登陆界面，优化成输入租户名

yudao-admin-server/src/main/java/cn/iocoder/yudao/adminserver/modules/system/controller/tenant/SysTenantController.java

@@ -0,0 +1,29 @@
+package cn.iocoder.yudao.adminserver.modules.system.controller.tenant;
+
+import cn.iocoder.yudao.framework.common.pojo.CommonResult;
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiImplicitParam;
+import io.swagger.annotations.ApiOperation;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.Objects;
+
+@Api(tags = "租户")
+@RestController
+@RequestMapping("/system/tenant")
+public class SysTenantController {
+
+    @GetMapping("/get-id-by-name")
+    @ApiOperation(value = "使用租户名，获得租户编号", notes = "登录界面，根据用户的租户名，获得租户编号")
+    @ApiImplicitParam(name = "name", value = "租户名", required = true, example = "芋道源码", dataTypeClass = Long.class)
+    public CommonResult<Long> getTenantIdByName(@RequestParam("name") String name) {
+        if (Objects.equals("芋道源码", name)) {
+            return CommonResult.success(0L);
+        }
+        return CommonResult.success(null);
+    }
+
+}