230124_50_SpringBoot入门

• thymeleaf语法

• 1.th：utext，转义文本

  • controller

  model.addAttribute("msg","<h1>hello,springboot!</h1>");
  

  • html

  <div th:text="${msg}"></div>
  

  <div th:utext="${msg}"></div>
  

测试结果：

• 2.遍历数据
• controller

model.addAttribute("users", Arrays.asList("bill","tom"));

• html

<h1 th:each="user:${users}" th:text="${user}"></h1>

测试结果

• mvc配置原理

• 自定义配置类MyMvcConfig

package com.bill.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.View;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.util.Locale;

/**
 * @Auther: wangchunwen
 * @Date: 2023/1/24 - 01 - 24 - 20:39
 * @Description: com.bill.config
 * @version: 1.0
 */

// 如果需要一些定制化功能，只要写一个组件，然后将它交给springboot，springboot就会帮我们自动装配。
// 配置类，扩展springmvc
@Configuration
public class MyMvcConfig implements WebMvcConfigurer {

    // ViewResolver 实现了视图解析器接口的类，我们就可以把它看做视图解析器
    @Bean
    public ViewResolver myViewResolver(){
        return new MyViewName();
    }

    // 自定义一个自己的视图解析器myViewResolver
    public static class MyViewName implements ViewResolver {
        @Override
        public View resolveViewName(String s, Locale locale) throws Exception {
            return null;
        }
    }
}

• 扩展springmvc

• 自定义MyMvcConfig，视图跳转

package com.bill.config;


import org.springframework.context.annotation.Configuration;

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


/**
 * @Auther: wangchunwen
 * @Date: 2023/1/24 - 01 - 24 - 20:39
 * @Description: com.bill.config
 * @version: 1.0
 */

// 配置类，扩展springmvc
// 如果要扩展springmvc，自定义配置类
@Configuration
public class MyMvcConfig implements WebMvcConfigurer {

    @Override
    public void addViewControllers(ViewControllerRegistry registry) {

        registry.addViewController("/bill").setViewName("get");
    }
}

测试结果：