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

心已赠人 2023-10-18 16:52 125阅读 0赞

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：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70][]

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>
    		
    		<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：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pob3V6aGl3ZW5nYW5n_size_16_color_FFFFFF_t_70 1][]

@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");
    			});
    		}

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