上传文件至 'code/springboot/newBank/src/main/java/demo/zhangjialei/controller'

code/springboot/newBank/src/main/java/demo/zhangjialei/controller/makeNo.java

@@ -0,0 +1,51 @@
+package demo;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import javax.servlet.http.HttpServletRequest;
+import java.util.List;
+import java.util.Map;
+
+@RestController
+public class makeNo {
+
+    @Autowired
+    private JdbcTemplate jdbcTemplate;
+
+    /*
+    * 表名： noMaker
+    *
+    * 字段：
+    *       noName  (varchar)
+    *       noValue (int)
+    * */
+
+    @RequestMapping("/makeNo")
+    public int makeNoFn(HttpServletRequest request){
+
+        // 接收编号名noName(String)
+        String noName = request.getParameter("noName");
+
+        // 向编号表查询 编号名noName是否已经存在
+        String sql_qry = String.format("select * from noMaker where noName = '%s'", noName);
+        List<Map<String, Object>> list = jdbcTemplate.queryForList(sql_qry);
+
+        if (list.size() != 0) {
+            // 若存在 则将 noValue +1
+            String sql_upd = String.format("update noMaker set noValue = noValue +1  where noName = '%s'", noName);
+            jdbcTemplate.update(sql_upd);
+
+        } else {
+            // 若不存在 则插入新行
+            String sql_ins = String.format("insert into noMaker (noName,noValue) value ('%s',1)", noName);
+            jdbcTemplate.update(sql_ins);
+        }
+
+        // 返回 noValue
+        String sql_sel = String.format("select noValue from noMaker where noName = '%s'", noName);
+        return (int) jdbcTemplate.queryForList(sql_sel).get(0).get("noValue");
+    }
+}