新的一天

04. 后端Web基础(基础知识)/springboot-web-01/src/main/java/com/itheima/springbootweb01/SpringbootWeb01Application.java

@@ -3,7 +3,7 @@ package com.itheima.springbootweb01;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
-@SpringBootApplication
+@SpringBootApplication //
 public class SpringbootWeb01Application {
 
     public static void main(String[] args) {

04. 后端Web基础(基础知识)/springboot-web-01/src/main/java/com/itheima/springbootweb01/controller/UserController.java

@@ -4,6 +4,9 @@ import cn.hutool.core.io.IoUtil;
 import com.itheima.springbootweb01.pojo.User;
 import com.itheima.springbootweb01.service.UserService;
 import com.itheima.springbootweb01.service.lmpl.UserServiceImpl;
+import jakarta.annotation.Resource;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
@@ -28,7 +31,25 @@ public class UserController {
      * 接受请求 相应数据
      */
 
-    private UserService userService = new UserServiceImpl();
+//    @Qualifier("userServiceImpl")
+//    @Autowired
+//    private UserService userService;
+
+    @Resource(name = "userServiceImpl2")
+    private UserService userService;
+    //方式二：构造器注入
+//    private final UserService userService;
+//    @Autowired
+//    public UserController(UserService userService) {
+//        this.userService = userService;
+//    }
+
+    //方式三：setter注入
+//    private UserService userService;
+//    @Autowired
+//    public void setUserService(UserService userService) {
+//        this.userService = userService;
+//    }
 
     //    @RequestMapping("/list")
 //    public List<User> list() throws  Exception{

04. 后端Web基础(基础知识)/springboot-web-01/src/main/java/com/itheima/springbootweb01/dao/impl/UserDaoImpl.java

@@ -2,12 +2,18 @@ package com.itheima.springbootweb01.dao.impl;
 
 import cn.hutool.core.io.IoUtil;
 import com.itheima.springbootweb01.dao.UserDao;
+import org.springframework.stereotype.Component;
+import org.springframework.stereotype.Repository;
+import org.springframework.stereotype.Service;
 
 import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.List;
 
+//@Component // 将当前组件加入到Spring容器中
+//@Repository //将当前组件加入到Spring容器中
+@Service //将当前组件加入到Spring容器中
 public class UserDaoImpl implements UserDao {
     /**
      * 数据层

04. 后端Web基础(基础知识)/springboot-web-01/src/main/java/com/itheima/springbootweb01/service/lmpl/UserServiceImpl.java

@@ -4,16 +4,23 @@ import com.itheima.springbootweb01.dao.UserDao;
 import com.itheima.springbootweb01.dao.impl.UserDaoImpl;
 import com.itheima.springbootweb01.pojo.User;
 import com.itheima.springbootweb01.service.UserService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.AutoConfigureOrder;
+import org.springframework.stereotype.Component;
+import org.springframework.stereotype.Service;
 
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
 import java.util.List;
+@Service
 
 public class UserServiceImpl implements UserService {
     /**
      * 业务逻辑层
      */
-    private UserDao userDao = new UserDaoImpl();
+
+    @Autowired // 自动注入
+    private UserDao userDao;
     @Override
     public List<User> findAll() {
         //1.加载Dao层数据

04. 后端Web基础(基础知识)/springboot-web-01/src/main/java/com/itheima/springbootweb01/service/lmpl/UserServiceImpl2.java

@@ -0,0 +1,43 @@
+package com.itheima.springbootweb01.service.lmpl;
+
+import com.itheima.springbootweb01.dao.UserDao;
+import com.itheima.springbootweb01.pojo.User;
+import com.itheima.springbootweb01.service.UserService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Primary;
+import org.springframework.stereotype.Component;
+import org.springframework.stereotype.Service;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.List;
+
+@Service
+//@Primary
+
+public class UserServiceImpl2 implements UserService {
+    /**
+     * 业务逻辑层
+     */
+
+    @Autowired // 自动注入
+    private UserDao userDao;
+    @Override
+    public List<User> findAll() {
+        //1.加载Dao层数据
+        List<String> lines = userDao.findAll();
+
+        //2.将用户数据封装成User对象 ->list集合
+        List<User> userList= lines.stream().map(line -> {
+            String[] split = line.split(",");
+            Integer id = Integer.parseInt(split[0]);
+            String username = split[1];
+            String password = split[2];
+            String name = split[3];
+            Integer age = Integer.parseInt(split[4]);
+            LocalDateTime updateTime = LocalDateTime.parse(split[5], DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
+            return new User(id+200, username, password, name, age, updateTime);
+        }).toList();
+        return userList;
+    }
+}