How to integrate Spring, SpringMVC and MyBatis?

How to integrate Spring, SpringMVC and MyBatis? #javaruntimeenvironment #javaJDK #javascript #openjdk #JAVA #java64bit #javascriptdeveloper #javascriptprogramminglanguage #javascript30 #javavirtualmachine #ssm #SpringMVC #MyBatis #Spring

Table of Content 1. General framework 2. How does Spring integrates MyBatis 1. jar package 2. Configuration 3. Write code (1) entity (2) mapper (3) service (interface-oriented programming) (4) controller 4. How does Spring integrates SpringMVC 1. jar package 2. Configuration 3. index.jsp The End SSH –> Spring+SpringMVC+MyBatis SM integration –> SS integration –> SSM 1. General…

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MyBatis从插入语句中检索自动生成的ID

MyBatis是一个开源 Java 持久层框架，可以作为JDBC和Hibernate的替代品。它可以帮助我们减少代码并简化结果的检索，让我们专注于编写自定义 SQL 查询或存储过程。在本教程中，我们将学习如何使用 MyBatis 和 Spring Boot 插入数据时返回自动生成的 ID。依赖设置在开始之前，让我们在pom.xml中添加mybatis-spring-boot-starter依赖项：    org.mybatis.spring.boot     mybatis-spring-boot-startehttps://www.jdon.com/73892.html

JAVA作业代写服务，如何体现专业性

要体现JAVA作业代写服务（或Java代码编写服务）的专业性，可以考虑以下几个方面：

技术专业性：

技能和经验：服务提供者应该具备扎实的Java编程基础，包括对Java核心技术、数据结构、算法等的深入理解。

熟悉框架和库：服务提供者应熟悉Java主流的开发框架和库，如Spring Boot、Hibernate、MyBatis等，并能熟练应用。

工具和环境：使用专业的开发工具和环境，如IntelliJ IDEA、Eclipse等，以及版本控制工具如Git。

服务专业性：

沟通与理解：确保服务提供者能够充分理解客户的需求，并能够提供清晰的需求分析和设计文档。

时间与质量：按时交付高质量的代码，并确保代码符合客户的期望和要求。

反馈与修正：提供代码评审和反馈，帮助客户理解代码的工作原理，并根据反馈进行必要的修改和优化。

文档专业性：

清晰与完整：编写清晰、完整的文档，包括API文档、用户手册等，以便客户能够更好地理解和使用代码。

工具与格式：使用专业的文档生成工具，如Javadoc或Swagger，并保持统一的文档格式和风格。

安全性和性能：

安全性：确保代码中考虑到安全因素，如数据加密、用户身份验证和授权等。

性能优化：为客户提供关于代码性能的优化建议，提高应用的响应速度和资源利用率。

团队专业性：

资质与经验：服务提供者或团队成员应具备相关的技术资质或证书，以及丰富的Java开发经验。

持续学习：服务提供者应持续关注Java技术的发展趋势，并能够将这些新技术和方法应用到项目中。

价格与价值：合理的报价，确保服务的价值与价格相符。不提供“便宜无好货”的服务，也不漫天要价。

案例与证明：提供过去的Java项目案例或证明，展示服务提供者的能力和经验。

合同与协议：与客户签订明确的合同和协议，明确服务范围、时间、价格等细节，保护双方的权益。

售后与支持：提供持续的售后支持和服务，确保客户在使用过程中遇到问题能够得到及时解决。

其他附加价值：如提供代码审计、技术咨询、培训等服务，增加服务的附加价值。

总之，要体现Java作业代写服务（或Java代码编写服务）的专业性，需要从技术、服务、文档、安全性、团队、价格等多个方面进行综合考虑，确保为客户提供高质量、可靠的服务。

Free database design online softfactory

Today we will introduce a powerful software called Softfactory, an online database design software that utilizes artificial intelligence to improve efficiency. It can generate CRUD code and push it to development tools; It covers almost all languages, such as Java, Python, JavaScript, and supports team collaboration, real-time communication, and seamless collaboration. Finally, place the legitimate official website and experience the powerful combination of artificial intelligence and databases for a better understanding.

Let’s experience such a powerful software and see its true face!!!

