From 0185f120889f2801bc410724eac0491dbbfe5ec3 Mon Sep 17 00:00:00 2001
From: fuhouyin <fuhouyin1230@126.com>
Date: Fri, 22 Sep 2023 09:55:44 +0800
Subject: [PATCH] :tada: add new utils

---
 README.md                              |  6 +++
 src/main/java/utils/CamelCaseUtil.java | 51 ++++++++++++++++++++++++++
 src/main/java/utils/EntityUtil.java    | 22 +++++++++++
 3 files changed, 79 insertions(+)
 create mode 100644 src/main/java/utils/CamelCaseUtil.java
 create mode 100644 src/main/java/utils/EntityUtil.java

diff --git a/README.md b/README.md
index 41433c7..4338ea1 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,12 @@
 ### redis工具
     utils.redis.RedisCacheUtils
 
+### 字符串处理工具
+    utils.CamelCAsseUtil 将下划线分割字符串转为驼峰式 （aaa_bbb_ccc => aaaBbbCcc）
+    
+### 类型转换工具
+    utils.EntityUtil 将实体类转为map <String, Object>
+
 ### 自动生成数据库所有实体类
     autoentity.pom.xml
     基于jOOQ的自动生成实体类功能，添加pom文件或者修改至自己的pom文件中，maven打包即可在对应处生成实体类
diff --git a/src/main/java/utils/CamelCaseUtil.java b/src/main/java/utils/CamelCaseUtil.java
new file mode 100644
index 0000000..bffc704
--- /dev/null
+++ b/src/main/java/utils/CamelCaseUtil.java
@@ -0,0 +1,51 @@
+package utils;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class CamelCaseUtil {
+
+    /**
+     * 数据表字段名转换为驼峰式名字的实体类属性名
+     * @param tabAttr   数据表字段名
+     * @return  转换后的驼峰式命名
+     */
+    public static String camelize(String tabAttr){
+        if(isBlank(tabAttr))
+            return tabAttr;
+        Pattern pattern = Pattern.compile("(.*)_(\\w)(.*)");
+        Matcher matcher = pattern.matcher(tabAttr);
+        if(matcher.find()){
+            return camelize(matcher.group(1) + matcher.group(2).toUpperCase() + matcher.group(3));
+        }else{
+            return tabAttr;
+        }
+    }
+
+    /**
+     * 驼峰式的实体类属性名转换为数据表字段名
+     * @param camelCaseStr  驼峰式的实体类属性名
+     * @return  转换后的以"_"分隔的数据表字段名
+     */
+    public static String decamelize(String camelCaseStr){
+        return isBlank(camelCaseStr) ? camelCaseStr : camelCaseStr.replaceAll("[A-Z]", "_$0").toLowerCase();
+    }
+
+    /**
+     * 字符串是否为空
+     * @param cs   待检查的字符串
+     * @return  空：true; 非空：false
+     */
+    public static boolean isBlank(final CharSequence cs) {
+        int strLen;
+        if (cs == null || (strLen = cs.length()) == 0) {
+            return true;
+        }
+        for (int i = 0; i < strLen; i++) {
+            if (!Character.isWhitespace(cs.charAt(i))) {
+                return false;
+            }
+        }
+        return true;
+    }
+}
diff --git a/src/main/java/utils/EntityUtil.java b/src/main/java/utils/EntityUtil.java
new file mode 100644
index 0000000..92d1ea0
--- /dev/null
+++ b/src/main/java/utils/EntityUtil.java
@@ -0,0 +1,22 @@
+package utils;
+
+import java.lang.reflect.Field;
+import java.util.HashMap;
+import java.util.Map;
+
+public class EntityUtil {
+
+    public static Map<String, Object> entityToMap(Object entity) {
+        Map<String, Object> result = new HashMap<>();
+        Field[] fields = entity.getClass().getDeclaredFields();
+        for (Field field : fields) {
+            field.setAccessible(true);
+            try {
+                result.put(field.getName(), field.get(entity));
+            } catch (IllegalAccessException e) {
+                e.printStackTrace();
+            }
+        }
+        return result;
+    }
+}