spring boot 动态编译 springboot groovy 动态

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mob6454cc6ff2b9 2023-06-14 10:06:16

文章标签 spring boot 动态编译 spring boot java spring xml 文章分类 代码人生

文章目录

Groovy

pom
ResourceScriptSource

service
serviceImpl
spring-groovy.xml
主启动类

StaticScriptSource

service
spring-groovy.xml
启动类

DatabaseScriptSource

方式一

sql
spring-groovy.xml
测试

脚本

基本使用
使用bean
动态脚本调用bean

Groovy

Groovy是一种基于Java的语法的基于JVM的编程语言。Groovy支持动态输入，闭包，元编程，运算符重载等等语法。适用于一些可变、和规则配置性的需求。除此之外，Groovy还提供了许多类似脚本语言的功能，比如，多行字符串，字符串插值，优雅的循环结构和简单的属性访问。另外，结尾分号是可选的。而这些都有足够的理帮助开发人员为了提高开发效率。

换句话说，Groovy就是一种继承了动态语言的优良特性并运行在JVM上的编程语言

ResourceScriptSource：在 resources 下面写groovy类
StaticScriptSource：把groovy类代码放进XML里
DatabaseScriptSource：把groovy类代码放进数据库中

https://www.jianshu.com/p/c7803626c09d

groovy语法：https://www.w3cschool.cn/groovy/groovy_basic_syntax.html

变量，判断，列表，映射，模板，数据库，对象，

pom

<!-- groovy -->
<dependency>
    <artifactId>groovy</artifactId>
    <groupId>org.codehaus.groovy</groupId>
    <version>2.5.8</version>
    <scope>compile</scope>
</dependency>

ResourceScriptSource

service

// com.example.demo.groovy.GroovyService1
public interface GroovyService1 {
    String sayHello();
}

serviceImpl

注意：GroovyService1Impl.groovy

// resources/groovy/GroovyService1Impl.groovy

class GroovyService1Impl implements GroovyService1 {

    String name;

    @Override
    public String sayHello() {
        return "Hello $name. Welcome to resource in Groovy.";
    }
}

spring-groovy.xml

// src/main/resources/spring-groovy.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:lang="http://www.springframework.org/schema/lang"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/lang
                           http://www.springframework.org/schema/lang/spring-lang.xsd">

<lang:groovy id="GroovyService1" script-source="classpath: groovy/GroovyService1Impl.groovy">
        <lang:property name="name" value="maple"></lang:property>
    </lang:groovy>


</beans>

主启动类

@SpringBootApplication
public class GroovyResourceApplication {
    public static void main(String[] args) {
        //SpringApplication.run(GroovyResourceApplication.class, args);
    ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("spring-groovy.xml");
        GroovyService1 bean = context.getBean(GroovyService1.class);
        String sayHello = bean.sayHello();
        System.out.println("spring-groovy.xml " + sayHello);

    }
}

// 输出：
// Hello test. Welcome to resource in Groovy.

StaticScriptSource

service

// // com.example.demo.groovy.GroovyService
public interface GroovyService {
    String sayHello();
}

spring-groovy.xml

// src/main/resources/spring-groovy.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:lang="http://www.springframework.org/schema/lang"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                           http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/lang
                           http://www.springframework.org/schema/lang/spring-lang.xsd">

    <lang:groovy id="helloService">
        <lang:inline-script>
            import com.example.demo.groovy.GroovyService

            class HelloServiceImpl implements GroovyService {

                String name;

                @Override
                String sayHello() {
                    return "Hello $name. Welcome to static script in Groovy.";
                }
            }

        </lang:inline-script>
        <lang:property name="name" value="test"/>
    </lang:groovy>

</beans>

启动类

@SpringBootApplication
public class DemoApplication {

    public static void main(String[] args) {
//        ConfigurableApplicationContext run = SpringApplication.run(DemoApplication.class, args);

        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("spring-groovy.xml");
        GroovyService bean = context.getBean(GroovyService.class);
        String sayHello = bean.sayHello();
        System.out.println(sayHello);
    }
}

// Hello test. Welcome to resource in Groovy.

