Merge pull request '#002线性查找和二分查找' (#4) from feature_20220721 into master

Reviewed-on: https://gitme.fun/sawyergore/sawyerHomeWork/pulls/4

data_structure/src/main/java/sort/TestBinarySearch.java

@@ -0,0 +1,49 @@
+package sort;
+
+/**
+ * 二分查找,对于目标数组必须有序
+ * @author Sawyer
+ * @date 2022/7/22
+ */
+public class TestBinarySearch {
+    public static void main(String[] args) {
+        //目标数组
+        int [] arr = new int []{1,2,3,4,5,6,7,8,9};
+        //目标元素
+        int target = 8;
+        //目标元素下标
+        int index = -1;
+        //记录开始位置
+        int begin = 0;
+        //记录结束位置
+        int end = arr.length-1;
+        //记录中间位置
+        int mid = (begin+end)/2;
+        int i =0;
+        //循环查找
+        while (i<arr.length){
+            //判断中间的元素是不是要查找的元素
+            if(arr[mid]==target){
+                index = mid;
+                break;
+                //不是要查找的元素
+            }else {
+                //判断中间元素是否比目标元素大
+                if(arr[mid]>target){
+                    //把结束位置调整到中间位置前一个位置
+                    end = mid-1;
+                    //中间这个元素比目标元素小
+                }else {
+                    //把开始位置调整到中间位置的后一个位置
+                    begin = mid+1;
+                }
+                //取出新的中间位置
+                mid=(begin+end)/2;
+                i++;
+
+            }
+        }
+        System.out.println("index:"+index);
+
+    }
+}

data_structure/src/main/java/sort/TestSearch.java

@@ -0,0 +1,28 @@
+package sort;
+
+/**
+ * 线性查找
+ * @author Sawyer
+ * @date 2022/7/22
+ */
+public class TestSearch {
+    public static void main(String[] args) {
+        /*
+          目标数组
+         */
+        int[] arr = new int[]{1,2,3,4,5,6,7};
+        //目标元素
+        int target=3;
+        //目标元素所在下标
+        int index=-1;
+        for (int j : arr) {
+            if (j == target) {
+                index = target;
+                break;
+            }
+        }
+        //打印目标元素下标
+        System.out.println("index"+index);
+    }
+
+}

h2db/src/main/java/com/example/h2db/H2dbApplication.java

@@ -1,7 +1,6 @@
 package com.example.h2db;
 
 import org.mybatis.spring.annotation.MapperScan;
-import org.mybatis.spring.annotation.MapperScans;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 

h2db/src/main/java/com/example/h2db/entity/User.java

@@ -1,9 +1,5 @@
 package com.example.h2db.entity;
 
-import com.baomidou.mybatisplus.annotation.IdType;
-import com.baomidou.mybatisplus.annotation.TableField;
-import com.baomidou.mybatisplus.annotation.TableId;
-import com.baomidou.mybatisplus.annotation.TableName;
 import lombok.Data;
 
 /**