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add ZeroPadding support

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Looly
2019-09-21 22:24:59 +08:00
parent 4292d3fd55
commit c9f77e1746
9 changed files with 362 additions and 161 deletions
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66
hutool-core/src/main/java/cn/hutool/core/util/ArrayUtil.java
View File

@@ -1,15 +1,15 @@
package cn.hutool.core.util;
import java.lang.reflect.Array;
import java.nio.ByteBuffer;
import java.util.*;
import cn.hutool.core.collection.CollectionUtil;
import cn.hutool.core.collection.IterUtil;
import cn.hutool.core.exceptions.UtilException;
import cn.hutool.core.lang.Editor;
import cn.hutool.core.lang.Filter;
import java.lang.reflect.Array;
import java.nio.ByteBuffer;
import java.util.*;
/**
* 数组工具类
*
@@ -494,15 +494,63 @@ public class ArrayUtil {
* 调整大小后拷贝原数组到新数组下。扩大则占位前N个位置，缩小则截断
*
* @param <T> 数组元素类型
* @param buffer 原数组
* @param data 原数组
* @param newSize 新的数组大小
* @param componentType 数组元素类型
* @return 调整后的新数组
*/
public static <T> T[] resize(T[] buffer, int newSize, Class<?> componentType) {
T[] newArray = newArray(componentType, newSize);
if (isNotEmpty(buffer)) {
System.arraycopy(buffer, 0, newArray, 0, Math.min(buffer.length, newSize));
public static <T> T[] resize(T[] data, int newSize, Class<?> componentType) {
if(newSize < 0){
return data;
}
final T[] newArray = newArray(componentType, newSize);
if (newSize > 0 && isNotEmpty(data)) {
System.arraycopy(data, 0, newArray, 0, Math.min(data.length, newSize));
}
return newArray;
}
/**
* 生成一个新的重新设置大小的数组<br>
* 调整大小后拷贝原数组到新数组下。扩大则占位前N个位置，其它位置补充0，缩小则截断
*
* @param array 原数组
* @param newSize 新的数组大小
* @return 调整后的新数组
* @since 4.6.7
*/
public static Object resize(Object array, int newSize) {
if(newSize < 0){
return array;
}
if (null == array) {
return null;
}
final int length = length(array);
final Object newArray = Array.newInstance(array.getClass().getComponentType(), newSize);
if (newSize > 0 && isNotEmpty(array)) {
System.arraycopy(array, 0, newArray, 0, Math.min(length, newSize));
}
return newArray;
}
/**
* 生成一个新的重新设置大小的数组<br>
* 调整大小后拷贝原数组到新数组下。扩大则占位前N个位置，其它位置补充0，缩小则截断
*
* @param bytes 原数组
* @param newSize 新的数组大小
* @return 调整后的新数组
* @since 4.6.7
*/
public static byte[] resize(byte[] bytes, int newSize) {
if(newSize < 0){
return bytes;
}
final byte[] newArray = new byte[newSize];
if (newSize > 0 && isNotEmpty(bytes)) {
System.arraycopy(bytes, 0, newArray, 0, Math.min(bytes.length, newSize));
}
return newArray;
}

10
hutool-core/src/main/java/cn/hutool/core/util/RandomUtil.java
View File

@@ -337,7 +337,7 @@ public class RandomUtil {
* @return 随机元素
*/
public static <T> List<T> randomEles(List<T> list, int count) {
final List<T> result = new ArrayList<T>(count);
final List<T> result = new ArrayList<>(count);
int limit = list.size();
while (result.size() < count) {
result.add(randomEle(list, limit));
@@ -361,7 +361,7 @@ public class RandomUtil {
throw new IllegalArgumentException("Count is larger than collection distinct size !");
}
final HashSet<T> result = new HashSet<T>(count);
final HashSet<T> result = new HashSet<>(count);
int limit = source.size();
while (result.size() < count) {
result.add(randomEle(source, limit));
@@ -409,14 +409,14 @@ public class RandomUtil {
* @return 随机字符串
*/
public static String randomString(String baseString, int length) {
final StringBuilder sb = new StringBuilder();
final StringBuilder sb = new StringBuilder(length);
if (length < 1) {
length = 1;
}
int baseLength = baseString.length();
for (int i = 0; i < length; i++) {
int number = getRandom().nextInt(baseLength);
int number = randomInt(baseLength);
sb.append(baseString.charAt(number));
}
return sb.toString();
@@ -450,7 +450,7 @@ public class RandomUtil {
* @since 3.1.2
*/
public static char randomChar(String baseString) {
return baseString.charAt(getRandom().nextInt(baseString.length()));
return baseString.charAt(randomInt(baseString.length()));
}
/**