DatabaseScriptSource

方式一

实时读取DB里的groovy脚本文件
利用GroovyClassLoader去编译脚本文件
把class对象注入成Spring bean
反射调用脚本的方法

sql

CREATE TABLE `groovy_script` (
  `id` bigint NOT NULL AUTO_INCREMENT,
  `script_name` varchar(64) NOT NULL COMMENT 'script name',
  `script_content` text NOT NULL COMMENT 'script content',
  `status` varchar(16) NOT NULL DEFAULT 'ENABLE' COMMENT 'ENABLE/DISENABLE',
  `extend_info` varchar(4096) DEFAULT NULL,
  `created_time` timestamp(6) NOT NULL DEFAULT CURRENT_TIMESTAMP(6),
  `modified_time` timestamp(6) NOT NULL DEFAULT CURRENT_TIMESTAMP(6) ON UPDATE CURRENT_TIMESTAMP(6),
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='groovy script';

spring-groovy.xml

INSERT INTO book_shop2.groovy_script
(id, script_name, script_content, status, extend_info, created_time, modified_time)
VALUES(1, 'groovyService', 'import com.example.demo.groovy.GroovyService

            class HelloServiceImpl implements GroovyService {

				@Override
				String sayHello() {
					return "sayHello";
				}
				
                @Override
                String sayHello(String name) {
                    return "Hello " + name + ". Welcome to static script in Groovy.";
                }
            }', 'ENABLE', NULL, '2020-09-26 17:16:36.477818000', '2022-09-04 22:54:51.421959000');

测试

@RestController
public class GroovyController {

    @Autowired
    GroovyScriptMapper groovyScriptMapper;

    @GetMapping("/aaaa")
    private String groovyTest() throws IllegalAccessException, InstantiationException, InvocationTargetException, NoSuchMethodException {

        GroovyScript groovyScript = this.groovyScriptMapper.getOne(1L);
        System.out.println(groovyScript.getScriptContent());

        Class clazz = new GroovyClassLoader().parseClass(groovyScript.getScriptContent());
        Object o = clazz.newInstance();
        SpringContextUtils.autowireBean(o);
        Method method = clazz.getMethod("sayHello", String.class);
        String aaaaaaa = (String) method.invoke(o, "aaaaaaa");
        System.out.println(aaaaaaa);
        return aaaaaaa;
    }
}

// Hello aaaaaaa. Welcome to static script in Groovy.

public interface GroovyScriptMapper extends BaseMapper<GroovyScript> {

    @Select({"select script_content from groovy_script where id = #{id}"})
    @Result(column = "script_content", property = "scriptContent")
    GroovyScript getOne(Long id);
}

脚本

基本使用

public static void main(String[] args) {

        test1();
        test2();

    }

    private static void test1() {
        GroovyShell groovyShell = new GroovyShell();
        //装载解析脚本代码
        Script script = groovyShell.parse("" +
                "def add(int a, int b) {\n" +
                "    return a + b\n" +
                "}\n" +
                "\n" +
                "def mapToString(Map<String, String> paramMap) {\n" +
                "    StringBuilder stringBuilder = new StringBuilder();\n" +
                "    paramMap.forEach({ key, value ->\n" +
                "        stringBuilder.append(\"key:\" + key + \";value:\" + value)\n" +
                "    })\n" +
                "    return stringBuilder.toString()\n" +
                "}");
        //执行加法脚本
        Object[] params1 = new Object[]{1, 2};
        int sum = (int) script.invokeMethod("add", params1);
        System.out.println("a加b的和为:" + sum);
        //执行解析脚本
        Map<String, String> paramMap = new HashMap<>();
        paramMap.put("科目1", "语文");
        paramMap.put("科目2", "数学");
        Object[] params2 = new Object[]{paramMap};
        String result = (String) script.invokeMethod("mapToString", params2);
        System.out.println("mapToString:" + result);

