目录:
SSH的整合:
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>dynamicDBsource</display-name> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <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> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext*.xml</param-value> </context-param> </web-app>
struts.xml <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts> <constant name="struts.enable.DynamicMethodInvocation" value="true" /> <constant name="struts.devMode" value="true" /> <package name="default" namespace="/" extends="struts-default"> <action name="student_*" class="com.xh.dataSource.action.StuAction" method="{1}"> <result name="addUI">/WEB-INF/view/addUI.jsp</result> <result name="list">/WEB-INF/view/list.jsp</result> <result name="add">/WEB-INF/view/list.jsp</result> <result name="#">index.jsp</result> </action> </package> </struts>
applicatonContext.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" 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-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"> <!--自动扫描和装配 --> <context:component-scan base-package="com.xh.dataSource"></context:component-scan> <!-- 导入外部的properties文件 --> <context:property-placeholder location="classpath:jdbc.properties"/> <!-- 配置sessionFactory --> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <!-- 指定hibernate的配置文件位置 --> <property name="configLocation" value="classpath:hibernate.cfg.xml"></property> <!-- c3p0数据库连接信息 --> <property name="dataSource" ref="MYdataSource"></property> </bean> <bean id="MYdataSource" class="com.xh.dataSource.ds.MyDataSource"> <property name="targetDataSources"> <map key-type="java.lang.String"> <entry key="dataSource0" value-ref="dataSource0"/> <entry key="dataSource1" value-ref="dataSource1"/> </map> </property> <property name="defaultTargetDataSource" ref="dataSource1"/> </bean> <bean id="dataSource0" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="jdbcUrl" value="jdbc:mysql:///db0"></property> <property name="driverClass" value="com.jdbc.mysql.Driver"></property> <property name="user" value="root"></property> <property name="password" value="root"></property> </bean> <bean id="dataSource1" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="jdbcUrl" value="jdbc:mysql:///db1"></property> <property name="driverClass" value="com.jdbc.mysql.Driver"></property> <property name="user" value="root"></property> <property name="password" value="root"></property> </bean> <!-- 配置声明式事务管理(采用注解的方式) --> <bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"></property> </bean> <tx:annotation-driven transaction-manager="txManager"/> </beans>
hibernate.xml
<?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> <!-- 1,数据库连接信息 --> <property name="dialect"> org.hibernate.dialect.MySQL5InnoDBDialect </property> <!-- 2,其他配置 --> <property name="show_sql">true</property> <property name="hbm2ddl.auto">update</property> <!-- 3,导入映射文件 --> <mapping resource="com/xh/dataSource/entity/Student.hbm.xml" /> </session-factory> </hibernate-configuration>
action
package com.xh.dataSource.action; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.annotation.Resource; import org.apache.struts2.interceptor.RequestAware; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; import com.opensymphony.xwork2.ModelDriven; import com.xh.dataSource.ds.DataSourceContextHolder; import com.xh.dataSource.ds.MyDataSource; import com.xh.dataSource.entity.Student; import com.xh.dataSource.service.StuService; public class StuAction extends ActionSupport implements ModelDriven<Student> ,RequestAware{ /** * */ private static final long serialVersionUID = 1L; @Resource StuService stuService; Map<String, Object> request=new HashMap<>(); List<Student> stus; public List<Student> getStus() { return stus; } public void setStus(List<Student> stus) { this.stus = stus; } @Resource Student stu; public String list() { stus=stuService.lsit(); System.out.println("stus:>>"+stus.size()); ActionContext.getContext().put("stusList", stus); return "list"; } public String add() { System.out.println("ID>>>"+stu.getId()+"NAME>>>"+stu.getName()); stuService.add(stu); return "add"; } public String addUI() { return "addUI"; } public String dataSource0() { DataSourceContextHolder.setDataSourceType("dataSource0"); return "#"; } public String dataSource1() { DataSourceContextHolder.setDataSourceType("dataSource1"); return "#"; } @Override public Student getModel() { // TODO Auto-generated method stub stu=new Student(); return stu; } @Override public void setRequest(Map<String, Object> arg0) { // TODO Auto-generated method stub request=arg0; } }
