这篇文章将为大家详细讲解有关string boot与自定义interceptor的示例分析，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。
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一. 拦截器的执行顺序
1. 目录
2. 拦截器
拦截器里面, 我加了三个(First,Two,Third), 但是内容都差不多.
package org.elvin.boot.interceptor;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class FirstInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
System.out.println("FirstInterceptor preHandle");
return true;
}
@Override
public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
System.out.println("FirstInterceptor postHandle");
}
@Override
public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
System.out.println("FirstInterceptor afterCompletion");
}
}preHandle 返回true, 才会继续下面的执行.
拦截器注册:
package org.elvin.boot.interceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
@Configuration
public class RegisterInterceptor extends WebMvcConfigurerAdapter {
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(new FirstInterceptor());
registry.addInterceptor(new TwoInterceptor());
registry.addInterceptor(new ThirdInterceptor());
super.addInterceptors(registry);
}
}为了验证执行顺序, 这里使用了 thymeleaf, 然后在前台访问了我后台传过去的属性, 在访问的时候, 就会打印信息到控制台
package org.elvin.boot.pojo;
public class Book {
private String name ;
public String getName() {
System.out.println("view : Book'name is " + name);
return name;
}
public void setName(String name) {
this.name = name;
}
}Controller:
package org.elvin.boot.Controller;
import org.elvin.boot.pojo.Book;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping("first")
public class FirstController {
private String controllerPath = "first/";
@GetMapping("index")
public String index(Model model){
System.out.println("controller : FirstController index doing...");
Book book = new Book();
book.setName("spring boot");
model.addAttribute("book", book);
return controllerPath + "index";
}
}View: