Freemarker直接解析字符串获取转换结果

Posted 2023-01-09 svygh123

有时候我们需要直接转换模板字符串，而不是从数据文件读取

比如我要将$ClassName.java直接转换结果得到我的文件名Student.java

这时，需要StringTemplateLoader来辅助，具体代码如下：

import java.io.StringReader;
import java.io.StringWriter;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.lang3.StringUtils;

import freemarker.cache.StringTemplateLoader;
import freemarker.template.Configuration;
import freemarker.template.Template;

public class TestFreemarker 

	public static void main(String[] args) throws Exception 
		Map<String, Object> dataMap = new HashMap<String, Object>();
		dataMap.put("ClassName", "Student");
		String templateContent = "$ClassName.java";
		System.out.println(parseContent(templateContent, dataMap));
	

	public static String parseContent(String content, Map<String, Object> dataMap) 
		try 
			String tempName = StringUtils.left(content, 10);
			Configuration configuration = new Configuration(Configuration.VERSION_2_3_31);
			configuration.setNumberFormat("#");
			StringTemplateLoader stringLoader = new StringTemplateLoader();
			stringLoader.putTemplate(tempName, content);
			Template template = new Template(tempName, new StringReader(content), configuration);
			StringWriter stringWriter = new StringWriter();
			template.process(dataMap, stringWriter);
			content = stringWriter.toString();
		 catch (Exception e) 
			e.printStackTrace();
			throw new RuntimeException("模板解析失败");
		
		return content;
	

输出结果：

Student.java