不在类初始化时就生成 Cipher。

pom.xml

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
     <groupId>xyz.zhouxy.plusone</groupId>
@@ -18,6 +17,7 @@
         <guava.version>32.0.1-jre</guava.version>
         <google-jsr305.version>3.0.2</google-jsr305.version>
         <joda-time.version>2.12.5</joda-time.version>
+        <jbcrypt.version>0.4</jbcrypt.version>
     </properties>
 
     <dependencies>
@@ -52,6 +52,14 @@
             <optional>true</optional>
         </dependency>
 
+        <dependency>
+            <groupId>org.mindrot</groupId>
+            <artifactId>jbcrypt</artifactId>
+            <version>${jbcrypt.version}</version>
+        </dependency>
+
+        <!-- test use only -->
+
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>

src/main/java/xyz/zhouxy/plusone/commons/annotation/ReaderMethod.java

@@ -5,7 +5,15 @@ import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 
-// TODO 添加 Javadoc
+/**
+ * ReaderMethod
+ *
+ * <p>
+ * 标识方法是读方法，如 getter。
+ *
+ * @author <a href="http://zhouxy.xyz:3000/ZhouXY108">ZhouXY</a>
+ * @since 1.0
+ */
 @Target(ElementType.METHOD)
 @Retention(RetentionPolicy.RUNTIME)
 public @interface ReaderMethod {

src/main/java/xyz/zhouxy/plusone/commons/annotation/WriterMethod.java

@@ -5,7 +5,15 @@ import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 
-// TODO 添加 Javadoc
+/**
+ * WriterMethod
+ *
+ * <p>
+ * 标识方法是写方法，如 setter。
+ *
+ * @author <a href="http://zhouxy.xyz:3000/ZhouXY108">ZhouXY</a>
+ * @since 1.0
+ */
 @Target(ElementType.METHOD)
 @Retention(RetentionPolicy.RUNTIME)
 public @interface WriterMethod {

src/main/java/xyz/zhouxy/plusone/commons/collection/SafeConcurrentHashMap.java

@@ -22,9 +22,21 @@ import java.util.function.Function;
 
 import javax.annotation.concurrent.ThreadSafe;
 
+import xyz.zhouxy.plusone.commons.base.JRE;
 import xyz.zhouxy.plusone.commons.util.ConcurrentHashMapUtil;
 
-// TODO 添加文档注释
+/**
+ * SafeConcurrentHashMap
+ *
+ * <p>
+ * Java 8 的 {@link ConcurrentHashMap#computeIfAbsent(Object, Function)} 方法有 bug，
+ * 使用 Java 8 时，可使用这个类进行替换。
+ * 
+ * @author <a href="http://zhouxy.xyz:3000/ZhouXY108">ZhouXY</a>
+ * @since 1.0
+ * @see ConcurrentHashMap
+ * @see ConcurrentHashMapUtil#computeIfAbsentForJava8(ConcurrentHashMap, Object, Function)
+ */
 @ThreadSafe
 public class SafeConcurrentHashMap<K, V> extends ConcurrentHashMap<K, V> {
 
@@ -102,6 +114,8 @@ public class SafeConcurrentHashMap<K, V> extends ConcurrentHashMap<K, V> {
     /** {@inheritDoc} */
     @Override
     public V computeIfAbsent(K key, Function<? super K, ? extends V> mappingFunction) {
-        return ConcurrentHashMapUtil.computeIfAbsentForJava8(this, key, mappingFunction);
+        return JRE.isJava8()
+                ? ConcurrentHashMapUtil.computeIfAbsentForJava8(this, key, mappingFunction)
+                : super.computeIfAbsent(key, mappingFunction);
     }
 }

src/main/java/xyz/zhouxy/plusone/commons/exception/BaseException.java

@@ -27,7 +27,7 @@ import java.util.Objects;
  * @author <a href="https://gitee.com/zhouxy108">ZhouXY</a>
  */
 public abstract class BaseException
-        extends RuntimeException
+        extends Exception
         implements IWithCode<String> {
 
     private static final long serialVersionUID = -2546365325001947203L;

