测试mybatis plus

src/main/java/com/example/Thread/Thread03.java

@@ -0,0 +1,31 @@
+package com.example.Thread;
+
+public class Thread03 {
+    public static void main(String[] args) {
+        C1 c1 = new C1();
+        Thread thread = new Thread(c1);
+        thread.start();
+    }
+}
+// 1s输出helloworld
+class C1 implements Runnable {
+    int i = 0;
+    @Override
+    public void run() {
+        while (true) {
+            try {
+                Thread.sleep(1000);
+                System.out.println("hello1");
+                i++;
+
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+            if(i>3) {
+                break;
+            }
+
+        }
+
+    }
+}

src/main/java/com/example/demo/handler/SpringScheduleHandler.java

@@ -0,0 +1,14 @@
+package com.example.demo.handler;
+
+import org.springframework.scheduling.annotation.EnableScheduling;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Component;
+
+@Component
+//@EnableScheduling
+public class SpringScheduleHandler {
+    @Scheduled(cron = "*/5 * * * * *")
+    public void exe() {
+        System.out.println("exe");
+    }
+}

src/main/java/com/example/singletone/LazySingletonOpt.java

@@ -0,0 +1,26 @@
+package com.example.singletone;
+
+public class LazySingletonOpt {
+    public static void main(String[] args) {
+        LazySingleton singleton1 = LazySingleton.getInstance();
+        LazySingleton singleton2 = LazySingleton.getInstance();
+        if(singleton1 == singleton2) {
+
+        }
+        System.out.println(singleton1.hashCode());
+        System.out.println(singleton2.hashCode());
+    }
+}
+// 懒汉式
+class LazySingleton {
+    private static LazySingleton lazySingleton = null;
+    private LazySingleton() {};
+    // 判断使用到该方法时再进行创建 lazySingleton
+    public static synchronized LazySingleton getInstance() {
+        if(lazySingleton == null) {
+            lazySingleton = new LazySingleton();
+        }
+        return lazySingleton;
+    }
+
+}

src/main/java/com/example/singletone/Singleton1.java

@@ -0,0 +1,21 @@
+package com.example.singletone;
+public class Singleton1 {
+    public static void main(String[] args) {
+        HungrySingle single1 = HungrySingle.getInstance();
+        HungrySingle single2 = HungrySingle.getInstance();
+        if(single1 == single2) {
+
+        }
+    }
+}
+// 饿汉式(静态变量式)
+class HungrySingle {
+   // 构造函数私有
+    private HungrySingle() {
+    }
+    private static final HungrySingle hungrySingle = new HungrySingle();
+    // 返回instance
+    public static HungrySingle getInstance() {
+        return hungrySingle;
+    }
+}

src/main/java/com/example/springbootdemo/controller/ColorController.java

@@ -0,0 +1,20 @@
+package com.example.springbootdemo.controller;
+
+import com.example.springbootdemo.entity.Color;
+import com.example.springbootdemo.service.ColorService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class ColorController {
+    @Autowired
+    ColorService colorService;
+
+    @GetMapping("/getColorInfo")
+    public Color getColorInfo(@RequestParam("color_id") Integer colorId) {
+        return colorService.getById(colorId);
+    }
+
+}

src/main/java/com/example/springbootdemo/entity/Color.java

@@ -0,0 +1,18 @@
+package com.example.springbootdemo.entity;
+
+import com.baomidou.mybatisplus.annotation.TableId;
+import com.baomidou.mybatisplus.annotation.TableName;
+import lombok.Data;
+
+import javax.persistence.GeneratedValue;
+@Data
+public class Color {
+    @TableId
+    @GeneratedValue
+    private Integer colorId;
+    private String colorName;
+    private Integer colorStatus;
+    private String colorType;
+    private String colorCode;
+    private Integer companyId;
+}

src/main/java/com/example/springbootdemo/mapper/ColorMapper.java

@@ -0,0 +1,10 @@
+package com.example.springbootdemo.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.example.springbootdemo.entity.Color;
+import org.apache.ibatis.annotations.Mapper;
+
+@Mapper
+public interface ColorMapper extends BaseMapper<Color> {
+
+}

src/main/java/com/example/springbootdemo/service/ColorService.java

@@ -0,0 +1,7 @@
+package com.example.springbootdemo.service;
+
+import com.baomidou.mybatisplus.extension.service.IService;
+import com.example.springbootdemo.entity.Color;
+
+public interface ColorService extends IService<Color> {
+}

src/main/java/com/example/springbootdemo/service/impl/ColorServiceImpl.java

@@ -0,0 +1,11 @@
+package com.example.springbootdemo.service.impl;
+
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import com.example.springbootdemo.entity.Color;
+import com.example.springbootdemo.mapper.ColorMapper;
+import com.example.springbootdemo.service.ColorService;
+import org.springframework.stereotype.Service;
+
+@Service
+public class ColorServiceImpl extends ServiceImpl<ColorMapper, Color> implements ColorService {
+}

src/main/resources/application-dev.yml

@@ -18,7 +18,7 @@ spring:
         login-username: zxy
         login-password: 123456
       driver-class-name: com.mysql.cj.jdbc.Driver
-      url: jdbc:mysql://localhost:3306/ceshi?zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
+      url: jdbc:mysql://localhost:3306/test?zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
       username: root
       password:
   jpa:
@@ -32,4 +32,8 @@ mybatis:
     map-underscore-to-camel-case: true
 #mybatis-plus:
 #  configuration:
-#    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
+#    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
+mybatis-plus:
+  global-config:
+    db-config:
+      table-prefix: wb_tbl_

src/main/resources/application.yml

@@ -11,9 +11,9 @@ server:
   port: 8081
 spring:
   datasource:
-    url: jdbc:mysql://192.168.2.130:3306/ceshi?zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
+    url: jdbc:mysql://localhost:3306/test?zeroDateTimeBehavior=convertToNull&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
     username: root
-    password: 123456
+    password:
     driver-class-name: com.mysql.cj.jdbc.Driver
   jpa:
     database-platform: org.hibernate.dialect.MySQL5InnoDBDialect