一个简单的项目（click+spring+eclipselink jpa）

一、框架介绍

1.Apache Click 是一个先进的Java企业版的Web应用程序框架，提供一个基于浏览器的富客户端编程模型。

主要的特点包括：

• 易学
• 面向组件和页面的设计
• 基于事件的编程模型
• 性能非常好
• 自动的表单生成以及客户端、服务器端数据验证
• 支持 Velocity、JSP、FreeMarker 等模板引擎
• 采用 Apache 开源协议
• 支持 JDK 1.4 以及以后的版本

2.eclipselink jpa是一个类似于hibernate的持久化框架，通过注解的方式实现简单映射。

3.spring就不多介绍，数据库使用mysql，项目管理用maven

 

二、编写框架对应的配置文件

1.通过maven生成一个工程，如工程名为click，然后为工程新建两个maven module，一个为web工程click-web，另一个为普通java工程click-core。

2.为每个工程的pom文件中加入对应的依赖包：

click的pom：

Xml代码

1. <artifactId>click</artifactId>  
2.     <groupId>com.xxx</groupId>  
3.     <version>0.0.1-SNAPSHOT</version>  
4.     <packaging>pom</packaging>  
5.     <modules>  
6.         <module>click-core</module>  
7.         <module>click-web</module>  
8.     </modules>  
9.     <dependencies>  
10.                   <!--加入一些公用包-->  
11.         <dependency>  
12.           <groupId>junit</groupId>  
13.           <artifactId>junit</artifactId>  
14.           <version>4.11</version>  
15.     </dependency>  
16.     <dependency>  
17.       <groupId>commons-lang</groupId>  
18.       <artifactId>commons-lang</artifactId>  
19.       <version>2.6</version>  
20.     </dependency>  
21.     </dependencies>  

 3.click-web的pom：（加入click框架所需包）

Xml代码

1. <parent>  
2.     <artifactId>click</artifactId>  
3.     <groupId>com.xxx</groupId>  
4.     <version>0.0.1-SNAPSHOT</version>  
5.   </parent>  
6.   <groupId>com.xxx</groupId>  
7.   <artifactId>click-web</artifactId>  
8.   <version>0.0.1-SNAPSHOT</version>  
9.   <packaging>war</packaging>  
10.   <name>click-web Maven Webapp</name>  
11.   <url>http://maven.apache.org</url>  
12.   <properties>  
13.     <javax.servlet.version>2.5</javax.servlet.version>  
14.     <click.version>2.3.0</click.version>  
15.   </properties>  
16.   <dependencies>  
17.     <dependency>  
18.         <groupId>com.yaolinnan</groupId>  
19.         <artifactId>click-core</artifactId>  
20.         <version>0.0.1-SNAPSHOT</version>  
21.     </dependency>  
22.     <dependency>  
23.             <groupId>javax.servlet</groupId>  
24.             <artifactId>servlet-api</artifactId>  
25.             <scope>provided</scope>  
26.             <version>${javax.servlet.version}</version>  
27.         </dependency>  
28.           
29.     <dependency>  
30.         <groupId>org.apache.click</groupId>  
31.         <artifactId>click-nodeps</artifactId>  
32.         <version>${click.version}</version>  
33.         <scope>compile</scope>  
34.     </dependency>  
35.   
36.     <dependency>  
37.         <groupId>org.apache.click</groupId>  
38.         <artifactId>click-extras</artifactId>  
39.         <version>${click.version}</version>  
40.         <scope>compile</scope>  
41.     </dependency>  
42.       
43.   </dependencies>  
44.   <build>  
45.     <finalName>click-web</finalName>  
46.   </build>  

