SSH整合思路：
1、导入所需要的pom依赖
2、几大框架的配置文件（web.xml/struts.xml、hibernate的配置、spring的配置）3、spring与hibernate整合桥接的配置文件替换掉了hibernate.cfg.xml spring-hibernate.xml(难点) 注册数据库连接信息文件 配置数据库连接池（新的知识点） 配置sessionfactory 配置声明式事务（aop） 配置Base模块4、配置struts.xml5、做测试①导入依赖
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.psy</groupId> <artifactId>SSH</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>SSH Maven Webapp</name> <url>http://maven.apache.org</url> <properties> <hibernate.version>5.2.12.Final</hibernate.version> <mysql.version>5.1.44</mysql.version> <spring.version>5.0.1.RELEASE</spring.version> <struts2.version>2.5.13</struts2.version> <slf4j.version>1.7.7</slf4j.version> <log4j2.version>2.9.1</log4j2.version> <disruptor.version>3.2.0</disruptor.version> <junit.version>4.12</junit.version> <javax.servlet.version>4.0.0</javax.servlet.version> <jstl.version>1.2</jstl.version> <standard.version>1.1.2</standard.version> <tomcat-jsp-api.version>8.0.47</tomcat-jsp-api.version> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> <!-- 5、other --> <!-- 5.1、junit --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>${junit.version}</version> <scope>test</scope> </dependency> <!-- 5.2、servlet --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>${javax.servlet.version}</version> <scope>provided</scope> </dependency> <!-- 5.3、jstl、standard --> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>${jstl.version}</version> </dependency> <dependency> <groupId>taglibs</groupId> <artifactId>standard</artifactId> <version>${standard.version}</version> </dependency> <!-- 5.4、tomcat-jsp-api --> <dependency> <groupId>org.apache.tomcat</groupId> <artifactId>tomcat-jsp-api</artifactId> <version>${tomcat-jsp-api.version}</version> </dependency> <!-- 1、导入hibernate依赖 --> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>${hibernate.version}</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-c3p0</artifactId> <version>${hibernate.version}</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-ehcache</artifactId> <version>${hibernate.version}</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> <!-- 2、导入spring依赖 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>${spring.version}</version> </dependency> <!-- 3、导入struts2依赖 --> <dependency> <groupId>org.apache.struts</groupId> <artifactId>struts2-core</artifactId> <version>${struts2.version}</version> </dependency> <dependency> <groupId>org.apache.struts</groupId> <artifactId>struts2-spring-plugin</artifactId> <version>${struts2.version}</version> </dependency> <!-- 4、导入日志系统依赖 --> <!-- log配置：Log4j2 + Slf4j --> <!-- slf4j核心包 --> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>${slf4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>jcl-over-slf4j</artifactId> <version>${slf4j.version}</version> <scope>runtime</scope> </dependency> <!--用于与slf4j保持桥接 --> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-slf4j-impl</artifactId> <version>${log4j2.version}</version> </dependency> <!--核心log4j2jar包 --> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-api</artifactId> <version>${log4j2.version}</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-core</artifactId> <version>${log4j2.version}</version> </dependency> <!--web工程需要包含log4j-web，非web工程不需要 --> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-web</artifactId> <version>${log4j2.version}</version> <scope>runtime</scope> </dependency> <!--需要使用log4j2的AsyncLogger需要包含disruptor --> <dependency> <groupId>com.lmax</groupId> <artifactId>disruptor</artifactId> <version>${disruptor.version}</version> </dependency> </dependencies> <build> <finalName>SSH</finalName> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.7.0</version> <configuration> <source>1.8</source> <target>1.8</target> <encoding>UTF-8</encoding> </configuration> </plugin> </plugins> </build> </project>
