ftl模板之code-generator

电玩女神 2023-10-13 21:48 13阅读 0赞

## 《ftl模板之code-generator》 ##

#### 一、maven坐标 ####

<dependency>
        <groupId>org.freemarker</groupId>
        <artifactId>freemarker</artifactId>
        <version>2.3.31</version> 
    </dependency>
     <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
     </dependency>

#### 二、创建ftl模板 ####

> \{resource目录下，创建templates文件夹、里面存放模板\}

#### 三、Java实体类生成案例 ####

> entity\_template.ftl 模板内容

import lombok.Data;
    
    @Data
    public class ${className} {
    <#list properties as property>
        private ${property.type} ${property.name};
    </#list>
    }

> 生成器代码如下

import freemarker.template.Configuration;
    import freemarker.template.Template;
    import freemarker.template.TemplateException;
    import lombok.AllArgsConstructor;
    import lombok.Data;
    import lombok.NoArgsConstructor;
    import java.io.IOException;
    import java.io.StringWriter;
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    public class CodeGenerator {
    
        public static void main(String[] args) throws IOException, TemplateException {
            // 准备数据模型
            Map<String, Object> dataModel = new HashMap<>();
            dataModel.put("className", "Person");
    
            List<Property> properties = new ArrayList<>();
            properties.add(new Property("String", "name"));
            properties.add(new Property("int", "age"));
            properties.add(new Property("String", "email"));
    
            dataModel.put("properties", properties);
    
            // 加载FTL模板
            Configuration configuration = new Configuration(Configuration.VERSION_2_3_31);
            configuration.setClassLoaderForTemplateLoading(CodeGenerator.class.getClassLoader(), "templates");
            Template template = configuration.getTemplate("entity_template.ftl");
    
            // 将数据模型和FTL模板合并生成Java实体类代码
            StringWriter stringWriter = new StringWriter();
            template.process(dataModel, stringWriter);
    
            // 输出生成的Java实体类代码
            System.out.println(stringWriter.toString());
        }
    
        @Data
        @AllArgsConstructor
        @NoArgsConstructor
        public static class Property {
            private String type;
            private String name;
        }
    
    }

#### 四、效果如下 ####

### ![在这里插入图片描述][15707eb25b6449c78923135d5167511d.png] ###

ftl模板，可以高度自定义生成代码…。如html、vue、Java等。\{看一下ftl语法即可\}

[15707eb25b6449c78923135d5167511d.png]: https://img-blog.csdnimg.cn/15707eb25b6449c78923135d5167511d.png