Spring Boot集成groovy快速入门Demo

1.什么是groovy？

系统编程语言的目的：

• 开发复杂的算法或者数据结构
• 实现计算密集型应用
• 操作大型数据集
• 实现定义良好的、变更缓慢的需求

脚本语言应用的目的：

• 连接已有的组件
• 处理经常变化的多种类型的实体
• 具有图形化用户界面
• 拥有快速变化的功能

2.代码工程

实验目的

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>springboot-demo</artifactId>
        <groupId>com.et</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>groovy</artifactId>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-autoconfigure</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.codehaus.groovy/groovy-all -->
        <dependency>
            <groupId>org.codehaus.groovy</groupId>
            <artifactId>groovy-all</artifactId>
            <version>2.4.7</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.10</version>
        </dependency>
    </dependencies>
</project>

conotroller

package com.et.groovy.controller;

import com.et.groovy.component.TestScript;
import groovy.lang.Binding;
import groovy.lang.GroovyClassLoader;
import groovy.lang.GroovyShell;
import groovy.lang.Script;
import org.codehaus.groovy.control.CompilerConfiguration;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.PostConstruct;

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

    @Autowired
    private Binding groovyBinding;

    private GroovyShell groovyShell;

    @PostConstruct
    public void init(){
        GroovyClassLoader groovyClassLoader = new GroovyClassLoader(this.getClass().getClassLoader());
        CompilerConfiguration compilerConfiguration = new CompilerConfiguration();
        compilerConfiguration.setSourceEncoding("utf-8");
        compilerConfiguration.setScriptBaseClass(TestScript.class.getName());

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

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

service

package com.et.groovy.service;

import groovy.lang.Binding;
import groovy.lang.GroovyShell;
import groovy.lang.Script;
import org.springframework.stereotype.Service;

@Service
public class TestService {

    public String testQuery(long id){
        return "Test query success, id is " + id;
    }

    public static void main(String[] args) {
        Binding groovyBinding = new Binding();
        groovyBinding.setVariable("testService", new TestService());
        GroovyShell groovyShell = new GroovyShell(groovyBinding);

        String scriptContent = "import pers.doublebin.example.groovy.script.service.TestService\n" +
                "def query = new TestService().testQuery(1L);\n" +
                "query";

        /*String scriptContent = "def query = testService.testQuery(2L);\n" +
                "query";*/

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

config

package com.et.groovy.config;

import groovy.lang.Binding;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.Map;

@Configuration
public class GroovyBindingConfig implements ApplicationContextAware {

    private ApplicationContext applicationContext;

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

        Map<String, Object> beanMap = applicationContext.getBeansOfType(Object.class);
        for (String beanName : beanMap.keySet()) {
            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); 
    }

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

    }
}

components

package com.et.groovy.component;

import groovy.lang.Script;

public class TestScript extends Script {
    @Override
    public Object run() {
        return null;
    }

    public Integer add (Integer first, Integer second) {
        return first + second;
    }
}

以上只是一些关键代码，所有代码请参见下面代码仓库

代码仓库

• https://github.com/Harries/springboot-demo

3.测试

测试执行groovy脚本

4.引用

• https://github.com/double-bin/groovy-script-example