diff --git a/src/main/java/space/caoshd/otone/builder/ColumnBuilder.java b/src/main/java/space/caoshd/otone/builder/ColumnBuilder.java
index 097781b..3eaa401 100644
--- a/src/main/java/space/caoshd/otone/builder/ColumnBuilder.java
+++ b/src/main/java/space/caoshd/otone/builder/ColumnBuilder.java
@@ -3,7 +3,7 @@ package space.caoshd.otone.builder;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import space.caoshd.otone.entity.ColumnInfo;
-import space.caoshd.otone.tool.PropTools;
+import space.caoshd.otone.helper.PropHelper;
 import space.caoshd.otone.util.DBUtils;
 import space.caoshd.otone.util.JsonUtils;
 import space.caoshd.otone.util.PathConsts;
@@ -20,7 +20,7 @@ public class ColumnBuilder {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(ColumnBuilder.class);
 
-    private static final PropTools CONFIG = new PropTools(PathConsts.MYSQL_PROPERTIES_PATH);
+    private static final PropHelper CONFIG = new PropHelper(PathConsts.MYSQL_PROPERTIES_PATH);
 
     private final String schemaName;
     private final String tableName;
diff --git a/src/main/java/space/caoshd/otone/builder/IndexBuilder.java b/src/main/java/space/caoshd/otone/builder/IndexBuilder.java
index 30ed0b4..6436ce0 100644
--- a/src/main/java/space/caoshd/otone/builder/IndexBuilder.java
+++ b/src/main/java/space/caoshd/otone/builder/IndexBuilder.java
@@ -3,7 +3,7 @@ package space.caoshd.otone.builder;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import space.caoshd.otone.entity.IndexInfo;
-import space.caoshd.otone.tool.PropTools;
+import space.caoshd.otone.helper.PropHelper;
 import space.caoshd.otone.util.DBUtils;
 import space.caoshd.otone.util.JsonUtils;
 import space.caoshd.otone.util.PathConsts;
@@ -18,8 +18,8 @@ public class IndexBuilder {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(IndexBuilder.class);
 
-    private static final PropTools CONFIG =
-        new PropTools(PathConsts.MYSQL_PROPERTIES_PATH);
+    private static final PropHelper CONFIG =
+        new PropHelper(PathConsts.MYSQL_PROPERTIES_PATH);
 
     public static List<IndexInfo> loadIndexInfo(String schemaName, String tableName) {
 
diff --git a/src/main/java/space/caoshd/otone/builder/InfoClsBuilder.java b/src/main/java/space/caoshd/otone/builder/InfoClsBuilder.java
index 728969b..7314b09 100644
--- a/src/main/java/space/caoshd/otone/builder/InfoClsBuilder.java
+++ b/src/main/java/space/caoshd/otone/builder/InfoClsBuilder.java
@@ -1,7 +1,7 @@
 package space.caoshd.otone.builder;
 
 import space.caoshd.otone.entity.ClassInfo;
-import space.caoshd.otone.tool.PropTools;
+import space.caoshd.otone.helper.PropHelper;
 import space.caoshd.otone.util.CfgUtils;
 import space.caoshd.otone.util.PathConsts;
 import space.caoshd.otone.util.StrUtils;
@@ -10,12 +10,12 @@ import java.util.List;
 
 public class InfoClsBuilder {
 
-    private static final PropTools CONFIG = new PropTools(PathConsts.CONFIG_PROPERTIES_PATH);
+    private static final PropHelper CONFIG = new PropHelper(PathConsts.CONFIG_PROPERTIES_PATH);
 
     private final ClassInfo classInfo = new ClassInfo();
 
