[modify]:增加注释

 ## DDL 脚本生成器
 ### 逻辑图
 设计请看逻辑图.png
-### 1. 使用步骤
+### 使用步骤
 1. 修改 DDLScriptCreatorTest 数据源。
 2. 运行 DDLScriptCreatorTest main 方法。
 3. 稍等一会就能在控制台看到 ddl 语句。

@@ -5,10 +5,15 @@ package com.seektruth.ddl.creator.datasource;
  * @author black
  */
 public class Datasource {
+    // 用户名
     private String username;
+    // 密码
     private String password;
+    // url
     private String url;
+    // 驱动类
     private String driverClass;
+    // 数据库名字
     private String databaseName;
     public String getUsername() {
         return username;

 package com.seektruth.ddl.creator.ddl;
 
+/**
+ * 数据库信息
+ */
 public class Database {
     public String ddl() {
         return "";

@@ -7,22 +7,22 @@ package com.seektruth.ddl.creator.ddl.oracle;
  *
  */
 public class OracleSequence {
-
+    // 序列名
     String name;
-
+    // 起始值
     String start;
-
+    // 递增值
     String increment;
-
+    // 最大值
     String maxvalue;
-
+    // 最小值
     String minvalue;
-
+    // 是否循环
     Boolean cycle;
-
+    // 是否缓存
     Boolean cache;
-
-    Integer cacheSize;
+    // 缓存数量
+    Integer cacheAmt;
 
     public String getName() {
         return name;
@@ -52,8 +52,8 @@ public class OracleSequence {
         return cache;
     }
 
-    public Integer getCacheSize() {
-        return cacheSize;
+    public Integer getCacheAmt() {
+        return cacheAmt;
     }
 
     public void setName(String name) {
@@ -84,8 +84,8 @@ public class OracleSequence {
         this.cache = cache;
     }
 
-    public void setCacheSize(Integer cacheSize) {
-        this.cacheSize = cacheSize;
+    public void setCacheAmt(Integer cacheSize) {
+        this.cacheAmt = cacheSize;
     }
 
     public String ddl() {
@@ -103,7 +103,7 @@ public class OracleSequence {
         }
 
         if (cache) {
-            buffer.append("cache ").append(cacheSize).append(" ");
+            buffer.append("cache ").append(cacheAmt).append(" ");
         } else {
             buffer.append("nocache ");
         }

@@ -6,28 +6,28 @@ package com.seektruth.ddl.creator.metadata;
  *
  */
 public class ColumnInfo {
-
+    // 表名
     private String tableName;
-
+    // 列名
     private String name;
     // java.sql.Types
     private Integer type;
 
     private String typeName;
-
+    // 列长度
     private Integer size;
-
+    // 列精度
     private Integer decimalDigits;
 
-    // 进制
+    // 进制（10进制还是2进制）
     private Integer radix;
-
+    // 可为空
     private Integer nullable;
-
+    // 注释
     private String comment;
-
+    // 默认值
     private String defaultValue;
-    // 序号
+    // 序号，在表中的位置
     private Integer index;
 
     private String is_nullable;

@@ -9,7 +9,7 @@ import java.util.List;
  *
  */
 public class DatabaseMetaDataInfo {
-
+    // 表
     private List<TableInfo> tables;
 
     public List<TableInfo> getTables() {

@@ -11,13 +11,13 @@ import java.util.function.Predicate;
  *
  */
 public class IndexInfo {
-    
+    // 表名
     private String tableName;
-
+    // 索引名
     private String name;
-    
+    // 是否唯一索引
     private Boolean nonUnique;
-    
+    // 索引的列
     private List<IndexColumnInfo> columns = new ArrayList<IndexColumnInfo>();
 
     public String getTableName() {

@@ -9,11 +9,11 @@ import java.util.List;
  *
  */
 public class PrimaryKeyInfo {
-
+    // 表名
     private String tableName;
-
+    // 主键名
     private String name;
-
+    // 主键的列信息
     private List<IndexColumnInfo> columns = new ArrayList<IndexColumnInfo>();
 
     public String getTableName() {

@@ -14,7 +14,7 @@ public class TableInfo {
     private String  schema ;
     // 表名
     private String name  ;
-    
+    // 表类型
     private String type ;
     // 表注释
     private String comment  ;

