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About 1391 wordsAbout 5 min

2025-02-06

安装

git clone https://gitee.com/xiandafu/springboot3-beetl-beetlsql-example
mvn clean compile

工程目录

  • beetl-sample beetl使用例子
  • beetlsql-sample beetlsql 使用例子

1 Beetl模板引擎

进入 beetl-sample 模块

运行

运行 org.example.beetl.BeetlApplication，有如下输出:

Connected to the target VM, address: '127.0.0.1:61322', transport: 'socket'

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v3.1.5)

2025-03-02T10:37:33.219+08:00  INFO 18251 --- [           main] org.example.beetl.BeetlApplication       : Starting BeetlApplication using Java 17.0.4.1 with PID 18251 (/Users/lijiazhi/git/springboot3-beetl-beetlsql-example/beetl-sample/target/classes started by lijiazhi in /Users/lijiazhi/git/springboot3-beetl-beetlsql-example)
2025-03-02T10:37:33.225+08:00  INFO 18251 --- [           main] org.example.beetl.BeetlApplication       : No active profile set, falling back to 1 default profile: "default"
2025-03-02T10:37:34.192+08:00  INFO 18251 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 18080 (http)
2025-03-02T10:37:34.203+08:00  INFO 18251 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2025-03-02T10:37:34.203+08:00  INFO 18251 --- [           main] o.apache.catalina.core.StandardEngine    : Starting Servlet engine: [Apache Tomcat/10.1.15]
2025-03-02T10:37:34.299+08:00  INFO 18251 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2025-03-02T10:37:34.300+08:00  INFO 18251 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1006 ms
2025-03-02T10:37:34.720+08:00  INFO 18251 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 18080 (http) with context path ''
2025-03-02T10:37:34.730+08:00  INFO 18251 --- [           main] org.example.beetl.BeetlApplication       : Started BeetlApplication in 1.947 seconds (process running for 2.994)

使用了Spring Boot3，监听端口为18080.如果需要修改启动端口，需要修改applicaltion.properties

验证

浏览器输入

http://127.0.0.1:18080/

输出

hello beetl

动手修改

修改TestController.indexPage方法，

@GetMapping("/")
public ModelAndView indexPage(){
  String name = "beetl";
  ModelAndView modelAndView  = new ModelAndView("index.html");
  modelAndView.addObject("name",name);
  return modelAndView;
}

为模板index.html添加一个变量

@GetMapping("/")
public ModelAndView indexPage(){
  String name = "beetl";
  String friend = "beetlsql";
  ModelAndView modelAndView  = new ModelAndView("index.html");
  modelAndView.addObject("name",name);
  modelAndView.addObject("friend",friend);
  return modelAndView;
}

修改resources/templates/index.html文件

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
hello ${name} and ${friend}, today is ${date(),"yyyy-MM-dd"}
</body>
</html>

IDE编译整个工程，浏览器再次访问 http://127.0.0.1:18080/,输出

hello beetl and beetlsql, today is 2025-03-02

注意，即使单独修改模板，也许编译整个工程，这是因为Beetl默认的模板根目录是classpath的templates，如果不编译整个工程，修改src/resource/tempaltes目录的index.html 无法拷贝到classpath的templates

2 Beetl脚本引擎

运行

同Beetl，进入 beetl-sample 模块，运行 org.example.beetl.BeetlApplication

在浏览器中输入

http://127.0.0.1:18080/script

会调用程序TestController.script

@GetMapping("/script")
@ResponseBody
public Map script(){
  String script = "var a = 5;var b = 3+a; return b;";
  Map map =BeetlKit.execute(script);
  return map;
}

浏览器输出

{"a":5,"b":8,"return":8}

动手修改

允许传入一个变量 c

@GetMapping("/script")
@ResponseBody
public Map script(@RequestParam Integer c){
  String script = "var a = 5;var b = 3+a*c; return b;";
  Map param = new HashMap();
  param.put("c",c);
  Map map =BeetlKit.execute(script,param);
  return map;
}

在浏览器中输入

http://127.0.0.1:18080/script?c=5

浏览器中输出

{"a":5,"b":28,"return":28}

3 BeetlSQL ORM

进入 beetlsql-sample 模块

运行

运行 org.example.beetlsql.BeetlSQLApplication，有如下输出:


  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v3.1.5)

2025-03-02T14:58:55.887+08:00  INFO 24220 --- [  restartedMain] o.example.beetlsql.BeetlSQLApplication   : Starting BeetlSQLApplication using Java 17.0.4.1 with PID 24220 (/Users/lijiazhi/git/springboot3-beetl-beetlsql-example/beetlsql-sample/target/classes started by lijiazhi in /Users/lijiazhi/git/springboot3-beetl-beetlsql-example)
2025-03-02T14:58:55.889+08:00  INFO 24220 --- [  restartedMain] o.example.beetlsql.BeetlSQLApplication   : No active profile set, falling back to 1 default profile: "default"
2025-03-02T14:58:55.938+08:00  INFO 24220 --- [  restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2025-03-02T14:58:55.938+08:00  INFO 24220 --- [  restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2025-03-02T14:58:56.939+08:00  INFO 24220 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 18080 (http)
2025-03-02T14:58:56.947+08:00  INFO 24220 --- [  restartedMain] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2025-03-02T14:58:56.947+08:00  INFO 24220 --- [  restartedMain] o.apache.catalina.core.StandardEngine    : Starting Servlet engine: [Apache Tomcat/10.1.15]
2025-03-02T14:58:56.994+08:00  INFO 24220 --- [  restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2025-03-02T14:58:56.995+08:00  INFO 24220 --- [  restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1056 ms
2025-03-02T14:58:57.119+08:00  INFO 24220 --- [  restartedMain] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
2025-03-02T14:58:57.285+08:00  INFO 24220 --- [  restartedMain] com.zaxxer.hikari.pool.HikariPool        : HikariPool-1 - Added connection conn0: url=jdbc:h2:mem:dbtest user=SA
2025-03-02T14:58:57.287+08:00  INFO 24220 --- [  restartedMain] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
2025-03-02T14:58:57.656+08:00  INFO 24220 --- [  restartedMain] o.s.b.d.a.OptionalLiveReloadServer       : LiveReload server is running on port 35729
2025-03-02T14:58:57.678+08:00  INFO 24220 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 18080 (http) with context path ''
2025-03-02T14:58:57.687+08:00  INFO 24220 --- [  restartedMain] o.example.beetlsql.BeetlSQLApplication   : Started BeetlSQLApplication in 2.129 seconds (process running for 2.498)
2025-03-02T15:01:03.745+08:00  INFO 24220 --- [io-18080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'
2025-03-02T15:01:03.746+08:00  INFO 24220 --- [io-18080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
2025-03-02T15:01:03.747+08:00  INFO 24220 --- [io-18080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 1 ms

相比Beetl例子，这里输出多了HikariPool的初始化日志输出，代码在org.example.beetlsql.conf.DataSourceConfig

验证

浏览器输入

http://127.0.0.1:18080/

输出，会从数据库中查询俩条name=lijz的记录

[{"id":1,"name":"lijz"},{"id":4,"name":"lijz"}]

动手修改

修改org.example.beetlsql.service.BookService,增加一个all方法，查询所有的记录，all方法是BeetlSQL提供的BaseMapper的一个内置方法的

public List<Book> all(){
		return bookMapper.all(); 
}

修改org.example.beetlsql.web.TestController,增加一个all方法

@GetMapping("/all")
public List<Book> all(){
  List<Book> list = bookService.all();
  return list;
}

IDE编译整个工程，浏览器访问 `http://127.0.0.1:18080/all,输出

[{"id":1,"name":"lijz"},{"id":2,"name":"lucy"},{"id":3,"name":"bear"}]

4 Beetl&BeetlSQL

这是一个综合Beetl和BeetlSQL的例子，Beetl作为模板引擎，BeetlSQL作为ORM工具

进入 beetl-beetlsql-sample 模块

运行

运行 org.example.beetlsql.AllApplication ，输出类似BeetlSQL ORM例子的输出

验证

浏览器输入

http://127.0.0.1:18080/

会调用TestController.indexPage, 输出会渲染输出resources/templates/index.html,输出如下

hello lijz
hello lijz

模板页面内容如下

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<!-- for(book in books){ -->
hello ${book.name} <br/>
<!-- } -->
</body>
</html>

模板页面使用了定界符类似HTML的注释符号 <!--和 -->,你可以修改resources/beetl.properties,改成其他符号

DELIMITER_PLACEHOLDER_START=${
DELIMITER_PLACEHOLDER_END=}
DELIMITER_STATEMENT_START=<!--
DELIMITER_STATEMENT_END=-->

知行合一

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