     private String getTableNameWithoutPrefix(String tableNameWithoutPrefix) {
-        List<String> tablePrefixes = CONFIG.getStrings(CfgUtils.DATABASE_TABLE_PREFIXES);
+        List<String> tablePrefixes = CONFIG.getStringList(CfgUtils.DATABASE_TABLE_PREFIXES);
         for (String tablePrefix : tablePrefixes) {
             tableNameWithoutPrefix = StrUtils.removePrefix(tableNameWithoutPrefix, tablePrefix);
         }
diff --git a/src/main/java/space/caoshd/otone/builder/SourceBuilder.java b/src/main/java/space/caoshd/otone/builder/SourceBuilder.java
index 5bc532c..e63577d 100644
--- a/src/main/java/space/caoshd/otone/builder/SourceBuilder.java
+++ b/src/main/java/space/caoshd/otone/builder/SourceBuilder.java
@@ -6,7 +6,7 @@ import space.caoshd.otone.entity.ClassInfo;
 import space.caoshd.otone.entity.ContextInfo;
 import space.caoshd.otone.entity.OutputInfo;
 import space.caoshd.otone.entity.TableInfo;
-import space.caoshd.otone.tool.PropTools;
+import space.caoshd.otone.helper.PropHelper;
 import space.caoshd.otone.util.CfgUtils;
 import space.caoshd.otone.util.FileUtils;
 import space.caoshd.otone.util.PathConsts;
@@ -22,7 +22,7 @@ public class SourceBuilder {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(SourceBuilder.class);
 
-    private static final PropTools CONFIG = new PropTools(PathConsts.CONFIG_PROPERTIES_PATH);
+    private static final PropHelper CONFIG = new PropHelper(PathConsts.CONFIG_PROPERTIES_PATH);
     private final Map<String, Object> extra = new HashMap<>();
     private TableInfo tableInfo;
     private OutputInfo outputInfo;
diff --git a/src/main/java/space/caoshd/otone/builder/TableBuilder.java b/src/main/java/space/caoshd/otone/builder/TableBuilder.java
index d651f58..607c92c 100644
--- a/src/main/java/space/caoshd/otone/builder/TableBuilder.java
+++ b/src/main/java/space/caoshd/otone/builder/TableBuilder.java
@@ -5,7 +5,7 @@ import org.slf4j.LoggerFactory;
 import space.caoshd.otone.entity.ColumnInfo;
 import space.caoshd.otone.entity.IndexInfo;
 import space.caoshd.otone.entity.TableInfo;
-import space.caoshd.otone.tool.PropTools;
+import space.caoshd.otone.helper.PropHelper;
 import space.caoshd.otone.util.CfgUtils;
 import space.caoshd.otone.util.DBUtils;
 import space.caoshd.otone.util.JsonUtils;
@@ -25,13 +25,13 @@ public class TableBuilder {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(TableBuilder.class);
 
-    private static final PropTools MYSQL_CONFIG = new PropTools(PathConsts.MYSQL_PROPERTIES_PATH);
+    private static final PropHelper MYSQL_CONFIG = new PropHelper(PathConsts.MYSQL_PROPERTIES_PATH);
 
-    private static final PropTools CONFIG = new PropTools(PathConsts.CONFIG_PROPERTIES_PATH);
+    private static final PropHelper CONFIG = new PropHelper(PathConsts.CONFIG_PROPERTIES_PATH);
 
     public List<TableInfo> build() {
         List<TableInfo> result = new ArrayList<>();
-        List<String> schemaNames = CONFIG.getStrings(CfgUtils.DATABASE_NAME_SCHEMAS);
+        List<String> schemaNames = CONFIG.getStringList(CfgUtils.DATABASE_NAME_SCHEMAS);
         if (schemaNames.isEmpty()) {
             String sql = MYSQL_CONFIG.getString(SqlConsts.TABLE_SQL);
             List<Map<String, String>> tables = DBUtils.list(sql);
@@ -49,7 +49,7 @@ public class TableBuilder {
 
