SpringBoot+FreeMarker 学习（二）利用FreeMarker导出文件

柔光的暖阳◎ 2024-04-03 11:51 64阅读 0赞

FreeMarker的maven引用及application配置见第一篇教程

[SpringBoot+FreeMarker 学习（一）初识FreeMarker][SpringBoot_FreeMarker _FreeMarker]

在resources/templates中创建模板文件file.ftl

package ${classPath};
    
    public class ${className} {
    
        public static void main(String[] args) {
            System.out.println("${helloWorld}");
        }
    
    }

创建FileController，写生成文件接口

@RestController
    @RequestMapping(value = "/file")
    public class FileController {
    
        @Resource
        private Configuration configuration;
    
        @GetMapping("/export")
        public String export() {
            try {
                Map<String, Object> export = new HashMap<>();
                export.put("classPath", "com.by.test");
                export.put("className", "ExportTest");
                export.put("helloWorld", "Hello World!");
                Template template = configuration.getTemplate("file.ftl");
                File file = new File("ExportTest.java");
                Writer out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file), StandardCharsets.UTF_8));
                template.process(export, out);
                out.close();
            } catch (IOException | TemplateException e) {
                e.printStackTrace();
                return "生成失败";
            }
    
            return "生成成功";
        }
    
    }

启动项目，访问 [http://127.0.0.1:8080/file/export][http_127.0.0.1_8080_file_export]

页面显示

![8500c1da7e9c4703b015b2e7fe5b30a4.png][]

则在项目根目录中生成了一个名称为ExportTest.java的java文件，内容如下

package com.by.test;
    
    public class ExportTest {
    
        public static void main(String[] args) {
            System.out.println("Hello World!");
        }
    
    }

生成文件成功。

测试代码地址： [HelloFreeMarker: SpringBoot+FreeMarker 学习][HelloFreeMarker_ SpringBoot_FreeMarker]

[SpringBoot_FreeMarker _FreeMarker]: https://blog.csdn.net/dengdaijc/article/details/127285221
[http_127.0.0.1_8080_file_export]: http://127.0.0.1:8080/file/export
[8500c1da7e9c4703b015b2e7fe5b30a4.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/03/3542497e138b4e7f8c8e53ec6cb1d4be.png
[HelloFreeMarker_ SpringBoot_FreeMarker]: https://gitee.com/xiaobailovejiajia/hello-free-marker