Spring boot 数据校验
- entity
1 package com.wiggin.entity; 2 3 import lombok.Data; 4 import org.hibernate.validator.constraints.Length; 5 6 import javax.validation.constraints.Min; 7 import javax.validation.constraints.NotEmpty; 8 import javax.validation.constraints.NotNull; 9 10 11 @Data 12 public class User { 13 @NotNull(message = "id不能为空") 14 private Long id; 15 @NotEmpty(message = "姓名不能为空") 16 @Length(min = 2,message = "姓名长度不能小于两位") 17 private String name; 18 @Min(value = 16,message = "年龄必须大于16") 19 private int age; 20 } |
- Handler
1 @GetMapping("/validatorUser") 2 public void validatorUser(@Valid User user, BindingResult bindingResult){ 3 // 打印user对象 4 System.out.println(user); 5 if (bindingResult.hasErrors()){ 6 // 获取所有error 7 List<ObjectError> list = bindingResult.getAllErrors(); 8 for (ObjectError objectError:list){ 9 // objectError.getCode() 为错误类型，objectError.getDefaultMessage()为错误信息 10 System.out.println(objectError.getCode() + "-" + objectError.getDefaultMessage()); 11 } 12 } 13 } |
Spring boot 整合JDBC
- pom.xml
1 <!-- 引入JDBC--> 2 <dependency> 3 <groupId>org.springframework.boot</groupId> 4 <artifactId>spring-boot-starter-jdbc</artifactId> 5 </dependency> 6 <dependency> 7 <groupId>mysql</groupId> 8 <artifactId>mysql-connector-java</artifactId> 9 <version>8.0.21</version> 10 </dependency> |
- application.yml
1 server: 2 port: 8080 3 spring: 4 thymeleaf: 5 prefix: classpath:/templates/ 6 suffix: .html 7 encoding: UTF-8 8 mode: HTML5 9 datasource: 10 url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8 11 username: root 12 password: 123456 13 driver-class-name: com.mysql.cj.jdbc.Driver |
- User
1 package com.wiggin.entity; 2 3 import lombok.AllArgsConstructor; 4 import lombok.Data; 5 import lombok.NoArgsConstructor; 6 import org.hibernate.validator.constraints.Length; 7 8 import javax.validation.constraints.Min; 9 import javax.validation.constraints.NotEmpty; 10 import javax.validation.constraints.NotNull; 11 12 13 @Data 14 @AllArgsConstructor 15 @NoArgsConstructor 16 public class User { 17 @NotNull(message = "id不能为空") 18 private Long id; 19 @NotEmpty(message = "姓名不能为空") 20 @Length(min = 2,message = "姓名长度不能小于两位") 21 private String name; 22 @Min(value = 60,message = "成绩必须大于60") 23 private double score; 24 } |
- UserRepository
1 package com.wiggin.repository; 2 3 import com.wiggin.entity.User; 4 5 import java.util.Collection; 6 import java.util.List; 7 8 public interface UserRepository { 9 public List<User> findAll(); 10 public User findById(long id); 11 public void save(User user); 12 public void update(User user); 13 public void deleteById(long id); 14 } |
- UserRepositoryImpl
1 package com.wiggin.repository.impl; 2 3 import com.wiggin.entity.User; 4 import com.wiggin.repository.UserRepository; 5 import org.springframework.beans.factory.annotation.Autowired; 6 import org.springframework.jdbc.core.BeanPropertyRowMapper; 7 import org.springframework.jdbc.core.JdbcTemplate; 8 import org.springframework.stereotype.Repository; 9 10 import java.util.Collection; 11 import java.util.List; 12 13 @Repository 14 public class UserRepositoryImpl implements UserRepository { 15 @Autowired 16 private JdbcTemplate jdbcTemplate; 17 @Override 18 public List<User> findAll() { 19 // new BeanPropertyRowMapper<>(User.class)映射实体类 20 return jdbcTemplate.query("select * from users ",new BeanPropertyRowMapper<>(User.class)); 21 } 22 23 @Override 24 public User findById(long id) { 25 26 return jdbcTemplate.queryForObject("select * from users where id = ?",new Object[]{id},new BeanPropertyRowMapper<>(User.class)); 27 } 28 29 @Override 30 public void save(User user) { 31 jdbcTemplate.update("insert into users(name,score) value (?,?)",user.getName(),user.getScore()); 32 } 33 34 @Override 35 public void update(User user) { 36 jdbcTemplate.update("update users set name = ?,score = ? where id = ?", user.getName(),user.getScore(),user.getId()); 37 } 38 39 40 @Override 41 public void deleteById(long id) { 42 jdbcTemplate.update("delete from users where id = ?",id); 43 } 44 } |
- UserHandler
1 package com.wiggin.controller; 2 3 import com.wiggin.entity.Student; 4 import com.wiggin.entity.User; 5 import com.wiggin.repository.UserRepository; 6 import org.springframework.beans.factory.annotation.Autowired; 7 import org.springframework.stereotype.Controller; 8 import org.springframework.web.bind.annotation.*; 9 10 import java.util.List; 11 12 @RestController 13 @RequestMapping("/user") 14 public class UserHandler { 15 16 @Autowired 17 private UserRepository userRepository; 18 19 @GetMapping("/findAll") 20 public List<User> findAll(){ 21 return userRepository.findAll(); 22 } 23 24 @GetMapping("/findById/{id}") 25 public User findById(@PathVariable("id") long id){ 26 return userRepository.findById(id); 27 } 28 29 @PostMapping("/save") 30 // @RequestBody User user把请求的body转为java对象，@ResponseBody把java对象转为body内容 31 public void save(@RequestBody User user){ 32 userRepository.save(user); 33 } 34 35 @PutMapping("/update") 36 // @RequestBody User user把请求的body转为java对象，@ResponseBody把java对象转为body内容 37 public void update(@RequestBody User user){ 38 userRepository.update(user); 39 } 40 41 @DeleteMapping("/deleteById/{id}") 42 public void deleteById(@PathVariable("id") long id){ 43 userRepository.deleteById(id); 44 } 45 |