     public List<TableInfo> build(String schemaName) {
         List<TableInfo> result = new ArrayList<>();
-        List<String> tableNames = CONFIG.getStrings(CfgUtils.DATABASE_NAME_TABLES);
+        List<String> tableNames = CONFIG.getStringList(CfgUtils.DATABASE_NAME_TABLES);
         if (tableNames.isEmpty()) {
             String sql = MYSQL_CONFIG.getString(SqlConsts.TABLE_SQL_SCHEMA);
             List<String> params = Collections.singletonList(schemaName);
diff --git a/src/main/java/space/caoshd/otone/tool/PropTools.java b/src/main/java/space/caoshd/otone/helper/PropHelper.java
similarity index 65%
rename from src/main/java/space/caoshd/otone/tool/PropTools.java
rename to src/main/java/space/caoshd/otone/helper/PropHelper.java
index f1588a5..114b5db 100644
--- a/src/main/java/space/caoshd/otone/tool/PropTools.java
+++ b/src/main/java/space/caoshd/otone/helper/PropHelper.java
@@ -1,4 +1,4 @@
-package space.caoshd.otone.tool;
+package space.caoshd.otone.helper;
 
 import space.caoshd.otone.util.ResUtils;
 
@@ -12,18 +12,18 @@ import java.util.Objects;
 import java.util.Optional;
 import java.util.Properties;
 
-public class PropTools {
+public class PropHelper {
 
     private Map<String, String> propertyMap;
 
     private Properties properties;
 
-    public PropTools(InputStream stream) {
+    public PropHelper(InputStream stream) {
         loadProperties(stream);
         parseProperties();
     }
 
-    public PropTools(String filename) {
+    public PropHelper(String filename) {
         this(ResUtils.getClassPathFileStream(filename));
     }
 
@@ -51,34 +51,58 @@ public class PropTools {
         return Optional.ofNullable(propertyMap.get(key)).orElse(defaultValue);
     }
 
-    public Integer getInt(String key) {
+    public Integer getInt(String key, Integer defaultInt) {
+        String value = propertyMap.get(key);
+        if (value == null || value.trim().isEmpty()) {
+            return defaultInt;
+        }
         return Integer.valueOf(propertyMap.get(key));
     }
 
-    public Boolean getBoolean(String key) {
+    public Integer getInt(String key) {
+        return getInt(key, 0);
+    }
+
+    public Boolean getBoolean(String key, Boolean defaultBoolean) {
         String value = propertyMap.get(key);
-        if (value == null) {
-            return Boolean.FALSE;
+        if (value == null || value.trim().isEmpty()) {
+            return defaultBoolean;
         }
         return Boolean.valueOf(value);
     }
 
-    public Long getLong(String key) {
+    public Boolean getBoolean(String key) {
+        return getBoolean(key, false);
+    }
+
+    public Long getLong(String key, Long defaultLong) {
+        String value = propertyMap.get(key);
+        if (value == null || value.trim().isEmpty()) {
+            return defaultLong;
+        }
         return Long.valueOf(propertyMap.get(key));
     }
 
-    public List<String> getStrings(String key) {
-        List<String> result = new ArrayList<>();
+    public Long getLong(String key) {
+        return getLong(key, 0L);
+    }
+
+    public List<String> getStringList(String key, List<String> defaultStringList) {
         String values = propertyMap.get(key);
         if (Objects.isNull(values)) {
-            return result;
+            return defaultStringList;
         }
+        List<String> result = new ArrayList<>();
         for (String value : values.split(",")) {
             result.add(value.trim());
         }
         return result;
     }
 
+    public List<String> getStringList(String key) {
+        return getStringList(key, new ArrayList<>());
+    }
+
     public Map<String, String> getPropertyMap() {
         return propertyMap;
     }
diff --git a/src/main/java/space/caoshd/otone/util/CfgUtils.java b/src/main/java/space/caoshd/otone/util/CfgUtils.java
index 283c39c..b8f1620 100644
--- a/src/main/java/space/caoshd/otone/util/CfgUtils.java
+++ b/src/main/java/space/caoshd/otone/util/CfgUtils.java
@@ -1,6 +1,6 @@
 package space.caoshd.otone.util;
 
-import space.caoshd.otone.tool.PropTools;
+import space.caoshd.otone.helper.PropHelper;
 
 import java.nio.file.Paths;
 
