diff --git a/src/main/java/xyz/zhouxy/plusone/validator/BoolValidator.java b/src/main/java/xyz/zhouxy/plusone/validator/BoolValidator.java
index 9156a49..37bc4ca 100644
--- a/src/main/java/xyz/zhouxy/plusone/validator/BoolValidator.java
+++ b/src/main/java/xyz/zhouxy/plusone/validator/BoolValidator.java
@@ -3,7 +3,7 @@ package xyz.zhouxy.plusone.validator;
 import java.util.function.Function;
 import java.util.function.Supplier;
 
-class BoolValidator<DTO> extends PropertyValidator<DTO, Boolean, BoolValidator<DTO>> {
+public class BoolValidator<DTO> extends PropertyValidator<DTO, Boolean, BoolValidator<DTO>> {
 
     BoolValidator(Function<DTO, Boolean> getter) {
         super(getter);
diff --git a/src/main/java/xyz/zhouxy/plusone/validator/CollectionValidator.java b/src/main/java/xyz/zhouxy/plusone/validator/CollectionValidator.java
index bf2136b..f033c92 100644
--- a/src/main/java/xyz/zhouxy/plusone/validator/CollectionValidator.java
+++ b/src/main/java/xyz/zhouxy/plusone/validator/CollectionValidator.java
@@ -4,15 +4,11 @@ import java.util.Collection;
 import java.util.function.Function;
 import java.util.function.Supplier;
 
-class CollectionValidator<DTO, T> extends PropertyValidator<DTO, Collection<T>, CollectionValidator<DTO, T>> {
+public class CollectionValidator<DTO, T> extends PropertyValidator<DTO, Collection<T>, CollectionValidator<DTO, T>> {
 
     CollectionValidator(Function<DTO, Collection<T>> getter) {
         super(getter);
     }
-    
-    // ================================
-    // ====== Collection, String ======
-    // ================================
 
     // ====== notEmpty =====
 
diff --git a/src/main/java/xyz/zhouxy/plusone/validator/DoubleValidator.java b/src/main/java/xyz/zhouxy/plusone/validator/DoubleValidator.java
index ac78fac..3ad5173 100644
--- a/src/main/java/xyz/zhouxy/plusone/validator/DoubleValidator.java
+++ b/src/main/java/xyz/zhouxy/plusone/validator/DoubleValidator.java
@@ -3,7 +3,7 @@ package xyz.zhouxy.plusone.validator;
 import java.util.function.Function;
 import java.util.function.Supplier;
 
-class DoubleValidator<DTO> extends PropertyValidator<DTO, Double, DoubleValidator<DTO>> {
+public class DoubleValidator<DTO> extends PropertyValidator<DTO, Double, DoubleValidator<DTO>> {
 
     DoubleValidator(Function<DTO, Double> getter) {
         super(getter);
diff --git a/src/main/java/xyz/zhouxy/plusone/validator/IntValidator.java b/src/main/java/xyz/zhouxy/plusone/validator/IntValidator.java
index 59f6e1f..980726f 100644
--- a/src/main/java/xyz/zhouxy/plusone/validator/IntValidator.java
+++ b/src/main/java/xyz/zhouxy/plusone/validator/IntValidator.java
@@ -3,7 +3,7 @@ package xyz.zhouxy.plusone.validator;
 import java.util.function.Function;
 import java.util.function.Supplier;
 
-class IntValidator<DTO> extends PropertyValidator<DTO, Integer, IntValidator<DTO>> {
+public class IntValidator<DTO> extends PropertyValidator<DTO, Integer, IntValidator<DTO>> {
 
     IntValidator(Function<DTO, Integer> getter) {
         super(getter);
diff --git a/src/main/java/xyz/zhouxy/plusone/validator/ObjectValidator.java b/src/main/java/xyz/zhouxy/plusone/validator/ObjectValidator.java
index bf4c36d..8e9cbc4 100644
--- a/src/main/java/xyz/zhouxy/plusone/validator/ObjectValidator.java
+++ b/src/main/java/xyz/zhouxy/plusone/validator/ObjectValidator.java
@@ -2,7 +2,7 @@ package xyz.zhouxy.plusone.validator;
 
 import java.util.function.Function;
 
-class ObjectValidator<DTO, T> extends PropertyValidator<DTO, T, ObjectValidator<DTO, T>> {
+public class ObjectValidator<DTO, T> extends PropertyValidator<DTO, T, ObjectValidator<DTO, T>> {
 
     ObjectValidator(Function<DTO, T> getter) {
         super(getter);
diff --git a/src/main/java/xyz/zhouxy/plusone/validator/StringValidator.java b/src/main/java/xyz/zhouxy/plusone/validator/StringValidator.java
index dec88dc..ef9ecae 100644
--- a/src/main/java/xyz/zhouxy/plusone/validator/StringValidator.java
+++ b/src/main/java/xyz/zhouxy/plusone/validator/StringValidator.java
@@ -8,7 +8,7 @@ import cn.hutool.core.util.StrUtil;
 import xyz.zhouxy.plusone.constant.RegexConsts;
 import xyz.zhouxy.plusone.util.RegexUtil;
 
-class StringValidator<DTO> extends PropertyValidator<DTO, String, StringValidator<DTO>> {
+public class StringValidator<DTO> extends PropertyValidator<DTO, String, StringValidator<DTO>> {
 
     StringValidator(Function<DTO, String> getter) {
         super(getter);
diff --git a/src/test/java/xyz/zhouxy/plusone/validator/BaseValidatorTest.java b/src/test/java/xyz/zhouxy/plusone/validator/test/BaseValidatorTest.java
similarity index 93%
rename from src/test/java/xyz/zhouxy/plusone/validator/BaseValidatorTest.java
rename to src/test/java/xyz/zhouxy/plusone/validator/test/BaseValidatorTest.java
index d3c95d1..8bb0f07 100644
--- a/src/test/java/xyz/zhouxy/plusone/validator/BaseValidatorTest.java
+++ b/src/test/java/xyz/zhouxy/plusone/validator/test/BaseValidatorTest.java
@@ -1,4 +1,4 @@
-package xyz.zhouxy.plusone.validator;
+package xyz.zhouxy.plusone.validator.test;
 
 import java.util.Arrays;
 import java.util.List;
@@ -7,11 +7,13 @@ import java.util.Objects;
 import org.junit.Test;
 
 import xyz.zhouxy.plusone.constant.RegexConsts;
+import xyz.zhouxy.plusone.validator.BaseValidator;
+import xyz.zhouxy.plusone.validator.IValidateRequired;
 
 public class BaseValidatorTest {
     @Test
     public void testRuleFor() {
-        RegisterCommand registerCommand = new RegisterCommand("me", "luquanlion@outlook.com", "22336", "A1b2C3d4",
+        RegisterCommand registerCommand = new RegisterCommand("zhouxy108", "luquanlion@outlook.com", "22336", "A1b2C3d4",
                 "A1b2C3d4",
                 Arrays.asList(new String[] { "admin", "editor" }));
         registerCommand.validate();