 4.click-core的pom：（加入spring和eclipselink包）

Xml代码

1. <parent>  
2.     <artifactId>click</artifactId>  
3.     <groupId>com.xxx</groupId>  
4.     <version>0.0.1-SNAPSHOT</version>  
5.   </parent>  
6.   <groupId>com.xxx</groupId>  
7.   <artifactId>click-core</artifactId>  
8.   <version>0.0.1-SNAPSHOT</version>  
9.   <name>click-core</name>  
10.   <packaging>jar</packaging>  
11.   <url>http://maven.apache.org</url>  
12.   <properties>  
13.     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>  
14.     <jpa.version>2.0.0</jpa.version>  
15.     <spring.version>3.0.6.RELEASE</spring.version>  
16.   </properties>  
17.   <dependencies>  
18.    <dependency>    
19.         <groupId>org.eclipse.persistence</groupId>    
20.         <artifactId>javax.persistence</artifactId>    
21.         <version>${jpa.version}</version>    
22.     </dependency>    
23.     <dependency>  
24.             <groupId>org.eclipse.persistence</groupId>  
25.             <artifactId>eclipselink</artifactId>  
26.             <version>2.4.1</version>  
27.         </dependency>  
28.   
29.         <dependency>  
30.             <groupId>commons-pool</groupId>  
31.             <artifactId>commons-pool</artifactId>  
32.             <version>1.5.4</version>  
33.         </dependency>  
34.         <dependency>  
35.             <groupId>commons-beanutils</groupId>  
36.             <artifactId>commons-beanutils-core</artifactId>  
37.             <version>1.8.3</version>  
38.         </dependency>  
39.         <dependency>  
40.             <groupId>commons-lang</groupId>  
41.             <artifactId>commons-lang</artifactId>  
42.             <version>2.6</version>  
43.         </dependency>  
44.       <dependency>  
45.             <groupId>org.springframework</groupId>  
46.             <artifactId>spring-core</artifactId>  
47.             <version>${spring.version}</version>  
48.         </dependency>  
49.         <dependency>  
50.             <groupId>org.springframework</groupId>  
51.             <artifactId>spring-web</artifactId>  
52.             <version>${spring.version}</version>  
53.         </dependency>  
54.         <dependency>  
55.             <groupId>org.springframework</groupId>  
56.             <artifactId>spring-beans</artifactId>  
57.             <version>${spring.version}</version>  
58.         </dependency>  
59.         <dependency>  
60.             <groupId>org.springframework</groupId>  
61.             <artifactId>spring-context</artifactId>  
62.             <version>${spring.version}</version>  
63.         </dependency>  
64.         <dependency>  
65.             <groupId>org.springframework</groupId>  
66.             <artifactId>spring-aop</artifactId>  
67.             <version>${spring.version}</version>  
68.         </dependency>  
69.         <dependency>  
70.             <groupId>org.springframework</groupId>  
71.             <artifactId>spring-context-support</artifactId>  
72.             <version>${spring.version}</version>  
73.         </dependency>  
74.         <dependency>  
75.             <groupId>org.springframework</groupId>  
76.             <artifactId>spring-tx</artifactId>  
77.             <version>${spring.version}</version>  
78.         </dependency>  
79.         <dependency>  
80.             <groupId>org.springframework</groupId>  
81.             <artifactId>spring-orm</artifactId>  
82.             <version>${spring.version}</version>  
83.         </dependency>  
84.         <dependency>  
85.             <groupId>org.springframework</groupId>  
86.             <artifactId>spring-jdbc</artifactId>  
87.             <version>${spring.version}</version>  
88.         </dependency>  
89.         <dependency>  
90.             <groupId>org.springframework</groupId>  
91.             <artifactId>spring-test</artifactId>  
92.             <version>${spring.version}</version>  
93.         </dependency>  
94.         <dependency>  
95.             <groupId>javax.annotation</groupId>  
96.             <artifactId>jsr250-api</artifactId>  
97.             <version>1.0</version>  
98.             <scope>provided</scope>  
99.         </dependency>  
100.         <dependency>  
101.             <groupId>javax.transaction</groupId>  
102.             <artifactId>jta</artifactId>  
103.             <version>1.1</version>  
104.             <scope>provided</scope>  
105.         </dependency>  
106.         <dependency>  
107.             <groupId>mysql</groupId>  
108.             <artifactId>mysql-connector-java</artifactId>  
109.             <version>5.1.9</version>  
110.         </dependency>  
111.         <dependency>    
112.            <groupId> org.aspectj</groupId >    
113.            <artifactId> aspectjweaver</artifactId >    
114.           <version> 1.6.11</version >    
115.         </dependency>    
116.         <dependency>  
117.       <groupId>commons-dbcp</groupId>  
118.       <artifactId>commons-dbcp</artifactId>  
119.       <version>1.4</version>  
120.     </dependency>  
121.           
122.   </dependencies>  

