如何搭建SSH+JPA+mysql项目

1.打开eclipse，新建一个dynamic web project

2.导入所需的lib（需要提前下载好）

struts-lib: struts\apps\struts2-blank\WEB-INF\lib

spring-lib:spring-framework-4.1.0.RELEASE\libs

hibernate-lib:hibernate-release-4.3.10.Final\lib\required

jpa-lib: hibernate-release-4.3.10.Final\lib\jpa

二级缓存lib: hibernate-release-4.3.10.Final\lib\optional\ehcache

mysql-lib： mysql-connector-java-5.1.7-bin.jar

c3p0-lib：hibernate-release-4.3.10.Final\lib\optional\c3p0

并删除lib中 javassist-*.jar中版本低的，然后build path

3.新建db.properties数据库配置文件

user=rootpassword=jdbcUrl=jdbc:mysql:///sshjpadriverClass=com.mysql.jdbc.Driver

4.获取struts.xml
从struts-2.3.20.1\apps\struts2-blank\WEB-INF\src\java中复制struts.xml到src目录下

<?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>    <package name="default" namespace="/" extends="struts-default">    </package></struts>

5.获取web.xml
从struts-2.3.20.1\apps\struts2-blank\WEB-INF中复制web.xml到WEB-INF目录下

<?xml version="1.0" encoding="UTF-8"?><web-app id="WebApp_9" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">    <display-name>Struts Blank</display-name>    <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>    <!-- needed for ContextLoaderListener -->    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>classpath:applicationContext.xml</param-value>    </context-param>    <!-- Bootstraps the root web application context before servlet initialization -->    <listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener></web-app>

6.新建applicationContext.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"    xmlns:p="http://www.springframework.org/schema/p"    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd">    <!-- 导入资源文件 -->    <context:property-placeholder location="classpath:db.properties"/>    <!-- 配置数据源 -->    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"        p:user="${user}" p:password="${password}"         p:jdbcUrl="${jdbcUrl}" p:driverClass="${driverClass}"        p:minPoolSize="1" p:maxPoolSize="10" p:acquireIncrement="2"         p:maxStatements="5" />    <!-- 配置EntityManagerFactory -->    <bean id="EntityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">        <!-- 数据源 -->        <property name="dataSource" ref="dataSource"></property>        <!-- 配置JPA提供商的适配器 -->        <property name="jpaVendorAdapter">            <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>        </property>        <!-- 配置JPA基本属性 -->        <property name="jpaProperties">            <props>                <prop key="hibernate.show_sql">true</prop>                <prop key="hibernate.format_sql">true</prop>                <prop key="hibernate.hbm2ddl.auto">update</prop>            </props>        </property>        <!-- 配置实体类所在的包 -->        <property name="packagesToScan" value="com.sshjpa.entities"/>    </bean>    <!-- 配置JPA的事务管理器 -->    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">        <property name="entityManagerFactory" ref="EntityManagerFactory"></property>    </bean>    <!-- 配置支持基于注解的事务配置 -->    <tx:annotation-driven transaction-manager="transactionManager"/>    <!-- 启动AspectJ支持 -->    <aop:aspectj-autoproxy/>        <!-- 扫描组件 -->    <context:component-scan base-package="com.sshjpa.entities"/></beans>

7.建立一个package，命名为com.sshjpa.entities

8.在com.sshjpa.entities下建立一个class，命名为User

package com.sshjpa.entities;import javax.persistence.Column;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.Table;import org.springframework.stereotype.Component;@Component@Table(name="users")@Entitypublic class User {    private Integer id;    private String name;    @Column(name="ID")    @GeneratedValue    @Id    public Integer getId() {        return id;    }    public void setId(Integer id) {        this.id = id;    }    @Column(name="NAME")    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }}

最后，启动项目，看数据库是否产生users表，如果有，则成功，反之，失败