尚硅谷 ssh 框架整合

一、加入 Spring
1、加入 jar 包（这个就不废话了）

2、配置 web.xml 文件

主要是配置ContextLoaderListener（快捷键art+/有提示，以免菜鸟手工出错）

<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext*.xml</param-value>
</context-param>

<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

3、加入 Spring 的配置文件.

applicationContext.xml（暂时空着）

二、加入 Hibernate
1、同时建立持久化类, 和其对应的 .hbm.xml 文件, 生成对应的数据表

Department.java

package com.tian.ssh.entity;
public class Department {
private Integer id;
private String departmentName;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getDepartmentName() {
return departmentName;
}
public void setDepartmentName(String departmentName) {
this.departmentName = departmentName;
}
}

Employee.java

package com.tian.ssh.entity;
import java.util.Date;
public class Employee {
private Integer id;
private String lastName;
private String email;
private Date birth;
private Date createTime;
private Department department;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public Date getBirth() {
return birth;
}
public void setBirth(Date birth) {
this.birth = birth;
}
public Date getCreateTime() {
return createTime;
}
public void setCreateTime(Date createTime) {
this.createTime = createTime;
}
public Department getDepartment() {
return department;
}
public void setDepartment(Department department) {
this.department = department;
}
}

Department.hbm.xml

<?xml version="1.0"?>
<!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.tian.ssh.entity.Department" table="SSH_DEPARTMENT">
<id name="id" type="java.lang.Integer">
<column name="ID" />
<generator class="native" />
</id>
<property name="departmentName" type="java.lang.String">
<column name="DEPARTMENT_NAME" />
</property>
</class>
</hibernate-mapping>

Employee.hbm.xml

<?xml version="1.0"?>
<!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.tian.ssh.entity.Employee" table="SSH_EMPLOYEE">
<id name="id" type="java.lang.Integer">
<column name="ID" />
<generator class="native" />
</id>
<property name="lastName" type="java.lang.String">
<column name="LAST_NAME" />
</property>
<property name="email" type="java.lang.String">
<column name="EMAIL" />
</property>
<property name="birth" type="java.util.Date">
<column name="BIRTH" />
</property>
<property name="createTime" type="java.util.Date">
<column name="CREATE_TIME" />
</property>
<many-to-one name="department" class="com.tian.ssh.entity.Department" >
<column name="DEPARTMENT_ID" />
</many-to-one>
</class>
</hibernate-mapping>

2、 Spring 整合 Hibernate
3、步骤:
①. 加入 jar 包（把解压后的lib/requied加入，lib/optional/c3p0中的c3p0-0.9.2.1.jar，mchange-commons-java-0.2.3.4.jar加入）
②. 在类路径下加入 hibernate.cfg.xml 文件, 在其中配置 hibernate 的基本属性

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>


<property name="hibernate.dialect">org.hibernate.dialect.MySQL57InnoDBDialect</property>

<property name="hibernate.show_sql">true</property>
<property name="hibernate.format_sql">true</property>

<property name="hibernate.hbm2ddl.auto">update</property>


<property name="hibernate.current_session_context_class">thread</property>
</session-factory>
</hibernate-configuration>

注意：各个版本方言版本可能不一样，crtl +alt+T快捷键查下
<property name="hibernate.dialect">org.hibernate.dialect.MySQL57InnoDBDialect</property>

③. 建立持久化类, 和其对应的 .hbm.xml 文件

如上面所示，已建好。
④. 和 Spring 进行整合
i. 加入 c3p0 和 MySQL 的驱动
ii. 在 Spring 的配置文件中配置: 数据源, SessionFactory, 声明式事务

我就把整合好后的applicationContext.xml贴出来：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd">

<context:property-placeholder location="classpath:db.properties"/>

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="user" value="${jdbc.user}"></property>
<property name="password" value="${jdbc.password}"></property>
<property name="driverClass" value="${jdbc.driverClass}"></property>
<property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
<property name="initialPoolSize" value="${jdbc.initPoolSize}"></property>
<property name="maxPoolSize" value="${jdbc.maxPoolSize}"></property>
</bean>

<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
<property name="mappingLocations" value="classpath:com/tian/ssh/entity/*.hbm.xml"></property>
</bean>

</beans>

db.properties文件如下：

jdbc.user=root
jdbc.password=123
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.jdbcUrl=jdbc:mysql:///ssh2
jdbc.initPoolSize=5
jdbc.maxPoolSize=10

⑤. 启动项目, 会看到生成对应的数据表（在数据库hibernate会自动帮我们生成）

三、加入 Struts2
1、加入 jar 包: 若有重复的 jar 包, 则需要删除版本较低的. javassist-3.11.0.GA.jar（这个选择app里面的blank，不需要lib下的）
2、在 web.xml 文件中配置 Struts2 的 Filter