框架配置文件web.xml
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1"> <display-name>Archetype Created Web Application</display-name> <!-- Spring与web整合需要监听器 spring ioc 由spring-web.jar 整合Struts框架，配送StrutsPrepareAndExecuteFilter 要处理jsp传递到后台的乱码问题 配置过滤器 spring提供的过滤器 防止内存溢出的配置 --> <!-- 1、整合spring --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-context.xml</param-value> </context-param> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <!-- 2、整合struts2 --> <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>*.action</url-pattern> </filter-mapping> <!-- 3、添加过滤器 --> <filter> <filter-name>encodingFilter</filter-name> <filter-class> org.springframework.web.filter.CharacterEncodingFilter </filter-class> <async-supported>true</async-supported> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>
②配置映射文件
db.properties
spring与hibernate整合桥接的配置文件替换掉了hibernate.cfg.xml,注册数据库连接信息文件
db.username=psy db.password=123 db.driverClass=com.mysql.jdbc.Driver db.jdbcUrl=jdbc:mysql://127.0.0.1:3306/psy?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT&useSSL=false db.initialPoolSize=10 db.maxPoolSize=20 db.minPoolSize=5 db.maxIdleTime=60 db.acquireIncrement=5 db.maxStatements=0 db.idleConnectionTestPeriod=60 db.acquireRetryAttempts=30 db.breakAfterAcquireFailure=true db.testConnectionOnCheckout=false
spring-hibernate.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: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-4.3.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd"> <!-- 1、注册jdbc相关的配置文件 --> <context:property-placeholder location="classpath:db.properties" /> <!-- 2、配置数据库连接池C3P0 --> <!-- 注册数据库连接文件db.properties --> <context:property-placeholder location="classpath:db.properties" /> <!-- 配置c3p0连接池 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="user" value="${db.username}"></property> <property name="password" value="${db.password}"></property> <property name="driverClass" value="${db.driverClass}"></property> <property name="jdbcUrl" value="${db.jdbcUrl}"></property> <!--初始化时获取的连接数，取值应在minPoolSize与maxPoolSize之间。Default: 3 --> <property name="initialPoolSize" value="${db.initialPoolSize}"></property> <!--连接池中保留的最大连接数。Default: 15 --> <property name="maxPoolSize" value="${db.maxPoolSize}"></property> <!--连接池中保留的最小连接数。 --> <property name="minPoolSize" value="${db.minPoolSize}" /> <!--最大空闲时间,60秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0 --> <property name="maxIdleTime" value="${db.maxIdleTime}" /> <!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3 --> <property name="acquireIncrement" value="${db.acquireIncrement}" /> <!--JDBC的标准参数，用以控制数据源内加载的PreparedStatements数量。但由于预缓存的statements 属于单个connection而不是整个连接池。 所以设置这个参数需要考虑到多方面的因素。如果maxStatements与maxStatementsPerConnection均为0，则缓存被关闭。Default: 0 --> <property name="maxStatements" value="${db.maxStatements}" /> <!--每60秒检查所有连接池中的空闲连接。Default: 0 --> <property name="idleConnectionTestPeriod" value="${db.idleConnectionTestPeriod}" /> <!--定义在从数据库获取新连接失败后重复尝试的次数。Default: 30 --> <property name="acquireRetryAttempts" value="${db.acquireRetryAttempts}" /> <!--获取连接失败将会引起所有等待连接池来获取连接的线程抛出异常。但是数据源仍有效 保留，并在下次调用getConnection()的时候继续尝试获取连接。 如果设为true，那么在尝试 获取连接失败后该数据源将申明已断开并永久关闭。Default: false --> <property name="breakAfterAcquireFailure" value="${db.breakAfterAcquireFailure}" /> <!--因性能消耗大请只在需要的时候使用它。如果设为true那么在每个connection提交的 时候都将校验其有效性。建议使用idleConnectionTestPeriod 或automaticTestTable 等方法来提升连接测试的性能。Default: false --> <property name="testConnectionOnCheckout" value="${db.breakAfterAcquireFailure}" /> </bean> <!