freemarker生成word模板

生成word模板的时候，可能会在一个map中包含多个list，list中又嵌套map。参考了一些做法，记录下来以便以后使用。

一、 生成模板的工具类

public class DocumentHandler {
	
	private Configuration configuration = null;
	
	//推荐初始化加载模板使用单例模式
	public DocumentHandler() {
		configuration = new Configuration();
		configuration.setDefaultEncoding("UTF-8");
	}
 
	/**
	 * 
	 * @param dir 模板加载路径
	 * @param tempName 模板名称
	 * @param savePath  文件保存的路径、文件名
	 * @param sDate 数据集
	 */
	public void createDoc(String dir, String tempName, String savePath, Map<String, Object> sDate) {
		Template template = null;
		// 文件保存位置
		File outFile = new File(savePath);
		Writer out = null;
		try {
			// 设置模板加载路径
			configuration.setDirectoryForTemplateLoading(new File(dir));
			// 异常控制
			configuration.setTemplateExceptionHandler(TemplateExceptionHandler.IGNORE_HANDLER);
			// 加载模板
			template = configuration.getTemplate(tempName);
			//生成文件的路径及文件名
			FileOutputStream fileOutputStream = new FileOutputStream(outFile);
			OutputStreamWriter outputStreamWriter = new OutputStreamWriter(fileOutputStream, "utf-8");
			BufferedWriter bufferedWriter = new BufferedWriter(outputStreamWriter);
			out =bufferedWriter;
			// 合并模板和数据
			template.process(sDate, out);
			out.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

二、 生成数据模板
两种list、map的嵌套方式

1. map中包含一个list

public class Test1 {
	public static void main(String[] args) {
		Map<String, Object> map = new HashMap<>();
		map = getData();
		DocumentHandler documentHandler = new DocumentHandler();
//		String dir = "C:/Users/2018/Desktop/testFolder/";
		String fileName = "新的测试.ftl";
		String savePath = dir+"aaaaa.doc";
		documentHandler.createDoc(dir, fileName, savePath, map);
	}

	public static Map<String, Object> getData(){
		Map<String, Object> allMap = new HashMap<>();
		//1.学校名称
		allMap.put("school", "̫太阳花小学");
		//2.班级信息
		List<Map<String,Object>> classList = new ArrayList<>();
		//一班
		Map<String, Object> class_1 = new HashMap<>();
		class_1.put("className", "一班");
		//学生
		List<Map<String,Object>> studentList_1 = new ArrayList<>();
		for (int i=0; i<3; i++) {
			Map<String, Object> student = new HashMap<>();
			student.put("number", "000"+i);
			student.put("name", "学生"+i+"号");
			studentList_1.add(student);
		}
		class_1.put("list", studentList_1);
		classList.add(class_1);
		//二班
		Map<String, Object> class_2 = new HashMap<>();
		class_2.put("className", "二班");
		//学生
		List<Map<String,Object>> studentList_2 = new ArrayList<>();
		for (int i=0; i<3; i++) {
			Map<String, Object> student = new HashMap<>();
			student.put("number", "000"+i);
			student.put("name", "学生"+i+"号");
			studentList_2.add(student);
		}
		class_2.put("list", studentList_2);
		classList.add(class_2);
		allMap.put("allList", classList);
		return allMap;
	}
}

模板1：

 学校:${school} 
<#list allList as middleMap>
  <#list middleMap?keys as itemKey>
    <#if itemKey="className"> 
      班级:${middleMap[itemKey]} 
    </#if> 
    <#if itemKey="list">
       <#list middleMap[itemKey] as middleMap>
          ${middleMap.name}
       </#list>
    </#if> 
  </#list>
</#list>

效果

2.map中包含多个list

public class Test2 {

	public static void main(String[] args) {
		Map<String, Object> map = new HashMap<>();
		map = getData();
		DocumentHandler documentHandler = new DocumentHandler();
//		String dir = "C:/Users/2018/Desktop/testFolder/";
		String dir = "E:/workspaces/yctp/test/src/com/freemarkerDemo/test2/";
		String fileName = "新的测试.ftl";
		String savePath = dir+"aaaaa.doc";
		documentHandler.createDoc(dir, fileName, savePath, map)；
	}
	
	//组装数据模板
	public static Map<String, Object> getData(){
		Map<String, Object> allMap = new HashMap<>();
		//1.学校
		allMap.put("school", "太阳花小学");
		//2.班级信息集合
		List<Map<String,Object>> classList = new ArrayList<>();
		//一班信息
		Map<String, Object> class_1 = new HashMap<>();
		class_1.put("className", "No.1 Class");
		//一班学生
		List<Map<String,Object>> nan_student1 = new ArrayList<>();
		for (int i=0; i<3; i++) {
			Map<String, Object> student = new HashMap<>();
			student.put("number", "男000"+i);
			student.put("name", "男学生"+i+"号");
			nan_student1.add(student);
		}
		class_1.put("nanList", nan_student1);
		List<Map<String,Object>> nv_student1 = new ArrayList<>();
		for (int i=0; i<3; i++) {
			Map<String, Object> student = new HashMap<>();
			student.put("number", "女000"+i);
			student.put("name", "女学生"+i+"号");
			nv_student1.add(student);
		}
		class_1.put("nvList", nv_student1);
		classList.add(class_1);
		allMap.put("allList", classList);
		String json = JSON.toJSONString(allMap);
		System.out.println(json);
		return allMap;
	}
}

模板2：

${school}
<#list allList as middleMap>
  <#list middleMap?keys as itemKey>
    <#if itemKey="className"> 
      	班级:${middleMap[itemKey]} 
    </#if> 
  </#list>
  <#list middleMap?keys as itemKey>
    <#if itemKey="nanList">
       <#list middleMap[itemKey] as middleMap>
          	编号：${middleMap.number} 姓名：${middleMap.name}
       </#list>
    </#if> 
	<#if itemKey="nvList">
       <#list middleMap[itemKey] as middleMap>
          	编号：${middleMap.number} 姓名：${middleMap.name}
          	<!-- 例子的位置  -->
       </#list>
    </#if> 
  </#list>
</#list>

效果

如果在list中还包含map，可以根据key获取这个list，然后获取获取map中key的就可以了。这段代码可以放在 模板2 中的 例子的位置 进行测试。
例子：

<#list middleMap["list"] as unitMap>
	输出:${key}
</#listp>

参考：
https://blog.youkuaiyun.com/qq_34538575/article/details/79256195