src/main/java/xyz/zhouxy/plusone/commons/exception/BaseRuntimeException.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright 2022-2023 the original author or authors.
+ *
+ * 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
+ *
+ *      https://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 xyz.zhouxy.plusone.commons.exception;
+
+import xyz.zhouxy.plusone.commons.base.IWithCode;
+
+import javax.annotation.Nonnull;
+import java.util.Objects;
+
+/**
+ * 带错误码的异常。
+ *
+ * @author <a href="https://gitee.com/zhouxy108">ZhouXY</a>
+ */
+public abstract class BaseRuntimeException
+        extends RuntimeException
+        implements IWithCode<String> {
+
+    private static final long serialVersionUID = -6345888403567792664L;
+
+    @Nonnull
+    private final String code;
+
+    protected BaseRuntimeException(String code, String msg) {
+        super(msg);
+        this.code = Objects.requireNonNull(code);
+    }
+
+    protected BaseRuntimeException(String code, Throwable cause) {
+        super(cause);
+        this.code = Objects.requireNonNull(code);
+    }
+
+    protected BaseRuntimeException(String code, String msg, Throwable cause) {
+        super(msg, cause);
+        this.code = Objects.requireNonNull(code);
+    }
+
+    @Nonnull
+    @Override
+    public final String getCode() {
+        return this.code;
+    }
+}

src/main/java/xyz/zhouxy/plusone/commons/security/Hashers.java

@@ -0,0 +1,60 @@
+package xyz.zhouxy.plusone.commons.security;
+
+import com.google.common.hash.Hasher;
+import com.google.common.hash.Hashing;
+
+/**
+ * <p>
+ * 使用摘要算法推荐使用 guava 的 hash 包。
+ * </p>
+ * <p>
+ * 密码加密推荐使用 {@link org.mindrot.jbcrypt.BCrypt}。
+ * </p>
+ */
+public class Hashers {
+
+    /**
+     * 返回 guava 的 {@link Hasher}
+     */
+    public static Hasher sha256() {
+        return Hashing.sha256().newHasher();
+    }
+
+    /**
+     * 返回 guava 的 {@link Hasher}
+     */
+    public static Hasher sha384() {
+        return Hashing.sha384().newHasher();
+    }
+
+    /**
+     * 返回 guava 的 {@link Hasher}
+     */
+    public static Hasher sha512() {
+        return Hashing.sha512().newHasher();
+    }
+
+    /**
+     * 返回 guava 的 {@link Hasher}
+     * 
+     * @deprecated 该算法已弃用
+     */
+    @Deprecated
+    public static Hasher sha1() {
+        return Hashing.sha1().newHasher();
+    }
+
+    /**
+     * 返回 guava 的 {@link Hasher}
+     * 
+     * @deprecated 该算法已弃用
+     */
+    @Deprecated
+    public static Hasher md5() {
+        return Hashing.md5().newHasher();
+    }
+
+    private Hashers() {
+        throw new IllegalStateException("Utility class");
+    }
+}

src/main/java/xyz/zhouxy/plusone/commons/security/RSA.java

@@ -0,0 +1,93 @@
+package xyz.zhouxy.plusone.commons.security;
+
+import java.math.BigInteger;
+import java.nio.charset.StandardCharsets;
+import java.security.GeneralSecurityException;
+import java.security.KeyPair;
+import java.security.KeyPairGenerator;
+import java.security.NoSuchAlgorithmException;
+import java.security.PrivateKey;
+import java.security.PublicKey;
+
+import javax.crypto.Cipher;
+
+import com.google.common.annotations.Beta;
+
+/**
+ * RSA 非对称加密。
+ */
+@Beta
+public class RSA {
+    private static final int DEFAULT_KEY_SIZE = 2048;
+    public static final String NAME = "RSA";
+    private static final String TRANSFORMATION = "RSA/ECB/OAEPWithSHA-256AndMGF1Padding";
+
+    private final PublicKey publicKey;
+    private final PrivateKey privateKey;
+
+    private RSA(final PublicKey publicKey, final PrivateKey privateKey) {
+        this.publicKey = publicKey;
+        this.privateKey = privateKey;
+    }
+
+    public static RSA of(final PublicKey publicKey, final PrivateKey privateKey) {
+        return new RSA(publicKey, privateKey);
+
+    }
+
+    public static RSA of(final KeyPair keyPair) {
+        return new RSA(keyPair.getPublic(), keyPair.getPrivate());
+
+    }
+
+    public static RSA withKeySize(int keySize) {
+        try {
+            KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance(NAME);
+            keyPairGenerator.initialize(keySize);
+            final KeyPair keyPair = keyPairGenerator.generateKeyPair();
+            return new RSA(keyPair.getPublic(), keyPair.getPrivate());
+        } catch (NoSuchAlgorithmException e) {
+            throw new SecurityException(e);
+        }
+    }
+
+    public static RSA withDefaultKeySize() {
+        return withKeySize(DEFAULT_KEY_SIZE);
+    }
+
+    public PrivateKey getPrivateKey() {
+        return privateKey;
+    }
+
+    public PublicKey getPublicKey() {
+        return publicKey;
+    }
+
+    public byte[] encrypt(byte[] input) throws GeneralSecurityException {
+        Cipher encryptModeCipher = Cipher.getInstance(TRANSFORMATION);
+        encryptModeCipher.init(Cipher.ENCRYPT_MODE, publicKey);
+        return encryptModeCipher.doFinal(input);
+    }
+
+    public byte[] encrypt(String input) throws GeneralSecurityException {
+        return encrypt(input.getBytes(StandardCharsets.UTF_8));
+    }
+
+    public String encryptToString(String input) throws GeneralSecurityException {
+        return new BigInteger(1, encrypt(input)).toString(16);
+    }
+
+    public byte[] decrypt(byte[] input) throws GeneralSecurityException {
+        Cipher decryptModeCipher = Cipher.getInstance(TRANSFORMATION);
+        decryptModeCipher.init(Cipher.DECRYPT_MODE, privateKey);
+        return decryptModeCipher.doFinal(input);
+    }
+
+    public byte[] decrypt(String input) throws GeneralSecurityException {
+        return decrypt(new BigInteger(input, 16).toByteArray());
+    }
+
+    public String decryptToString(String input) throws GeneralSecurityException {
+        return new String(decrypt(input));
+    }
+}