-- 3、配置sessionfactory相关信息 --> <bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean"> <!-- 数据源 --> <property name="dataSource"> <ref bean="dataSource" /> </property> <!-- hibernate相关属性 --> <property name="hibernateProperties"> <props> <prop key="dialect">org.hibernate.dialect.MySQLDialect</prop> <!--spring与Hibernate集成无法显示sql语句问题，请见集成后hibernate无法显示sql语句.txt --> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.format_sql">true</prop> </props> </property> <!-- 实体映射文件 --> <property name="mappingResources"> <list> <value>com/psy/book/entity/Book.hbm.xml</value> </list> </property> </bean> <!-- 4、配置事务 --> <!--声明式事务配置开始 --> <!-- 静态代理： 一个代理对象->一个目标对象 BookProxy(BookBizImpl+myMethodBeforeAdvice)->bookBiz OrderProxy(OrderBizImpl+myMethodBeforeAdvice2)-> OrderBiz 动态代理： 一个代理对象->多个目标对象 --> <!--1) 开启自动代理 --> <aop:aspectj-autoproxy /> <!--2) 事务管理器 --> <bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory" /> </bean> <!--3) 定义事务特性 --> <!-- 下面定义了增删改查事务规则，意味着只有符合下面命名规则的方法，才会获取到session，以及提交事务 --> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="add*" propagation="REQUIRED" /> <tx:method name="save*" propagation="REQUIRED" /> <tx:method name="insert*" propagation="REQUIRED" /> <tx:method name="edit*" propagation="REQUIRED" /> <tx:method name="update*" propagation="REQUIRED" /> <tx:method name="del*" propagation="REQUIRED" /> <tx:method name="remove*" propagation="REQUIRED" /> <tx:method name="load*" propagation="REQUIRED" read-only="true" /> <tx:method name="list*" propagation="REQUIRED" read-only="true" /> <tx:method name="select*" propagation="REQUIRED" read-only="true" /> <tx:method name="query*" propagation="REQUIRED" read-only="true" /> <tx:method name="do*" propagation="REQUIRED" /> </tx:attributes> </tx:advice> <!--4) 定义切入点 --> <!-- 为什么一定要切在biz对应的接口上 --> <aop:config> <!-- pointcut属性用来定义一个切入点，分成四个部分理解 [* ][*..][*Biz][.*(..)] --> <!-- A： 返回类型，*表示返回类型不限 --> <!-- B： 包名，*..表示包名不限 --> <!-- C： 类或接口名，*Biz表示类或接口必须以Biz结尾 --> <!-- D： 方法名和参数，*(..)表示方法名不限，参数类型和个数不限 --> <aop:advisor advice-ref="txAdvice" pointcut="execution(* *..*Biz.*(..))" /> </aop:config> <!-- 声明式事务配置结束 --> <!-- 5、配置HibernateTemplate --> <bean class="org.springframework.orm.hibernate5.HibernateTemplate" id="hibernateTemplate"> <property name="sessionFactory" ref="sessionFactory"></property> </bean> <!-- 6、分模块开发（只配置base模块） --> <bean class="com.psy.base.entity.BaseEntity" abstract="true" id="baseEntity"></bean> <bean class="com.psy.base.dao.BaseDao" abstract="true" id="baseDao" > <property name="hibernateTemplate" ref="hibernateTemplate"></property> </bean> <bean class="com.psy.base.biz.BaseBiz" abstract="true" id="baseBiz"></bean> <bean class="com.psy.base.web.BaseAction" abstract="true" id="baseAction"></bean> </beans>
spring-context.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: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-4.3.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd"> <import resource="spring-hibernate.xml"/> <import resource="spring-book.xml"/> </beans>
spring-book.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: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-4.3.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd"> <bean id="bookDao" class="com.psy.book.dao.BookDao" parent="baseDao"></bean> <bean id="bookBiz" class="com.psy.book.biz.impl.BookBizImpl" parent="baseBiz"> <property name="bookDao" ref="bookDao"></property> </bean> <bean id="bookAction" class="com.psy.book.web.BookAction" parent="baseAction"> <property name="bookBiz" ref="bookBiz"></property> </bean> </beans>
