标签：http io ar 使用 java sp 文件 on log
个人感觉还是这种方式配置方式最灵活了。
package com.baobaotao.conf;
public class LogDao {
public void print(){
System.out.println("helloworld");
}
}
package com.baobaotao.conf;
public class UserDao {
public void print(){
System.out.println("Helloworld");
}
}
package com.baobaotao.conf;
public class LogonService {
public UserDao userDao;
public LogDao logDao;
public void setLogDao(LogDao logDao) {
this.logDao = logDao;
}
public void setUserDao(UserDao userDao) {
this.userDao = userDao;
}
public void print() {
System.out.println("helloworld");
}
}
先定义上面3个类。然后我们来测试。
package com.baobaotao.conf;
import org.springframework.beans.factory.annotation.Configurable;
import org.springframework.context.annotation.Bean;
@Configurable
public class AppConf {
// 以下两个方法定义了两个Bean，并提供了Bean的实例化逻辑
@Bean
public UserDao userDao() {
return new UserDao();
}
@Bean
public LogDao logDao() {
return new LogDao();
}
// 定义了logonService的Bean
@Bean
public LogonService logonService() {
LogonService logonService = new LogonService();
// 将上面定义的Bean注入到logonService Bean中
logonService.setLogDao(logDao());
logonService.setUserDao(userDao());
return logonService;
}
}
测试类。
package com.baobaotao.conf;
import org.junit.Test;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
public class ConfigTest {
@Test
public void test(){
AnnotationConfigApplicationContext ac = new AnnotationConfigApplicationContext(AppConf.class);
LogonService logonService = ac.getBean(LogonService.class);
logonService.print();
}
}
如果bean在多个@Configuration中定义。
package com.baobaotao.conf;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class DaoConfig {
@Bean
public UserDao userDao(){
return new UserDao();
}
@Bean
public LogDao logDao(){
return new LogDao();
}
}
package com.baobaotao.conf;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
@Configuration
public class ServiceConfig {
//想普通Bean一样注入DaoConfig
@Autowired
private DaoConfig daoConfig;
@Bean
public LogonService logonService(){
LogonService logonService = new LogonService();
//像普通Bean一样，调用Bean相关的方法
logonService.setLogDao(daoConfig.logDao());
logonService.setUserDao(daoConfig.userDao());
return logonService;
}
}
因为@Configuration是通过@Component进行元注解的，所以意味着通过@Configuration注解的类，可以被Spring的<context:component-scan>扫描到。故可以使用@Autowired进行自动装配。
xml配置文件
<?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:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:p="http://www.springframework.org/schema/p" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <context:component-scan base-package="com.baobaotao.conf" /> </beans>
测试类。
package com.baobaotao.conf;
import org.junit.Test;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class ConfigTest {
@Test
public void test() {
ClassPathXmlApplicationContext ac = new ClassPathXmlApplicationContext(
"com/baobaotao/conf/bean.xml");
LogonService logonService = ac.getBean(LogonService.class);
logonService.print();
}
}
通过component 扫描之后，使用@Configuration注解的类已经被组装到了xml文件中，所以可以使用应用程序上下文去得到这个bean。
通过configuration配置类引入xml配置文件
package com.baobaotao.conf;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.ImportResource;
//通过@ImportResourcce引入XML配置文件
@Configuration
@ImportResource("classpath:com/baobaotao/conf/bean2.xml")
public class LogonAppConfig {
//自动注入XML文件中定义的Bean
@Bean
@Autowired
public LogonService logonService(UserDao userDao, LogDao logDao){
LogonService logonService = new LogonService();
logonService.setUserDao(userDao);
logonService.setLogDao(logDao);
return logonService;
}
}
引用的xml配置文件
<?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:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:p="http://www.springframework.org/schema/p" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <bean id="userDao" class="com.baobaotao.conf.UserDao"/> <bean id="logDao" class="com.baobaotao.conf.LogDao"/> </beans>
测试类。
package com.baobaotao.conf;
import org.junit.Test;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class ConfigTest {
@Test
public void test() {
ClassPathXmlApplicationContext ac = new ClassPathXmlApplicationContext(
"com/baobaotao/conf/bean.xml");
LogonService logonService = ac.getBean(LogonService.class);
logonService.print();
}
}标签：http io ar 使用 java sp 文件 on log
原文地址：http://my.oschina.net/firebroo/blog/340020
