Update Seata example configuration and documentation！

spring-cloud-alibaba-examples/seata-example/account-service/src/main/resources/application.yml

@@ -40,10 +40,7 @@ seata:
     type: nacos
 
     nacos:
-      namespace: a3f588d3-7be9-43d3-af7c-1e7919cf8af6
       serverAddr: 127.0.0.1:8848
-
-      group: SEATA_GROUP
       dataId: "seata.properties"
       username: "nacos"
       password: "nacos"
@@ -52,7 +49,5 @@ seata:
     nacos:
       application: seata-server
       server-addr: 127.0.0.1:8848
-      group: SEATA_GROUP
-      namespace: a3f588d3-7be9-43d3-af7c-1e7919cf8af6
       username: "nacos"
       password: "nacos"

spring-cloud-alibaba-examples/seata-example/business-service/src/main/resources/application.yml

@@ -20,9 +20,7 @@ seata:
   config:
     type: nacos
     nacos:
-      namespace: a3f588d3-7be9-43d3-af7c-1e7919cf8af6
       serverAddr: 127.0.0.1:8848
-      group: SEATA_GROUP
       dataId: "seata.properties"
       username: "nacos"
       password: "nacos"
@@ -31,8 +29,6 @@ seata:
     nacos:
       application: seata-server
       server-addr: 127.0.0.1:8848
-      group: SEATA_GROUP
-      namespace: a3f588d3-7be9-43d3-af7c-1e7919cf8af6
       username: "nacos"
       password: "nacos"
 

spring-cloud-alibaba-examples/seata-example/order-service/src/main/resources/application.yml

@@ -38,9 +38,7 @@ seata:
   config:
     type: nacos
     nacos:
-      namespace: a3f588d3-7be9-43d3-af7c-1e7919cf8af6
       serverAddr: 127.0.0.1:8848
-      group: SEATA_GROUP
       dataId: "seata.properties"
       username: "nacos"
       password: "nacos"
@@ -49,12 +47,5 @@ seata:
     nacos:
       application: seata-server
       server-addr: 127.0.0.1:8848
-      group: SEATA_GROUP
-      namespace: a3f588d3-7be9-43d3-af7c-1e7919cf8af6
       username: "nacos"
       password: "nacos"
-dubbo:
-  registry:
-    address: spring-cloud://localhost
-  cloud:
-    subscribed-services:

spring-cloud-alibaba-examples/seata-example/readme-zh.md

@@ -63,7 +63,8 @@ CREATE TABLE `undo_log` (
   UNIQUE KEY `ux_undo_log` (`xid`,`branch_id`)
 ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
 ```
-### 创建 seata-server 所需要的数据库表
+### 导入 seata-server db模式所需要的数据库表
+在数据库中初始化[global_table、branch_table、lock_table、distributed_lock]
 点击查看:https://github.com/seata/seata/blob/1.5.0/script/server/db/mysql.sql
 ```$sql
 -- -------------------------------- The script used when storeMode is 'db' --------------------------------
@@ -173,7 +174,7 @@ CREATE TABLE `account_tbl` (
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 ```
 
-### 启动 Seata Server
+### 启动 Seata Server 这里介绍SpringBoot 和下载server两种方式
 
 1.运行 seata-server 启动Seata server
 示例中采用nacos 作为配置，注册中心 存储模式为：db 采用mysql 
@@ -186,7 +187,7 @@ sh seata-server.sh -p $LISTEN_PORT -m $MODE(file or db) -h $HOST -e $ENV
 ```
 -p seata-server 监听服务端口号   
 -m 存储模式，可选值：file、db。file 用于单点模式，db用于ha模式，当使用db存储模式，需要修改配置中store配置节点的数据库配置，同时在数据库中初始化[global_table、branch_table和 
-lock_table](https://github.com/seata/seata/blob/develop/server/src/main/resources/db_store.sql)   
+lock_table](https://github.com/seata/seata/blob/1.5.0/script/server/db/mysql.sql)   
 -h 用于解决seata-server和业务侧跨网络问题，其配置的host值直接显示到注册中心的服务可用地址host，当跨网络时这里需要配置为公网IP或NATIP，若都在同一局域网则无需配置   
 -e 用于解决多环境配置中心隔离问题   
 采用如下命令来启动 Seata Server

spring-cloud-alibaba-examples/seata-example/seata-server/src/main/resources/application.yml

@@ -1,3 +1,12 @@
+base:
+  config:
+    mdb:
+      hostname: 127.0.0.1
+      dbname: seata
+      port: 3306
+      username: root
+      password: 123456
+
 server:
   port: 7091
 
@@ -27,8 +36,6 @@ seata:
     type: nacos
     nacos:
       server-addr: 127.0.0.1:8848
-      namespace: a3f588d3-7be9-43d3-af7c-1e7919cf8af6
-      group: SEATA_GROUP
       username: nacos
       password: nacos
       ##if use MSE Nacos with auth, mutex with username/password attribute
@@ -42,8 +49,6 @@ seata:
     nacos:
       application: seata-server
       server-addr: 127.0.0.1:8848
-      group: SEATA_GROUP
-      namespace: a3f588d3-7be9-43d3-af7c-1e7919cf8af6
       cluster: default
       username: nacos
       password: nacos
@@ -65,9 +70,9 @@ seata:
       datasource: druid
       db-type: mysql
       driver-class-name: com.mysql.jdbc.Driver
-      url: jdbc:mysql://127.0.0.1:3306/seata?rewriteBatchedStatements=true
-      user: root
-      password: 123456
+      url: jdbc:mysql://${base.config.mdb.hostname}:${base.config.mdb.port}/${base.config.mdb.dbname}?rewriteBatchedStatements=true
+      user: ${base.config.mdb.username}
+      password: ${base.config.mdb.password}
       min-conn: 5
       max-conn: 100
       global-table: global_table
@@ -82,4 +87,4 @@ seata:
     secretKey: SeataSecretKey0c382ef121d778043159209298fd40bf3850a017
     tokenValidityInMilliseconds: 1800000
     ignore:
-      urls: /,/**/*.css,/**/*.js,/**/*.html,/**/*.map,/**/*.svg,/**/*.png,/**/*.ico,/console-fe/public/**,/api/v1/auth/login
+      urls: /,/**/*.css,/**/*.js,/**/*.html,/**/*.map,/**/*.svg,/**/*.png,/**/*.ico,/console-fe/public/**,/api/v1/auth/login

spring-cloud-alibaba-examples/seata-example/storage-service/src/main/resources/application.yml

@@ -38,10 +38,7 @@ seata:
   config:
     type: nacos
     nacos:
-      namespace: a3f588d3-7be9-43d3-af7c-1e7919cf8af6
       serverAddr: 127.0.0.1:8848
-
-      group: SEATA_GROUP
       dataId: "seata.properties"
       username: "nacos"
       password: "nacos"
@@ -50,8 +47,6 @@ seata:
     nacos:
       application: seata-server
       server-addr: 127.0.0.1:8848
-      group: SEATA_GROUP
-      namespace: a3f588d3-7be9-43d3-af7c-1e7919cf8af6
       username: "nacos"
       password: "nacos"