Function description This is a tool method that does the following. (1) Quickly generate getter and setter methods of entity classes; (2) Add comments to the class. Hovering the mouse on the class name after new can prompt the description of the corresponding class in the code assistant; (3) Add comments to the getter and […]
Tag: setter
Reading database of Spring Batch – custom PreparedStatementSetter of JdbcCursorItemReader (38)
1. Custom PreparedStatementSetter Refer to my other blog for details: Spring Batch reading database – JdbcCursorItemReader (35) – Programmer Sought 2. Project example 1. Project example 2. Code implementation BatchMain.java: package com.xj.demo29; import org.springframework.batch.core.Job; import org.springframework.batch.core.JobExecution; import org.springframework.batch.core.JobParametersBuilder; import org.springframework.batch.core.launch.JobLauncher; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; /** * @Author : xjfu * @Date : 2021/10/26 20:01 * […]
IDEA must install plug-ins: Lombok, GenerateAllSetter
Lombok eliminates redundant code of entity classes through annotations GenerateAllSetter quickly generates the set method of the entity Lombok In previous Java projects, there were too many unfriendly codes: POJO getter/setter/toString/construction methods; Printing logs; closing operations of I/O streams, etc., these codes have no technical content, but also affect the beauty of the code, Lombok […]
TypeScript: Permission Modifiers, Getters and Setters, Parameter Properties, Index Signatures, Static Members
Access Modifier Access modifiers can specify the scope in which attributes and methods in a class can be used. Modifier Description public Class attributes and class methods modified by public keywords can be used anywhere (current class, subclass, instance) private by private Keyword modified class attributes and class methods can only be used in the […]
The problem of using the pit of the Lombok Setter-Getter method and the @Accessor (chain = true) annotation
1. The pit of the Setter-Getter method problem discovery We mainly use the annotation of Lombok’s Setter-Getter method in the project, that is, the combined annotation @Data, but in the process of using Mybatis to insert data, a problem occurred. The problem is described as follows When we used Mybatis to insert data, we found […]
Spring three injection methods, construction, Setter and field injection. Defects based on field injection: final modification, covering up a single responsibility, tight coupling with IOC, hidden dependencies, and no security check
Original: https://mp.weixin.qq.com/s/H2VWEhtpRuIqCDvrYnIjcA @Autowire and @Resource annotations Use the correct posture, don’t use the wrong one again! ! Field-based dependency injection warning When I used Idea to write code today, I saw a warning message displayed in the previous project. I checked it and found the following code? @Autowire private JdbcTemplate jdbcTemplate; Prompted warning message Field […]
Spring: The way of dependency injection (setter injection, constructor injection, automatic assembly, collection injection)
Dependency injection methods include setter injection, constructor injection, automatic assembly, collection injection First, the Maven project pom.xml depends on the package as follows: pom.xml <?xml version=”1.0″ encoding=”UTF-8″?> <project xmlns=”http://maven.apache.org/POM/4.0.0″ xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance” xsi:schemaLocation=”http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd”> <modelVersion>4.0.0</modelVersion> <groupId>org.example</groupId> <artifactId>spring-1</artifactId> <version>1.0-SNAPSHOT</version> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>5.2.22.RELEASE</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.16</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.6</version> </dependency> <dependency> <groupId>c3p0</groupId> <artifactId>c3p0</artifactId> […]
[Spring] Three major dependency injections (@Autowired, Setter, construction method)
Directory 1. Property injection (@Autowired) 1.1 Advantage Analysis 1.2 Shortcoming Analysis 1.2.1 Unable to implement final modified variable injection. 1.2.2 Poor compatibility 1.2.3 (Possibly Violating) Design Principle Issues 1.2.4 Code example: 1.2.5 What should I do if there is a circular dependency? 1.2.6 The difference between @Resource and @Autowired 2. Setter injection 2.1 Advantage Analysis […]
Insert data in batches using BatchPreparedStatementSetter of JdbcTemplate
Records: 397 Scenario: Use JdbcTemplate to find data in batches from one database and store them in List, and write the result data in batches to another database. Version: JDK 1.8, SpringBoot 2.6.3 Key class 01: org.springframework.jdbc.core.JdbcTemplate Key class 02: org.springframework.jdbc.core.BatchPreparedStatementSetter 1. Batch query and batch write public static void main(String[] args) { // 1. […]
Object.assign in JavaScript with Getters, Setters and definePropert
This article introduces the Object.assign, Getter, Setters, and definePropert methods for manipulating element objects in JavaScript. Through the understanding of these concepts, it can help everyone better understand how we use these concepts in project development in JavaScript. These basic concepts are also must-know knowledge points in modern JavaScript development, and mastering them is of […]