struts-base.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> <constant name="struts.i18n.encoding" value="UTF-8" /> <constant name="struts.devMode" value="true" /> <constant name="struts.configuration.xml.reload" value="true" /> <constant name="struts.i18n.reload" value="true" /> <constant name="struts.enable.DynamicMethodInvocation" value="true" /> <package name="base" extends="struts-default" abstract="true"> <global-allowed-methods>regex:.*</global-allowed-methods> </package> </struts>
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-default.xml"></include>
<include file="struts-base.xml"></include>
<include file="struts-sy.xml"></include>
</struts>
struts-sy.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> <package name="sy" extends="base" namespace="/sy"> <!-- 这里的class不再是全路径名了，而是spring所管理的Bean的id--> <action name="/book_*" class="bookAction" method="{1}"> </action> </package> </struts>
③ Base层
BaseDao
package com.psy.base.dao; import java.io.Serializable; import java.util.Collection; import java.util.List; import java.util.Map; import org.hibernate.Session; import org.hibernate.query.Query; import org.springframework.orm.hibernate5.support.HibernateDaoSupport; import com.psy.base.util.PageBean; public class BaseDao extends HibernateDaoSupport implements Serializable{ private static final long serialVersionUID = 5427369434249665701L; public void setParam(Query query,Map<String, Object> map) { if(map == null || map.size() < 1) { return; } Object value = null; for(Map.Entry<String, Object> entry:map.entrySet()) { value = entry.getValue(); if(value instanceof Collection) { query.setParameterList(entry.getKey(), (Collection) value); }else if(value instanceof Object[]) { query.setParameterList(entry.getKey(), (Object[]) value); }else { query.setParameter(entry.getKey(), value); } } } public String getCountHql(String hql) { int index = hql.toUpperCase().indexOf("FROM"); return "select count(*) "+hql.substring(index); } /** * * @param hql 已经拼装好的 * @param map * @param pageBean * @return */ public List executeQuery(Session session, String hql,Map<String, Object> map,PageBean pageBean) { if(pageBean !=null && pageBean.isPagination()) { String countHql = getCountHql(hql); Query countQuery = session.createQuery(countHql); this.setParam(countQuery, map); pageBean.setTotal(countQuery.getSingleResult().toString()); Query query = session.createQuery(hql); this.setParam(query, map); query.setFirstResult(pageBean.getStartIndex()); query.setMaxResults(pageBean.getRows()); List list = query.list(); return list; }else { Query query = session.createQuery(hql); this.setParam(query, map); List list = query.list(); return list; } } }
BaseEntity
package com.psy.base.entity; import java.io.Serializable; public class BaseEntity implements Serializable{ private static final long serialVersionUID = -6998377863326368564L; }
PageBean
/** * 分页工具类 * */ public class PageBean { private int page = 1;// 页码 private int rows = 10;// 页大小 private int total = 0;// 总记录数 private boolean pagination = true;// 是否分页 // 获取前台向后台提交的所有参数 private Map<String, String[]> parameterMap; // 获取上一次访问后台的url private String url; /** * 初始化pagebean * * @param req */ public void setRequest(HttpServletRequest req) { this.setPage(req.getParameter("page")); this.setRows(req.getParameter("rows")); // 只有jsp页面上填写pagination=false才是不分页 this.setPagination(!"fasle".equals(req.getParameter("pagination"))); this.setParameterMap(req.getParameterMap()); this.setUrl(req.getRequestURL().toString()); } public int getMaxPage() { return this.total % this.rows == 0 ? this.total / this.rows : this.total / this.rows + 1; } public int nextPage() { return this.page < this.getMaxPage() ? this.page + 1 : this.getMaxPage(); } public int previousPage() { return this.page > 1 ? this.page - 1 : 1; } public PageBean() { super(); } public int getPage() { return page; } public void setPage(int page) { this.page = page; } public void setPage(String page) { this.page = StringUtils.isBlank(page) ? this.page : Integer.valueOf(page); } public int getRows() { return rows; } public void setRows(int rows) { this.rows = rows; } public void setRows(String rows) { this.rows = StringUtils.isBlank(rows) ? this.rows : Integer.valueOf(rows); } public int getTotal() { return total; } public void setTotal(int total) { this.total = total; } public void setTotal(String total) { this.total = Integer.parseInt(total); } public boolean isPagination() { return pagination; } public void setPagination(boolean pagination) { this.pagination = pagination; } public Map<String, String[]> getParameterMap() { return parameterMap; } public void setParameterMap(Map<String, String[]> parameterMap) { this.parameterMap = parameterMap; } public String getUrl() { return url; } public void setUrl(String url) { this.url = url; } /** * 获得起始记录的下标 * * @return */ public int getStartIndex() { return (this.page - 1) * this.rows; } @Override public String toString() { return "PageBean [page=" + page + ", rows=" + rows + ", total=" + total + ", pagination=" + pagination + ", parameterMap=" + parameterMap + ", url=" + url + "]"; } }
StringUtils
public class StringUtils { // 私有的构造方法，保护此类不能在外部实例化 private StringUtils() { } /** * 如果字符串等于null或去空格后等于""，则返回true，否则返回false * * @param s * @return */ public static boolean isBlank(String s) { boolean b = false; if (null == s || s.trim().equals("")) { b = true; } return b; } /** * 如果字符串不等于null或去空格后不等于""，则返回true，否则返回false * * @param s * @return */ public static boolean isNotBlank(String s) { return !isBlank(s); } }
BaseAction
package com.psy.base.web; import java.io.Serializable; import javax.servlet.ServletContext; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.apache.struts2.interceptor.ServletRequestAware; import org.apache.struts2.interceptor.ServletResponseAware; public class BaseAction implements ServletRequestAware, ServletResponseAware,Serializable{ private static final long serialVersionUID = -7110462505161900879L; /** * 为了传值使用 */ protected HttpServletResponse response; protected HttpServletRequest request; protected HttpSession session; protected ServletContext application; /** * 为了配置跳转页面所用 */ protected final static String SUCCESS = "success"; protected final static String FAIL = "fail"; protected final static String LIST = "list"; protected final static String ADD = "add"; protected final static String EDIT = "edit"; protected final static String DETAIL = "detail"; /** * 具体传值字段 后端向jsp页面传值所用字段 */ protected Object result; protected Object msg; protected int code; public Object getResult() { return result; } public Object getMsg() { return msg; } public int getCode() { return code; } @Override public void setServletResponse(HttpServletResponse arg0) { this.response = arg0; } @Override public void setServletRequest(HttpServletRequest arg0) { this.request = arg0; this.session = arg0.getSession(); this.application = arg0.getServletContext(); } }
Book 继承base
BookBiz
package com.psy.book.biz; import java.util.List; import com.psy.book.entity.Book; public interface BookBiz { public int add(Book book); public List<Book> list(); }
BookBizImpl
package com.psy.book.biz.impl; import java.util.List; import com.psy.book.biz.BookBiz; import com.psy.book.dao.BookDao; import com.psy.book.entity.Book; public class BookBizImpl implements BookBiz{ private BookDao bookDao; public BookDao getBookDao() { return bookDao; } public void setBookDao(BookDao bookDao) { this.bookDao = bookDao; } @Override public int add(Book book) { // TODO Auto-generated method stub return bookDao.add(book); } @Override public List<Book> list() { // TODO Auto-generated method stub return bookDao.list(); } }
