spring boot整合 freemarker 詳細教程

spring boot 咱們都知道是一個簡化配置的服務，省去繁瑣的xml配置，以properties和yml還有 註解形式來替代以前的xml配置。

咱們首先實現spring boot 對freemarker的支持，引入pom

<dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-freemarker</artifactId>
    </dependency>

在yml中添加配置項：

spring:
    freemarker:
        template-loader-path: classpath:/ftl/

classpath後面爲前綴。也能夠在註解配置類中實現

新建配置類：FreeMarkerConfig.java

import com.jagregory.shiro.freemarker.ShiroTags;
import freemarker.template.TemplateException;
import freemarker.template.TemplateModelException;
import java.io.IOException;
import java.util.Properties;
import javax.annotation.PostConstruct;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.ui.freemarker.FreeMarkerConfigurationFactory;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer;
import org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver;
/**
 * @author zhuxiaomeng
 * @date 2018/1/2.
 * @email 154040976@qq.com
 */
@Configuration
public class FreeMarkerConfig {


  @Bean
  public ViewResolver viewResolver() {
    FreeMarkerViewResolver resolver = new FreeMarkerViewResolver();
    resolver.setCache(false);
    resolver.setViewClass(org.springframework.web.servlet.view.freemarker.FreeMarkerView.class);
    resolver.setRequestContextAttribute("re");
    resolver.setExposeSpringMacroHelpers(true);
    resolver.setExposeRequestAttributes(true);
    resolver.setExposeSessionAttributes(true);
    resolver.setSuffix(".ftl");
    resolver.setContentType("text/html; charset=UTF-8");
    return resolver;
  }

  @Bean
  public FreeMarkerConfigurer freemarkerConfig() throws IOException, TemplateException {
    FreeMarkerConfigurationFactory factory = new FreeMarkerConfigurationFactory();
    factory.setTemplateLoaderPaths("classpath:/ftl/", "src/main/resources/ftl");
    factory.setDefaultEncoding("UTF-8");
    FreeMarkerConfigurer result = new FreeMarkerConfigurer();

    freemarker.template.Configuration configuration = factory.createConfiguration();
    configuration.setClassicCompatible(true);
    result.setConfiguration(configuration);
    Properties settings = new Properties();
    settings.put("template_update_delay", "0");
    settings.put("default_encoding", "UTF-8");
    settings.put("number_format", "0.##########");
    settings.put("datetime_format", "yyyy-MM-dd HH:mm:ss");
    settings.put("classic_compatible", true);
    settings.put("template_exception_handler", "ignore");
    result.setFreemarkerSettings(settings);
    return result;
  }

}

setRequestContextAttribute：設置屬性名稱，爲freemarker前端 RequestContext 的別名

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