[Optimization-382][alert,metadata] Optimization SPI

dlink-alert/dlink-alert-base/src/main/java/com/dlink/alert/Alert.java

 package com.dlink.alert;
 
-import com.dlink.assertion.Asserts;
-
-import sun.misc.Service;
-
-import java.util.Iterator;
 import java.util.Optional;
+import java.util.ServiceLoader;
+
+import com.dlink.assertion.Asserts;
 
 /**
  * Alert
@@ -17,9 +15,8 @@ public interface Alert {
 
     static Optional<Alert> get(AlertConfig config) {
         Asserts.checkNotNull(config, "报警组件配置不能为空");
-        Iterator<Alert> providers = Service.providers(Alert.class);
-        while (providers.hasNext()) {
-            Alert alert = providers.next();
+        ServiceLoader<Alert> alerts = ServiceLoader.load(Alert.class);
+        for (Alert alert : alerts) {
             if (alert.canHandle(config.getType())) {
                 return Optional.of(alert.setConfig(config));
             }

dlink-metadata/dlink-metadata-base/src/main/java/com/dlink/metadata/driver/Driver.java

 package com.dlink.metadata.driver;
 
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.ServiceLoader;
+
 import com.dlink.assertion.Asserts;
 import com.dlink.exception.MetaDataException;
 import com.dlink.metadata.result.JdbcSelectResult;
@@ -7,12 +12,6 @@ import com.dlink.model.Column;
 import com.dlink.model.Schema;
 import com.dlink.model.Table;
 import com.dlink.result.SqlExplainResult;
-import sun.misc.Service;
-
-import java.util.Iterator;
-import java.util.List;
-import java.util.Map;
-import java.util.Optional;
 
 /**
  * Driver
@@ -24,11 +23,10 @@ public interface Driver {
 
     static Optional<Driver> get(DriverConfig config) {
         Asserts.checkNotNull(config, "数据源配置不能为空");
-        Iterator<Driver> providers = Service.providers(Driver.class);
-        while (providers.hasNext()) {
-            Driver gainer = providers.next();
-            if (gainer.canHandle(config.getType())) {
-                return Optional.of(gainer.setDriverConfig(config));
+        ServiceLoader<Driver> drivers = ServiceLoader.load(Driver.class);
+        for (Driver driver : drivers) {
+            if (driver.canHandle(config.getType())) {
+                return Optional.of(driver.setDriverConfig(config));
             }
         }
         return Optional.empty();