SSH（七）新的開始
阿新 • • 發佈：2017-06-30
w3c pass nat temp 以及 class des 登錄頁面 -m
在完成了ssh框架搭建的基礎上，我嘗試著去了解更多。新一階段還是一些簡單的增刪改查，只是提高自己的熟練度。
這一片我要創建一個登錄頁面，並查詢數據庫完成登錄。
一、創建實體：
1、1新建職員實體employee：
package com.ssh.entity;
import java.util.Date;
public class Employee {
private int employee_id;
private String username;
private String password;
private String sex;
private String positioin;
private int phone;
private Date birthday;
//所屬部門
private Department department;
public int getEmployee_id() {
return employee_id;
}
public void setEmployee_id(int employeeId) {
employee_id = employeeId;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getPositioin() {
return positioin;
}
public void setPositioin(String positioin) {
this.positioin = positioin;
}
public int getPhone() {
return phone;
}
public void setPhone(int phone) {
this.phone = phone;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public Department getDepartment() {
return department;
}
public void setDepartment(Department department) {
this.department = department;
}
}
1、2創建部門實體department：
package com.ssh.entity;
import java.util.HashSet;
import java.util.Set;
public class Department {
private int department_id;
private String department_name;
private String department_parent_id;
//部門員工集合（hibernate有單向關聯，這裏用雙向關聯）
private Set<Employee> employees = new HashSet<Employee>();
public int getDepartment_id() {
return department_id;
}
public void setDepartment_id(int departmentId) {
department_id = departmentId;
}
public String getDepartment_name() {
return department_name;
}
public void setDepartment_name(String departmentName) {
department_name = departmentName;
}
public String getDepartment_parent_id() {
return department_parent_id;
}
public void setDepartment_parent_id(String departmentParentId) {
department_parent_id = departmentParentId;
}
public Set<Employee> getEmployees() {
return employees;
}
public void setEmployees(Set<Employee> employees) {
this.employees = employees;
}
}
二、實體映射文件：
2、1employee的映射文件employee.hbm.xml:
（註意職員表和部門表的對應關系多對一）
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.ssh.entity.Employee" table="employee">
<id name="employee_id" column="employee_id">
<generator class="native"></generator>
</id>
<property name="username" column="username" length="20"></property>
<property name="password" column="password" length="20"></property>
<property name="sex" column="sex" length="2"></property>
<property name="positioin" column="positioin" length="20"></property>
<property name="phone" column="phone" length="20"></property>
<property name="birthday" column="birthday" ></property>
<!-- 配置關聯關系，員工對部門是多對一，這裏生成的也是數據庫表的外鍵。 -->
<many-to-one name="department" class="com.ssh.entity.Department" column="depart_id"/>
</class>
</hibernate-mapping>
2、2department實體映射文件：department.hmb.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.ssh.entity.Department" table="department">
<id name ="department_id" column="department_id">
<generator class="native"></generator>
</id>
<property name="department_name" column="department_name" length="20"></property>
<property name="department_parent_id" column="department_parent_id" length="50"></property>
<!-- 配置關聯關系 -->
<set name="employees">
<key column="depart_id"></key>
<one-to-many class="com.ssh.entity.Employee"/>
</set>
</class>
</hibernate-mapping>
3、3在applicationcontext.xml→sessionFactory→mappingResources引入hibernate映射文件：
<property name="mappingResources">
<list>
<!-- 映射文件全路徑 -->
<value>com/ssh/entity/product.hbm.xml</value>
<value>com/ssh/entity/Department.hbm.xml</value>
<value>com/ssh/entity/Employee.hbm.xml</value>
</list>
</property>
運行項目，讓ssh為你在數據庫去創建你要的employee、department表。
三、新建登錄頁面
就在index.xml基礎上修改吧。
這裏有一個struts2的標簽可以學習下：<h1><s:actionerror/></h1>他可以將後臺的錯誤提示信息自動顯示。
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!-- struts2 標簽庫 -->