<?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">

<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext*.xml</param-value>
</context-param>

<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter>
<filter-name>SpringOpenSessionInViewFilter</filter-name>
<filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>SpringOpenSessionInViewFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

3、加入 Struts2 的配置文件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>
<constant name="struts.enable.DynamicMethodInvocation" value="false" />
<constant name="struts.devMode" value="true" />
<package name="default" namespace="/" extends="struts-default">
<action name="emp-*" class="employeeAction"
method="{1}">
<result name="list">/WEB-INF/views/emp-list.jsp</result>
</action>
</package>
</struts>

4、整合 Spring
①. 加入 Struts2 的 Spring 插件的 jar 包（在lib下）

②. 在 Spring 的配置文件中正常配置 Action, 注意 Action 的 scope 为 prototype

③. 在 Struts2 的配置文件中配置 Action 时, class 属性指向该 Action 在 IOC 中的 id

struts的bean文件：applicationContext-beans.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="employeeDao" class="com.tian.ssh.dao.EmployeeDao">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<bean id="employeeService" class="com.tian.ssh.service.EmployeeService">
<property name="employeeDao" ref="employeeDao"></property>
</bean>
<bean id="employeeAction" class="com.tian.ssh.actions.EmployeeAction"
scope="prototype">
<property name="employeeService" ref="employeeService"></property>
</bean>
</beans>

四、补充。

如走来结构图所示的，其他几个类和页面的显示：

EmployeeAction.java

package com.tian.ssh.actions;
import java.util.Map;
import org.apache.struts2.interceptor.RequestAware;
import com.opensymphony.xwork2.ActionSupport;
import com.tian.ssh.service.EmployeeService;
public class EmployeeAction extends ActionSupport implements RequestAware {
private EmployeeService employeeService;
public void setEmployeeService(EmployeeService employeeService) {
this.employeeService = employeeService;
}
public String list(){
request.put("employees", employeeService.getAll());
return "list";
}
private Map<String, Object> request;
@Override
public void setRequest(Map<String, Object> arg0) {
// TODO Auto-generated method stub
this.request = arg0;
}
}

EmployeeDao.java

package com.tian.ssh.dao;
import java.util.List;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import com.tian.ssh.entity.Employee;
public class EmployeeDao {
private SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
public Session getSession() {
return this.sessionFactory.getCurrentSession();
}
public List<Employee> getAll() {
String hql = "FROM Employee e LEFT OUTER JOIN FETCH e.department";
List<Employee> list1 = null;
try {
Transaction transaction = null;
transaction = getSession().beginTransaction();
list1 = getSession().createQuery(hql).list();
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return list1;
}
}

EmployeeService.java

package com.tian.ssh.service;
import java.util.List;
import com.tian.ssh.dao.EmployeeDao;
import com.tian.ssh.entity.Employee;
public class EmployeeService {
private EmployeeDao employeeDao;
public void setEmployeeDao(EmployeeDao employeeDao) {
this.employeeDao = employeeDao;
}
public List<Employee> getAll(){
return employeeDao.getAll();
}
}

emp-list.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<h4>Employee list page</h4>
<s:if test="#request.employees == null || #request.employees.size() == 0">
没有任何员工信息！
</s:if>
<s:else>
<table border="1" cellpadding="10" cellspacing="0">
<tr>
<td>ID</td>
<td>LASTNAME</td>
<td>EMAIL</td>
<td>BIRTH</td>
<td>CREATETIME</td>
<td>DEPARTMENT</td>
</tr>
<s:iterator value="#request.employees">
<tr>
<td>${id }</td>
<td>${lastName }</td>
<td>${email }</td>
<td>${birth }</td>
<td>${createTime }</td>
<td>${department.departmentName }</td>
</tr>
</s:iterator>
</table>
</s:else>
</body>
</html>

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<a href="emp-list"></a>
</body>
</html>

最最后，要补充的是，这个东西折磨我很久了，会一直提示“Could not obtain transaction-synchronized Session for current thread“在hibernate.cfg.xml中添加

<property name="hibernate.current_session_context_class">thread</property>，这样你以为好了吗结果又提示你：

“createQuery is not valid without active transaction”，好这是你一改知道了，是没有激活事务，在你的基础数据操作功能中加上这：

Transaction transaction = null;
transaction = getSession().beginTransaction();

本例子中就是在EmployeeDao.java的getAll（）方法中添加即可。

最后我们来看下我耗时很长调处来的结果：

尚硅谷 ssh 框架整合

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