优化校验规则

src/main/java/com/cxyxiaomo/flashsale/service/impl/UserServiceImpl.java

@@ -8,6 +8,8 @@ import com.cxyxiaomo.flashsale.error.BusinessException;
 import com.cxyxiaomo.flashsale.error.EmBusinessError;
 import com.cxyxiaomo.flashsale.service.UserService;
 import com.cxyxiaomo.flashsale.service.model.UserModel;
+import com.cxyxiaomo.flashsale.validator.ValidationResult;
+import com.cxyxiaomo.flashsale.validator.ValidatorImpl;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -20,9 +22,13 @@ public class UserServiceImpl implements UserService {
 
     @Autowired
     private UserDOMapper userDOMapper;
+
     @Autowired
     private UserPasswordDOMapper userPasswordDOMapper;
 
+    @Autowired
+    private ValidatorImpl validator;
+
     @Override
     public UserModel getUserById(Integer id) {
         // 调用UserDataObjectMapper获取到对应的用户DataObject
@@ -60,11 +66,11 @@ public class UserServiceImpl implements UserService {
         if (userModel == null) {
             throw new BusinessException(EmBusinessError.PARAMETER_VALIDATION_ERROR);
         }
-        if (StringUtils.isEmpty(userModel.getName())
-                || userModel.getGender() == null
-                || userModel.getAge() == null
-                || StringUtils.isEmpty(userModel.getTelephone())) {
-            throw new BusinessException(EmBusinessError.PARAMETER_VALIDATION_ERROR);
+
+        // （优化校验规则）
+        ValidationResult result = validator.validate(userModel);
+        if (result.isHasErrors()) {
+            throw new BusinessException(EmBusinessError.PARAMETER_VALIDATION_ERROR, result.getErrMsg());
         }
 
         // 实现 model -> dataobject 方法

src/main/java/com/cxyxiaomo/flashsale/service/model/UserModel.java

@@ -1,14 +1,33 @@
 package com.cxyxiaomo.flashsale.service.model;
 
+
+import javax.validation.constraints.Max;
+import javax.validation.constraints.Min;
+import javax.validation.constraints.NotBlank;
+import javax.validation.constraints.NotNull;
+
 public class UserModel {
     private Integer id;
+
+    @NotBlank(message = "用户名不能为空")
     private String name;
+
+    @NotNull(message = "姓名不能不填写")
     private Byte gender;
+
+    @NotNull(message = "年龄不能不填写")
+    @Min(value = 0, message = "年龄必须大于0")
+    @Max(value = 150, message = "年龄必须小于150")
     private Integer age;
+
+    @NotBlank(message = "手机号不能为空")
     private String telephone;
+
     private String registerMode;
+
     private String thirdPartyId;
 
+    @NotBlank(message = "密码不能为空")
     private String encryptPassword;
 
     public Integer getId() {

src/main/java/com/cxyxiaomo/flashsale/validator/ValidationResult.java

@@ -0,0 +1,35 @@
+package com.cxyxiaomo.flashsale.validator;
+
+import org.apache.commons.lang3.StringUtils;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class ValidationResult {
+    // 校验结果是否有错
+    private boolean hasErrors = false;
+
+    // 存放错误信息的Map
+    private Map<String, String> errMsgMap = new HashMap<>();
+
+    // 实现通用的通过格式化字符串信息获取错误结果的msg方法
+    public String getErrMsg() {
+        return StringUtils.join(errMsgMap.values().toArray(), ",");
+    }
+
+    public boolean isHasErrors() {
+        return hasErrors;
+    }
+
+    public void setHasErrors(boolean hasErrors) {
+        this.hasErrors = hasErrors;
+    }
+
+    public Map<String, String> getErrMsgMap() {
+        return errMsgMap;
+    }
+
+    public void setErrMsgMap(Map<String, String> errMsgMap) {
+        this.errMsgMap = errMsgMap;
+    }
+}

src/main/java/com/cxyxiaomo/flashsale/validator/ValidatorImpl.java

@@ -0,0 +1,37 @@
+package com.cxyxiaomo.flashsale.validator;
+
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.stereotype.Component;
+
+import javax.validation.ConstraintViolation;
+import javax.validation.Validation;
+import javax.validation.Validator;
+import java.util.Set;
+
+@Component
+public class ValidatorImpl implements InitializingBean {
+
+    private Validator validator;
+
+    // 实现校验方法并返回校验结果
+    public ValidationResult validate(Object bean) {
+        ValidationResult result = new ValidationResult();
+        Set<ConstraintViolation<Object>> constraintViolationSet = validator.validate(bean);
+        if (constraintViolationSet.size() > 0) {
+            // 有错误
+            result.setHasErrors(true);
+            constraintViolationSet.forEach(constraintViolation -> {
+                String errMsg = constraintViolation.getMessage();
+                String propertyName = constraintViolation.getPropertyPath().toString();
+                result.getErrMsgMap().put(propertyName, errMsg);
+            });
+        }
+        return result;
+    }
+
+    @Override
+    public void afterPropertiesSet() throws Exception {
+        // 将Hibernate Validator通过工厂的初始化方式使其实例化
+        this.validator = (Validator) Validation.buildDefaultValidatorFactory().getValidator();
+    }
+}