SpingBoot +JavaMail + FreeMarker 模板邮件发送功能

1、邮件模板数据库结构设计：

DROP TABLE IF EXISTS `email`; 
CREATE TABLE `email`  ( 
  `id` int(10) NOT NULL AUTO_INCREMENT, 
  `paramter` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL, 
  `context` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL, 
  `name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL, 
  PRIMARY KEY (`id`) USING BTREE 
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic; 
 
-- ---------------------------- 
-- Records of email 
-- ---------------------------- 
INSERT INTO `email` VALUES (1, 'name,money,point', '您好${name}，晚上好！您目前余额：${money?string(r\"#.##r\")}元，积分：${point}', 'emailtemplate');

2、SpringBoot 模板封装结构图：

3、核心代码：

pom.xml 文件

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> 
	<modelVersion>4.0.0</modelVersion> 
	<parent> 
		<groupId>com.zzg</groupId> 
		<artifactId>mysql-boot</artifactId> 
		<version>0.0.1-SNAPSHOT</version> 
	</parent> 
	<artifactId>mysql-boot-template</artifactId> 
	<dependencies> 
		<!--freemarker模板引擎 --> 
		<dependency> 
			<groupId>org.springframework.boot</groupId> 
			<artifactId>spring-boot-starter-freemarker</artifactId> 
		</dependency> 
	</dependencies> 
</project>

java代码：

package com.zzg.freemarker.util; 
 
import java.io.StringWriter; 
import java.util.Map; 
import org.slf4j.Logger; 
import org.slf4j.LoggerFactory; 
import freemarker.cache.StringTemplateLoader; 
import freemarker.template.Configuration; 
import freemarker.template.Template; 
 
/** 
 *  
 * @ClassName:  FreeMarkerUtil    
 * @Description: freemarker 工具类    
 * @author: **** -zzg 
 * @date:   2019年4月10日 下午2:17:56    
 *      
 * @Copyright: 2019 www.digipower.cn  
 * 注意：本内容仅限于****开发有限公司内部使用，禁止用于其他的商业目的 
 */ 
public class FreeMarkerUtil { 
	 
	// 引入日志 
	private final static Logger logger = LoggerFactory.getLogger(FreeMarkerUtil.class); 
	 
	public static String transform(Map map, String context){ 
		try { 
			//定义StringTemplateLoader 
			StringTemplateLoader loader = new StringTemplateLoader(); 
			loader.putTemplate("template", context); 
			 
			//定义Configuration 
			Configuration configuration = new Configuration(Configuration.DEFAULT_INCOMPATIBLE_IMPROVEMENTS); 
			configuration.setTemplateLoader(loader); 
			 
			//定义Template 
			Template tpl = configuration.getTemplate("template"); 
			 
			StringWriter writer = new StringWriter(); 
			tpl.process(map, writer); 
			return writer.toString(); 
		} catch (Exception e) { 
			logger.error(e.getMessage()); 
			return null; 
		} 
	} 
 
} 

4、模板邮件功能测试：

@RequestMapping(value="/sendTemplate", method=RequestMethod.GET) 
	@ResponseBody 
	public void sendTemplate(){ 
		List<Email> list = service.getEmails(); 
		if(list != null && list.size() > 0){ 
			list.stream().forEach(item ->{ 
				// 简单文本邮件发送 
				EmailBean text = new EmailBean(); 
				text.setFrom("zhouzhiwengang@163.com"); 
				text.setTo("zhouzhigang@digipower.cn"); 
				text.setSubject("邮件模板发送"); 
				 
				Map<String,Object> parameter = new HashMap<String,Object>(); 
				parameter.put("name", "周志刚"); 
				parameter.put("money", 1000089.155); 
				parameter.put("point", 16568); 
				 
				try { 
					// 声明模板和模板参数写入(核心代码) 
					String context = FreeMarkerUtil.transform(parameter, item.getContext()); 
					if(StringUtils.isEmpty(context)){ 
						// 判断freemarker 模板解析是否正确解析 
						logger.error("freemarker 模板解析错误"); 
						return; 
					} 
					text.setText(context); 
				} catch (Exception e) { 
					// TODO Auto-generated catch block 
					e.printStackTrace(); 
				} 
				 
				text.setType(Integer.valueOf(1)); 
				util.send(text); 
				logger.error("HTML邮件发送成功"); 
			}); 
		}