使用 Java 执行 groovy 脚本或方法

1. 引入依赖

 <dependency>
            <groupId>org.codehaus.groovy</groupId>
            <artifactId>groovy-all</artifactId>
            <version>${groovy.version}</version>
        </dependency>

2. 使用 Java 执行 groovy 脚本

 @ApiOperation(notes = "测试 groovy 脚本与占位符", value = "测试 groovy 脚本与占位符")
    @GetMapping(path = "/test")
    public String test(@RequestParam("script") String script, @RequestParam("param") String param, @RequestParam("param2") String param2) {
        if (StringUtils.isEmpty(script)) {
            throw new RuntimeException("脚本不能为空");
        }
        log.info("script");
        try {
            ScriptEngineManager factory = new ScriptEngineManager();
            ScriptEngine engine = factory.getEngineByName("groovy");
            Bindings bindings = engine.createBindings();
            bindings.put("message", param);
            bindings.put("miao", param2);
            return engine.eval(script, bindings).toString();
        } catch (Exception e) {
            log.error(e.toString());
            return null;
        }
    }

3. 使用 Java 执行 groovy 方法

@ApiOperation(notes = "测试 groovy 函数", value = "测试 groovy 函数")
    @GetMapping(path = "/test2")
    public String test2(@RequestParam("script") String script, @RequestParam("func") String func, @RequestParam("param1") String param1, @RequestParam("param2") String param2) {
        if (StringUtils.isEmpty(script)) {
            throw new RuntimeException("脚本不能为空");
        }
        log.info(script);
        try {
            ScriptEngineManager factory = new ScriptEngineManager();
            ScriptEngine engine = factory.getEngineByName("groovy");
            engine.eval(script);
            Invocable inv = (Invocable) engine;
            return inv.invokeFunction(func, param1, param2).toString();
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }