Java编程中spring boot项目动态添加拦截器Interceptor
1.自定义一个接口继承HandlerInterceptor接口
3.自己定义一个拦截器类,实现上面自己自定义的拦截接口
1.自定义一个接口继承HandlerInterceptor接口
import org.springframework.web.servlet.HandlerInterceptor;
/**
* url 拦截器
*
* @author leftso
*
*/
public interface UrlInterceptor extends HandlerInterceptor {
String[] pathPatterns();
}
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
/**
* 添加自定义的拦截器
*
* @author
*
*/
@Configuration
public class MyMvcConfigurerAdapter extends WebMvcConfigurerAdapter {
@Autowired
SpringUtils springUtils;
@Override
public void addInterceptors(InterceptorRegistry registry) {
super.addInterceptors(registry);
@SuppressWarnings("static-access")
Map<String, UrlInterceptor> urlInterceptors = springUtils.applicationContext
.getBeansOfType(UrlInterceptor.class);
Set<String> keys = urlInterceptors.keySet();
Iterator<String> it = keys.iterator();
while (it.hasNext()) {
String key = it.next();
UrlInterceptor urlInterceptor=urlInterceptors.get(key);
registry.addInterceptor(urlInterceptor).addPathPatterns(urlInterceptor.pathPatterns());
}
}
}
3.自己定义一个拦截器类,实现上面自己自定义的拦截接口
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.ModelAndView;
@Component
public class MyInterceptor implements UrlInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
System.out.println("Before....");
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
ModelAndView modelAndView) throws Exception {
System.out.println("Doing....");
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
throws Exception {
System.out.println("After....");
}
@Override
public String[] pathPatterns() {
return new String[] { "/**" };
}
}
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