A Simple Java MVC Framework。提供Bean容器、Ioc、Aop、MVC功能
APACHE-2.0 License
doodle是一个简易的Java MVC框架,它提供了类似于spring 的Bean容器、IOC、AOP、MVC等功能
代码简洁、轻量,适合用于参考学习spring
DispatcherServlet
请求逻辑处理采用责任链模式,方便增加修改规则Http请求访问设计图:
git clone https://github.com/zzzzbw/doodle.git
或直接下载代码到本地
将项目导入到IDE中,这是maven工程,确保你已经安装maven
执行doodle-example/src/main/java
下的github.zzzzbw.App
类的main()
方法即可启动Tomcat服务器
浏览器访问http://localhost:9090/user/list
和http://localhost:9090/user/detail?id=1
链接
通过'Postman'等工具用post
方式请求到链接http://localhost:9090/user/add?name=zzzzbw
和http://localhost:9090/user/delete?id=1
修改数据
创建一个 maven 项目,引入核心依赖
<dependency>
<groupId>com.github.zzzzbw</groupId>
<artifactId>doodle-core</artifactId>
<version>0.1</version>
</dependency>
启动类:
public class App {
public static void main(String[] args) {
Doodle.run(App.class, 9090);
}
}
使用方式与spring基本一致,不过只支持类型注入,即如果被注入对象为类,则注入其实例,如果被注入对象为接口,则注入其实现类。
@Component
public class EmailComponent {
// do something
}
为UserController
注入EmailComponent
@Controller
public class UserController {
@Autowired
private EmailComponent emailComponent;
// do something
}
MethodBeforeAdvice
,AfterReturningAdvice
,ThrowsAdvice
,AroundAdvice
中的一个或者多个接口@Aspect
注解,且有正确的aspectj切点表达式@Order
注解来决定增强处理类的先后顺序@Order(1)
@Aspect(pointcut = "@within(Controller)")
public class Aspect1 implements AroundAdvice {
@Override
public void afterReturning(Class<?> clz, Object returnValue, Method method, Object[] args) throws Throwable {
// do something
}
@Override
public void before(Class<?> clz, Method method, Object[] args) throws Throwable {
// do something
}
@Override
public void afterThrowing(Class<?> clz, Method method, Object[] args, Throwable e) {
// do something
}
}
@Order(2)
@Aspect(pointcut = "@within(Controller)")
public class Aspect2 implements AroundAdvice {
@Override
public void afterReturning(Class<?> clz, Object returnValue, Method method, Object[] args) throws Throwable {
// do something
}
@Override
public void before(Class<?> clz, Method method, Object[] args) throws Throwable {
// do something
}
@Override
public void afterThrowing(Class<?> clz, Method method, Object[] args, Throwable e) {
// do something
}
}
上面两个增强处理类Aspect1
和Aspect2
,会增强被@Controller
注解的类下的方法,且顺序为:
Aspect1@before()->Aspect2@before()->method.invoke()->Aspect2@afterReturning()->Aspect1@afterReturning()
使用几乎与spring一致
返回String类型的则返回jsp页面的路径,返回ModelAndView则在其view中设置jsp页面路径,同时可以传一些参数给jsp页面
被@ResponseBody
注解的则返回的是json格式数据
@Controller
@RequestMapping(value = "/user")
public class UserController {
@Autowired
private UserService userService;
@RequestMapping(value = "/list", method = RequestMethod.GET)
public ModelAndView getUserList() {
List<User> list = userService.getUser();
return new ModelAndView().setView("user_list.jsp").addObject("list", list);
}
@RequestMapping(value = "/detail", method = RequestMethod.GET)
public ModelAndView getUser(@RequestParam(value = "id") long id) {
User user = userService.getUserById(id);
return new ModelAndView().setView("user_detail.jsp").addObject("user", user);
}
@RequestMapping(value = "/add", method = RequestMethod.POST)
@ResponseBody
public Result<User> addUser(@RequestParam(value = "name") String name) {
User user = userService.addUser(name);
return new Result<>(user, 0, "");
}
@RequestMapping(value = "/delete", method = RequestMethod.POST)
@ResponseBody
public Result<String> deleteUser(@RequestParam(value = "id") long id) {
userService.deleteUser(id);
return new Result<>("success", 0, "");
}
}
doodle暂时功能没有完善,在使用过程中有一些约束条件
@Component
只应用于类,应用于接口或抽象类将无效Controller
被@RequestMapping
标注的方法,其参数必须必须被@RequestParam
注解,且参数必须是java的基本数据类型或者基本数据的包装类(如int,Integer等)本项目不仅参考了spring-boot,同时还参考了:
这些都是国人写的更轻量而且也很优秀的框架,相比spring-boot来说阅读源码的难度会小一些。感谢这些框架给我提供学习的思路,同时给我们更多的选择。