Spring+Struts2 整合

利用Spring+Struts2實現列表顯示

編寫DAO

1. 引入spring開發包和applicationContext.xml

   <!-- spring ioc\aop -->
   <dependency>
     <groupId>org.springframework</groupId>
     <artifactId>spring-context</artifactId>
     <version>4.3.12.RELEASE</version>
   </dependency>
   
    <!-- dao -->
   <dependency>
     <groupId>org.springframework</groupId>
     <artifactId>spring-jdbc</artifactId>
     <version>4.3.12.RELEASE</version>
   </dependency>
   <!-- mysql驅動包、連接池 -->
   <dependency>
     <groupId>mysql</groupId>
     <artifactId>mysql-connector-java</artifactId>
     <version>5.0.2</version>
   </dependency>
   <dependency>
     <groupId>c3p0</groupId>
     <artifactId>c3p0</artifactId>
     <version>0.9.1.2</version>
   </dependency>
   

2. 在Spring中配置DataSource組件

   <!-- 連接池配置 -->
   <bean id="c3p0" class="com.mchange.v2.c3p0.ComboPooledDataSource">
       <property name="user" value="root"></property>
       <property name="password" value="1234"></property>
       <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/studyonline"></property>
       <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
   </bean>
   

3. 在Spring中配置JdbcTemplate組件

   <bean id="template" class="org.springframework.jdbc.core.JdbcTemplate">
       <constructor-arg index="0" ref="c3p0"></constructor-arg>
   </bean>
   

4. 根據操作表編寫實體類

   Direction.java

5. 編寫Dao接口和實現類

   • 接口

     public interface DirectionDao {
         public List<Direction> findAll();
     }
     

   • 實現類(掃描、注入JdbcTemplate)

     @Repository("directionDao")
     public class DirectionDaoImpl implements DirectionDao{
     
         @Autowired
         private JdbcTemplate template;
     
         public List<Direction> findAll() {
             String sql  = "select * from direction";
             RowMapper<Direction> rowMapper = new BeanPropertyRowMapper<Direction>(Direction.class);
             List<Direction> list = template.query(sql, rowMapper);
             return list;
         }
     
     }
     

   • 掃描配置

     <context:component-scan base-package="cn.xdl"/>
     

Struts2和Spring結合

1. 將Action掃描到Spring容器，注入DAO

   @ParentPackage("struts-default")
   //@Namespace("/")
   @Controller
   @Scope("prototype")
   public class ListAction {
   
       private List<Direction> list;
   
       @Autowired
       private DirectionDao directionDao;
   
       @Action(value="list",results={@Result(location="/list.jsp")})
       public String list(){
           //調用DAO查詢數據表集合
           list = directionDao.findAll();
           return "success";
       }
       //省略set和get
   }
   

2. 引入struts2-spring-plugin.jar包

   作用：能使Struts2框架訪問Spring容器，從容器中調用Action對象。

   <!-- struts2整合spring -->
   <dependency>
     <groupId>org.apache.struts</groupId>
     <artifactId>struts2-spring-plugin</artifactId>
     <version>2.3.12</version>
   </dependency>
   

3. 在web.xml配置ContextLoaderListener

   作用：在服務器啓動時，實例化Spring容器以及內部組件對象。

     <!-- 配置Listener，用於tomcat啓動時實例化Spring容器對象 -->
     <listener>
       <listener-class>
       org.springframework.web.context.ContextLoaderListener
       </listener-class>
     </listener>
     <!-- 指定spring容器的xml配置文件 -->
     <context-param>
       <param-name>contextConfigLocation</param-name>
       <param-value>classpath:applicationContext.xml</param-value>
     </context-param>