The workbench is simple and comfortable, convenient and easy to use~

Core Function Demonstration

Construction project

To create a new project, database settings are required, such as database type, database character set, and database encoding. This determines the generation of DDL for tables, fields, indexes, and other data. Before designing a table, it is necessary to configure it to the database type you need, and multiple configuration conditions are available for you to choose from.

AI Table Creation

Click AI Create Table — In the pop-up dialog box, enter the requirements:

After saving — click “AI Table Creation” to execute the AI Table Creation task:

AI Table Creation Complete — After clicking Save, the table will appear in the corresponding group and can also be manually adjusted~

DDL

In softfactory, there are multiple ways to obtain the DDL of a table: DDL can be viewed in the preview window Click on any table and a preview window will appear on the right, where you can quickly view and copy DDL:

Can be viewed in the designer

Can perform table field, index, and foreign key operations in the designer

code

Code Settings

Softfactory software can generate CURD code based on the database structure, requiring knowledge of at least one language during generation, such as SpringBoot+Mybatis. Click Settings — Select the language in which the code needs to be generated in the pop-up dialog box:

If these cannot meet your needs, don’t worry, take a look. We can also customize language libraries, and the names of these languages will tell AI how to generate CRUD code.

Generate Code

Code can be generated in two locations: the preview window for the table and the table designer

Push Code

Softfactory software can push code to the local area through plugins, which requires connecting the device to Softfactory software in advance. We will not provide detailed instructions, and the operation instructions are visible within the software.

chart

In the graph interface, you can drag and drop a table into the graph to edit and delete fields.

Click on a field in the figure, and the field editing box will pop up on the right, allowing us to edit them:

Most importantly!!!

The relationship of a table can be represented by a line, which can be manually dragged or deleted.

You think this is over, no~ If two tables have a primary foreign key relationship, a connection will be automatically formed and cannot be deleted from the chart. If you need to delete it, you need to delete the foreign key in the Table Designer.

In the AI era, whoever can maximize their efficiency through AI is ahead of others, and programmers are no exception. Seeing this, do you think fried chicken is too greasy!!! Tell everyone secretly that there are many exciting features waiting for everyone to personally unlock them~

Finally, please attach the official website to avoid getting lost~ softfactory：https://www.softfactory.cloud/

JDK Java dynamic proxy and CGLIB are both Java-based frameworks for creating proxies for objects. The main difference between them is that JDK Java dynamic proxy requires that the target class implements an interface. It then creates a proxy instance by wrapping the target instance in its proxy class. This proxy class implements the same methods as the target class, but delegates call to the target instance. CGLIB, on the other hand, does not require that the target class implements an interface. Instead, it uses bytecode manipulation to create a subclass of the target class and then modifies the bytecode of the subclass to create proxies. This allows CGLIB to create proxies for classes that do not implement interfaces. This article, with practical examples, gives you a good understanding of these two approaches to implementing dynamic proxy in Java.