 5.在click-web工程下的src/main/resources目录下生成click.xml，编写click框架的配置信息：

Xml代码

1. <click-app charset="UTF-8">  
2.   
3.   <pages package="com.xxx.pages" automapping="true"/>  
4.   
5.   <mode value="debug"/>  
6.   
7. </click-app>  

 web.xml：

Xml代码

1. <web-app>  
2.   <display-name>click-web</display-name>  
3.   <servlet>  
4.     <servlet-name>ClickServlet</servlet-name>  
5.     <servlet-class>org.apache.click.extras.spring.SpringClickServlet</servlet-class>  
6.     <init-param>  
7.             <param-name>inject-page-beans</param-name>  
8.             <param-value>true</param-value>  
9.     </init-param>  
10.     <load-on-startup>0</load-on-startup>  
11.   </servlet>  
12.   
13.   <servlet-mapping>  
14.     <servlet-name>ClickServlet</servlet-name>  
15.     <url-pattern>*.htm</url-pattern>  
16.   </servlet-mapping>  
17.   <welcome-file-list>  
18.     <welcome-file>hello.htm</welcome-file>  
19.   </welcome-file-list>  
20.     
21.     
22.   <context-param>  
23.         <param-name>contextConfigLocation</param-name>  
24.         <param-value>           
25.             classpath*:spring/*.xml  
26.         </param-value>  
27.     </context-param>  
28.   
29.     <listener>  
30.         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
31.     </listener>  
32. </web-app>  

 

6.在click-core的src/main/resources目录下编写eclipselink框架的配置信息--persistence.xml

Xml代码

1. <persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">  
2.   <persistence-unit name="springjpaPU" transaction-type="RESOURCE_LOCAL">  
3.     <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>  
4.     <!-- 需要持久化的实体 -->  
5. <class>com.xxx.core.model.User</class>  
6.     <properties>  
7.         <property name="eclipselink.ddl-generation.output-mode" value="both" />  
8.     </properties>  
9.   
10.   </persistence-unit>  
11.     
12. </persistence>  

