# 学习视频

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# 引入依赖

<dependency>
            <groupId>org.freemarker</groupId>
            <artifactId>freemarker</artifactId>
            <version>2.3.23</version>
        </dependency>
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# 定义模板

<#--package ${classPath};-->

public class ${className} {

private Integer ${Id};
private String ${userName};
private String ${password};


public Integer get${Id}(){
return ${Id};
}

public void set${Id}(Integer ${Id}){

this.${Id}=${Id};
}

public String get${userName}(){
return ${userName};
}

public void set${userName}(String ${userName}){
this.${userName}=${userName};

}

public String get${password}(){
return ${password};
}

public void set${password}(String ${password}){
this.${password}=${password};
}

}
<#list list as l>
    <#if l=="1">
        ${l}
    </#if>
</#list>
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# 实现代码

import freemarker.template.Configuration;
import freemarker.template.Template;
import java.io.*;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.junit.Test;

/**
 * @author liuhuan
 * @title: ftpDemo
 * @description: TODO
 * @projectName BHGService
 * @date 2021/6/222:42 下午
 * @return V1.0.0
 */
public class ftlDemo {
    private static final String TEMPLATE_PATH = "/Users/liuhuan/个人文档/JavaSourceCode/高超项目/BHGService/src/test/java";
    private static final String CLASS_PATH = "/Users/liuhuan/个人文档/JavaSourceCode/高超项目/BHGService/src/test/java";
    @Test
    public void demo(){
// step1 创建freeMarker配置实例
        Configuration configuration = new Configuration();
        Writer out = null;
        try {
            // step2 获取模版路径
            configuration.setDirectoryForTemplateLoading(new File (TEMPLATE_PATH));
            // step3 创建数据模型
            Map<String, Object> dataMap = new HashMap<String, Object> ();
            dataMap.put("classPath", "com.chen.www.chendemo");
            dataMap.put("className", "User");
            dataMap.put("Id", "Id");
            dataMap.put("userName", "userName");
            dataMap.put("password","password");

            List<String> list = new ArrayList<>();
            list.add ("1");
            list.add ("2");
            dataMap.put ("list", list);


            // step4 加载模版文件
            Template template = configuration.getTemplate("demo.ftl");
            // step5 生成数据
            File docFile = new File(CLASS_PATH+"/User.java");
            out = new BufferedWriter (new OutputStreamWriter (new FileOutputStream (docFile)));
            // step6 输出文件
            template.process(dataMap, out);

            System.out.println("文件创建成功 !");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (null != out) {
                    out.flush();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
    }
}
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# list循环

List<String> list = new ArrayList<>();
            list.add ("1");
            list.add ("2");
            dataMap.put ("list", list);
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<#list list as l>
    <#if l=="1">
        ${l}
    </#if>
</#list>
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