service
package com.xh.dataSource.service; import java.util.List; import javax.annotation.Resource; import org.springframework.stereotype.Component; import com.xh.dataSource.dao.StuDao; import com.xh.dataSource.entity.Student; @Component public class StuService { @Resource StuDao stuDao; public List<Student> lsit() { return stuDao.list(); } public void add(Student stu) { System.out.println("service---ID>>>"+stu.getId()+"NAME>>>"+stu.getName()); stuDao.add(stu); } }
dao
package com.xh.dataSource.dao; import java.util.ArrayList; import java.util.List; import javax.annotation.Resource; import org.hibernate.SessionFactory; import org.springframework.stereotype.Component; import org.springframework.transaction.annotation.Transactional; import com.xh.dataSource.entity.Student; @Component public class StuDao { @Resource SessionFactory sessionFactory; @SuppressWarnings("unchecked") public List<Student> list() { List<Student> stus=new ArrayList<>(); stus=sessionFactory.openSession().createQuery("FROM Student").list(); return stus; } @Transactional public void add(Student stu) { System.out.println("dao----ID>>>"+stu.getId()+"NAME>>>"+stu.getName()); sessionFactory.openSession().save(stu); } }
entity
package com.xh.dataSource.entity; import org.springframework.stereotype.Component; @Component public class Student { private Long id; private String name; public String getName() { return name; } public void setName(String name) { this.name = name; } public Long getId() { return id; } public void setId(Long id) { this.id = id; } }
*.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"> <!-- Generated 2016-2-3 9:36:30 by Hibernate Tools 3.4.0.CR1 --> <hibernate-mapping> <class name="com.xh.dataSource.entity.Student" table="STUDENT"> <id name="id" > <column name="ID" default="1" /> <generator class="native" /> </id> <property name="name" type="java.lang.String"> <column name="NAME" /> </property> </class> </hibernate-mapping>
数据源切换相关
ds:
package com.xh.dataSource.ds; public class DataSourceContextHolder { @SuppressWarnings("rawtypes") private static final ThreadLocal contextHolder=new ThreadLocal(); @SuppressWarnings("unchecked") public static void setDataSourceType(String dataSourceName){ contextHolder.set(dataSourceName); } public static String getDataSourceName(){ return (String) contextHolder.get(); } public static void clearDataSourceType(){ contextHolder.remove(); } }
package com.xh.dataSource.ds; import java.sql.SQLFeatureNotSupportedException; import java.util.Map; import java.util.logging.Logger; import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource; import org.springframework.jdbc.datasource.lookup.DataSourceLookup; import org.springframework.stereotype.Component; public class MyDataSource extends AbstractRoutingDataSource{ private Map<String,String> myds; public Map<String,String> getMyds() { return myds; } public void setMyds(Map<String,String> myds) { this.myds = myds; } @Override public Object determineCurrentLookupKey() { return DataSourceContextHolder.getDataSourceName(); } @Override public void setDataSourceLookup(DataSourceLookup dataSourceLookup) { super.setDataSourceLookup(dataSourceLookup); } @Override public void setDefaultTargetDataSource(Object defaultTargetDataSource) { super.setDefaultTargetDataSource(defaultTargetDataSource); } @Override public void setTargetDataSources(Map targetDataSources) { super.setTargetDataSources(targetDataSources); //重点 super.afterPropertiesSet(); } @Override public Logger getParentLogger() throws SQLFeatureNotSupportedException { // TODO Auto-generated method stub return null; } }
前台页面:
index.jap
<%@ 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="student_addUI">ADDstudents</a> <br> <br> <a href="student_list">LISTstudents</a> <br> <br> <a href="student_dataSource0">dataSource0</a> <br> <br> <a href="student_dataSource1">dataSource1</a> </body> </html>
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> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <s:iterator value="#stusList"> <tr> <td>${id}</td> <td>${name}</td> <br> </tr> </s:iterator> </body> </html>
addUI.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"> <%@ taglib prefix="s" uri="/struts-tags" %> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <s:form action="student_add" method="post"> <s:textfield name="id" label="学生ID"></s:textfield> <s:textfield name="name" label="学生姓名"></s:textfield> <input type="submit" value="提 交"/s> </s:form> </body> </html>