<[email protected] uri ="/struts-tags" prefix="s" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>登錄頁面</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<div align="center">
<h1><s:actionerror/></h1>
<h1>歡迎</h1>
<s:form action="door_login" method="post" namespace="/" theme="simple">
<table border="1" width="400">
<tr>
<td>用戶名：</td>
<td><s:textfield name="username"/></td>
</tr>
<tr>
<td>密 碼：</td>
<td><s:textfield name="password"/></td>
</tr>
<tr>
<!-- colspan: 合並單元格-->
<td align="center" colspan="2"><input type="submit" value="登錄"> </td>
</tr>
</table>
</s:form>
</div>
</body>
</html>
四、控制層、業務層、持久層登錄方法的實現：
employeeAction：使用模型驅動ModelDriven接收前端數據
這裏面有一個addActionError的方法，就是將錯誤提示信息返回給前端頁面。
package com.ssh.action;
import java.util.Date;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.ssh.entity.Employee;
import com.ssh.service.employeeService;
public class employeeAction extends ActionSupport implements ModelDriven<Employee> {
private Employee employee = new Employee();
//使用模型驅動接收前段頁面數據，並將獲取數據封裝到employee對象。
public Employee getModel() {
// TODO Auto-generated method stub
return employee;
}
//註入業務層類
private employeeService employeeService;
public void setEmployeeService(employeeService employeeService) {
this.employeeService = employeeService;
}
public String login(){
Employee existEmployee = employeeService.login(employee);
Date date = new Date();
if (existEmployee != null) {
System.out.println("acction"+existEmployee);
//登陸成功，提示登錄成功！把登錄信息存入session
this.addActionMessage(existEmployee.getUsername()+"登錄成功！"+"\t"+date);
ActionContext.getContext().getSession().put("existEmployee", employee);
return SUCCESS;
}else {
//登錄失敗，提示錯誤信息，返回登錄界面。
this.addActionError("用戶名或密碼錯誤！");
return INPUT;
}
//return NONE;
}
}
employeeService：
public interface employeeService {
Employee login(Employee employee);
}
實現類employeeServiceImpl：
public class employeeServiceImpl implements employeeService {
private employeeDao employeeDao;
//註入dao
public void setEmployeeDao(employeeDao employeeDao) {
this.employeeDao = employeeDao;
}
public Employee login(Employee employee) {
Employee existEmployee = employeeDao.findUsernameAndPassword(employee);
return existEmployee;
}
}
employeeDao：
public interface employeeDao {
Employee findUsernameAndPassword(Employee employee);
}
實現類employeeDaoImpl：註意繼承hibernate模板
public class employeeDaoImpl extends HibernateDaoSupport implements employeeDao {
public Employee findUsernameAndPassword(Employee employee) {
String hql ="from Employee where username = ? and password = ?";
List<Employee> list =this.getHibernateTemplate().find(hql, employee.getUsername(),employee.getPassword());
if (!list.isEmpty()) {
System.out.println("dao:"+list.get(0));
return list.get(0);
}
return null;
}
}
五、配置applicationcontext.xml以及struts.xml：
5、1控制層、業務層、持久層的註入配置：
<bean id="employeeAction" class="com.ssh.action.employeeAction" scope="prototype">
<!-- 需要手動註入service -->
<property name="employeeService" ref="employeeService"></property>
</bean>
<!-- 配置業務層的類 -->
<bean id="employeeService" class="com.ssh.service.impl.employeeServiceImpl">
<property name="employeeDao" ref="employeeDao"></property>
</bean>
<!-- 配置dao層：註入hibernate模板 -->
<bean id="employeeDao" class="com.ssh.dao.impl.employeeDaoImpl">
<!-- ref 值與sessionFactory bean id保持一致 -->
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
5.2struts.xml的action配置：
註意這裏配置的兩個返回結果標簽result，成功的跳轉addproduct。jsp，失敗的返回登錄頁。
<?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>
<constant name="struts.enable.DynamicMethodInvocation" value="false" />
<constant name="struts.devMode" value="false" />
<package name="default" namespace="/" extends="struts-default">
<action name="door_*" class="employeeAction" method="{1}">
<result name="success">/addproduct.jsp</result>
<result name="input">/index.jsp</result>
</action>
</package>
</struts>
六、運行項目
成功跳轉：
SSH（七）新的開始