void test_save_1(@Param("relatedBookCategoryEntity") RelatedBookCategoryEntity relatedBookCategoryEntity11, BookEntity bookEntity11, String categoryName11,Integer age11);
void test_save_2(RelatedBookCategoryEntity relatedBookCategoryEntity22, BookEntity bookEntity22, String categoryName22,Integer age22);
void test_save_3(String categoryName33);
void test_save_4( String categoryName22,Integer age22);
void test_save_5(RelatedBookCategoryEntity relatedBookCategoryEntity22);
以上是測試的接口,方法簽名下方圖片是攔截器內部形參的值結構。
以下是Java代碼,實現mybatis的Interceptor接口
package cn.dmahz.config; import cn.dmahz.dao.mapper.RelatedBookCategoryMapper; import cn.dmahz.entity.Base; import cn.dmahz.entity.BookEntity; import cn.dmahz.entity.RelatedBookCategoryEntity; import cn.dmahz.utils.MyReflectUtils; import cn.dmahz.utils.SecurityContextHolderUtils; import org.apache.commons.lang3.StringUtils; import org.apache.ibatis.annotations.Param; import org.apache.ibatis.executor.Executor; import org.apache.ibatis.executor.statement.StatementHandler; import org.apache.ibatis.mapping.MappedStatement; import org.apache.ibatis.mapping.SqlCommandType; import org.apache.ibatis.plugin.Interceptor; import org.apache.ibatis.plugin.Intercepts; import org.apache.ibatis.plugin.Invocation; import org.apache.ibatis.plugin.Signature; import org.springframework.data.annotation.*; import org.springframework.stereotype.Component; import java.lang.reflect.Field; import java.lang.reflect.Method; import java.lang.reflect.Parameter; import java.sql.Statement; import java.util.*; /** * @author Dream */ @Component @Intercepts({@Signature(type = Executor.class, method = "update", args = {MappedStatement.class, Object.class }),@Signature(type= StatementHandler.class,method = "parameterize",args = {Statement.class}) }) public class MybatisEntityPluginInterceptor implements Interceptor { @Override public Object intercept(Invocation invocation) throws Throwable { Object[] args = invocation.getArgs(); if(args[0] instanceof MappedStatement){ // 映射的各種信息,SQL信息、接口方法對應的參數、接口方法的全名稱等等 MappedStatement mappedStatement = (MappedStatement) args[0]; // 獲取執行語句的類型 SqlCommandType sqlCommandType = mappedStatement.getSqlCommandType(); if(args[1] instanceof HashMap<?, ?>){ HashMap<?,?> hashMap = (HashMap<?, ?>) args[1]; // 這裏分別處理每個參數的實體注入 // mappedStatement.getId() -> 獲取方法的全路徑 ;例如: cn.xxx.xxx.xxx.ClassName.methodName Method methodInMapper = MyReflectUtils.getMethodInMapper(mappedStatement.getId()); String[] paramKeys = parseParamKeysByMethod(methodInMapper); for(String key:paramKeys){ Object o = hashMap.get(key); if(o instanceof List){ List<?> list = (List<?>) o; for(Object entity:list){ Field[] allAuditFields = MyReflectUtils.getAllAuditFields(entity.getClass()); setAuditField(sqlCommandType,entity,allAuditFields); } }else if(o instanceof Base){ // 這裏處理不是集合的情況,通過繼承 cn.dmahz.entity.Base,可證明爲Java Bean Field[] allAuditFields = MyReflectUtils.getAllAuditFields(o.getClass()); setAuditField(sqlCommandType,o,allAuditFields); } } } else if(args[1] instanceof Base){ Object o =args[1]; // 這裏處理不是集合的情況,通過繼承 cn.dmahz.entity.Base,可證明爲Java Bean Field[] allAuditFields = MyReflectUtils.getAllAuditFields(o.getClass()); setAuditField(sqlCommandType,o,allAuditFields); } } // 讓攔截器繼續處理剩餘的操作 return invocation.proceed(); } /** * 解析方法的形參的key值,key值用於在 ParamMap中查找值,進行填充審計字段 * @param method */ private String[] parseParamKeysByMethod(Method method){ ArrayList<String> keyList = new ArrayList<>(); Parameter[] parameters = method.getParameters(); for (Parameter parameter:parameters) { Param parameterAnnotation = parameter.getAnnotation(Param.class); if(parameterAnnotation != null){ keyList.add(parameterAnnotation.value()); }else { // 形參名稱 String name = parameter.getName(); // 類型的簡寫名稱 // String simpleName = parameter.getType().getSimpleName(); if(StringUtils.isNotBlank(name)){ keyList.add(name); } } } return keyList.toArray(new String[0]); } /** * 包裝一下重複的代碼,方便調用 * @param sqlCommandType * @param o * @param fields * @throws IllegalAccessException */ private void setAuditField(SqlCommandType sqlCommandType,Object o,Field[] fields) throws IllegalAccessException{ for(Field field:fields){ setAuditField(sqlCommandType,o,field); } } /** * 設置審計字段,包括創建人,主鍵ID,創建時間,更新人,更新時間。 * @param sqlCommandType * @param o * @param field * @throws IllegalAccessException */ private void setAuditField(SqlCommandType sqlCommandType,Object o,Field field) throws IllegalAccessException { if(sqlCommandType == SqlCommandType.INSERT){ if(field.isAnnotationPresent(CreatedBy.class)){ String currentUserId; try { currentUserId = SecurityContextHolderUtils.getCurrentUserId(); } catch (NullPointerException e) { //這裏僅作測試,忽略空指針異常 currentUserId = "非Web環境,當前用戶ID測試值(創建值)"; } field.set(o,currentUserId); }else if(field.isAnnotationPresent(CreatedDate.class)){ field.set(o,System.currentTimeMillis()); }else if(field.isAnnotationPresent(Id.class)){ String uuId = UUID.randomUUID().toString(); field.set(o,uuId.replace("-","")); } }else if(sqlCommandType == SqlCommandType.UPDATE){ if(field.isAnnotationPresent(LastModifiedBy.class)){ String currentUserId; try { currentUserId = SecurityContextHolderUtils.getCurrentUserId(); } catch (NullPointerException e) { //這裏僅作測試,忽略空指針異常 currentUserId = "非Web環境,當前用戶ID測試值(更新值)"; } field.set(o,currentUserId); }else if(field.isAnnotationPresent(LastModifiedDate.class)){ field.set(o,System.currentTimeMillis()); } } } public static void main(String[] args) throws InterruptedException, NoSuchMethodException { Method test_save_1 = RelatedBookCategoryMapper.class.getDeclaredMethod("test_save_1", RelatedBookCategoryEntity.class, BookEntity.class, String.class); // parseParamKeysByMethod(test_save_1); } }