Spring Boot Validation

Author: jonssonyan

spring-boot-validation/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>com.jonssonyan</groupId>
+        <artifactId>spring-demo</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath> <!-- lookup parent from repository -->
+    </parent>
+
+    <artifactId>spring-boot-validation</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>springboot-validation</name>
+    <description>Demo project for Spring Boot Validation</description>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <encoding>UTF-8</encoding>
+        <java.version>8</java.version>
+        <maven.compiler.source>${java.version}</maven.compiler.source>
+        <maven.compiler.target>${java.version}</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-validation</artifactId>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+</project>

spring-boot-validation/src/main/java/com/jonssonyan/SpringBootValidationApplication.java

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+package com.jonssonyan;
+
+import com.jonssonyan.model.dto.ReqDto;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+import javax.validation.Valid;
+
+@SpringBootApplication
+@RestController
+public class SpringBootValidationApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringBootValidationApplication.class, args);
+    }
+
+    @PostMapping("signUp")
+    private String signUp(@RequestBody @Valid ReqDto dto) {
+        return "success";
+    }
+
+}

spring-boot-validation/src/main/java/com/jonssonyan/config/GlobalExceptionHandler.java

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+package com.jonssonyan.config;
+
+import org.springframework.validation.FieldError;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+import java.util.List;
+
+@RestControllerAdvice
+public class GlobalExceptionHandler {
+
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public String handleValidationException(MethodArgumentNotValidException e) {
+        List<FieldError> errors = e.getBindingResult().getFieldErrors();
+        StringBuilder errorMessage = new StringBuilder("参数错误:");
+        for (FieldError error : errors) {
+            errorMessage.append(error.getField())
+                    .append(" - ")
+                    .append(error.getDefaultMessage())
+                    .append("; ");
+        }
+        return errorMessage.toString();
+    }
+}

spring-boot-validation/src/main/java/com/jonssonyan/model/dto/ReqDto.java

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+package com.jonssonyan.model.dto;
+
+import lombok.Data;
+
+import javax.validation.constraints.Email;
+import javax.validation.constraints.Max;
+import javax.validation.constraints.Min;
+import javax.validation.constraints.NotBlank;
+import javax.validation.constraints.NotEmpty;
+import javax.validation.constraints.Past;
+import javax.validation.constraints.Size;
+import java.time.LocalDate;
+import java.util.List;
+
+@Data
+public class ReqDto {
+    @NotBlank(message = "用户名不能为空")
+    @Size(min = 6, max = 20, message = "用户名长度必须在6到20之间")
+    private String username;
+    @NotBlank(message = "密码不能为空")
+    @Size(min = 6, max = 20, message = "密码长度必须在6到20之间")
+    private String password;
+    @Email(message = "请输入有效的邮箱地址")
+    private String email;
+    @Max(value = 200, message = "年龄必须小于200")
+    @Min(value = 0, message = "年龄必须大于0")
+    private Integer age;
+    @NotEmpty(message = "教育经历不能为空")
+    private List<String> education;
+    @Past(message = "出生日期必须是过去的日期")
+    private LocalDate birthDate;
+}

spring-boot-validation/src/main/resources/application.properties

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+server.port=9036
+server.servlet.context-path=/validation
+spring.application.name=spring-boot-validation

spring-boot-validation/src/test/java/com/jonssonyan/SpringBootValidationApplicationTests.java

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+package com.jonssonyan;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class SpringBootValidationApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}