added changepassword

src/main/java/com/example/accessingdatamysql/MainController.java

@@ -6,6 +6,9 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.*;
 
+import java.util.Map;
+import java.util.Optional;
+
 @Controller // This means that this class is a Controller
 @RequestMapping(path="/user") // This means URL's start with /demo (after Application path)
 public class MainController {
@@ -35,12 +38,17 @@ public class MainController {
     @ResponseBody
     public User updateUser(@RequestBody Map<String, String> json)
     {
-        if (json.get("email"))
+        if (json.get("email") != null)
         {
-            User user = userRepository.findById(json.get("email"));
-            user.setPassword(json.get("password"));
-            userRepository.save(user);
-            return user;
+            Optional<User> user = userRepository.findById(json.get("email"));
+            if (user.isPresent())
+            {
+                User usr = user.get();
+                usr.setPassword(json.get("password"));
+                userRepository.save(usr);
+                return usr;
+            }
+            return null;
         }
         return null;
     }

src/main/java/com/example/accessingdatamysql/UserRepository.java

@@ -8,6 +8,6 @@ import com.example.accessingdatamysql.User;
 // This will be AUTO IMPLEMENTED by Spring into a Bean called userRepository
 // CRUD refers Create, Read, Update, Delete
 
-public interface UserRepository extends CrudRepository<User, Integer> {
+public interface UserRepository extends CrudRepository<User, String> {
 
 }
\ No newline at end of file

src/main/resources/application.properties

@@ -2,6 +2,6 @@
 spring.jpa.hibernate.ddl-auto=create
 spring.datasource.url=jdbc:mysql://${MYSQL_HOST:localhost}:3306/inventory
 spring.datasource.username=root
-spring.datasource.password=
+spring.datasource.password=czarthak
 spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
 #spring.jpa.show-sql: true
\ No newline at end of file