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阿里巴巴Java开发手册中的DO、DTO、BO、AO、VO、POJO定义

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分层领域模型规约： DO（ Data Object）：与数据库表结构一一对应，通过DAO层向上传输数据源对象。 DTO（ Data Transfer Object）：数据传输对象，Service或Manager向外传输的对象。 BO（ Business Object）：业务对象。由Service层输出的封装业务逻辑的对象。 AO（ Application Object）：应用对象。在Web层与Service层之间抽象的复用对象模型，极为贴近展示层，复用度不高。 VO（ View Object）：显示层对象，通常是Web向模板渲染引擎层传输的对象。 POJO（ Plain Ordinary Java Object）：在本手册中， POJO专指只有setter/getter/toString的简单类，包括DO/DTO/BO/VO等。 Query：数据查询对象，各层接收上层的查询请求。注意超过2个参数的查询封装，禁止使用Map类来传输。领域模型命名规约：数据对象：xxxDO，xxx即为数据表名。数据传输对象：xxxDTO，xxx为业务领域相关的名称。展示对象：xxxVO，xxx一般为网页名称。 POJO是DO/DTO/BO/VO的统称，禁止命名成xxxPOJO。来源： https://www.cnblogs.com/leodaxin/p/8372763.html

分层领域模型规约与领域模型命名规约

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分层领域模型规约与领域模型命名规约一、分层领域模型规约 DO（Data Object）：与数据库表结构一一对应，通过DAO层向上传输数据源对象。 DTO（Data Transfer Object）：数据传输对象，Service或Manager向外传输的对象。 BO（Business Object）：业务对象。由Service层输出的封装业务逻辑的对象。 AO（Application Object）：应用对象。在Web层与Service层之间抽象的复用对象模型，极为贴近展示层，复用度不高。 VO（View Object）：显示层对象，通常是Web向模板渲染引擎层传输的对象。 Query：数据查询对象，各层接收上层的查询请求。注意超过2个参数的查询封装，禁止使用Map类来传输。二、领域模型命名规约 1）数据对象：xxxDO，xxx即为数据表名。 2）数据传输对象：xxxDTO，xxx为业务领域相关的名称。 3）展示对象：xxxVO，xxx一般为网页名称。 4） POJO是DO/DTO/BO/VO的统称，禁止命名成xxxPOJO。来源： https://www.cnblogs.com/zfc-java/p/8215473.html

C++ Makefile. .o in different subdirectories

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问题 I have some problems trying to put .o files into a separate directory (/build). Actually, my sources (in /src) contain some subdirectories, and my Makefile only create the .o of the .cpp contained at the first "level". The other .o are just ignored, so, the target cannot be created. In my /src directory, I have "three levels" (src/first/second/). Here's the code of the Makefile : CC=g++ CFLAGS=-W -Wall -ansi -pedantic -s -O3 -Os -std=c++11 -fpermissive LDFLAGS= -lboost_system -lboost_regex

How would I access this object value?

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问题 I'm trying to echo and access the values stored in ["_aVars:private"] $obj->_vars and $obj->_vars:private doesnt work :( Here's the var_dump of $obj object(test_object)#15 (30) { ["sDisplayLayout"]=> string(8) "template" ["bIsSample"]=> bool(false) ["iThemeId"]=> int(0) ["sReservedVarname:protected"]=> string(6) "test" ["sLeftDelim:protected"]=> string(1) "{" ["sRightDelim:protected"]=> string(1) "}" ["_aPlugins:protected"]=> array(0) { } ["_aSections:private"]=> array(0) { } ["_aVars:private

Java object assignment behaviour not consistent?

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问题 According to this answer https://stackoverflow.com/a/12020435/562222 , assigning an object to another is just copying references, but let's see this code snippet: public class TestJava { public static void main(String[] args) throws IOException { { Integer x; Integer y = 223432; x = y; x += 23; System.out.println(x); System.out.println(y); } { Integer[] x; Integer[] y = {1,2, 3, 4, 5}; x = y; x[0] += 10; printArray(x); printArray(y); } } public static <T> void printArray(T[] inputArray) { for

How to assign to all class data members at once

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问题 In a Dapper ORM application, I want to assign one object to another, or all data members at once. Like this: public class TableA { public int UserId { get; set; } public string ClientId { get; set; } // ... more fields ... public bool Query() { bool Ok = false; try{ // Method A TableA Rec = QueryResultRecords.First(); MyCopyRec(Rec, this); // ugly // Method B this = QueryResultRecords.First(); // avoids CopyRec, does not work Ok = true; } catch(Exception e){ Ok = false; } return Ok; } } With

How to use cascade.xml for object recognition in openCV

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问题 I've generated cascade xml in openCV using haar training module.. Now how can I use it for Object recognition.? Please help.!! _/_ 回答1: Following opencv doc on Object Detection, you have to create the cascade detector object and ::load the cascade you want to apply (the xml file you have generated). ::detectMultiScale is used to fill a std::vector<cv::Rect> of detected object from current frame by sliding windows of different scales and sizes and merging high confident close samples. Code

Get object name of a class from the user in Java

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问题 I want the user to enter the name of the object to be used in the code. For example, if I have a class public class Person{ ....... } now instead of me creating an object with a specific name like Person student; I want the user to enter the name for the object maybe like teacher, and then an object teacher of the class person will be created. I do not know if this is even possible in java, many of the solutions I looked up were using a map, but the explanations were not clear enough for me

通过dbcc page来查看表中的数据

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--1.先建表 CREATE TABLE test(idd INT NOT NULL,name VARCHAR(10) NULL) INSERT INTO TEST SELECT 1,'abcdefg' UNION ALL SELECT 2,'hijklmn' --SELECT * FROM TEST SELECT * FROM sys.tables WHERE name = 'test' --2.查询元数据 --hobt_id : 72057594043236352 SELECT hobt_id FROM sys.partitions WHERE object_id = object_id('test') /* first_page ：0x790500000100 拆分成2部分:0100和79050000 这2部分要翻转,也就是0001 和 00000579 前面表示fileId,后面是pageId,都是16机制的表示方法, 通过calc计算器的转换,就是10进制就是1和1401 */ SELECT first_page --转换值的顺序 FROM sys.system_internals_allocation_units WHERE container_id = 72057594043236352 --3.这里创建一个表，用来存放dbcc page的结果 if exists

DynamicExpresso表达式求值

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DynamicExpresso 2.3.1 最低要求.net 4.6.1 github地址： https://github.com/davideicardi/DynamicExpresso 常用方法 /// <summary> /// 忽略大小写判断相等 /// </summary> /// <param name="str1"></param> /// <param name="str2"></param> /// <returns></returns> public static bool EqualsIgnorecase(object str1, object str2) { if (str1 == null && str2 == null) return true; if (str1 == null || str2 == null) { return false; } return string.Equals(str1.ToString(), str2.ToString(), StringComparison.OrdinalIgnoreCase); } /// <summary> /// str1 以 str2开头 /// </summary> /// <param name="str1"></param> /// <param name="str2"></param> /

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