@@ -69,11 +69,11 @@ public class OracleTransfer implements Transfer<OracleDatabase> {
                 if (c.getNeedSquence()) {
                     if (isPkColumn) {
                         // 主键列的序列命名："表名_SEQ"
-                        sequence = createSequence(c.getLength(), table.getName() + "_SEQ");
+                        sequence = createSequence(c.getLength(), table.getName() + "_seq");
                     } else {
                         // 非主键列的序列命名："表名_字段名_SEQ"
                         sequence = createSequence(c.getLength(),
-                                table.getName() + "_" + columns.get(j).getName() + "_SEQ");
+                                table.getName() + "_" + columns.get(j).getName() + "_seq");
                     }
                 }
                 if(sequence != null) {
@@ -141,7 +141,7 @@ public class OracleTransfer implements Transfer<OracleDatabase> {
     public OracleSequence createSequence(String columnLength, String name) {
         OracleSequence sequence = new OracleSequence();
         sequence.setCache(true);
-        sequence.setCacheSize(20);
+        sequence.setCacheAmt(20);
         sequence.setCycle(false);
         sequence.setIncrement("1");
         sequence.setMinvalue("1");

@@ -8,7 +8,7 @@ import com.seektruth.ddl.creator.transfer.OracleTransfer;
 import com.seektruth.ddl.creator.transfer.Transfer;
 
 public class DDLScriptCreatorTest {
-    
+
     public static void main(String[] args) throws ClassNotFoundException {
         Datasource datasource = mysql();
         DatabaseMetaDataCollector collector = new MySQLDatabaseMetaDataCollector(datasource);
@@ -18,35 +18,32 @@ public class DDLScriptCreatorTest {
     }
 
     public static Datasource oracle() {
-        String devUrl="jdbc:oracle:thin:@localhost:1521:orcl?useInformationSchema=true";
-        String userName="dev_poc_rec";
-        String password="black";
+        String devUrl = "jdbc:oracle:thin:@localhost:1521:orcl?useInformationSchema=true";
+        String userName = "dev_poc_rec";
+        String password = "black";
         Datasource datasource = new Datasource();
         datasource.setDriverClass("oracle.jdbc.driver.OracleDriver");
         datasource.setUrl(devUrl);
         datasource.setUsername(userName);
         datasource.setPassword(password);
         datasource.setDatabaseName("orcl");
-        return  datasource;
+        return datasource;
     }
+
     public static Datasource mysql() {
-        //pedantic=true&
-        String devUrl="jdbc:mysql://rm-2zen60zh797n662w4lo.mysql.rds.aliyuncs.com:3306/dev_poc_rec?allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai&useInformationSchema=true&nullDatabaseMeansCurrent=true";
-        String userName="dev_poc_rec";
-        String password="HMTWBekcV116aZfoy18Au4";
-        
-//        String devUrl="jdbc:mysql://rm-2zen60zh797n662w4lo.mysql.rds.aliyuncs.com:3306/standard_bank_test?allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai&useInformationSchema=true&nullDatabaseMeansCurrent=true";
-//        String userName="standard_bank_ts";
-//        String password="cnX%Dio16YIKEWvt&UOdH";
-//        String devUrl="jdbc:mysql://rm-2zen60zh797n662w4lo.mysql.rds.aliyuncs.com:3306/poc-rec-bank?allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai&useInformationSchema=true&nullDatabaseMeansCurrent=true";
-//        String userName="poc_rec_bank";
-//        String password="f$FwIdm16Lp192qt014UT6o";
+        String databaseName = "database";
+        String driverClass = "com.mysql.cj.jdbc.Driver";
+        // url 必须拼接 “useInformationSchema=true&nullDatabaseMeansCurrent=true” 参数
+        String databaseUrl = "jdbc:mysql://localhost:3306/dev_poc_rec?allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai&useInformationSchema=true&nullDatabaseMeansCurrent=true";
+        String userName = "username";
+        String password = "password";
+
         Datasource datasource = new Datasource();
-        datasource.setDriverClass("com.mysql.cj.jdbc.Driver");
-        datasource.setUrl(devUrl);
+        datasource.setDriverClass(driverClass);
+        datasource.setUrl(databaseUrl);
         datasource.setUsername(userName);
         datasource.setPassword(password);
-        datasource.setDatabaseName("dev_poc_rec");
-        return  datasource;
+        datasource.setDatabaseName(databaseName);
+        return datasource;
     }
 }