Mybatis Plugin原理解析学习笔记

1. 编写业务接口及实现类

public interface IHello {
    
    
  void hello(String name) ;
}

class HelloImpl implements IHello{
    
    
  public void hello(String name){
    
    
    System.out.println("hello world : " + name);
  }
}

2. 编写拦截器类

@Intercepts({
    
    
  @Signature(type = IHello.class, method = "hello", args = {
    
    String.class}),
})
class MyInterceptor implements Interceptor{
    
    
  @Override
  public Object intercept(Invocation invocation) throws Throwable {
    
    
    System.out.println("-------------");
    return invocation.proceed();
  }
}

3. 编写单元测试

public class PluginsTest {
    
    
  @Test
  public void test1(){
    
    
    InterceptorChain interceptorChain = new InterceptorChain() ;
    interceptorChain.addInterceptor(new MyInterceptor());

    IHello hello = (IHello)interceptorChain.pluginAll(new HelloImpl());
    hello.hello("yicj");
  }
}
// 输出
//-------------
//hello world : yicj