FreeMarker一对多关系的输出

环境配置

jdk1.8
eclipse:Version: Oxygen.3a Release (4.7.3a)
freemarker

  org.freemarker
  freemarker
  2.3.28

两个model类
Fruit类

package com.test.freemarker;

import java.util.List;

/**
 * Fruit
 *
 * @author relieved-gao
 * @version 1.0
 * @date 2018-06-20 15:10
 */
public class Fruit   {
    private String name;

    private String desc;

    private List apples;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getDesc() {
        return desc;
    }

    public void setDesc(String desc) {
        this.desc = desc;
    }

    public List getApples() {
        return apples;
    }

    public void setApples(List apples) {
        this.apples = apples;
    }


}

Apple类

package com.test.freemarker;

/**
 * Fruit
 *
 * @author relieved-gao
 * @version 1.0
 * @date 2018-06-20 15:10
 */
public class Apple {
    private String name;

    private String desc;

    private String color;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getDesc() {
        return desc;
    }

    public void setDesc(String desc) {
        this.desc = desc;
    }

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }
}

模板位置放在D盘根目录，可以自己在测试类里面修改
test.ftl

• <#list fruit.apples as apple>
• ${apple.name}
• ${apple.desc}
• ${apple.color}

测试类

package com.test.freemarker;

import java.io.File;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.TemplateExceptionHandler;

public class Test {

    public static void main(String[] args) throws Exception {

        /* ------------------------------------------------------------------------ */
        /* You should do this ONLY ONCE in the whole application life-cycle:        */

        /* Create and adjust the configuration singleton */
        Configuration cfg = new Configuration(Configuration.VERSION_2_3_27);
        cfg.setDirectoryForTemplateLoading(new File("D://"));
        cfg.setDefaultEncoding("UTF-8");
        cfg.setTemplateExceptionHandler(TemplateExceptionHandler.RETHROW_HANDLER);
        cfg.setLogTemplateExceptions(false);
        cfg.setWrapUncheckedExceptions(true);

        /* ------------------------------------------------------------------------ */
        /* You usually do these for MULTIPLE TIMES in the application life-cycle:   */

        /* Create a data-model */
        Map root = new HashMap();
        List listFruits = new ArrayList();
        Fruit fruit = new Fruit();
        fruit.setName("水果");
        fruit.setDesc("描述");
        List list = new ArrayList();
        Apple a1 = new Apple();
        a1.setColor("red");
        a1.setName("红苹果");
        a1.setDesc("红苹果描述");
        Apple a2 = new Apple();
        a2.setColor("tsing");
        a2.setName("青苹果");
        a2.setDesc("青苹果描述");

        list.add(a1);
        list.add(a2);
        fruit.setApples(list);

        listFruits.add(fruit);
        root.put("fruits",listFruits);


        /* Get the template (uses cache internally) */
        Template temp = cfg.getTemplate("test.ftl");

        /* Merge data-model with template */
        Writer out = new OutputStreamWriter(System.out);
        temp.process(root, out);
        // Note: Depending on what `out` is, you may need to call `out.close()`.
        // This is usually the case for file output, but not for servlet output.
    }
}

输出结果

以上便是一对多的list嵌套的使用