update TableToJsonConfig for postgresql

Author: litongjava

docs/zh/15_table-to-json/04.md

@@ -145,7 +145,8 @@ public class TableToJsonConfig {
 
 **配置方式 2:不添加类到 AOP 容器**
 
-```
+```java
+package com.litongjava.tio.boot.admin.config;
 import javax.sql.DataSource;
 
 import com.jfinal.template.Engine;
@@ -154,6 +155,7 @@ import com.litongjava.jfinal.aop.annotation.AConfiguration;
 import com.litongjava.jfinal.aop.annotation.AInitialization;
 import com.litongjava.jfinal.plugin.activerecord.ActiveRecordPlugin;
 import com.litongjava.jfinal.plugin.activerecord.OrderedFieldContainerFactory;
+import com.litongjava.jfinal.plugin.activerecord.dialect.PostgreSqlDialect;
 import com.litongjava.jfinal.plugin.hikaricp.DsContainer;
 import com.litongjava.tio.boot.constatns.TioBootConfigKeys;
 import com.litongjava.tio.boot.server.TioBootServer;
@@ -207,6 +209,8 @@ public class TableToJsonConfig {
       arp.setDevMode(true);
     }
 
+    arp.setDialect(new PostgreSqlDialect());
+
     // config engine
     Engine engine = arp.getEngine();
     engine.setSourceFactory(new ClassPathSourceFactory());
@@ -220,6 +224,7 @@ public class TableToJsonConfig {
     TioBootServer.me().addDestroyMethod(arp::stop);
   }
 }
+
 ```
 
 #### 编写 Controller