Application Performance Monitoring (APM) can be defined as the process of discovering, tracing, and performing diagnoses on cloud software applications in production. These tools enable better analysis of network topologies with improved metrics and user experiences. Pinpoint is an open-source Application Performance Management(APM) with trusted millions of users around the world. Pinpoint, inspired by Google Dapper is written in Java, PHP, and Python programming languages. This project was started in July 2012 and later released to the public in January 2015. Since then, it has served as the best solution to analyze the structure as well as the interconnection between components across distributed applications. Features of Pinpoint APM Offers Cloud and server Monitoring. Distributed transaction tracing to trace messages across distributed applications Overview of the application topology – traces transactions between all components to identify potentially problematic issues. Lightweight – has a minimal performance impact on the system. Provides code-level visibility to easily identify points of failure and bottlenecks Software as a Service. Offers the ability to add a new functionality without code modifications by using the bytecode instrumentation technique Automatically detection of the application topology that helps understand the configurations of an application Real-time monitoring – observe active threads in real-time. Horizontal scalability to support large-scale server group Transaction code-level visibility – response patterns and request counts. This guide aims to help you deploy Pinpoint APM (Application Performance Management) in Docker Containers. Pinpoint APM Supported Modules Below is a list of modules supported by Pinpoint APM (Application Performance Management): ActiveMQ, RabbitMQ, Kafka, RocketMQ Arcus, Memcached, Redis(Jedis, Lettuce), CASSANDRA, MongoDB, Hbase, Elasticsearch MySQL, Oracle, MSSQL(jtds), CUBRID, POSTGRESQL, MARIA Apache HTTP Client 3.x/4.x, JDK HttpConnector, GoogleHttpClient, OkHttpClient, NingAsyncHttpClient, Akka-http, Apache CXF JDK 7 and above Apache Tomcat 6/7/8/9, Jetty 8/9, JBoss EAP 6/7, Resin 4, Websphere 6/7/8, Vertx 3.3/3.4/3.5, Weblogic 10/11g/12c, Undertow Spring, Spring Boot (Embedded Tomcat, Jetty, Undertow), Spring asynchronous communication Thrift Client, Thrift Service, DUBBO PROVIDER, DUBBO CONSUMER, GRPC iBATIS, MyBatis log4j, Logback, log4j2 DBCP, DBCP2, HIKARICP, DRUID gson, Jackson, Json Lib, Fastjson Deploy Pinpoint APM (Application Performance Management) in Docker Containers Deploying the PInpoint APM docker container can be achieved using the below steps: Step 1 – Install Docker and Docker-Compose on Linux. Pinpoint APM requires a Docker version 18.02.0 and above. The latest available version of Docker can be installed with the aid of the guide below: How To Install Docker CE on Linux Systems Once installed, ensure that the service is started and enabled as below. sudo systemctl start docker && sudo systemctl enable docker Check the status of the service. $ systemctl status docker ● docker.service - Docker Application Container Engine Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled) Active: active (running) since Wed 2022-01-19 02:51:04 EST; 1min 4s ago Docs: https://docs.docker.com Main PID: 34147 (dockerd) Tasks: 8 Memory: 31.3M CGroup: /system.slice/docker.service └─34147 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock Verify the installed Docker version. $ docker version Client: Docker Engine - Community Version: 20.10.12 API version: 1.41 Go version: go1.16.12 Git commit: e91ed57 Built: Mon Dec 13 11:45:22 2021 OS/Arch: linux/amd64 Context: default Experimental: true

..... Now proceed and install Docker-compose using the dedicated guide below: How To Install Docker Compose on Linux Add your system user to the Docker group to be able to run docker commands without sudo sudo usermod -aG docker $USER newgrp docker Step 2 – Deploy the Pinpoint APM (Application Performance Management) The Pinpoint docker container can be deployed by pulling the official docker image as below. Ensure that git is installed on your system before you proceed. git clone https://github.com/naver/pinpoint-docker.git Once the image has been pulled, navigate into the directory. cd pinpoint-docker Now we will run the Pinpoint container that will have the following containers joined to the same network: The Pinpoint-Web Server Pinpoint-Agent Pinpoint-Collector Pinpoint-QuickStart(a sample application, 1.8.1+) Pinpoint-Mysql(to support certain feature) This may take several minutes to download all necessary images. Pinpoint-Flink(to support certain feature) Pinpoint-Hbase Pinpoint-Zookeeper All these components and their configurations are defined in the docker-compose YAML file that can be viewed below. cat docker-compose.yml Now start the container as below. docker-compose pull docker-compose up -d Sample output: ....... [+] Running 14/14 ⠿ Network pinpoint-docker_pinpoint Created 0.3s ⠿ Volume "pinpoint-docker_mysql_data" Created 0.0s ⠿ Volume "pinpoint-docker_data-volume" Created 0.0s ⠿ Container pinpoint-docker-zoo3-1 Started 3.7s ⠿ Container pinpoint-docker-zoo1-1 Started 3.0s ⠿ Container pinpoint-docker-zoo2-1 Started 3.4s ⠿ Container pinpoint-mysql Sta... 3.8s ⠿ Container pinpoint-flink-jobmanager Started 3.4s ⠿ Container pinpoint-hbase Sta... 4.0s ⠿ Container pinpoint-flink-taskmanager Started 5.4s ⠿ Container pinpoint-collector Started 6.5s ⠿ Container pinpoint-web Start... 5.6s ⠿ Container pinpoint-agent Sta... 7.9s ⠿ Container pinpoint-quickstart Started 9.1s Once the process is complete, check the status of the containers. $ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES cb17fe18e96d pinpointdocker/pinpoint-quickstart "catalina.sh run" 54 seconds ago Up 44 seconds 0.0.0.0:8000->8080/tcp, :::8000->8080/tcp pinpoint-quickstart 732e5d6c2e9b pinpointdocker/pinpoint-agent:2.3.3 "/usr/local/bin/conf…" 54 seconds ago Up 46 seconds pinpoint-agent 4ece1d8294f9 pinpointdocker/pinpoint-web:2.3.3 "sh /pinpoint/script…" 55 seconds ago Up 48 seconds 0.0.0.0:8079->8079/tcp, :::8079->8079/tcp, 0.0.0.0:9997->9997/tcp, :::9997->9997/tcp pinpoint-web 79f3bd0e9638 pinpointdocker/pinpoint-collector:2.3.3 "sh /pinpoint/script…" 55 seconds ago Up 47 seconds 0.0.0.0:9991-9996->9991-9996/tcp, :::9991-9996->9991-9996/tcp, 0.0.0.0:9995-9996->9995-9996/udp,

