update edm doc

Signed-off-by: Nfangyun <fangyun2@huawei.com>

zh-cn/application-dev/reference/apis/Readme-CN.md

@@ -131,7 +131,7 @@
   - [@ohos.configPolicy (配置策略)](js-apis-config-policy.md)
   - [@ohos.enterpriseDeviceManager (企业设备管理)](js-apis-enterprise-device-manager.md)
   - [@ohos.EnterpriseAdminExtensionAbility (EnterpriseAdminExtensionAbility)](js-apis-EnterpriseAdminExtensionAbility.md)
-  - [enterpriseDeviceManager/DeviceSettingsManager(设备设置管理)](js-apis-enterpriseDeviceManager-DeviceSettingsManager.md)
+  - enterpriseDeviceManager/[DeviceSettingsManager(设备设置管理)](js-apis-enterpriseDeviceManager-DeviceSettingsManager.md)
 - 安全
 
   - [@ohos.abilityAccessCtrl (访问控制管理)](js-apis-abilityAccessCtrl.md)

zh-cn/application-dev/reference/apis/js-apis-enterpriseDeviceManager-DeviceSettingsManager.md

@@ -37,17 +37,22 @@ setDateTime(admin: Want, time: number, callback: AsyncCallback<void>): void
 **示例：**
 
 ```js
+import enterpriseDeviceManager from '@ohos.enterpriseDeviceManager'
+
 let wantTemp = {
     bundleName: "bundleName",
     abilityName: "abilityName",
 };
-let deviceSettingsMgr = enterpriseDeviceManager.getDeviceSettingsManager();
-deviceSettingsMgr.setDateTime(wantTemp, 1526003846000, (error, value) => { 
+enterpriseDeviceManager.getDeviceSettingsManager((error, mgr) => {
     if (error) {
-        console.log(error);
-    } else {
-        console.log(value);
+        console.log("error code:" + error.code + " error message:" + error.message);
+        return;
     }
+    mgr.setDateTime(wantTemp, 1526003846000, (error) => {
+        if (error) {
+            console.log("error code:" + error.code + " error message:" + error.message);
+        }
+    });
 });
 ```
 
@@ -78,14 +83,18 @@ setDateTime(admin: Want, time: number): Promise<void>
 **示例：**
 
 ```js
+import enterpriseDeviceManager from '@ohos.enterpriseDeviceManager'
+
 let wantTemp = {
     bundleName: "bundleName",
     abilityName: "abilityName",
 };
-let deviceSettingsMgr = enterpriseDeviceManager.getDeviceSettingsManager();
-deviceSettingsMgr.setDateTime(wantTemp, 1526003846000).then((value) => {
-    console.log(value);
+enterpriseDeviceManager.getDeviceSettingsManager().then((mgr) => {
+    mgr.setDateTime(wantTemp, 1526003846000).then(() => {
+    }).catch((error) => {
+        console.log("error code:" + error.code + " error message:" + error.message);
+    })
 }).catch((error) => {
-    console.log(error);
+    console.log("error code:" + error.code + " error message:" + error.message);
 })
 ```