MongoTemplate automatic injection failure-CodePudding

In the idea of using gradle created a mongo's demo, in the process of start an error prompt MongoTemplate injection failed, how to solve this problem?
1. Build. Gradle below

 plugins {
Org. Springframework. Id 'boot' version '2.2.6. RELEASE' 
Id 'IO. Spring. The dependency - management' version '1.0.9. RELEASE' 
Id 'Java' 
} 

Group='com. Example:' 
Version='0.0.1 - the SNAPSHOT' 
SourceCompatibility='1.8' 

Configurations {
DevelopmentOnly 
RuntimeClasspath {
ExtendsFrom developmentOnly 
} 
CompileOnly {
ExtendsFrom annotationProcessor 
} 
} 

Repositories {
MavenCentral () 
} 

Dependencies {
Implementation 'org. Springframework. The boot: spring - the boot - starter - web' 
Implementation 'org. Springframework. The boot: spring - the boot - starter - data - directing a' 
CompileOnly 'org. Projectlombok: lombok' 
AnnotationProcessor 'org. Projectlombok: lombok' 

TestImplementation (' org. Springframework. The boot: spring - the boot - starter - test ') {
Exclude group: 'org. Junit. Vintage, module:' junit - vintage - engine '
} 
TestImplementation 'org. Springframework. Security: spring ws-security - test' 
} 

The test {
UseJUnitPlatform () 
}

2. The location error

 package com. Example. The demo. The controller; 

The import com. Example. Demo. Model. The request. The User; 
The import com. Example. Demo. Model. The response. The Result; 
The import org. Springframework. Beans. Factory. The annotation. Autowired; 
The import org. Springframework. Data. The mongo. Core. MongoTemplate; 
The import org. Springframework. Web. Bind. The annotation. PostMapping; 
The import org. Springframework. Web. Bind. The annotation. RequestBody; 
The import org. Springframework. Web. Bind. The annotation. RestController; 

@ RestController 
Public class UserController {

The @autowired 
Private MongoTemplate MongoTemplate; 

@ PostMapping ("/createUser ") 
Public Result createUser (@ RequestBody User User) throws the Exception {
MongoTemplate. Save (user); 
Result the Result=new Result (" success "); 
return result; 
} 
}

3. An error below

 escription: 

Field mongoTemplate in com. Example. Demo. Controller. The UserController required a bean of type 'org. Springframework. Data. The mongo. Core. MongoTemplate' that could not be found. 

The injection point has The following annotations: 
- the @ org. Springframework. Beans. Factory. The annotation. Autowired (required=true) 

The following candidates were found but could not be injected: 
- Bean method 'mongoTemplate' 'MongoDbFactoryDependentConfiguration' not in the loaded because @ ConditionalOnBean (types: org. Springframework. Data. The mongo. MongoDbFactory; SearchStrategy: all) did not find any beans of type org. Springframework. Data. The mongo. MongoDbFactory 


Action: 

Consider revisiting the entries above or defining a bean of type 'org. Springframework. Data. The mongo. Core. MongoTemplate' in your configuration.