执行POST服务为用户创建帖子

【执行POST服务为用户创建帖子】在本节中, 我们将启用后期操作以为特定用户创建帖子。
步骤1：打开UserJPAResource.java文件并创建一个PostMapping来创建一个帖子。

@PostMapping("/jpa/users/{id}/posts")public ResponseEntity< Object> createUser(@PathVariable int id, @RequestBody Post post) {Optional< User> userOptional= userRepository.findById(id); if(!userOptional.isPresent()){throw new UserNotFoundException("id: "+ id); }User user=userOptional.get(); //map the user to the postpost.setUser(user); //save post to the databasepostRepository.save(post); //getting the path of the post and append id of the post to the URI URI location=ServletUriComponentsBuilder.fromCurrentRequest().path("/{id}").buildAndExpand(post.getId()).toUri(); //returns the location of the created postreturn ResponseEntity.created(location).build(); }

步骤2：创建一个帖子库。
PostRepository.java

package com.srcmini.server.main.user; import org.springframework.data.jpa.repository.JpaRepository; import org.springframework.stereotype.Repository; @Repositorypublic interface PostRepository extends JpaRepository< Post, Integer> {}

第3步：打开邮递员并发送带有URI http：// localhost：8080 / jpa / users / 102 / posts的POST请求。在“正文”选项卡下, 插入帖子描述。