src/main/java/xyz/zhouxy/plusone/commons/util/ConcurrentHashMapUtil.java

@@ -21,12 +21,28 @@ import java.util.concurrent.ConcurrentHashMap;
 import java.util.function.Function;
 
 import xyz.zhouxy.plusone.commons.base.JRE;
+import xyz.zhouxy.plusone.commons.collection.SafeConcurrentHashMap;
 
-public class ConcurrentHashMapUtil { // TODO 添加文档注释
+/**
+ * ConcurrentHashMapUtil
+ *
+ * <p>
+ * Java 8 的 {@link ConcurrentHashMap#computeIfAbsent(Object, Function)} 方法有 bug，
+ * 可使用这个工具类的 {@link computeIfAbsentForJava8} 进行替换。
+ *
+ * <p>
+ * <b>NOTE: 方法来自Dubbo，见：issues#2349</b>
+ * 
+ * @author <a href="http://zhouxy.xyz:3000/ZhouXY108">ZhouXY</a>
+ * @since 1.0
+ * @see ConcurrentHashMap
+ * @see SafeConcurrentHashMap
+ */
+public class ConcurrentHashMapUtil {
 
     public static <K, V> V computeIfAbsent(ConcurrentHashMap<K, V> map, final K key,
             final Function<? super K, ? extends V> mappingFunction) {
-
+        Objects.requireNonNull(map, "map");
         return JRE.isJava8()
                 ? computeIfAbsentForJava8(map, key, mappingFunction)
                 : map.computeIfAbsent(key, mappingFunction);
@@ -34,6 +50,7 @@ public class ConcurrentHashMapUtil { // TODO 添加文档注释
 
     public static <K, V> V computeIfAbsentForJava8(ConcurrentHashMap<K, V> map, final K key,
             final Function<? super K, ? extends V> mappingFunction) {
+        Objects.requireNonNull(key);
         Objects.requireNonNull(mappingFunction);
         V v = map.get(key);
         if (null == v) {

src/test/java/xyz/zhouxy/plusone/commons/SerialTests.java

@@ -0,0 +1,23 @@
+package xyz.zhouxy.plusone.commons;
+
+import java.io.ObjectStreamClass;
+
+import org.junit.jupiter.api.Test;
+
+import lombok.extern.slf4j.Slf4j;
+import xyz.zhouxy.plusone.commons.exception.BaseRuntimeException;
+
+@Slf4j
+class SerialTests {
+
+    @Test
+    void testSerialVersionUID() {
+        long uid = getSerialVersionUID(BaseRuntimeException.class);
+        log.info("\n    private static final long serialVersionUID = {}L;", uid);
+    }
+
+    private long getSerialVersionUID(Class<?> cl) {
+        ObjectStreamClass c = ObjectStreamClass.lookup(cl);
+        return c.getSerialVersionUID();
+    }
+}