diff --git a/README.md b/README.md
index 6cc2e53..60969b9 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 
 使用方法：
 
-+ 在项目中放置jar包的地方把seq-1.6.2.jar、seq-1.6.2-sources.jar、seq-1.6.2-pom.xml复制过去
++ 在项目中放置jar包的地方把seq-1.7.2.jar、seq-1.7.2-sources.jar、seq-1.7.2-pom.xml复制过去
 + 在pom.xml中增加以下内容，然后执行maven命令：mvn clean
 
 ```xml
@@ -18,7 +18,7 @@
         <dependency>
             <groupId>com.yanghuanglin</groupId>
             <artifactId>seq</artifactId>
-            <version>1.6.2</version>
+            <version>1.7.2</version>
             <exclusions>
                 <!-- 如若你项目中有引用spring-jdbc，则需要排除seq的jdbc依赖 -->
                 <exclusion>
@@ -50,13 +50,13 @@
                         </goals>
                         <configuration>
                             <!-- ${project.basedir}表示当前项目的根目录 -->
-                            <file>${project.basedir}/lib/seq-1.6.2.jar</file>
-                            <pomFile>${project.basedir}/lib/seq-1.6.2-pom.xml</pomFile>
-                            <sources>${project.basedir}/lib/seq-1.6.2-sources.jar</sources>
+                            <file>${project.basedir}/lib/seq-1.7.2.jar</file>
+                            <pomFile>${project.basedir}/lib/seq-1.7.2-pom.xml</pomFile>
+                            <sources>${project.basedir}/lib/seq-1.7.2-sources.jar</sources>
                             <repositoryLayout>default</repositoryLayout>
                             <groupId>com.yanghuanglin</groupId>
                             <artifactId>seq</artifactId>
-                            <version>1.6.2</version>
+                            <version>1.7.2</version>
                             <packaging>jar</packaging>
                             <generatePom>true</generatePom>
                         </configuration>
@@ -461,6 +461,17 @@ public interface Generator {
      */
     boolean lock(Sequences sequences);
 
+    /**
+     * 忽略{@link Sequences#getSeq()} ，仅通过{@link Sequences#getKey()}和{@link Sequences#getType()}来锁定序号。
+     * <p/>
+     * 如果ignoreSeq为false，则等价于{@link #lock(Sequences)}
+     *
+     * @param sequences 需要锁定的序号
+     * @param ignoreSeq 是否忽略序号
+     * @return 锁定结果
+     */
+    boolean lock(Sequences sequences, boolean ignoreSeq);
+
     /**
      * 释放所有未使用的序号
      * <p/>
@@ -499,6 +510,16 @@ public interface Generator {
      */
     void release(Sequences sequences);
 
+    /**
+     * 忽略{@link Sequences#getSeq()}来释放指定序号。一般用于业务对象删除后，对应序号需要回收使用时。
+     * <p/>
+     * 如果ignoreSeq为false，则等价于{@link #release(Sequences)}
+     *
+     * @param sequences 需要释放的序号。一般是一个通过{@link Sequences#setKey(String)}、{@link Sequences#setType(String)}、{@link Sequences#setSeq(Long)}三方法一起手动构建或通过{@link Sequences#Sequences(String, String, Long)}构造方法构建的实例对象
+     * @param ignoreSeq 是否忽略序号
+     */
+    void release(Sequences sequences, boolean ignoreSeq);
+
     /**
      * 清空所有闲置序号和未锁定序号
      */
@@ -524,4 +545,5 @@ public interface Generator {
     void clearBefore(Date end);
 }
 
+
 ```
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index 48eef53..bfcbc10 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.yanghuanglin</groupId>
     <artifactId>seq</artifactId>
-    <version>1.6.2</version>
+    <version>1.7.2</version>
     <name>seq</name>
     <description>seq</description>
     <properties>
diff --git a/src/main/java/com/yanghuanglin/seq/dao/impl/SequencesUnlockDaoImpl.java b/src/main/java/com/yanghuanglin/seq/dao/impl/SequencesUnlockDaoImpl.java
index c10a932..b49a280 100644
--- a/src/main/java/com/yanghuanglin/seq/dao/impl/SequencesUnlockDaoImpl.java
+++ b/src/main/java/com/yanghuanglin/seq/dao/impl/SequencesUnlockDaoImpl.java
@@ -33,10 +33,15 @@ public class SequencesUnlockDaoImpl implements SequencesUnlockDao {
 
