Spring框架的练习
注解
1.导入jar包
2.创建advice，service，servlet包
3.创建并书写BookService接口及实现类
//接口
package com.gao.service;
public interface BookService {
void read();
void listen();
void write();
void remember();
}
//实现类
package com.gao.service.impl;
import com.gao.service.BookService;
import org.springframework.stereotype.Service;
@Service
public class BookServiceImpl implements BookService {
@Override
public void read() {
System.out.println("好好学习天天向上");
}
@Override
public void listen() {
System.out.println("天天向上好好学习");
}
@Override
public void write() {
System.out.println("天天学习好好向上");
}
@Override
public void remember() {
System.out.println("好好向上天天学习");
}
}
4.创建并书写增强类
package com.gao.advice;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.stereotype.Component;
@Component
@Aspect
public class Student {
@Before("execution(* *..BookService.*(..))")
public void before(){
System.out.println("前置通知。。。。。before");
}
@AfterReturning("execution(* *..BookService.*(..))")
public void afterReturn(){
System.out.println("后置通知。。。。。afterReturn");
}
@AfterThrowing("execution(* *..BookService.*(..))")
public void afterThrow(){
System.out.println("异常通知。。。。。afterThrow");
}
@After("execution(* *..BookService.*(..))")
public void after(){
System.out.println("最终通知。。。。。after");
}
}
5.配置xml文件
6.测试类
package com.gao.servlet;
import com.gao.service.BookService;
import org.junit.Test;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class TestServlet {
@Test
public static void main(String[] args) {
ClassPathXmlApplicationContext context=new ClassPathXmlApplicationContext("spring.xml");
BookService bookService = context.getBean(BookService.class);
bookService.read();
System.out.println("我是分割线~~~~~~~~~");
bookService.listen();
System.out.println("我是分割线~~~~~~~~~");
bookService.remember();
System.out.println("我是分割线~~~~~~~~~");
bookService.write();
}
}
8.运行结果
环绕通知
1.导入jar包
2.创建advice，service，servlet包
3.创建并书写BookService接口及实现类
package com.gao.service;
public interface BookService {
void read();
void lision();
void write();
void renumber();
}
package com.gao.service.impl;
import com.gao.service.BookService;
public class BookServiceImpl implements BookService {
@Override
public void read() {
System.out.println("好好学习天天向上");
}
@Override
public void lision() {
System.out.println("天天向上好好学习");
}
@Override
public void write() {
System.out.println("天天学习好好向上");
}
@Override
public void renumber() {
System.out.println("好好向上天天学习");
}
}
4.创建并书写增强类
package com.gao.advice;
import org.aspectj.lang.ProceedingJoinPoint;
public class Student {
public void before(){
System.out.println("前置通知。。。。。before");
}
public void afterReturn(){
System.out.println("后置通知。。。。。afterReturn");
}
public void afterThrow(){
System.out.println("异常通知。。。。。afterThrow");
}
public void after(){
System.out.println("最终通知。。。。。after");
}
public Object around(ProceedingJoinPoint pjp){
try {
//前置增强
System.out.println("环绕通知-----前置增强");
//通过ProceedingJoinPoint完成代理对象的方法调用
Object result=null;
Object[] args = pjp.getArgs();
result=pjp.proceed(args);
//后置增强
System.out.println("环绕通知-----后置增强");
return result;
} catch (Throwable e) {
System.out.println("环绕通知-----异常增强");
throw new RuntimeException(e);
} finally {
System.out.println("环绕通知-----最终增强");
}
}
}
5.配置xml文件
6.测试类
package com.gao.servlet;
import com.gao.service.BookService;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class TestServlet {
public static void main(String[] args) {
ClassPathXmlApplicationContext context=new ClassPathXmlApplicationContext("spring.xml");
BookService bookService = context.getBean(BookService.class);
bookService.read();
System.out.println("我是分割线~~~~~~~~~");
bookService.lision();
System.out.println("我是分割线~~~~~~~~~");
bookService.renumber();
System.out.println("我是分割线~~~~~~~~~");
bookService.write();
}
}
7.运行结果
纯注解
1.导入jar包
2.创建config，service，servlet和advice包
3.创建并书写BookService接口及实现类
//接口
package com.gao.service;
public interface BookService {
void listen();
void read();
void speak();
void write();
}
//实现类
package com.gao.service.impl;
import com.gao.service.BookService;
import org.springframework.stereotype.Service;
@Service
public class BookServiceImpl implements BookService {
@Override
public void listen() {
System.out.println("听");
}
@Override
public void read() {
System.out.println("读");
}
@Override
public void speak() {
System.out.println("说");
}
@Override
public void write() {
System.out.println("写");
}
}
4.创建并书写增强类
package com.gao.advice;
import org.aspectj.lang.annotation.*;
import org.springframework.stereotype.Component;
@Component
@Aspect
public class Student {
@Before("execution(* *..BookService.*(..))")
public void before(){
System.out.println("前置通知。。。。。before");
}
@AfterReturning("execution(* *..BookService.*(..))")
public void afterReturn(){
System.out.println("后置通知。。。。。afterReturn");
}
@AfterThrowing("execution(* *..BookService.*(..))")
public void afterThrow(){
System.out.println("异常通知。。。。。afterThrow");
}
@After("execution(* *..BookService.*(..))")
public void after(){
System.out.println("最终通知。。。。。after");
}
}
5.创建并书写springconfig类
package com.gao.config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;
@Configuration
@ComponentScan("com.gao")
@EnableAspectJAutoProxy
public class SpringConfig {
}
6.测试类
package com.gao.servlet;
import com.gao.config.SpringConfig;
import com.gao.service.BookService;
import org.junit.Test;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
public class TestServlet {
@Test
public void test01(){
AnnotationConfigApplicationContext context=new AnnotationConfigApplicationContext(SpringConfig.class);
BookService bookService = context.getBean(BookService.class);
bookService.write();
System.out.println("我是分割线~~~~~~~~~");
bookService.read();
System.out.println("我是分割线~~~~~~~~~");
bookService.listen();
System.out.println("我是分割线~~~~~~~~~");
bookService.speak();
}
}
7.运行结果
