feat(common): add exception handling and response utilities

backend project initial！！！

weblog-web/build.gradle.kts

@@ -13,6 +13,9 @@ dependencies {
     // Test
     testImplementation("org.springframework.boot:spring-boot-starter-test")
 
+    // jsr380
+    implementation("org.springframework.boot:spring-boot-starter-validation")
+
     // 其他依赖…
     implementation(project(":weblog-module-common"))
     implementation(project(":weblog-module-admin"))

weblog-web/src/main/java/com/hanserwei/web/controller/TestController.java

@@ -3,19 +3,36 @@ package com.hanserwei.web.controller;
 import com.hanserwei.common.aspect.ApiOperationLog;
 import com.hanserwei.web.model.User;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.BindingResult;
+import org.springframework.validation.FieldError;
+import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RestController;
 
+import java.util.stream.Collectors;
+
 @RestController
 @Slf4j
 public class TestController {
 
     @PostMapping("/test")
     @ApiOperationLog(description = "测试接口")
-    public User test(@RequestBody User user) {
+    public ResponseEntity<String> test(@RequestBody @Validated User user, BindingResult bindingResult) {
+        // 是否存在校验错误
+        if (bindingResult.hasErrors()) {
+            // 获取校验不通过字段的提示信息
+            String errorMsg = bindingResult.getFieldErrors()
+                    .stream()
+                    .map(FieldError::getDefaultMessage)
+                    .collect(Collectors.joining(", "));
+
+            return ResponseEntity.badRequest().body(errorMsg);
+        }
+
         // 返参
-        return user;
+        return ResponseEntity.ok("参数没有任何问题");
     }
 
 }

weblog-web/src/main/java/com/hanserwei/web/model/User.java

@@ -1,11 +1,25 @@
 package com.hanserwei.web.model;
 
+import jakarta.validation.constraints.*;
 import lombok.Data;
 
 @Data
 public class User {
-	// 用户名
+    // 用户名
+    @NotBlank(message = "用户名不能为空") // 注解确保用户名不为空
     private String username;
     // 性别
+    @NotNull(message = "性别不能为空") // 注解确保性别不为空
     private Integer sex;
+
+    // 年龄
+    @NotNull(message = "年龄不能为空")
+    @Min(value = 18, message = "年龄必须大于或等于 18")  // 注解确保年龄大于等于 18
+    @Max(value = 100, message = "年龄必须小于或等于 100")  // 注解确保年龄小于等于 100
+    private Integer age;
+
+    // 邮箱
+    @NotBlank(message = "邮箱不能为空")
+    @Email(message = "邮箱格式不正确")  // 注解确保邮箱格式正确
+    private String email;
 }