BookDao
package com.psy.book.dao; import java.util.List; import org.hibernate.HibernateException; import org.hibernate.Session; import org.springframework.orm.hibernate5.HibernateCallback; import com.psy.base.dao.BaseDao; import com.psy.book.entity.Book; public class BookDao extends BaseDao{ private static final long serialVersionUID = -5026446896936708295L; public int add(Book book) { return (int) this.getHibernateTemplate().save(book); } public List<Book> list(){ return this.getHibernateTemplate().execute(new HibernateCallback<List<Book>>() { @Override public List<Book> doInHibernate(Session session) throws HibernateException { return session.createQuery("from Book").list(); } }); } }
Book
package com.psy.book.entity; import com.psy.base.entity.BaseEntity; public class Book extends BaseEntity{ private static final long serialVersionUID = 2754269901443210907L; private Integer bid; private String bname; private Float price; public Integer getBid() { return bid; } public void setBid(Integer bid) { this.bid = bid; } public String getBname() { return bname; } public void setBname(String bname) { this.bname = bname; } public Float getPrice() { return price; } public void setPrice(Float price) { this.price = price; } @Override public String toString() { return "Book [bid=" + bid + ", bname=" + bname + ", price=" + price + "]"; } }
Book.hbm.xml hibernate映射文件
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping> <class table="t_mvc_book" name="com.psy.book.entity.Book"> <id name="bid" type="java.lang.Integer" column="bid"> <generator class="increment"></generator> </id> <property name="bname" type="java.lang.String" column="bname"></property> <property name="price" type="java.lang.Float" column="price"></property> </class> </hibernate-mapping>
BookAction
package com.psy.book.web; import java.util.List; import com.opensymphony.xwork2.ModelDriven; import com.psy.base.web.BaseAction; import com.psy.book.biz.BookBiz; import com.psy.book.entity.Book; public class BookAction extends BaseAction implements ModelDriven<Book>{ // book实现了ModelDriven接口，那么意味着封装了jsp传递到后台的所有参数，详情参见Struts private Book book=new Book(); private static final long serialVersionUID = 4265255021434576306L; private BookBiz bookBiz; public BookBiz getBookBiz() { return bookBiz; } public void setBookBiz(BookBiz bookBiz) { this.bookBiz = bookBiz; } public String add() { this.bookBiz.add(book); return null; } public String list() { List<Book> list = this.bookBiz.list(); for (Book b : list) { System.out.println(b); } return null; } @Override public Book getModel() { // TODO Auto-generated method stub return book; } }
为什么一定要切在biz对应的接口上？？？
/** * 为什么一定要切在biz对应的接口上 * BookBizImpl->MoneyBizImpl * transfer 转账的方法 * from,to * this.MoneyDao.update(from) from用户的钱减少 * this.MoneyDao.update(to) from用户的钱增加 * * 解释： * 试想一下如果说事物的切面点在dao上面，意味着 * Transaction t = session.beginTransaction() * this.MoneyDao.update(from) * t.commit(); * * Transaction t = session.beginTransaction() * this.MoneyDao.update(to) * t.commit(); * * * 此时调用MoneyBizImpl.transfer方法 * Transaction t = session.beginTransaction() * this.MoneyDao.update(from) * t.commit(); * * 此处发生异常 * * Transaction t = session.beginTransaction() * this.MoneyDao.update(to) * t.commit(); * * 结论：由上可知 *转账涉及到两个用户不在一个事物中如果中途发生异常，回滚的话不会保证数据的唯一性 *MoneAction中调用MoneyBizIMpl.transfer方法 * * Transaction t = session.beginTransaction() * this.MoneyDao.update(from,to) *this.MoneyDao.update(from) from用户的钱减少 * this.MoneyDao.update(to) from用户的钱增加 * t.commit(); */