com.zpf.tool.ReflectUtil Maven / Gradle / Ivy
package com.zpf.tool;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import java.lang.reflect.Array;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
public class ReflectUtil {
public static boolean setValue(@Nullable Object source, @NonNull Class target,
@NonNull String name, @Nullable Object value) {
Field field = null;
int modify = 0;
Field modifiersField = null;
boolean removeFinal = false;
boolean result = false;
try {
field = target.getDeclaredField(name);
modify = field.getModifiers();
//final修饰的基本类型不可修改
if (field.getType().isPrimitive() && Modifier.isFinal(modify)) {
return result;
}
//获取访问权限
if (!Modifier.isPublic(modify) || Modifier.isFinal(modify)) {
field.setAccessible(true);
}
//static final同时修饰
removeFinal = Modifier.isStatic(modify) && Modifier.isFinal(modify);
if (removeFinal) {
try {
modifiersField = Field.class.getDeclaredField("modifiers");
modifiersField.setAccessible(true);
modifiersField.setInt(field, modify & ~Modifier.FINAL);
} catch (NoSuchFieldException e) {
field.setAccessible(true);
}
}
//按照类型调用设置方法
Class fieldType = field.getType();
if (fieldType.isPrimitive()) {
if (int.class.isAssignableFrom(fieldType)) {
if (value instanceof Number) {
field.setInt(source, ((Number) value).intValue());
result = true;
}
} else if (float.class.isAssignableFrom(fieldType)) {
if (value instanceof Number) {
field.setFloat(source, ((Number) value).floatValue());
result = true;
}
} else if (double.class.isAssignableFrom(fieldType)) {
if (value instanceof Number) {
field.setDouble(source, ((Number) value).doubleValue());
result = true;
}
} else if (long.class.isAssignableFrom(fieldType)) {
if (value instanceof Number) {
field.setLong(source, ((Number) value).longValue());
}
} else if (short.class.isAssignableFrom(fieldType)) {
if (value instanceof Number) {
field.setShort(source, ((Number) value).shortValue());
result = true;
}
} else if (byte.class.isAssignableFrom(fieldType)) {
if (value != null && byte.class.isAssignableFrom(value.getClass())) {
field.setByte(source, (byte) value);
result = true;
}
} else if (char.class.isAssignableFrom(fieldType)) {
if (value != null && char.class.isAssignableFrom(value.getClass())) {
field.setChar(source, (char) value);
result = true;
}
} else if (boolean.class.isAssignableFrom(fieldType)) {
if (value != null && boolean.class.isAssignableFrom(value.getClass())) {
field.setBoolean(source, (boolean) value);
result = true;
}
}
} else if (fieldType.isArray()) {
if (value != null) {
if (fieldType.isInstance(value)) {
field.set(source, value);
} else {
int len = Array.getLength(value);
Object realValue = Array.newInstance(fieldType.getComponentType(), len);
for (int i = 0; i < len; i++) {
Array.set(realValue, i, Array.get(value, i));
}
field.set(source, realValue);
}
} else {
field.set(source, null);
}
} else {
field.set(source, value);
result = true;
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
//权限还原
if (field != null) {
if (removeFinal && modifiersField != null) {
modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
modifiersField.setAccessible(false);
}
if (!Modifier.isPublic(modify) || Modifier.isFinal(modify)) {
field.setAccessible(false);
}
}
} catch (IllegalAccessException e) {
//
}
}
return result;
}
}