@@ -102,7 +102,7 @@ public class CfgUtils {
         + ".interface.vm";
     public static final String DEFAULT_TEMPLATE_PATH_MAPPER = "template/mapper.vm";
     public static final String DEFAULT_TEMPLATE_PATH_MAPPER_XML = "template/mapper.xml.vm";
-    private static final PropTools CONFIG = new PropTools(PathConsts.CONFIG_PROPERTIES_PATH);
+    private static final PropHelper CONFIG = new PropHelper(PathConsts.CONFIG_PROPERTIES_PATH);
     private static final String JAVA_FILE_SUFFIX = ".java";
 
     // 私有化构造器
diff --git a/src/main/java/space/caoshd/otone/util/DBUtils.java b/src/main/java/space/caoshd/otone/util/DBUtils.java
index b97c99d..bb90173 100644
--- a/src/main/java/space/caoshd/otone/util/DBUtils.java
+++ b/src/main/java/space/caoshd/otone/util/DBUtils.java
@@ -1,6 +1,6 @@
 package space.caoshd.otone.util;
 
-import space.caoshd.otone.tool.PropTools;
+import space.caoshd.otone.helper.PropHelper;
 
 import java.io.InputStream;
 import java.sql.Connection;
@@ -21,11 +21,11 @@ public class DBUtils {
         try {
             InputStream datasourcePropertiesStream = ResUtils.getClassPathFileStream(
                 PathConsts.DATASOURCE_PROPERTIES_PATH);
-            PropTools propTools = new PropTools(datasourcePropertiesStream);
-            String username = propTools.getString("username");
-            String password = propTools.getString("password");
-            String driverClassName = propTools.getString("driver-class-name");
-            String url = propTools.getString("url");
+            PropHelper propHelper = new PropHelper(datasourcePropertiesStream);
+            String username = propHelper.getString("username");
+            String password = propHelper.getString("password");
+            String driverClassName = propHelper.getString("driver-class-name");
+            String url = propHelper.getString("url");
             Class.forName(driverClassName);
             return DriverManager.getConnection(url, username, password);
         } catch (Exception e) {
diff --git a/src/main/java/space/caoshd/otone/util/VelocityUtils.java b/src/main/java/space/caoshd/otone/util/VelocityUtils.java
index e6128c9..1623cc5 100644
--- a/src/main/java/space/caoshd/otone/util/VelocityUtils.java
+++ b/src/main/java/space/caoshd/otone/util/VelocityUtils.java
@@ -7,7 +7,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import space.caoshd.otone.builder.TableBuilder;
 import space.caoshd.otone.entity.ContextInfo;
-import space.caoshd.otone.tool.PropTools;
+import space.caoshd.otone.helper.PropHelper;
 
 import java.io.FileWriter;
 import java.io.IOException;
@@ -19,8 +19,8 @@ public class VelocityUtils {
     private static final Logger LOGGER = LoggerFactory.getLogger(TableBuilder.class);
 
     public static void render(String templatePath, String outputPath, ContextInfo ctx) {
-        PropTools propTools = new PropTools(PathConsts.VELOCITY_PROPERTIES_PATH);
-        Properties properties = propTools.getProperties();
+        PropHelper propHelper = new PropHelper(PathConsts.VELOCITY_PROPERTIES_PATH);
+        Properties properties = propHelper.getProperties();
         Velocity.init(properties);
 
         VelocityContext context = new VelocityContext();
diff --git a/src/test/java/space/caoshd/otone/builder/SourceBuilderTest.java b/src/test/java/space/caoshd/otone/builder/SourceBuilderTest.java
index d8ba754..e8453b4 100644
--- a/src/test/java/space/caoshd/otone/builder/SourceBuilderTest.java
+++ b/src/test/java/space/caoshd/otone/builder/SourceBuilderTest.java
@@ -1,12 +1,12 @@
 package space.caoshd.otone.builder;
 
 import org.junit.Test;
-import space.caoshd.otone.tool.PropTools;
+import space.caoshd.otone.helper.PropHelper;
 import space.caoshd.otone.util.PathConsts;
 
 public class SourceBuilderTest {
 
-    private static final PropTools CONFIG = new PropTools(PathConsts.MYSQL_PROPERTIES_PATH);
+    private static final PropHelper CONFIG = new PropHelper(PathConsts.MYSQL_PROPERTIES_PATH);
 
