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Merge pull request #4138 from sunshineflymeat/hutool-1120

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Fix issue 4137
This commit is contained in:
Golden Looly
2025-11-23 23:23:10 +08:00
committed by GitHub
parent eec6056876 ed27c637b2
commit 1a7d522dff
2 changed files with 39 additions and 0 deletions
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6
hutool-core/src/main/java/cn/hutool/core/util/TypeUtil.java
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@@ -34,6 +34,12 @@ public class TypeUtil {
return (Class<?>) type;
} else if (type instanceof ParameterizedType) {
return (Class<?>) ((ParameterizedType) type).getRawType();
} else if (type instanceof GenericArrayType) {
final Type componentType = ((GenericArrayType) type).getGenericComponentType();
final Class<?> componentClass = getClass(componentType);
if (componentClass != null) {
return Array.newInstance(componentClass, 0).getClass();
}
} else if (type instanceof TypeVariable) {
Type[] bounds = ((TypeVariable<?>) type).getBounds();
if (bounds.length == 1) {

33
hutool-core/src/test/java/cn/hutool/core/util/TypeUtilTest.java
View File

@@ -1,5 +1,7 @@
package cn.hutool.core.util;
import java.lang.reflect.Array;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.ArrayList;
@@ -47,6 +49,37 @@ public class TypeUtilTest {
assertEquals(Object.class, clazz);
}
/**
* 测试getClass方法对泛型数组类型T[]的处理
* 验证未绑定泛型参数的数组类型会被正确解析为Object[]
*/
@Test
public void getClassForGenericArrayTypeTest() throws NoSuchFieldException {
// 获取T[]类型字段的泛型类型
Field levelField = GenericArray.class.getDeclaredField("level");
Type genericArrayType = levelField.getGenericType();
// 调用getClass方法处理GenericArrayType
Class<?> clazz = TypeUtil.getClass(genericArrayType);
// 验证返回Object[]类型
assertNotNull(clazz, "getClass方法返回null");
assertTrue(clazz.isArray(), "返回类型不是数组");
assertEquals(Object.class, clazz.getComponentType(), "数组组件类型应为Object");
}
/**
* 测试getClass方法对参数化类型数组List<String>[]的处理
* 验证数组组件类型能正确解析为原始类型
*/
@Test
public void getClassForParameterizedArrayTypeTest() {
// 创建List<String>[]类型引用
Type genericArrayType = new TypeReference<List<String>[]>() {}.getType();
// 调用getClass方法处理GenericArrayType
Class<?> clazz = TypeUtil.getClass(genericArrayType);
// 验证返回List[]类型
assertEquals(Array.newInstance(List.class, 0).getClass(), clazz);
}
public static class TestClass {
public List<String> getList() {
return new ArrayList<>();