Spring boot进阶-配置Controller、interceptor...

1、配置SpringBootApplication(对spring boot来说这是最基本)

package io.github.syske.springboot31;

import org.springframework.boot.Banner;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.context.annotation.Configuration;

@Configuration

@SpringBootApplication

public class SpringBoot31Application {

    public static void main(String[] args) {

        //SpringApplication.run(SpringBoot31Application.class, args);

        SpringApplication application = new SpringApplication(SpringBoot31Application.class);

        //关闭banner，也可以通过在resouces文件夹下添加banner.txt替换banner，banner生成网站

        // http://patorjk.com/software/taag/#p=testall&h=0&f=Chiseled&t=syske

        application.setBannerMode(Banner.Mode.OFF);

        application.run(args);

    }

}

2、创建配置类

完整配置

package io.github.syske.springboot31.config;

import io.github.syske.springboot31.formatter.DateFomaters;

import io.github.syske.springboot31.interceptor.SessionInterceptor;

import org.springframework.context.annotation.Configuration;

import org.springframework.format.FormatterRegistry;

import org.springframework.web.servlet.config.annotation.InterceptorRegistry;

import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;

import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration

public class Webconfig implements WebMvcConfigurer {

    @Override

    public void addViewControllers(ViewControllerRegistry registry) {

        registry.addViewController("/user/login.html").setViewName("login");

    }

    @Override

    public void addInterceptors(InterceptorRegistry registry) {

        registry.addInterceptor(new SessionInterceptor())

                .addPathPatterns("/**")

                .excludePathPatterns("/login","/user/login.html","/bootsrap/**");

    }

    @Override

    public void addFormatters(FormatterRegistry registry) {

        //给当前的Spring容器中添加自定义格式转换器.

        registry.addConverter(new DateFomaters());

    }

}

3、配置Controller

controller是在配置类中添加的

主要是针对一些仅需要返回页面的Controller，如果需要model操作则不适用

 @Override

    public void addViewControllers(ViewControllerRegistry registry) {

        registry.addViewController("/user/login.html").setViewName("login");

    }

主要是通过addViewController方法进行添加，方法中传入的是访问的路径，上面配置的访问路径为：http://localhost:8080/user/login.html, setViewName方法设置的是返回的视图名，我的配置对应的是login.html
方法内可以配置多个视图模型

4、配置DateFomatters

自定义的convertor



package io.github.syske.springboot31.formatter;

import org.springframework.core.convert.converter.Converter;

import org.springframework.util.StringUtils;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Date;

public class DateFomaters implements Converter<String, Date> {

    @Override

    public Date convert(String source) {

        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");

        Date date = null;

        if(!StringUtils.isEmpty(source)) {

            try {

                date = dateFormat.parse(source);

            } catch (ParseException e) {

                e.printStackTrace();

            }

        }

        return date;

    }

}

将自定义的转化类添加到Spring boot配置中

  @Override

    public void addFormatters(FormatterRegistry registry) {

        //给当前的Spring容器中添加自定义格式转换器.

        registry.addConverter(new DateFomaters());

    }

5、配置拦截器（Interceptor）

自定义拦截器

package io.github.syske.springboot31.interceptor;

import org.springframework.web.servlet.mvc.WebContentInterceptor;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.IOException;

public class SessionInterceptor extends WebContentInterceptor {

    @Override

    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws ServletException {

        Object username = request.getSession().getAttribute("username");

        if(username != null) {

            return true;

        } else {

            try {

                request.getRequestDispatcher("/user/login.html").forward(request,response);

            } catch (IOException e) {

                e.printStackTrace();

            }

            return false;

        }

    }

}

将自定义的拦截器添加到Spring boot配置中

 @Override

    public void addInterceptors(InterceptorRegistry registry) {

        registry.addInterceptor(new SessionInterceptor())

                .addPathPatterns("/**")

                .excludePathPatterns("/login","/user/login.html","/bootsrap/**");

    }

6、测试

登录拦截测试，以及格式化打印

package io.github.syske.springboot31.controller;

import org.springframework.stereotype.Controller;

import org.springframework.util.StringUtils;

import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpSession;

import java.util.Date;

@Controller

public class LoginController {

    @RequestMapping("/login")

    public String login(String username, Date logindate, HttpSession session) {

        if(!StringUtils.isEmpty(username)) {

            session.setAttribute("username", username);

            System.out.println(logindate);

            return "index";

        }

        return "login";

    }

}

巴特西

Spring boot进阶-配置Controller、interceptor...

1、配置SpringBootApplication(对spring boot来说这是最基本)

2、创建配置类

3、配置Controller

4、配置DateFomatters

5、配置拦截器（Interceptor）

6、测试

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