    }

    private static void test2() {
        Binding groovyBinding = new Binding();
        groovyBinding.setVariable("map", new HashMap<>());
        GroovyShell groovyShell = new GroovyShell(groovyBinding);
        String scriptContent = "import com.example.demo.groovy.GroovyService1\n" +
                "map.put('a', '1');" +
                "def query = map.get('a');" +
                "println('aaaaaa' + query)";

        Script script = groovyShell.parse(scriptContent);
        script.run();
    }

使用bean

@Component
public class SpringContextUtils implements ApplicationContextAware {

    static ApplicationContext context;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringContextUtils.context = applicationContext;
    }

    public static void autowireBean(Object bean) {
        context.getAutowireCapableBeanFactory().autowireBean(bean);
    }

    public static ApplicationContext getContext() {
        return context;
    }

    public static <T> T getBean(Class<T> clazz) {
        return context.getBean(clazz);

    }

    public static <T> T getBean(String name) {
        return (T) context.getBean(name);

    }
}

演示例子，在spring中使用

@GetMapping("/aaaa")
    private String groovyTest() throws Exception {

        test3();

        return aaaa;
    }

private static void test3() {
    GroovyShell groovyShell = new GroovyShell();
    //装载解析脚本代码
    Script script = groovyShell.parse("" +
            "\n" +
            "import com.example.demo.service.UserService\n" +
            "import com.example.demo.utils.SpringUtils\n" +
            "def getBean() {\n" +
            "    UserService userService = SpringUtils.getBean(UserService.class);\n" +
            "    println(userService.getUserName())\n" +
            "}");
    //执行
    script.invokeMethod("getBean", null);

}

动态脚本调用bean

@RestController
@RequestMapping("/groovy/script")
public class GroovyScriptController {

    @Autowired
    private Binding groovyBinding;

    private GroovyShell groovyShell;

    @PostConstruct
    public void init(){
        System.out.println("com.example.demo.groovy.GroovyScriptController.init -----");
        GroovyClassLoader groovyClassLoader = new GroovyClassLoader(this.getClass().getClassLoader());
        CompilerConfiguration compilerConfiguration = new CompilerConfiguration();
        compilerConfiguration.setSourceEncoding("utf-8");
        compilerConfiguration.setScriptBaseClass(TestScript.class.getName());

        this.groovyShell = new GroovyShell(groovyClassLoader, this.groovyBinding, compilerConfiguration);
    }

    @RequestMapping(value = "/execute", method = RequestMethod.POST)
    public String execute(@RequestBody String scriptContent) {
        Script script = this.groovyShell.parse(scriptContent);
        return String.valueOf(script.run());
    }
}

@Configuration
public class GroovyBindingConfig implements ApplicationContextAware {

    private ApplicationContext applicationContext;

    @Bean("groovyBinding")
    public Binding groovyBinding() {
        Binding groovyBinding = new Binding();

        // 获取所有bean放入map
        Map<String, Object> beanMap = this.applicationContext.getBeansOfType(Object.class);
        //遍历设置所有bean,可以根据需求在循环中对bean做过滤
        for (String beanName : beanMap.keySet()) {
            if (beanName.equals("userServiceImpl")) {
                System.out.println("com.example.demo.groovy.GroovyBindingConfig.groovyBinding --- userServiceImpl");
            }
            groovyBinding.setVariable(beanName, beanMap.get(beanName));
        }
        return groovyBinding;
    }

    /*@Bean("groovyBinding1")
    public Binding groovyBinding1() {
        Map<String, Object> beanMap = applicationContext.getBeansOfType(Object.class);
        return new Binding(beanMap); //如果不需要对bean做过滤，直接用beanMap构造Binding对象即可
    }*/

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;

    }
}

spring boot 动态编译 springboot groovy 动态_spring boot

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