站长之家短链接生成晋江小学网站建设

变为负进度了，还是要用baseservlet，我就又重新写了一部分，看了好几遍视频，突然就想明白了，感觉每次要上课，就时间不连续思路总是断，今天晚自习算是搞懂了怎么写了，就是代码有点多，写的有点慢一开始那个构架也挺难理解的（对我来说）


这是我cotroller类的代码，注册部分：

@WebServlet("/register") // 定义Servlet的URL映射
@MultipartConfig
public class RegisterController1 extends BaseServlet {SomeMethod someMethod=new SomeMethod();@ReturnType(ResponseType.JSON)@POST(value = "AddUser")public String AddUser(@FormData("username") String username, @FormData("password") String password, @FormData("email") String email) throws IOException, NoSuchAlgorithmException {RegisterMethod registerMethod=new RegisterMethod();return registerMethod.AddUser(username,password,email);

这是baseservlet部分：

@MultipartConfig
public class BaseServlet extends HttpServlet {@Overrideprotected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {req.getQueryString();req.setCharacterEncoding("UTF-8");//用字符串记录发过来的请求（包括很多很多）String uri=req.getRequestURI();String methodName = new String(uri.substring(uri.lastIndexOf("/") + 1)).toString(); // 从 URI 中提取方法名System.out.println("获得的方法："+methodName);Method method=null;//通过反射获取被继承的类里面的所有方法Method[] methods=this.getClass().getDeclaredMethods();//获取请求头，方便及进行接下来的操作String contentType =req.getContentType();ObjectMapper objectMapper=new ObjectMapper();JsonNode jsonNode = null;if (contentType != null && contentType.startsWith("multipart/form-data")){System.out.println("如果是文件就不进行改变");}else {
//处理JSON 数据部分jsonNode = objectMapper.readTree(req.getReader());}for (Method method1 : methods){if("POST".equals(req.getMethod())){System.out.println("进入了POST请求"+"获取到的方法名为:"+methodName);if(method1.getAnnotation(POST.class)==null) {continue;}if(method1.getAnnotation(POST.class).value().equals(methodName)){System.out.println("进入了具体的方法里面");method = method1;Parameter[] parameters = method.getParameters();System.out.println("参数列表为:"+ parameters.length)Object[] args = new Object[parameters.length];for(int i=0;i<parameters.length; i++){Annotation[] annotations = parameters[i].getAnnotations();if(annotations == null || annotations.length == 0) {if (parameters[i].getType() == HttpServletRequest.class) {args[i] = req;} else if (parameters[i].getType() == HttpServletResponse.class) {args[i] = resp;}}else {for(Annotation annotation:annotations){if(annotation instanceof Param){String name=((Param)annotation).value();args[i]= request.getParameter(name);System.out.println(args[i]);

方法类：

public class SomeMethod {public User addUser(String UserName, String Email, String Password) throws IOException {//新增账号User user = new User();user.setUserName(UserName);user.setEmail(Email);user.setPassword(Password);//1.获取SqlSessionFactory//1.加载mybatis的核心配置文件，获取SqlSessionFaxtoryString resource = "mybatis-config.xml";InputStream inputStream = Resources.getResourceAsStream(resource);SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);//2.获取SqlSession 对象，用它来执行sqlSqlSession sqlSession = sqlSessionFactory.openSession();//在这里面其实是可以写true或者false的没写为f表示要手动提交//3.1获取UserMapper接口的代理对象UserMapper userMapper = sqlSession.getMapper((UserMapper.class));userMapper.add(user);//提交事务sqlSession.commit();//5.释放资源sqlSession.close();return user;}