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Struts2+Spring.md

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Struts2和Spring整合

Struts2: MVC结构

Spring: 容器（IOC/AOP）

##案例：hello world

/hello.action-->Filter控制器-->HelloAction(Spring)-->Result-->/WEB-INF/hello.jsp

  1. 搭建Struts2+Spring环境

    • 引入struts2和spring的jar包

    • 引入struts.xml和applicationContext.xml

    • 引入struts2-spring-plugin.jar包

        <dependencies>
    	<!-- struts相关包 -->
    	<dependency>
  	  <groupId>org.apache.struts</groupId>
  	  <artifactId>struts2-core</artifactId>
  	  <version>2.5.14.1</version>
  	</dependency>
  
  	<dependency>
  	  <groupId>org.apache.struts</groupId>
  	  <artifactId>struts2-json-plugin</artifactId>
  	  <version>2.5.14.1</version>
  	</dependency>
  	
  	<!-- 测试包 -->
  	<dependency>
  	  <groupId>junit</groupId>
  	  <artifactId>junit</artifactId>
  	  <version>4.12</version>
  	</dependency>
    	
    	<!-- jsp相关包 -->
  	<dependency>
  	  <groupId>jstl</groupId>
  	  <artifactId>jstl</artifactId>
  	  <version>1.2</version>
  	</dependency>
  	
  	
  	<!-- struts+spring,会自动将spring相关包引入 -->
  	<dependency>
  	  <groupId>org.apache.struts</groupId>
  	  <artifactId>struts2-spring-plugin</artifactId>
  	  <version>2.5.14.1</version>
  	</dependency>
  
  </dependencies>

    • 在web.xml配置ContextLoaderListener

        <context-param>
  	<param-name>contextConfigLocation</param-name>
  	<param-value>classpath:applicationContext.xml</param-value>
  </context-param>
  <!-- 内部加载contextConfigLocation指定的配置文件，创建Spring容器给StrutsSpringObjectFactory访问 -->
  <listener>
  	<listener-class>
  	org.springframework.web.context.ContextLoaderListener
  	</listener-class>
  </listener>

  2. 编写HelloAction，将它纳入Spring容器中

    HelloAction.java

     @Controller//默认id名为helloAction
 public class HelloAction {
 	
 	public String execute(){
 		System.out.println("进入HelloAction");
 		return "success";
 	}
 	
 }

    spring配置

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

  3. 编写hello.jsp

  4. 配置Struts2请求响应处理流程

    • 配置Filter控制器

        <filter>
  	<filter-name>strutsmvc</filter-name>
  	<filter-class>
  org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter
  	</filter-class>
  	<!-- 默认访问struts.xml -->
  </filter>
  <filter-mapping>
  	<filter-name>strutsmvc</filter-name>
  	<url-pattern>/*</url-pattern>
  </filter-mapping>

    • 配置Action+Result

        <package name="demo1" extends="struts-default">
  	
  	<!-- StrutsSpringObjectFactory根据class名做id查找Spring容器的Action对象 -->
  	<action name="hello" class="helloAction">
  		<result>/WEB-INF/hello.jsp</result>
  	</action>
  	
  </package>

案例：列表显示

编写DeptDao

  1. 追加spring-jdbc、驱动、dbcp连接池包

     <!-- spring-jdbc/驱动包 -->
 <dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-jdbc</artifactId>
   <version>4.1.9.RELEASE</version>
 </dependency>
 
 <dependency>
   <groupId>mysql</groupId>
   <artifactId>mysql-connector-java</artifactId>
   <version>5.1.42</version>
 </dependency>
 
 <dependency>
   <groupId>commons-dbcp</groupId>
   <artifactId>commons-dbcp</artifactId>
   <version>1.4</version>
 </dependency>

  2. 编写实体类Dept.java

     public class Dept implements Serializable{

 	private int deptno;
 	private String dname;
 	private String loc;
 	
 	//省略set和get方法
 }

  3. 编写DeptDao接口和JdbcDeptDao实现类

    DeptDao接口

     public interface DeptDao {

 	public List<Dept> selectAll();
 	
 }

    JdbcDeptDao实现类

     @Repository("deptDao")
 public class JdbcDeptDao implements DeptDao {
 	
 	@Autowired
 	private JdbcTemplate template;
 
 	public List<Dept> selectAll() {
 		String sql = "select * from dept";
 		RowMapper<Dept> rowMapper = new BeanPropertyRowMapper<Dept>(Dept.class);
 		List<Dept> list = template.query(sql, rowMapper);
 		return list;
 	}
 
 }

  4. 配置JdbcDeptDao、JdbcTemplate、dbcp连接池

     <bean id="dbcp" class="org.apache.commons.dbcp.BasicDataSource">
 	<property name="username" value="root"></property>
 	<property name="password" value="1234"></property>
 	<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
 	<property name="url" value="jdbc:mysql://localhost:3306/java13"></property>
 </bean>

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

  5. 测试DeptDao

ListAction

/list.action-->Filter控制器-->ListAction-->DeptDao-->Result-->/WEB-INF/list.jsp

  1. 编写Action,注入DeptDao

     @Controller
 public class ListAction {
 	
 	private List<Dept> depts;
 
 	@Autowired
 	private DeptDao deptDao;
 	
 	public String execute(){
 		depts = deptDao.selectAll();
 		return "success";
 	}
 	
 	
 	public List<Dept> getDepts() {
 		return depts;
 	}
 
 	public void setDepts(List<Dept> depts) {
 		this.depts = depts;
 	}
 
 }

  2. 在struts.xml中配置Action和Result

     <action name="list" class="listAction">
 	<result>/WEB-INF/list.jsp</result>
 </action>

案例：新增操作

/addDept.action-->Filter控制器-->AddAction -->DeptDao-->Result-->继续发出list.action请求

  1. 在DeptDao追加save方法

     public void save(Dept dept) {
 	String sql = "insert into dept (dname,loc) values (?,?)";
 	Object[] params = {dept.getDname(),dept.getLoc()};
 	template.update(sql,params);
 }

  2. 编写AddAction

     @Controller
 public class AddAction {
 	
 	private Dept dept;//对应dept.dname、dept.loc
 
 	@Autowired
 	private DeptDao deptDao;
 	
 	public String execute(){
 		deptDao.save(dept);
 		System.out.println(dept.getDname());
 		return "success";
 	}
 	
 	public Dept getDept() {
 		return dept;
 	}
 
 	public void setDept(Dept dept) {
 		this.dept = dept;
 	}
 }

  3. 配置Action和Result

     <action name="addDept" class="addAction">
 	<result name="success" type="redirectAction">
 		<param name="actionName">list</param>
 	</result>
 </action>

  4. 乱码解决方法

     <property name="url" value="jdbc:mysql://localhost:3306/java13?useUnicode=true&amp;characterEncoding=utf8"></property>