springboot手动动态注入controller和service方式

package test;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.beans.factory.config.BeanDefinition;

import org.springframework.beans.factory.support.BeanDefinitionBuilder;

import org.springframework.beans.factory.support.DefaultListableBeanFactory;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.context.ApplicationContext;

import org.springframework.context.ConfigurableApplicationContext;

import org.springframework.core.io.FileSystemResource;

import org.springframework.core.io.FileSystemResourceLoader;

import org.springframework.stereotype.Component;

import org.springframework.util.ClassUtils;

import org.springframework.util.ReflectionUtils;

import org.springframework.util.StringUtils;

import org.springframework.web.servlet.mvc.method.RequestMappingInfo;

import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import java.net.MalformedURLException;

import java.net.URL;

import java.net.URLClassLoader;

@SpringBootApplication

@Component

public class ApplicationBootstrap {

     static ApplicationContext applicationContext;

     static String file = "F:\\download\\apache-maven-3.3.9-bin\\repository\\org\\example\\springboot-test-common\\1.0-SNAPSHOT\\" +

             "springboot-test-common-1.0-SNAPSHOT.jar" ;

     public static void main(String[] args) throws Exception {

         applicationContext = SpringApplication.run(ApplicationBootstrap. class , args);

         String clazzName = "test1.controller.MyTestController1" ;

         String clazzName1 = "test1.service.MyTestServiceImpl" ;

         registerBean(clazzName1);

         registerBean(clazzName);

         registerController(StringUtils.uncapitalize(clazzName.substring(clazzName.lastIndexOf( "." ) + 1 )));

     }

     public static void registerBean(String clazzName) throws Exception{

         URL url = new File(file).toURI().toURL();

//        URLClassLoader loader = (URLClassLoader) ApplicationBootstrap.class.getClassLoader();

//        Method add = URLClassLoader.class.getDeclaredMethod("addURL", new Class[] { URL.class });

//        add.setAccessible(true);

//        add.invoke(loader, url);

         URLClassLoader loader = new URLClassLoader( new URL[]{url});

//        String clazzName = "test1.controller.MyTestController1";

         Class<?> clazz = loader.loadClass(clazzName);

//        applicationContext.getClassLoader().loadClass("test.MyController");

//        DefaultListableBeanFactory factory = (DefaultListableBeanFactory) applicationContext.getAutowireCapableBeanFactory();

         BeanDefinitionBuilder beanDefinitionBuilder = BeanDefinitionBuilder.genericBeanDefinition(clazz);

         BeanDefinition beanDefinition = beanDefinitionBuilder.getRawBeanDefinition();

         //设置当前bean定义对象是单利的

         beanDefinition.setScope( "singleton" );

         //将变量首字母置小写

         String beanName = StringUtils.uncapitalize(clazzName);

         beanName =  beanName.substring(beanName.lastIndexOf( "." )+ 1 );

         beanName = StringUtils.uncapitalize(beanName);

         //将applicationContext转换为ConfigurableApplicationContext

         ConfigurableApplicationContext configurableApplicationContext = (ConfigurableApplicationContext) applicationContext;

         // 获取bean工厂并转换为DefaultListableBeanFactory

         DefaultListableBeanFactory defaultListableBeanFactory = (DefaultListableBeanFactory) configurableApplicationContext.getBeanFactory();

         defaultListableBeanFactory.registerBeanDefinition(beanName, beanDefinition);

     }

     /**

      * 注册Controller

      * @param controllerBeanName

      * @throws Exception

      */

     public static void registerController(String controllerBeanName) throws Exception{

         final RequestMappingHandlerMapping requestMappingHandlerMapping=

                 applicationContext.getBean(RequestMappingHandlerMapping. class );

         if (requestMappingHandlerMapping!= null ){

             String handler=controllerBeanName;

             Object controller= applicationContext.getBean(handler);

             if (controller== null ){

                 return ;

             }

//            unregisterController(controllerBeanName);

             //注册Controller

             Method method=requestMappingHandlerMapping.getClass().getSuperclass().getSuperclass().

                     getDeclaredMethod( "detectHandlerMethods" ,Object. class );

             //将private改为可使用

             method.setAccessible( true );

             method.invoke(requestMappingHandlerMapping,handler);

         }

     }

     /**

      * 去掉Controller的Mapping

      * @param controllerBeanName

      */

     public static void unregisterController(String controllerBeanName){

         final RequestMappingHandlerMapping requestMappingHandlerMapping=(RequestMappingHandlerMapping)

                 applicationContext.getBean( "requestMappingHandlerMapping" );

         if (requestMappingHandlerMapping!= null ){

             String handler=controllerBeanName;

             Object controller= applicationContext.getBean(handler);

             if (controller== null ){

                 return ;

             }

             final Class<?> targetClass=controller.getClass();

             ReflectionUtils.doWithMethods(targetClass, new ReflectionUtils.MethodCallback() {

                 public void doWith(Method method) {

                     Method specificMethod = ClassUtils.getMostSpecificMethod(method, targetClass);

                     try {

                         Method createMappingMethod = RequestMappingHandlerMapping. class .