:::9995-9996->9995-9996/udp pinpoint-collector 4c4b5954a92f pinpointdocker/pinpoint-flink:2.3.3 "/docker-bin/docker-…" 55 seconds ago Up 49 seconds 6123/tcp, 0.0.0.0:6121-6122->6121-6122/tcp, :::6121-6122->6121-6122/tcp, 0.0.0.0:19994->19994/tcp, :::19994->19994/tcp, 8081/tcp pinpoint-flink-taskmanager 86ca75331b14 pinpointdocker/pinpoint-flink:2.3.3 "/docker-bin/docker-…" 55 seconds ago Up 51 seconds 6123/tcp, 0.0.0.0:8081->8081/tcp, :::8081->8081/tcp pinpoint-flink-jobmanager e88a13155ce8 pinpointdocker/pinpoint-hbase:2.3.3 "/bin/sh -c '/usr/lo…" 55 seconds ago Up 50 seconds 0.0.0.0:16010->16010/tcp, :::16010->16010/tcp, 0.0.0.0:16030->16030/tcp, :::16030->16030/tcp, 0.0.0.0:60000->60000/tcp, :::60000->60000/tcp, 0.0.0.0:60020->60020/tcp, :::60020->60020/tcp pinpoint-hbase 4a2b7dc72e95 zookeeper:3.4 "/docker-entrypoint.…" 56 seconds ago Up 52 seconds 2888/tcp, 3888/tcp, 0.0.0.0:49154->2181/tcp, :::49154->2181/tcp pinpoint-docker-zoo2-1 3ae74b297e0f zookeeper:3.4 "/docker-entrypoint.…" 56 seconds ago Up 52 seconds 2888/tcp, 3888/tcp, 0.0.0.0:49155->2181/tcp, :::49155->2181/tcp pinpoint-docker-zoo3-1 06a09c0e7760 zookeeper:3.4 "/docker-entrypoint.…" 56 seconds ago Up 52 seconds 2888/tcp, 3888/tcp, 0.0.0.0:49153->2181/tcp, :::49153->2181/tcp pinpoint-docker-zoo1-1 91464a430c48 pinpointdocker/pinpoint-mysql:2.3.3 "docker-entrypoint.s…" 56 seconds ago Up 52 seconds 0.0.0.0:3306->3306/tcp, :::3306->3306/tcp, 33060/tcp pinpoint-mysql Access the Pinpoint APM (Application Performance Management) Web UI The Pinpoint Web run on the default port 8079 and can be accessed using the URL http://IP_address:8079. You will be granted the below page. Select the desired application to analyze. For this case, we will analyze our deployed Quickapp. Select the application and proceed. Here, click on inspector to view the detailed metrics. Here select the app-in-docker You can also make settings to Pinpoint such as setting user groups, alarms, themes e.t.c. Under administration, you can view agent statistics for your application Manage your applications under the agent management tab To set an alarm, you first need to have a user group created. you also need to create a pinpoint user and add them to the user group as below. With the user group, an alarm for your application can be created, a rule and notification methods to the group members added as shown. Now you will have your alarm configured as below. You can also switch to the dark theme which appears as below. View the Apache Flink Task manager page using the URL http://IP_address:8081. Voila! We have triumphantly deployed Pinpoint APM (Application Performance Management) in Docker Containers. Now you can discover, trace, and perform diagnoses on your applications.

Senior Java Developer - 100% Remote

Senior Java Developer – 100% Remote

  Senior Java Developer Contract length: 10+ years Client Location – Dover, NH /Remote   Job Description 10+ years Experience in hands-on development in Java and Spring Framework Expert knowledge of design and development of web applications using Core Java (Collections, Multi-threading), Mybatis, JSP, Servlets, Struts, Spring Boot, Spring MVC, JMX, JPA, JAXB, JUnit, Jmeter testing Hands-on…

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Cyber Security Solutions:

Security solutions for networks, servers, and applications against potential external security threats, including viruses, worms, and hackers.

Network Security Services: It includes security features such as multi factor authentication, One time password and SSH File Transfer Protocol (SFTP)

Business Security Services: security solutions facilitates scalability with dedicated servers for fast performance and reliability, and a private cloud for ultimate control.

Mobile Enterprise Security Solutions: Mobile security services which prevent fraud protection capabilities for mobile devices.

IT Security Services: IT security services and use technologies such as MyBatis (iBATIS), SiteMinder SSO, Auth0, and Armor (Firehost)

JDBC的问题分析

自定义RPC框架

2022/03/06 校对完成

文章更新历史

2022/03/16 初稿。

原文地址：http://www.terwergreen.com/post/jdbc-de-wen-ti-fen-xi.html

核心实现

package test; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; /** * @author terwer * @Description * @create 2021-11-30 23:18 */ public class Main { public static void main(String[] args) { Connection connection = null; PreparedStatement preparedStatement = null; ResultSet resultSet = null; try { // 1、加载数据库驱动 Class.forName("com.mysql.jdbc.Driver"); // 2、获取数据库链接 connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/mybatis?characterEncoding=utf-8&useSSL=false", "root", "123456"); // 3、定义sql语句 String sql = "select * from user where username = ?"; // 4、获取预处理对象 preparedStatement = connection.prepareStatement(sql); // 5、设置参数 preparedStatement.setString(1, "hp"); // 6、拿到查询的数据库结果 resultSet = preparedStatement.executeQuery(); while (resultSet.next()) { int id = resultSet.getInt("id"); String username = resultSet.getString("username"); User user = new User(); user.setId(id); user.setUsername(username); System.out.println("user = " + user.toString()); } // JDBC问题分析 // 1、数据库链接信息等存在硬编码 解决：配置文件 // 2、频繁创建释放数据库链接 解决：连接池(c3p0、druid) // 查询过程问题分析 // 1、sql语句、参数、结果集存在硬编码 解决：配置文件 // 结果集问题分析 // 1、需要手动封装结果集 解决：反射进行对象映射、内省 } catch (Exception e) { e.printStackTrace(); } finally { System.out.println("释放资源"); } } }

1.1 问题分析

JDBC问题总结:

原始jdbc开发存在的问题如下:

1、 数据库连接创建、释放频繁造成系统资源浪费，从而影响系统性能。

2、 Sql语句在代码中硬编码，造成代码不易维护，实际应用中sql变化的可能较大，sql变动需要改变 java代码。

3、 使用preparedStatement向占有位符号传参数存在硬编码，因为sql语句的where条件不一定，可能 多也可能少，修改sql还要修改代码，系统不易维护。

4、 对结果集解析存在硬编码(查询列名)，sql变化导致解析代码变化，系统不易维护，如果能将数据库记录封装成 pojo对象解析比较方便

1.2 问题解决思路

1使用数据库连接池初始化连接资源

2将sql语句抽取到xml配置文件中

3使用反射、内省等底层技术，自动将实体与表进行属性与字段的自动映射

mysql驱动链接

https://files.cnblogs.com/files/tangyouwei/mysql-connector-java-5.1.49.jar.zip

源码

Gitee版

https://gitee.com/youweics/senior-java-engineer-road/blob/master/p7-skill/framework/mybatis/jdbc-simple/src/main/java/com/terwergreen/App.java

Github版

https://github.com/terwer/senior-java-engineer-road/blob/master/p7-skill/framework/mybatis/jdbc-simple/src/main/java/com/terwergreen/App.java