     @Test
     public void build() {
diff --git a/src/test/java/space/caoshd/otone/tool/PropToolsTest.java b/src/test/java/space/caoshd/otone/helper/PropHelperTest.java
similarity index 68%
rename from src/test/java/space/caoshd/otone/tool/PropToolsTest.java
rename to src/test/java/space/caoshd/otone/helper/PropHelperTest.java
index fd7d430..c2c718c 100644
--- a/src/test/java/space/caoshd/otone/tool/PropToolsTest.java
+++ b/src/test/java/space/caoshd/otone/helper/PropHelperTest.java
@@ -1,4 +1,4 @@
-package space.caoshd.otone.tool;
+package space.caoshd.otone.helper;
 
 import org.junit.Assert;
 import org.junit.Test;
@@ -9,14 +9,14 @@ import space.caoshd.otone.util.ResUtils;
 import java.io.InputStream;
 import java.util.List;
 
-public class PropToolsTest {
+public class PropHelperTest {
 
     @Test
     public void loadProperties() {
         InputStream fileStream =
             ResUtils.getClassPathFileStream(PathConsts.DATASOURCE_PROPERTIES_PATH);
-        PropTools propTools = new PropTools(fileStream);
-        Assert.assertNotNull(propTools);
+        PropHelper propHelper = new PropHelper(fileStream);
+        Assert.assertNotNull(propHelper);
     }
 
     @Test
@@ -26,8 +26,8 @@ public class PropToolsTest {
     @Test
     public void getStrings() {
         InputStream fileStream = ResUtils.getClassPathFileStream(PathConsts.CONFIG_PROPERTIES_PATH);
-        PropTools configProperties = new PropTools(fileStream);
-        List<String> strings = configProperties.getStrings(CfgUtils.DATABASE_TABLE_PREFIXES);
+        PropHelper configProperties = new PropHelper(fileStream);
+        List<String> strings = configProperties.getStringList(CfgUtils.DATABASE_TABLE_PREFIXES);
         System.out.println(strings);
     }
 
diff --git a/src/test/java/space/caoshd/otone/util/DBUtilsTest.java b/src/test/java/space/caoshd/otone/util/DBUtilsTest.java
index 9fb8a01..24925d7 100644
--- a/src/test/java/space/caoshd/otone/util/DBUtilsTest.java
+++ b/src/test/java/space/caoshd/otone/util/DBUtilsTest.java
@@ -2,7 +2,7 @@ package space.caoshd.otone.util;
 
 import org.junit.Assert;
 import org.junit.Test;
-import space.caoshd.otone.tool.PropTools;
+import space.caoshd.otone.helper.PropHelper;
 
 import java.util.Arrays;
 import java.util.List;
@@ -12,12 +12,12 @@ public class DBUtilsTest {
 
     @Test
     public void executeQuery() {
-        PropTools sqlProperties = new PropTools(PathConsts.MYSQL_PROPERTIES_PATH);
+        PropHelper sqlProperties = new PropHelper(PathConsts.MYSQL_PROPERTIES_PATH);
         String sql = sqlProperties.getString(SqlConsts.TABLE_SQL_SCHEMA_TABLE);
-        PropTools configProperties =
-            new PropTools(PathConsts.CONFIG_PROPERTIES_PATH);
-        List<String> schemas = configProperties.getStrings(CfgUtils.DATABASE_NAME_SCHEMAS);
-        List<String> tables = configProperties.getStrings(CfgUtils.DATABASE_NAME_TABLES);
+        PropHelper configProperties =
+            new PropHelper(PathConsts.CONFIG_PROPERTIES_PATH);
+        List<String> schemas = configProperties.getStringList(CfgUtils.DATABASE_NAME_SCHEMAS);
+        List<String> tables = configProperties.getStringList(CfgUtils.DATABASE_NAME_TABLES);
         List<Object> params = Arrays.asList(schemas.get(0), tables.get(0));
         List<Map<String, String>> maps = DBUtils.list(sql, params);
         Assert.assertFalse(maps.isEmpty());