1、升级版本1.5.1-SNAPSHOT版本；

README.md

 - 7、表结构调整,底层重构优化;
 - 8、"调度中心"自动注册和发现,failover: 调度中心周期性自动注册, 任务回调时可以感知在线的所有调度中心地址, 通过failover的方式进行任务回调,避免回调单点风险。
 
+#### 6.10 版本 V1.5.1 特性
+- 1、代码优化，POM清理；
+- 2、Spring升级至3.2.17.RELEASE版本；
+- 3、Jetty升级新版本；
+- 4、集群执行器选择规则自定义：单点=选择第一个，随机=随机选择一个；
+
 #### 规划中
-- 1、集群执行器选择规则自定义：选择第一个，或者随机等；
-- 2、升级jetty，spring等版本；
 - 3、任务执行规则自定义：假如前一个任务正在执行，后续调度执行规则支持自定义；
     串行（默认，当前逻辑）：后续调度入调度队列；
     并行：后续调度并行执行；

pom.xml

 	<modelVersion>4.0.0</modelVersion>
 	<groupId>com.xuxueli</groupId>
 	<artifactId>xxl-job</artifactId>
-	<version>1.5.0</version>
+	<version>1.5.1-SNAPSHOT</version>
 	<packaging>pom</packaging>
 
 	<name>xxl-job</name>

xxl-job-admin/pom.xml

 	<parent>
 		<groupId>com.xuxueli</groupId>
 		<artifactId>xxl-job</artifactId>
-		<version>1.5.0</version>
+		<version>1.5.1-SNAPSHOT</version>
 	</parent>
 	<artifactId>xxl-job-admin</artifactId>
 	<packaging>war</packaging>
 
 	<properties>
-		<xxl-job.version>1.5.0</xxl-job.version>
-		<spring.version>3.2.14.RELEASE</spring.version>
+		<xxl-job.version>1.5.1-SNAPSHOT</xxl-job.version>
+		<spring.version>3.2.17.RELEASE</spring.version>
 	</properties>
 
 	<dependencies>
 			<groupId>javax.servlet</groupId>
 			<artifactId>servlet-api</artifactId>
 			<version>2.5</version>
-			<scope>provided</scope>
+			<!--<scope>provided</scope>-->
 		</dependency>
 		<dependency>
 			<groupId>javax.servlet.jsp</groupId>
 			<artifactId>jsp-api</artifactId>
 			<version>2.1</version>
-			<scope>provided</scope>
 		</dependency>
 
 		<!-- junit -->

xxl-job-admin/src/main/java/com/xxl/job/admin/dao/impl/XxlJobRegistryDaoImpl.java

 
     @Override
     public int registryUpdate(String registryGroup, String registryKey, String registryValue) {
-        Map<String, Object> params = new HashMap();
+        Map<String, Object> params = new HashMap<String, Object>();
         params.put("registryGroup", registryGroup);
         params.put("registryKey", registryKey);
         params.put("registryValue", registryValue);
 
     @Override
     public int registrySave(String registryGroup, String registryKey, String registryValue) {
-        Map<String, Object> params = new HashMap();
+        Map<String, Object> params = new HashMap<String, Object>();
         params.put("registryGroup", registryGroup);
         params.put("registryKey", registryKey);
         params.put("registryValue", registryValue);

xxl-job-core/pom.xml

 	<parent>
 		<groupId>com.xuxueli</groupId>
 		<artifactId>xxl-job</artifactId>
-		<version>1.5.0</version>
+		<version>1.5.1-SNAPSHOT</version>
 	</parent>
 	<artifactId>xxl-job-core</artifactId>
 	<packaging>jar</packaging>
 
 	<properties>
-		<spring.version>3.2.14.RELEASE</spring.version>
+		<spring.version>3.2.17.RELEASE</spring.version>
 	</properties>
 
 	<dependencies>
 			<groupId>javax.servlet</groupId>
 			<artifactId>servlet-api</artifactId>
 			<version>2.5</version>
-			<scope>provided</scope>
 		</dependency>
 		<dependency>
 			<groupId>javax.servlet.jsp</groupId>
 			<artifactId>jsp-api</artifactId>
 			<version>2.1</version>
-			<scope>provided</scope>
 		</dependency>
 
 		<!-- jetty -->
 			<groupId>org.springframework</groupId>
 			<artifactId>spring-context</artifactId>
 			<version>${spring.version}</version>
-			<scope>compile</scope>
 		</dependency>
 		
 		<!-- groovy-all -->

xxl-job-core/src/main/java/com/xxl/job/core/util/DBUtil.java

 
     private static List<Map<String, Object>> resultSetToList(ResultSet resultSet) throws SQLException {
         if (resultSet == null) {
-            return Collections.EMPTY_LIST;
+            return new ArrayList<Map<String, Object>>();
         }
 
         ResultSetMetaData resultSetMetaData = resultSet.getMetaData(); // 得到结果集(rs)的结构信息，比如字段数、字段名等

xxl-job-executor-example/pom.xml

 	<parent>
 		<groupId>com.xuxueli</groupId>
 		<artifactId>xxl-job</artifactId>
-		<version>1.5.0</version>
+		<version>1.5.1-SNAPSHOT</version>
 	</parent>
 	<artifactId>xxl-job-executor-example</artifactId>
 	<packaging>war</packaging>
 
 	<properties>
-		<xxl-job.version>1.5.0</xxl-job.version>
-		<spring.version>3.2.14.RELEASE</spring.version>
+		<xxl-job.version>1.5.1-SNAPSHOT</xxl-job.version>
+		<spring.version>3.2.17.RELEASE</spring.version>
 	</properties>
 
 	<dependencies>