庚子鼠年 戊寅月 丁酉日
描述
springboot练习
随笔
thymeleaf学习
MVC配置原理
国际化
Spring 5.0后，WebMvcConfigurerAdapter被废弃，取代的方法有两种：
①implements WebMvcConfigurer（官方推荐）
②extends WebMvcConfigurationSupport
总结博客： https://blog.csdn.net/qq_40674583/article/details/104477435
拦截器
1. 实现拦截器接口 HandlerInterceptor
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@Component
public class LoginHandlerInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println("拦截器！！！");
String a = request.getParameter("a");
// return !StringUtils.isEmpty(a) && "123".equals(a);
return true;
}
}
2. 配置
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.LocaleResolver;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
public class MyMvcConfig implements WebMvcConfigurer {
@Autowired
LoginHandlerInterceptor loginHandlerInterceptor;
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(loginHandlerInterceptor).addPathPatterns("/hello");
}
}
404处理
1. 在static项目新建文件夹error
2. 编写404.html 和 500.html
3. 配置文件过滤
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry
.addResourceHandler("/**")
.addResourceLocations("classpath:/static/");
}
自定义异常处理
技术博客：https://blog.csdn.net/qq_40674583/article/details/104484838
自定义类型转换器
技术博客：https://blog.csdn.net/qq_40674583/article/details/104486783