     @Override
     public boolean delete(SequencesUnlock sequencesUnlock) {
-        String sql = "delete from `%s_unlock` where `%s`=? and `%s`=? and `%s`=?";
-        sql = String.format(sql, tableConfig.getTable(), tableConfig.getKeyColumn(), tableConfig.getTypeColumn(), tableConfig.getSeqColumn());
-        int result = this.jdbcTemplate.update(sql, sequencesUnlock.getKey(), sequencesUnlock.getType(), sequencesUnlock.getSeq());
-        return result != 0;
+        String sql = "delete from `%s_unlock` where `%s`=? and `%s`=?";
+        sql = String.format(sql, tableConfig.getTable(), tableConfig.getKeyColumn(), tableConfig.getTypeColumn());
+        if (sequencesUnlock.getSeq() != null) {
+            sql += " and `%s`=?";
+            sql = String.format(sql, tableConfig.getSeqColumn());
+            return this.jdbcTemplate.update(sql, sequencesUnlock.getKey(), sequencesUnlock.getType(), sequencesUnlock.getSeq()) != 0;
+        } else {
+            return this.jdbcTemplate.update(sql, sequencesUnlock.getKey(), sequencesUnlock.getType()) != 0;
+        }
     }
 
     @Override
diff --git a/src/main/java/com/yanghuanglin/seq/generator/Generator.java b/src/main/java/com/yanghuanglin/seq/generator/Generator.java
index fd1c2a7..6c316d5 100644
--- a/src/main/java/com/yanghuanglin/seq/generator/Generator.java
+++ b/src/main/java/com/yanghuanglin/seq/generator/Generator.java
@@ -167,6 +167,17 @@ public interface Generator {
      */
     boolean lock(Sequences sequences);
 
+    /**
+     * 忽略{@link Sequences#getSeq()} ，仅通过{@link Sequences#getKey()}和{@link Sequences#getType()}来锁定序号。
+     * <p/>
+     * 如果ignoreSeq为false，则等价于{@link #lock(Sequences)}
+     *
+     * @param sequences 需要锁定的序号
+     * @param ignoreSeq 是否忽略序号
+     * @return 锁定结果
+     */
+    boolean lock(Sequences sequences, boolean ignoreSeq);
+
     /**
      * 释放所有未使用的序号
      * <p/>
@@ -205,6 +216,16 @@ public interface Generator {
      */
     void release(Sequences sequences);
 
+    /**
+     * 忽略{@link Sequences#getSeq()}来释放指定序号。一般用于业务对象删除后，对应序号需要回收使用时。
+     * <p/>
+     * 如果ignoreSeq为false，则等价于{@link #release(Sequences)}
+     *
+     * @param sequences 需要释放的序号。一般是一个通过{@link Sequences#setKey(String)}、{@link Sequences#setType(String)}、{@link Sequences#setSeq(Long)}三方法一起手动构建或通过{@link Sequences#Sequences(String, String, Long)}构造方法构建的实例对象
+     * @param ignoreSeq 是否忽略序号
+     */
+    void release(Sequences sequences, boolean ignoreSeq);
+
     /**
      * 清空所有闲置序号和未锁定序号
      */
diff --git a/src/main/java/com/yanghuanglin/seq/generator/impl/SequencesGenerator.java b/src/main/java/com/yanghuanglin/seq/generator/impl/SequencesGenerator.java
index 1031d10..9baa618 100644
--- a/src/main/java/com/yanghuanglin/seq/generator/impl/SequencesGenerator.java
+++ b/src/main/java/com/yanghuanglin/seq/generator/impl/SequencesGenerator.java
@@ -111,7 +111,7 @@ public class SequencesGenerator implements Generator {
 
     @Override
     public synchronized String generate(String key, String type, Integer minLength) {
-        Sequences sequences = this.generate(key, type);
+        Sequences sequences = generate(key, type);
         if (sequences == null)
             return null;
         return sequences.format(minLength);
@@ -242,6 +242,18 @@ public class SequencesGenerator implements Generator {
         return sequencesUnlockDao.delete(condition);
     }
 
+    @Override
+    public synchronized boolean lock(Sequences sequences, boolean ignoreSeq) {
+        if (!ignoreSeq)
+            return lock(sequences);
+        if (sequences == null)
+            return true;
+        SequencesUnlock condition = new SequencesUnlock(sequences);
+        condition.setSeq(null);
+        //将使用中表的对应数据删除，空闲表中数据在生成时会删除，因此这里不需要处理该表
+        return sequencesUnlockDao.delete(condition);
+    }
+
     @Override
     public synchronized void release() {
         //列出所有使用中表存在的序号
@@ -292,6 +304,20 @@ public class SequencesGenerator implements Generator {
         sequencesUnusedDao.save(new SequencesUnused(sequences, new Date()));
     }
 
+    @Override
+    public synchronized void release(Sequences sequences, boolean ignoreSeq) {
+        if (!ignoreSeq) {
+            release(sequences);
+            return;
+        }
+        if (sequences == null)
+            return;
+        SequencesUnlock sequencesUnlock = new SequencesUnlock(sequences);
+        sequencesUnlock.setSeq(null);
+        sequencesUnlockDao.delete(sequencesUnlock);
+        //由于忽略了序号，因此不需要将未使用序号放到SequencesUnused里面
+    }
+
     @Override
     public synchronized void clear() {
         sequencesUnlockDao.deleteAll();