 在这个目录下新建spring/springcontext.xml，编写spring框架的配置信息

Java代码

1. <context:annotation-config/>  
2.     <context:component-scan base-package="com.xxx.core"/>  
3.     <tx:annotation-driven transaction-manager="transactionManager"/>  
4.       
5.     <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor"/>    
6.       
7.       <!-- Spring transaction manager -->  
8.     <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager" p:entityManagerFactory-ref="entityManagerFactory" />  
9.       
10.     <!-- JPA shared entity manager -->  
11.     <bean id="entityManager" class="org.springframework.orm.jpa.support.SharedEntityManagerBean" p:entityManagerFactory-ref="entityManagerFactory" />  
12.   
13.     
14.     
15.     <bean id="entityManagerFactory"  
16.        class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"  >  
17.         <property name="loadTimeWeaver">  
18.             <bean  
19.              class="com.xxx.core.util.NewInstrumentationLoadTimeWeaver"/>  
20.           
21.         </property>  
22.         <property name="dataSource" ref="mydataSource" />  
23.         <property name="JpaVendorAdapter" ref="jpaAdapter"/>  
24.         <property name="persistenceUnitName" value="springjpaPU"></property>  
25.         <property name="persistenceXmlLocation" value="classpath*:persistence.xml"/>    
26.           
27.     </bean>  
28.   
29.     <bean id="jpaAdapter" class="org.springframework.orm.jpa.vendor.EclipseLinkJpaVendorAdapter">  
30.         <property name="databasePlatform" value="org.eclipse.persistence.platform.database.MySQLPlatform" />  
31.         <property name="showSql" value="true" />  
32.     </bean>    
33.   <!--数据源配置-->  
34.     <bean id="mydataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">    
35.         <property name="driverClassName" value="${jdbc.driverClassName}"/>    
36.         <property name="url" value="${jdbc.url}"/>    
37.         <property name="username" value="${jdbc.username}"/>    
38.         <property name="password" value="${jdbc.password}"/>    
39.         <property name="maxIdle" value="10"/>    
40.         <property name="maxActive" value="100"/>    
41.         <property name="maxWait" value="10000"/>    
42.         <property name="testOnBorrow" value="true"/>    
43.         <property name="testWhileIdle" value="true"/>    
44.         <property name="timeBetweenEvictionRunsMillis" value="1200000"/>    
45.         <property name="minEvictableIdleTimeMillis" value="1800000"/>    
46.         <property name="numTestsPerEvictionRun" value="5"/>    
47.         <property name="defaultAutoCommit" value="true"/>    
48.     </bean>    
49.     
50.     <context:property-placeholder location="classpath*:spring/config.properties"/>    
51.     <!--DAO和Service注入-->  
52.     <bean id="userDAO" class="com.yaolinnan.core.dao.UserDAOImpl">  
53.     <property name="entityManager" ref="entityManager"></property>  
54.     </bean>  
55.     <bean id="userService" class="com.yaolinnan.core.service.UserServiceImpl"></bean>  

 

新建config.properties，编写数据库配置信息

Xml代码

1. # MySql  
2. jdbc.driverClassName=com.mysql.jdbc.Driver  
3. jdbcjdbc.url=jdbc:mysql://xxx  
4. jdbc.username=xxx  
5. jdbc.password=xxx  
6. jdbc.initialSize=1  
7. jdbc.maxIdle=2  
8. jdbc.minIdle=-1  
9. jdbc.maxWait=10000  
10. jdbc.maxActive=10  
11. jdbc.testOnBorrow=true  
12. jdbc.testOnReturn=true  
13. jdbc.testWhileIdle=true  
14. jdbc.logAbandoned=true  
15. jdbc.removeAbandoned=true  
16. jdbc.removeAbandonedTimeout=50  
17. jdbc.validationQuery=select count(*) from dual  
18. jdbc.timeBetweenEvictionRunsMillis=300000  
19. jdbc.minEvictableIdleTimeMillis=300000  

 三、程序编写

1.click-core编写实体类，对应数据库中的表

Java代码

1. @Entity   
2. @Table (name="xxx")  
3. public class User{  
4.       
5.     @Id  
6.     private int id;  
7.       
8.     private String userName;  
9.       
10.     private String loginName;  
11.       
12.     private String password;  
13.       
14.     private String email;  
15.       
16.     @Temporal(TemporalType.DATE)  
17.     private Date createDate;  
18.            
19.                 public int getId() {  
20.         return id;  
21.     }  
22.   
23.     public void setId(int id) {  
24.         this.id = id;  
25.     }  
26. .........加入属性对应的set和get方法  
27. }  

