高并发时selectKey会产生异常，解决abel533#32

abel533 · abel533 · commit 8515a74ba8c9 · 2015-06-01T09:32:37.000+08:00
diff --git a/src/main/java/com/github/abel533/mapperhelper/MapperTemplate.java b/src/main/java/com/github/abel533/mapperhelper/MapperTemplate.java
@@ -427,11 +427,18 @@ protected void newSelectKeyMappedStatement(MappedStatement ms, EntityHelper.Enti
             statementBuilder.cache(null);
 
             MappedStatement statement = statementBuilder.build();
-            configuration.addMappedStatement(statement);
-
+            try {
+                configuration.addMappedStatement(statement);
+            } catch (Exception e) {
+                //ignore
+            }
             MappedStatement keyStatement = configuration.getMappedStatement(keyId, false);
             keyGenerator = new SelectKeyGenerator(keyStatement, executeBefore);
-            configuration.addKeyGenerator(keyId, keyGenerator);
+            try {
+                configuration.addKeyGenerator(keyId, keyGenerator);
+            } catch (Exception e) {
+                //ignore
+            }
         }
         //keyGenerator
         try {
