添加查询书籍；BookDO映射文件更新；DOMapper添加@Repository注解；添加自定义业务异常处理；添加Validation验证

bookshelfplus/src/main/java/plus/bookshelf/Common/Enum/Language.java

@@ -1,15 +0,0 @@
-package plus.bookshelf.Common.Enum;
-
-public enum Language {
-    SIMPLIFIED_CHINESE(1000, "简体中文"),
-    ENGLISH(1001, "English"),
-    TRADITIONAL_CHINESE(1001, "繁体中文");
-
-    private Language(Integer langId, String langName) {
-        this.langId = langId;
-        this.langName = langName;
-    }
-
-    private Integer langId;
-    private String langName;
-}

bookshelfplus/src/main/java/plus/bookshelf/Common/Error/BusinessErrorCode.java

@@ -0,0 +1,38 @@
+package plus.bookshelf.Common.Error;
+
+public enum BusinessErrorCode implements CommonError {
+    // 通用错误类型 10001
+    PARAMETER_VALIDATION_ERROR(10001, "参数不合法"),
+    UNKNOWN_ERROR(10002, "未知错误"),
+
+    // 20000开头为用户信息相关错误定义
+    USER_NOT_EXIST(20001, "用户不存在"),
+    USER_LOGIN_FAILED(20002, "用户手机号或密码不正确"),
+    USER_NOT_LOGIN(20003, "用户还未登录");
+
+
+    private BusinessErrorCode(int errCode, String errMsg) {
+        this.errCode = errCode;
+        this.errMsg = errMsg;
+    }
+
+    private int errCode;
+    private String errMsg;
+
+    @Override
+    public int getErrCode() {
+        return this.errCode;
+    }
+
+    @Override
+    public String getErrMsg() {
+        return this.errMsg;
+    }
+
+    @Override
+    public CommonError setErrMsg(String errMsg) {
+        this.errCode = errCode;
+        this.errMsg = errMsg;
+        return this;
+    }
+}

bookshelfplus/src/main/java/plus/bookshelf/Common/Error/BusinessException.java

@@ -0,0 +1,37 @@
+package plus.bookshelf.Common.Error;
+
+/**
+ * 包装器业务异常类实现
+ */
+public class BusinessException extends Exception implements CommonError {
+
+    private CommonError commonError;
+
+    public BusinessException(CommonError commonError) {
+        super();
+        this.commonError = commonError;
+    }
+
+    // 接收自定义errMsg的方式构造业务异常
+    public BusinessException(CommonError commonError,String errMsg){
+        super();
+        this.commonError=commonError;
+        this.commonError.setErrMsg(errMsg);
+    }
+
+    @Override
+    public int getErrCode() {
+        return this.commonError.getErrCode();
+    }
+
+    @Override
+    public String getErrMsg() {
+        return this.commonError.getErrMsg();
+    }
+
+    @Override
+    public CommonError setErrMsg(String errMsg) {
+        this.commonError.setErrMsg(errMsg);
+        return this;
+    }
+}

bookshelfplus/src/main/java/plus/bookshelf/Common/Error/CommonError.java

@@ -0,0 +1,7 @@
+package plus.bookshelf.Common.Error;
+
+public interface CommonError {
+    public int getErrCode();
+    public String getErrMsg();
+    public CommonError setErrMsg(String errMsg);
+}

bookshelfplus/src/main/java/plus/bookshelf/Common/Validator/ValidationResult.java

@@ -0,0 +1,35 @@
+package plus.bookshelf.Common.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;
+    }
+}

bookshelfplus/src/main/java/plus/bookshelf/Common/Validator/ValidatorImpl.java

@@ -0,0 +1,37 @@
+package plus.bookshelf.Common.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();
+    }
+}