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.executor.ExecutorException: No constructor found in

Introduction of first-level cache and second-level cache of mybatis

Introduction of first-level cache and second-level cache of mybatis #javaruntimeenvironment #javaJDK #javascript #openjdk #JAVA #java64bit #javascriptdeveloper #javascriptprogramminglanguage #javascript30 #javavirtualmachine #ssm #SpringMVC #MyBatis #Spr

Table of Content 1. What is cache 1. Applicable to cache 2. Not suitable for caching 2. MyBatis first-level cache 1. Introduction to Level 1 Cache 2. When to clear the L1 cache 3. The first-level cache has no expiration time, only the life cycle 3. MyBatis secondary cache 1. Introduction to L2 Cache 2. When is the second level cache stored? 3. The second level cache has an expiration…

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1. Environment This tutorial is written using the following environment: Hardware: Mac Book Pro 17 “Notebook (2.6 Ghz Intel Core i7, 8 GB DDR3) Operating System: Mac OS X Snow Leopard 10.6.4 Spring 3.0.4 Maven 2.2.1 Eclipse 3.6 (Helios) with M2Eclipse and Spring IDE 2. Introduction Mybatis (formerly known as Ibatis) is a persistence tool …

JAVA代写服务，如何体现专业性

技术专业性：

掌握Java核心技术：如Java SE、Java EE、Java Web开发等。

熟悉常用的Java框架：如Spring、Hibernate、MyBatis等。

了解常用的设计模式和最佳实践。

熟悉数据库操作，如MySQL、Oracle等。

掌握Web前端技术，如HTML、CSS、JavaScript、jQuery等。

开发流程专业性：

使用版本控制工具，如Git。

遵循敏捷开发流程，确保开发的高效和灵活性。

编写清晰的代码和文档，并保持良好的代码风格。

测试驱动开发(TDD)，确保代码质量。

服务专业性：

与客户保持紧密沟通，确保充分理解需求。

提供专业的需求分析和设计文档。

根据项目复杂度进行合理的报价和时间预估。

提供后期的维护和升级服务。

文档专业性：

编写清晰的API文档和用户手册。

使用专业的文档工具，如Javadoc或Swagger。

安全性专业性：

考虑并实施适当的安全措施，如加密、身份验证和授权。

使用安全的编码实践，避免常见的安全漏洞。

团队专业性：

拥有经验丰富的Java开发团队。

团队成员持有相关证书，如Oracle Certified Professional等。

案例和经验：

提供过去的Java项目案例，证明能力和经验。

有与知名企业合作的经验。

持续学习与更新：关注Java的新技术、新框架和最佳实践，确保团队始终处于行业前沿。

响应及时：提供24/7的在线支持，确保客户在遇到问题时能得到及时帮助。

遵循标准与规范：遵循软件开发的标准和规范，如ISO 9001、CMMI等，确保服务的质量和可靠性。

适应性和灵活性：能快速适应客户的需求变化，灵活调整开发计划和方案。

使用专业的开发工具：使用专业的IDE（如IntelliJ IDEA或Eclipse）和项目管理工具（如Maven或Gradle），提高开发效率和代码质量。

保护知识产权：与客户签订保密协议，保护客户的商业机密和知识产权。

定期的培训和知识分享：组织内部培训和分享会，确保团队技能始终保持领先。

使用敏捷开发方法：采用敏捷开发方法，快速响应变化，确保项目的顺利进行。

持续集成与持续部署(CI/CD)：实现CI/CD流程，确保代码的质量和稳定性。

代码审查：进行代码审查，确保代码质量符合标准。

单元测试与集成测试：编写单元测试和集成测试，确保代码的稳定性和功能性。

MyBatis and Doma2: Dynamic SQL in Java Spring

Trước giờ làm với mấy chú Nhật hay sử dụng Doma2 trong Spring (hoặc seasar) để thao tác với Database. Thấy cái này cũng hay vì nó có viết được dynamic SQL (mà Doma2 gọi là 2WaySQL). Kiểu như if name != "" thì thêm điều kiện AND name like %name-truyền-vào%.

