修复了mybait-plus在修改与添加时报错:字符集错误,原因,在使用以上方法时会调用类型转换接口但并不会使用默认字符集,而是给null

src/main/java/com/muyu/common/core/text/Convert.java

@@ -1,5 +1,6 @@
 package com.muyu.common.core.text;
 
+import com.muyu.common.core.constant.Constants;
 import com.muyu.common.core.utils.StringUtils;
 import lombok.extern.slf4j.Slf4j;
 
@@ -689,11 +690,9 @@ public class Convert {
      * @return 字符串
      */
     public static String str (Object obj, String charsetName) {
-        System.out.println(obj);
         try{
-            return str(obj, Charset.forName(charsetName));
+            return str(obj, Charset.forName(charsetName.isEmpty()? Constants.UTF8 : charsetName));
         }catch (Exception exception){
-            System.out.println("字符转换异常: [{"+obj+"}-{"+charsetName+"}] -> {"+exception.getMessage()+"}");
             log.error("字符转换异常: [{}-{}] -> {}",obj,charsetName,exception.getMessage(),exception);
             throw new RuntimeException(exception);
         }