pom.xml

<!-- springboot web開發相關jar包的引入 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- springboot整合jps的jar包匯入 -->
        <!-- tomcat jsp編譯器的支援 -->
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <!--<scope>provided</scope> -->
        </dependency>
        <!-- jstl標籤庫 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>

        <!-- 引入freeMarker的依賴包. -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-freemarker</artifactId>
        </dependency>
 

package com.zxs;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.context.annotation.Bean;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver;

@SpringBootApplication
@ServletComponentScan //在spring啟動的時候掃描@WebServlet註解,並例項化.
@MapperScan("com.zxs.mapper") //掃描mapper類生成代理物件
public class App {
    
    public static void main(String[] args) {
        SpringApplication.run(App.class, args);
    }

    //同時支援jsp和freemaker
    /**
     * 新增對jsp支援
     *
     * @return
     */
    @Bean
    public ViewResolver getJspViewResolver() {
        InternalResourceViewResolver internalResourceViewResolver = new InternalResourceViewResolver();
        internalResourceViewResolver.setPrefix("/WEB-INF/jsp/");
        internalResourceViewResolver.setSuffix(".jsp");
        internalResourceViewResolver.setOrder(1);
        return internalResourceViewResolver;
    }

    /**
     * 新增對Freemarker支援
     *
     * @return
     */
    @Bean
    public FreeMarkerViewResolver getFreeMarkerViewResolver() {
        FreeMarkerViewResolver freeMarkerViewResolver = new FreeMarkerViewResolver();
        freeMarkerViewResolver.setCache(false);
        freeMarkerViewResolver.setPrefix("");
        freeMarkerViewResolver.setSuffix(".html");
        freeMarkerViewResolver.setRequestContextAttribute("request");
        freeMarkerViewResolver.setOrder(0);
        freeMarkerViewResolver.setContentType("text/html;charset=UTF-8");

        return freeMarkerViewResolver;

    }
}