Nhìn thấy có vẻ đơn giản nhưng nếu không có cái dynamic SQL thì phải sử dụng IF hoặc CASE WHEN trong SQL làm giảm đáng kể performance, bởi index thì không nhận khi sử dụng điều kiện rẽ nhánh.

Nhược điểm của Doma2 là cộng đồng nhỏ quá, 1 phần vì nó là hàng Nhật, 1 phần vì cũng lâu đời rồi nên chẳng thấy ai dùng (ngoài Nhật và công ty outsource cho Nhật).

Mới đây mò ra cái MyBatis cũng làm được trò này mà cộng đồng to hơn Doma2 nhiều. https://mybatis.org/mybatis-dynamic-sql/docs/spring.html

A tip on using user transaction on Mybatis

A tip on using user transaction on Mybatis

When using transation on Mybatis, there are 3 ways.

Container managed transaction – JEE engine manages transaction

User managed transaction – transaction is controlled by user source code

Spring managed transaction – transaction is controlled by Spring Transaction policy

I usually use Spring managed or container managed transaction. But sometimes, I need to control transaction in source code. For…

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Java is mostly every app developers favorite object-oriented language for lots of motives. One of the many reasons to go for Java is that it offers a host of other Java web development frameworks consisting of MyBatis a persistence framework a gaming framework. A Java framework is unique to the Java programming language which is used for web developers Java software development company and programs.

1. Struts

In a traditional servlet JSP approach, if a user submits, say, a form with their details, the data then is going to a servlet for processing, or the control goes over to the next JSP.  The controller is an ActionServlet where models can be written for the view and user registrations are managed using the JavaBean ActionForm. The Action object is responsible for transmitting the web development flow.

2. Java Server Faces

It is the Java-based web app developers framework mainly used for Java web app developers near me. JSF is maintained by Oracle technology that especially simplifies creating person interfaces for Java app developers. The web development framework simplifies the development of user interfaces for server-facet applications by assembling reusable user interface components on a single page. The framework simplifies the web development of user interfaces for server-facet applications by assembling reusable user interface components on a single page. JSF is a thing-based MVC framework that encompasses several front-end technologies and focuses more on the presentation layer.

3. Apache Hadoop

Apache Hadoop is not a full-stack framework, it offers a software developers framework and works at the MapReduce programming version. Hadoop helps in distributed data storage and processing the usage of the master-slave design pattern. The Hadoop HDFS layer of the master node has the records node. The MapReduce layer has the JobTracker and the task tracker. The slave nodes have the Data node and the task tracker respectively.

4. Grails

Grails is clean to learn full-stack framework much suitable for those who are just beginning their programming career. Although Grails is a web development framework written in the Groovy programming language, it runs on the Java platform and is fully compatible with the Java syntax. It is easy to learn and is one of the most beginner-friendly Java frameworks. Grails is written in Groovy and it can run on the Java platform.

5. Dropwizard

This is a lightweight Java framework that provides advanced help for complex setups and lets you complete your app developers in the fastest way possible Any novice programmer can broaden high-performance RESTful  web development apps without problems with the Dropwizard Java framework. Flutter developers are able to set up faster due to less sophistication and the abundance of gear to make app developers.

6. Vaadin

Vaadin is a lightweight Java framework, which allows developers to create complete Java app developers and interfaces for laptops and mobile app developers. Vaadin is a cross-platform web development JavaScript framework that lets you bundle native mobile app developers, web apps, or even laptop app developers with a single codebase. Vaadin’s cross-platform portability allows users to expand network infrastructures quickly and hassle-free. Provides a platform for simplified Java development. Data visualization is another aspect of Vaadin that contributes to the success of your app developers.

7. Micronaut

Micronaut is leading the serverless app developers. Micronaut is a contemporary JVM-based, full-stack framework for software developers modular, readily tested microservice and serverless programs.  Micronaut is a Polyglot framework, which means it can be used to create programs in a wide range of programming languages. Micronaut is not only a coding web framework however it’s also a performance booster. It also resolved all complex browser-based utility challenges and with its rich libraries offers faster working java web development companies applications.

Conclusion

To develop amazing multi-featured web development, you can choose any of the Java frameworks for web development mentioned above. The proper Java framework not only will support you in meeting your unique business requirements but also give you a special level of flexibility with high performance and security.