添加生成唯一单据编号功能

sql/jsh_erp.sql

@@ -5240,4 +5240,54 @@ alter table jsh_serial_number change delete_Flag delete_Flag varchar(1) DEFAULT
 -- ----------------------------
 -- 删除单据子表单据主表id字段对应外键约束
 -- ----------------------------
-ALTER TABLE jsh_depotitem DROP FOREIGN KEY jsh_depotitem_ibfk_1;
+ALTER TABLE jsh_depotitem DROP FOREIGN KEY jsh_depotitem_ibfk_1;
+-- ----------------------------
+-- 时间：2019年2月1日
+-- version：1.0.2
+-- 此次更新添加sequence表，用于获取一个唯一的数值
+-- 特别提醒：之后的sql都是在之前基础上迭代，可以对已存在的系统进行数据保留更新
+-- ----------------------------
+-- ----------------------------
+-- 添加表tbl_sequence
+-- ----------------------------
+DROP TABLE IF EXISTS `tbl_sequence`;
+CREATE TABLE tbl_sequence (
+  seq_name VARCHAR(50) NOT NULL COMMENT '序列名称',
+  minvalue bigint(20) NOT NULL COMMENT '最小值',
+  maxvalue bigint(20) NOT NULL COMMENT '最大值',
+  current_val bigint(20) NOT NULL COMMENT '当前值',
+  increment_val INT DEFAULT '1' NOT NULL COMMENT '增长步数',
+  remark VARCHAR(500) DEFAULT null  COMMENT '备注',
+  PRIMARY KEY (seq_name)
+  )ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='sequence表';
+
+-- ----------------------------
+-- 添加表单据编号sequence
+-- ----------------------------
+insert into tbl_sequence (seq_name, minvalue, maxvalue, current_val, increment_val,remark) values ('depot_number_seq', 1, 999999999999999999, 1, 1,'单据编号sequence');
+-- ----------------------------
+-- 创建function _nextval() 用于获取当前序列号
+-- ----------------------------
+DELIMITER //
+create function _nextval(name varchar(50))
+returns long
+begin
+declare _cur bigint;
+declare _maxvalue bigint;  -- 接收最大值
+declare _increment int; -- 接收增长步数
+set _increment = (select increment_val from tbl_sequence where seq_name = name);
+set _maxvalue = (select maxvalue from tbl_sequence where seq_name = name);
+set _cur = (select current_val from tbl_sequence where seq_name = name);
+update tbl_sequence                      -- 更新当前值
+ set current_val = _cur + increment_val
+ where seq_name = name ;
+if(_cur + _increment >= _maxvalue) then  -- 判断是都达到最大值
+      update tbl_sequence
+        set current_val = minvalue
+        where seq_name = name ;
+end if;
+return _cur;
+end;
+//
+DELIMITER ;
+

src/main/java/com/jsh/erp/constants/BusinessConstants.java

@@ -61,6 +61,16 @@ public class BusinessConstants {
      * 批量插入sql时最大的数据条数
      * */
     public static final int BATCH_INSERT_MAX_NUMBER = 500;
+    /**
+     * sequence名称
+     * */
+    //sequence返回字符串的最小长度
+    public static final Long SEQ_TO_STRING_MIN_LENGTH = 1000000L;
+    //sequence长度小于基准长度时前追加基础值
+    public static final String SEQ_TO_STRING_LESS_INSERT = "0";
+    //单据编号
+    public static final String DEPOT_NUMBER_SEQ = "depot_number_seq";
+
 
 
 

src/main/java/com/jsh/erp/controller/DepotHeadController.java

@@ -77,7 +77,8 @@ public class DepotHeadController {
         BaseResponseInfo res = new BaseResponseInfo();
         Map<String, Object> map = new HashMap<String, Object>();
         try {
-            String number = depotHeadService.buildNumber(type, subType, beginTime, endTime);
+//            String number = depotHeadService.buildNumber(type, subType, beginTime, endTime);
+            String number = depotHeadService.buildOnlyNumber();
             map.put("DefaultNumber", number);
             res.code = 200;
             res.data = map;

src/main/java/com/jsh/erp/datasource/mappers/DepotHeadMapperEx.java

@@ -107,4 +107,9 @@ public interface DepotHeadMapperEx {
      * 更新单据主表信息
      * */
     void updatedepotHead(DepotHead depotHead);
+
+    /**
+     * 获得一个全局唯一的数作为订单号的追加
+     * */
+     Long  getBuildOnlyNumber(@Param("seq_name") String seq_name);
 }

src/main/java/com/jsh/erp/service/depotHead/DepotHeadService.java

@@ -20,6 +20,7 @@ import com.jsh.erp.service.supplier.SupplierService;
 import com.jsh.erp.service.user.UserService;
 import com.jsh.erp.utils.StringUtil;
 import com.jsh.erp.utils.Tools;
+import lombok.Synchronized;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.dao.DataAccessException;
@@ -153,6 +154,26 @@ public class DepotHeadService {
         example.createCriteria().andIdIn(ids);
         return depotHeadMapper.updateByExampleSelective(depotHead, example);
     }
+    /**
+     * 创建一个唯一的序列号
+     * */
+    public  String buildOnlyNumber(){
+        Long buildOnlyNumber=null;
+        synchronized (this){
+            buildOnlyNumber= depotHeadMapperEx.getBuildOnlyNumber(BusinessConstants.DEPOT_NUMBER_SEQ);
+        }
+        if(buildOnlyNumber<BusinessConstants.SEQ_TO_STRING_MIN_LENGTH){
+           StringBuffer sb=new StringBuffer(buildOnlyNumber.toString());
+           int len=BusinessConstants.SEQ_TO_STRING_MIN_LENGTH.toString().length()-sb.length();
+            for(int i=0;i<len;i++){
+                sb.insert(0,BusinessConstants.SEQ_TO_STRING_LESS_INSERT);
+            }
+            return sb.toString();
+        }else{
+            return buildOnlyNumber.toString();
+        }
+    }
+
 
     public String buildNumber(String type, String subType, String beginTime, String endTime) {
         String newNumber = "0001"; //新编号

src/main/resources/mapper_xml/DepotHeadMapperEx.xml

@@ -389,5 +389,8 @@
         </set>
         where Id = #{id,jdbcType=BIGINT}
     </update>
+    <select id="getBuildOnlyNumber" resultType="java.lang.Long">
+      select _nextval(#{seq_name}) from dual;
+    </select>
 
 </mapper>