diff --git a/common/src/main/java/com/alibaba/nacos/common/utils/NumberUtil.java b/common/src/main/java/com/alibaba/nacos/common/utils/NumberUtil.java
deleted file mode 100644
index 36c26bcbf..000000000
--- a/common/src/main/java/com/alibaba/nacos/common/utils/NumberUtil.java
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * Copyright 1999-2020 Alibaba Group Holding Ltd.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.alibaba.nacos.common.utils;
-
-/**
- * Nacos number util.
- *
- * @author xiweng.yy
- */
-public class NumberUtil {
-
- /**
- * Whether all chars of input string is digit.
- *
- * @param input {@code String} checked
- * @return {@code true} if all chars is digit, otherwise false
- */
- public static boolean isDigits(String input) {
- if (StringUtils.isEmpty(input)) {
- return false;
- }
- for (int i = 0; i < input.length(); i++) {
- if (!Character.isDigit(input.charAt(i))) {
- return false;
- }
- }
- return true;
- }
-
-}
diff --git a/common/src/main/java/com/alibaba/nacos/common/utils/NumberUtils.java b/common/src/main/java/com/alibaba/nacos/common/utils/NumberUtils.java
new file mode 100644
index 000000000..04cfc7a9a
--- /dev/null
+++ b/common/src/main/java/com/alibaba/nacos/common/utils/NumberUtils.java
@@ -0,0 +1,146 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.alibaba.nacos.common.utils;
+
+/**
+ * Number utils.
+ * @author zzq
+ */
+public class NumberUtils {
+
+ /**
+ * Convert a String to an int, returning
+ * zero if the conversion fails.
+ *
+ * @param str the string to convert, may be null
+ * @return the int represented by the string, or zero if
+ * conversion fails
+ */
+ public static int toInt(String str) {
+ return toInt(str, 0);
+ }
+
+ /**
+ * Convert a String to an int, returning a
+ * default value if the conversion fails.
+ *
+ * @param str the string to convert, may be null
+ * @param defaultValue the default value
+ * @return the int represented by the string, or the default if conversion fails
+ */
+ public static int toInt(String str, int defaultValue) {
+ if (str == null) {
+ return defaultValue;
+ }
+ try {
+ return Integer.parseInt(str);
+ } catch (NumberFormatException nfe) {
+ return defaultValue;
+ }
+ }
+
+ /**
+ * Convert a String to a long, returning a
+ * default value if the conversion fails.
+ *
+ * @param str the string to convert, may be null
+ * @param defaultValue the default value
+ * @return the long represented by the string, or the default if conversion fails
+ */
+ public static long toLong(String str, long defaultValue) {
+ if (str == null) {
+ return defaultValue;
+ }
+ try {
+ return Long.parseLong(str);
+ } catch (NumberFormatException nfe) {
+ return defaultValue;
+ }
+ }
+
+ /**
+ * Convert a String to a double, returning a
+ * default value if the conversion fails.
+ *
+ * @param str the string to convert, may be null
+ * @param defaultValue the default value
+ * @return the double represented by the string, or defaultValue
+ * if conversion fails
+ */
+ public static double toDouble(String str, double defaultValue) {
+ if (str == null) {
+ return defaultValue;
+ }
+ try {
+ return Double.parseDouble(str);
+ } catch (NumberFormatException nfe) {
+ return defaultValue;
+ }
+ }
+
+ /**
+ * Checks whether the String contains only
+ * digit characters.
+ *
+ * @param str the String to check
+ * @return true if str contains only unicode numeric
+ */
+ public static boolean isDigits(String str) {
+ if (StringUtils.isEmpty(str)) {
+ return false;
+ }
+ for (int i = 0; i < str.length(); i++) {
+ if (!Character.isDigit(str.charAt(i))) {
+ return false;
+ }
+ }
+ return true;
+ }
+
+ /**
+ * Convert a String to a float, returning
+ * 0.0f if the conversion fails.
+ *
+ * @param str the string to convert, may be null
+ * @return the float represented by the string, or 0.0f
+ * if conversion fails
+ */
+ public static float toFloat(final String str) {
+ return toFloat(str, 0.0f);
+ }
+
+ /**
+ * Convert a String to a float, returning a
+ * default value if the conversion fails.
+ *
+ * @param str the string to convert, may be null
+ * @param defaultValue the default value
+ * @return the float represented by the string, or defaultValue
+ * if conversion fails
+ */
+ public static float toFloat(final String str, final float defaultValue) {
+ if (str == null) {
+ return defaultValue;
+ }
+ try {
+ return Float.parseFloat(str);
+ } catch (final NumberFormatException nfe) {
+ return defaultValue;
+ }
+ }
+
+}
diff --git a/common/src/test/java/com/alibaba/nacos/common/utils/NumberUtilsTest.java b/common/src/test/java/com/alibaba/nacos/common/utils/NumberUtilsTest.java
new file mode 100644
index 000000000..8016e0b47
--- /dev/null
+++ b/common/src/test/java/com/alibaba/nacos/common/utils/NumberUtilsTest.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright 1999-2020 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.alibaba.nacos.common.utils;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Number utils.
