getCname()+"\t"+c.getCpassword()+"\t"+c.getCphone()+"\t"+c.getCimg());
}
}
}
JSP
- html
- js
- css
- jsp指令 <%@
- page 页面设置 字符集 contentType 当前页面输出的字符集
pageEnding 当前页面编写的字符编码集
引入java类 - include 引入其他页面的内容(静态引入:之引入另外页面的结果,可以有重复
变量) - taglib
%>
- jsp动作<jsp:> include 引入其他页面的内容(动态引入,联合变异,不可以有
重复变量)
forward:
<jsp:forward page="list2.jsp"></jsp:forward>
等价于
<%
request.getRequestDispatcher("list2.jsp").forward(request,response);
%>
- scriptlet <% %> java代码
- jsp注释 隐式 <%-- --%>
显式 - 内置对象
变量四个生命周期从小到大:
page 不离开当前页
request 页面地址不变化
session 不换浏览器
application 服务器不重启
response 和用户交互对象
out 往页面输出对象
pageContext
error
exception
Struts2
- xwork框架
- freemarker框架:各种UI(单选按钮,下拉列表,文本框),bean标签的组合。
- 框架搭建
- 拷贝jar
- 拷贝web.xml
- 拷贝struts.xml将package包中的action指向自己的类(继承actionSupport)
allowed-methods
- 在action中的类编写各种符合struts规范的方法(1 返回值为string;2 没有
参数;3 抛出异常;) - 页面引入struts标签。
<%@taglib prefix="s" uri="/struts-tags" %>
- <s:action name="teacherAction_getAllTeacher" executeResult="false" namespace="/"/>
name中前半部分和struts-xx.xml中name一致,后半部分和action类的方法一致。
Struts查错
- 找到服务器的work和wtp
workspace\.metadata\.plugins\org.eclipse.wst.server.core\temp0
- 放开方法 struts.xml中
<allowed-methods>getAllTeacher</allowed-methods>
- namespace对应(struts.xml&jsp)
Example
TeacherAction.java
package gxa.action;
import java.io.PrintWriter;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
import gxa.entity.Teacher;
public class TeacherAction extends ActionSupport{
//struts类中的方法必须符合以下要求,1 返回值为Sting 2不能有参数 3抛出异常
private Teacher teacher;
public Teacher getTeacher() {
return teacher;
}
public void setTeacher(Teacher teacher) {
this.teacher = teacher;
}
//查询全部教师
public String getAllTeacher() throws Exception{
PrintWriter out = ServletActionContext.getResponse().getWriter();
out.println("getAllTeacher");
System.out.println("getAllTeacher");
return null;
}
//增加一个教师
public String addTeacher(){
System.out.println("add");
return null;
}
}
struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
"http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
<include file="struts-teacher.xml"/>
<!-- struts把url请求分模块处理,name随意,extends继承默认包 -->
<package name="struts2" extends="struts-default" namespace="/">
</package>
</struts>
struts-teacher.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
"http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
<!-- struts把url请求分模块处理,name随意,extends继承默认包 -->
<package name="struts2" extends="struts-default" namespace="/">
<action name="teacherAction_*" class="gxa.action.TeacherAction" method="{1}">
<allowed-methods>getAllTeacher,addTeacher</allowed-methods>
</action>
</package>
</struts>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>Archetype Created Web Application</display-name>
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
</web-app>
list.jsp
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Insert title here</title>
</head>
<body>
<s:action name="teacherAction_getAllTeacher" executeResult="false" namespace="/"/>
</body>
</html>
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