 2.编写DAO和Service（简单写下）

Java代码

1. public class UserDAOImpl implements UserDAO{  
2.       
3.       
4.     private EntityManager entityManager;  
5.   
6.     @Override  
7.     public List<User> getUsers() {  
8.         Query q=entityManager.createQuery("SELECT t FROM User t ORDER BY t.id ASC");  
9.         return q.getResultList();  
10.     }  
11.   
12.     @Override  
13.     public User getUserbyId(int id) {  
14.         return entityManager.find(User.class, id);  
15.     }  
16.   
17.     public EntityManager getEntityManager() {  
18.         return entityManager;  
19.     }  
20.       
21.     @PersistenceContext  
22.     public void setEntityManager(EntityManager entityManager) {  
23.         this.entityManager = entityManager;  
24.     }  
25.   
26.     @Override  
27.     public void saveUser(User user) {  
28.         entityManager.persist(user);  
29.     }  
30.   
31. }  

 

3.编写一个继承自InstrumentationLoadTimeWeaver的类，这个类避免了工程启动时去jvm配置 -javaagent：spring-agent.jar这个步骤，对应springcontext.xml中<property name="loadTimeWeaver">属性。

Java代码

1. public class NewInstrumentationLoadTimeWeaver extends InstrumentationLoadTimeWeaver{  
2.   
3.      @Override  
4.         public void addTransformer(ClassFileTransformer transformer) {  
5.            try {  
6.                super.addTransformer(transformer);  
7.            } catch (Exception e) {}  
8.         }  
9. }  

 4.在click-web编写page和页面来测试。

Java代码

1. public class Hello extends Page{  
2.   
3.       
4.     private static final long serialVersionUID = 1L;  
5.       
6.     private UserService userService;  
7.       
8.     private Table table=new Table("userTable");  
9.       
10.     private ActionLink delete=new ActionLink("delete",this,"onDelete");  
11.   
12.     @Override  
13.     public void onInit() {  
14.         this.addControl(table);  
15.         this.addControl(delete);  
16.         table.setClass(Table.CLASS_SIMPLE);//设置表格显示的样式  
17.         table.setPageSize(10);//设置一页显示的数量  
18.         table.setShowBanner(true);  
19.         table.setSortable(true);//设置表格排序  
20.         table.addColumn(new Column("userName","名称"));//第一列显示的标题和对应model的值  
21.         Column column = new Column("email","邮箱");  
22.         column.setAutolink(true);//设置自动关联url或者email地址  
23.         column.setTitleProperty("loginName");//设置指向当前列显示的值  
24.           
25.         table.addColumn(column);  
26.           
27.         delete.setImageSrc("images/u86.png");//设置ActionLink显示的图片  
28.         delete.setTitle("删除");//设置ActionLink显示的名称  
29.         delete.setAttribute("onclick", "return window.confirm('确定要删除当前用户吗?');");//设置ActionLink的css对应的值  
30.           
31.         column = new Column("操作");  
32.         column.setTextAlign("center");  
33.         AbstractLink[] links = new AbstractLink[] { delete};//为当前列加上ActionLink（可多个）  
34.         column.setDecorator(new LinkDecorator(table, links, "loginName"));//添加的ActionLink操作对应的值  
35.         column.setSortable(false);  
36.         table.addColumn(column);  
37.         List<User> rowList=userService.getUsers();  
38.          
39.         table.setRowList(rowList);//为表格添加数据  
40.         this.addModel("list", rowList);  
41.     }  
42.       
43.     public Boolean onDelete(){  
44.         String name=delete.getValue();//得到用户点击删除操作时所对应的值  
45.         this.addModel("name", name);  
46.         return true;  
47.     }  
48.   
49.     public UserService getUserService() {  
50.         return userService;  
51.     }  
52.   
53.     public void setUserService(UserService userService) {  
54.         this.userService = userService;  
55.     }  
56.       
57.   
58. }  

 

Html代码

1. <html>  
2. <head>  
3. <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">  
4. <title>click table</title>  
5. </head>  
6. <body>  
7.      $userTable  
8. #if($name)  
9.     <p>delete user name:$name</p>  
10. #end  
11.   
12. #foreach($user in $list)  
13.   
14.     <div>$user.userName</div>  
15. #end  
16. </body>  
17. </html>  

 

四、启动tomcat，并访问。