+ * @author zzq
+ */
+public class NumberUtilsTest {
+
+ @Test
+ public void testToInt() {
+ Assert.assertEquals(0, NumberUtils.toInt(null));
+ Assert.assertEquals(0, NumberUtils.toInt(StringUtils.EMPTY));
+ Assert.assertEquals(1, NumberUtils.toInt("1"));
+ }
+
+ @Test
+ public void testTestToInt() {
+ Assert.assertEquals(1, NumberUtils.toInt(null, 1));
+ Assert.assertEquals(1, NumberUtils.toInt("", 1));
+ Assert.assertEquals(1, NumberUtils.toInt("1", 0));
+ }
+
+ @Test
+ public void testToLong() {
+ Assert.assertEquals(1L, NumberUtils.toLong(null, 1L));
+ Assert.assertEquals(1L, NumberUtils.toLong("", 1L));
+ Assert.assertEquals(1L, NumberUtils.toLong("1", 0L));
+ }
+
+ @Test
+ public void testToDouble() {
+ Assert.assertEquals(1.1d, NumberUtils.toDouble(null, 1.1d), 0);
+ Assert.assertEquals(1.1d, NumberUtils.toDouble("", 1.1d), 0);
+ Assert.assertEquals(1.5d, NumberUtils.toDouble("1.5", 0.0d), 0);
+ }
+
+ @Test
+ public void testIsDigits() {
+ Assert.assertFalse(NumberUtils.isDigits(null));
+ Assert.assertFalse(NumberUtils.isDigits(""));
+ Assert.assertTrue(NumberUtils.isDigits("12345"));
+ Assert.assertFalse(NumberUtils.isDigits("1234.5"));
+ Assert.assertFalse(NumberUtils.isDigits("1ab"));
+ Assert.assertFalse(NumberUtils.isDigits("abc"));
+ }
+
+ @Test
+ public void testToFloatString() {
+ Assert.assertEquals(NumberUtils.toFloat("-1.2345"), -1.2345f, 0);
+ Assert.assertEquals(1.2345f, NumberUtils.toFloat("1.2345"), 0);
+ Assert.assertEquals(0.0f, NumberUtils.toFloat("abc"), 0);
+
+ Assert.assertEquals(NumberUtils.toFloat("-001.2345"), -1.2345f, 0);
+ Assert.assertEquals(1.2345f, NumberUtils.toFloat("+001.2345"), 0);
+ Assert.assertEquals(1.2345f, NumberUtils.toFloat("001.2345"), 0);
+ Assert.assertEquals(0f, NumberUtils.toFloat("000.00"), 0);
+
+ Assert.assertEquals(NumberUtils.toFloat(Float.MAX_VALUE + ""), Float.MAX_VALUE, 0);
+ Assert.assertEquals(NumberUtils.toFloat(Float.MIN_VALUE + ""), Float.MIN_VALUE, 0);
+ Assert.assertEquals(0.0f, NumberUtils.toFloat(""), 0);
+ Assert.assertEquals(0.0f, NumberUtils.toFloat(null), 0);
+ }
+
+ @Test
+ public void testToFloatStringString() {
+ Assert.assertEquals(1.2345f, NumberUtils.toFloat("1.2345", 5.1f), 0);
+ Assert.assertEquals(5.0f, NumberUtils.toFloat("a", 5.0f), 0);
+ // LANG-1060
+ Assert.assertEquals(5.0f, NumberUtils.toFloat("-001Z.2345", 5.0f), 0);
+ Assert.assertEquals(5.0f, NumberUtils.toFloat("+001AB.2345", 5.0f), 0);
+ Assert.assertEquals(5.0f, NumberUtils.toFloat("001Z.2345", 5.0f), 0);
+ }
+
+}
diff --git a/core/src/main/java/com/alibaba/nacos/core/utils/RemoteUtils.java b/core/src/main/java/com/alibaba/nacos/core/utils/RemoteUtils.java
index 2993a8793..863ee2872 100644
--- a/core/src/main/java/com/alibaba/nacos/core/utils/RemoteUtils.java
+++ b/core/src/main/java/com/alibaba/nacos/core/utils/RemoteUtils.java
@@ -16,7 +16,7 @@
package com.alibaba.nacos.core.utils;
-import com.alibaba.nacos.common.utils.NumberUtil;
+import com.alibaba.nacos.common.utils.NumberUtils;
/**
* util of remote.
@@ -45,7 +45,7 @@ public class RemoteUtils {
*/
public static int getRemoteExecutorTimesOfProcessors() {
String timesString = System.getProperty("remote.executor.times.of.processors");
- if (NumberUtil.isDigits(timesString)) {
+ if (NumberUtils.isDigits(timesString)) {
int times = Integer.parseInt(timesString);
return times > 0 ? times : REMOTE_EXECUTOR_TIMES_OF_PROCESSORS;
} else {
@@ -55,7 +55,7 @@ public class RemoteUtils {
public static int getRemoteExecutorQueueSize() {
String queueSizeString = System.getProperty("remote.executor.queue.size");
- if (NumberUtil.isDigits(queueSizeString)) {
+ if (NumberUtils.isDigits(queueSizeString)) {
int size = Integer.parseInt(queueSizeString);
return size > 0 ? size : REMOTE_EXECUTOR_QUEUE_SIZE;
} else {