第11講 11.1 SpringBoot表單校驗
阿新 • • 發佈：2018-11-16
1，複製一個專案，改名為SpringDataValid，關閉其他專案， 以防干擾。右鍵專案，Maven，Update Project...
2，新建一個數據庫，db_studentinfo,修改配置檔案裡的資料庫連線。
| server: port: 8888 context-path: / spring: datasource: driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://localhost:3306/db_studentinfo password: root username: root jpa: hibernate: ddl-auto: update show-sql: true |
3，新建一個Student實體，指定表名 t_student,添加註解，Integer型別就不用加長度限制，姓名不能為空，年齡不能為空，且年齡不能小於18歲，
| package com.cruise.entity; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.Table; import javax.validation.constraints.Min; import javax.validation.constraints.NotBlank; import javax.validation.constraints.NotEmpty; import javax.validation.constraints.NotNull; @Entity @Table(name="t_student") public class Student { @Id @GeneratedValue private Integer id; @NotBlank(message="輸入的名字無效！") @NotEmpty(message="姓名不能為空！") @Column(length=50) private String name; @NotNull(message="年齡不能為空！") @Min(value=18,message="年齡必須大於18歲！") private Integer age; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } } |
4，StudentDao介面，新增繼承
| package com.cruise.dao; import org.springframework.data.jpa.repository.JpaRepository; import com.cruise.entity.Student; public interface StudentDao extends JpaRepository{ } |
5，StudentService介面，寫介面方法，新增學生資訊，
| package com.cruise.service; import com.cruise.entity.Student; public interface StudentService { public void add(Student student); } |
6，寫StudentServiceImpl 實現StudentService介面，注入StudentDao介面。刪除Account相關的類，方式干擾，
| package com.cruise.service.impl; import javax.annotation.Resource; import org.springframework.stereotype.Service; import com.cruise.dao.StudentDao; import com.cruise.entity.Student; import com.cruise.service.StudentService; /** * * @author pengc * */ @Service("studentService") public class StudentServiceImpl implements StudentService { @Resource private StudentDao studentDao; @Override public void add(Student student) { studentDao.save(student); } } |
7， 寫StudentController ，注入StudentService，新增RestController註解(和ResponseBody註解等價，區別在於ResponseBody註解是加在方法上的，)，自動轉成json。寫add()方法，新增學生資訊，
| package com.cruise.controller; import javax.annotation.Resource; import javax.validation.Valid; import org.springframework.validation.BindingResult; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import com.cruise.entity.Student; import com.cruise.service.StudentService; @RestController @RequestMapping("/student") public class StudentController { @Resource private StudentService studentService; @RequestMapping("/add") public String add(@Valid Student student,BindingResult bindingResult){ if(bindingResult.hasErrors()){ return bindingResult.getFieldError().getDefaultMessage(); }else{ studentService.add(student); return "新增成功！"; } } } |
8， 寫studentAdd.html 方法，匯入jquery，ajax 方式提交，