                                 getDeclaredMethod( "getMappingForMethod" , Method. class , Class. class );

                         createMappingMethod.setAccessible( true );

                         RequestMappingInfo requestMappingInfo =(RequestMappingInfo)

                                 createMappingMethod.invoke(requestMappingHandlerMapping,specificMethod,targetClass);

                         if (requestMappingInfo != null ) {

                             requestMappingHandlerMapping.unregisterMapping(requestMappingInfo);

                         }

                     } catch (Exception e){

                         e.printStackTrace();

                     }

                 }

             }, ReflectionUtils.USER_DECLARED_METHODS);

         }

     }

}

package com.mzj.springboot.actionpai.controller; 

import com.mzj.springboot.actionpai测试数据mon.User;

import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;

import java.util.List;

@RestController

public class HelloWorldController3 {

    //----------------------方法1、获取路径中的值----------------------------

    /**

      * URL：http://localhost:8081/addUser0/MAZHONGJIA

      *

      * @param username

      * @return

      */

    @GetMapping ( "/addUser0/{username}" )

    public String addUser0( @PathVariable String username) {

        System.out.println( "username : " + username);

        return "success0" ;

    }

    //----------------------方法2、获取路径中的参数----------------------------

    /**

      * URL：http://localhost:8081/addUser1?username=mazhongjia

      *

      * @param username

      * @return

      */

    @GetMapping ( "/addUser1" )

    public String addUser1(String username) {

        System.out.println( "username : " + username);

        return "success1" ;

    }

    //----------------------方法3、通过bean接收HTTP提交的对象----------------------------

    /**

      * URL：http://localhost:8081/addUser2?username=mazhongjia&age=33

      *

      * @param user

      * @return

      */

    @GetMapping ( "/addUser2" )

    public String addUser2(User user) {

        System.out.println( "user ... " + user);

        return "success2" ;

    }

    //----------------------方法4、通过HttpServletRequest接收参数----------------------------

    /**

      * URL：http://localhost:8081/addUser3?username=mazhongjia

      *

      * @param request

      * @return

      */

    @GetMapping ( "/addUser3" )

    public String addUser3(HttpServletRequest request) {

        System.out.println( "username ... " + request.getParameter( "username" ));

        return "success3" ;

    }

    //----------------------方法5、用@RequestParam绑定入参----------------------------

    /**

      * 通过@RequestParam注解绑定入参

      * <p>

      * URL：http://localhost:8081/addUser1?username=mazhongjia

      *

      * @param username

      * @return

      */

    @GetMapping ( "/addUser4" )

    public String addUser4( @RequestParam String username) {

        System.out.println( "username : " + username);

        return "success4" ;

    }

    //----------------------方法6、用@RequestBody接收JSON数据----------------------------

    /**

      * URL：http://localhost:8081/addUser5

      * BODY：

      * [

      * {

      * "username": "mazhongjia",

      * "age": "35"

      * },

      * {

      * "username": "huan",

      * "age": "31"

      * }

      * ]

      * <p>

      * 通过@RequestBody接收JSON入参，同时需要设置http的header中Content-Type属性值为【application/json;charset=UTF-8】

      *

      * @param userList

      * @return

      */

    @PostMapping ( "/addUser5" )

    public String addUser5( @RequestBody List<User> userList) {

        System.out.println( "userList : " + userList);

        return "success5" ;

    }

    //----------------------方法7、用@ModelAttribute注解获取参数----------------------------

    /**

      * URL：http://localhost:8081/addUser6?username=mazhong&age=35

      * <p>

      * 通过@ModelAttribute注解，从Model、Form或者URL请求参数中获取属性值，上面的URL演示从URL参数中取值

      *

      * @param user

      * @return

      */

    @PostMapping ( "/addUser6" )

    public String addUser6( @ModelAttribute ( "user" ) User user) {

        System.out.println( "user ... " + user);

        return "success6" ;

    }

    /**

      * URL：http://localhost:8081/addUser7

      * <p>

      * 通过@ModelAttribute注解，从Model、Form或者URL请求参数中获取属性值，上面的URL演示从Model中取值

      *

      * @param user

      * @return

      */

    @PostMapping ( "/addUser7" )

    public String addUser7( @ModelAttribute ( "user" ) User user) {

        System.out.println( "user7 ... " + user);

        return "success7" ;

    }

    @ModelAttribute ( "user" )

    public User addAccount() {

        return new User( "jz" , 55 );

    } 

}