日拱一卒：通用 Bean 方法调用

1. 通用工具

入口 http://localhost:8080/tool

执行结果：

2. 获取所有Bean

@Controller
@RequestMapping("tool")
public class BeanTools {
    @GetMapping(value = {"", "/common"})
    public ModelAndView common() {
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.addObject("beanNames", getBeanNames());
        modelAndView.setViewName("invoke.html");
        return modelAndView;
    }

    private List getBeanNames() {
        List beanNames = SpringBeanUtils.getBeans();
        List beanObjs = new ArrayList();
        beanNames.forEach(str -> {
            JSONObject obj = new JSONObject();
            obj.put("text", str);
            obj.put("value", str);
            beanObjs.add(obj);
        });
        return beanObjs;
    }
}

@Component
public class SpringBeanUtils implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

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

    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    public static List getBeans() {
        String[] beanDefinitionNames = getApplicationContext().getBeanDefinitionNames();
        List beanNames = Arrays.stream(beanDefinitionNames)
                .filter(str -> !str.contains("."))
                .collect(Collectors.toList());
        beanNames.sort(String::compareTo);

        return beanNames;
    }
}

3. 获取 Bean 的方法

@RestController
@RequestMapping("/ajax")
public class BeanAjax {

    @GetMapping("/getMethods")
    public List getMethods(String beanName) {
        return getBeanMethods(beanName);
    }

    @PostMapping("/beanMethods")
    public List beanMethods(AjaxPojo ajaxPojo) {
        return getBeanMethods(ajaxPojo.getBeanName());
    }

    private List getBeanMethods(String beanName) {
        List list = new ArrayList();

        Object bean = SpringBeanUtils.getBean(beanName);
        Method[] methods = bean.getClass().getMethods();
        for (Method method : methods) {
            String methodSign = method.toString();
            String paramSign = methodSign.substring(methodSign.indexOf("("), methodSign.indexOf(")") + 1);
            list.add(new Item(method.getName() + paramSign, method.getName() + paramSign));
        }

        return list;
    }

    @Data
    public class Item implements Serializable {
        private static final long serialVersionUID = -6504357622310055548L;
        private String text;
        private String value;

        public Item(String text, String value) {
            this.text = text;
            this.value = value;
        }
    }

    @Data
    public class AjaxPojo implements Serializable {
        private String appName;
        private String beanName;
        private String methodName;
        private List args = new ArrayList();
    }
}

4. 执行方法

@RestController
@RequestMapping("/ajax")
public class BeanAjax {
    
    @PostMapping("/invoke")
    public JSONObject invoke(AjaxPojo ajaxPojo) throws InvocationTargetException, IllegalAccessException {
        String beanName = ajaxPojo.getBeanName();
        String methodName = ajaxPojo.getMethodName();
        List args = ajaxPojo.getArgs();

        Object bean = SpringBeanUtils.getBean(beanName);
        Method method = findMethod(bean, methodName);
        Object invoke = method.invoke(bean, ReflectDemo.assemblyArgs(args, method.getParameterTypes()));

        JSONObject result = new JSONObject();
        JSONObject request = new JSONObject();
        request.put("beanName", beanName);
        request.put("methodName", method.getName());
        request.put("params", ajaxPojo.getArgs());
        request.put("paramTypes", method.getParameterTypes());
        JSONObject response = new JSONObject();
        response.put("data", invoke);
        response.put("success", "true");
        result.put("request", request);
        result.put("response", response);
        return result;
    }

    private Method findMethod(Object bean, String methodName) {
        Method[] methods = bean.getClass().getMethods();
        for (Method method : methods) {
            String methodSign = method.toString();
            if (methodSign.contains(methodName)) {
                return method;
            }
        }
        return null;
    }

    @Data
    public class AjaxPojo implements Serializable {
        private String appName;
        private String beanName;
        private String methodName;
        private List args = new ArrayList();
    }
}

public class ReflectDemo {

    /**
     * 参数组装
     *
     * @param arguments      参数值
     * @param parameterTypes 参数类型
     * @return
     */
    public static Object[] assemblyArgs(List arguments, Class>[] parameterTypes) {
        List

5. 页面 invoke.html

    


通用工具

    

        IP地址:
        


    

        所属应用:
        请选择
concrete

    

        bean名称:
        请选择


    

        method名称:
        请选择

    

        提交
    

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