Home Java javaTutorial Database operation skills in Java language

Database operation skills in Java language

Jun 11, 2023 pm 09:06 PM
java database Skill

Database operation skills in Java language

As a language widely used in enterprise-level development, database operations in Java language are an essential part. Databases are used in Java development to provide data storage and management for applications, and a large number of data queries and data operations require efficient skills to operate the database. This article will introduce some tips and best practices for database operations in the Java language.

  1. Use PreparedStatement to execute SQL statements

In the Java language, in order to avoid SQL injection attacks, PreparedStatement is the best way to execute SQL statements. Its use is very simple, just use the ? sign, and then bind the actual parameters to the corresponding positions. The biggest benefit of PreparedStatement is that it pre-compiles SQL statements, improves the execution speed of SQL, and can also batch process SQL statements.

  1. Use connection pool to speed up database connection

Database connection is an expensive operation in Java language. The reason is that the database connection process includes several steps, such as establishing connection, authentication, selecting database, etc. The connection pool creates and initializes N database connections in advance, and then directly obtains the available connections from the pool when needed, and then returns them to the connection pool after use. This can not only avoid frequent creation and destruction of connections, but also avoid the impact on database resource usage. There are many implementations of connection pools, such as C3P0, HikariCP, Tomcat JDBC, etc.

  1. Database paging technology

The LIMIT keyword is generally used in Java to implement the paging function. For example, SELECT * FROM user limit 0,20. This statement queries the first 20 records from the user table. The LIMIT statement usually contains 2 parameters: the starting index and the number of records to be queried. LIMIT paging can reduce the database's burden of reading data from the hard disk and improve query efficiency.

  1. Close ResultSet and Statement objects

The closing of ResultSet is often ignored, but similar to Statement and PreparedStatement, ResultSet needs to be closed manually, because the memory occupied by ResultSet will follow the result set. increase in size. In order to avoid memory leaks, it is very important to close the ResultSet and Statement objects.

  1. Use caching to speed up data access

In actual development, data access is often more frequent, and each access to the database will cause a certain overhead. In order to improve the efficiency of data access, caching technology can be used. Caching can cache data into memory so that the next time it is accessed, the data can be fetched directly from the cache without querying the database again. Some popular Java caching frameworks such as Ehcache, Java Caching System (JCS), and Hazelcast can help you achieve this.

In short, efficient database operations are very important for Java development. We need to focus on how to reduce the time-consuming database operations and improve the reusability and maintainability of the code. If you continue to focus on the above tips and best practices, you will be able to better manage databases in Java development.

The above is the detailed content of Database operation skills in Java language. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Square Root in Java Square Root in Java Aug 30, 2024 pm 04:26 PM

Guide to Square Root in Java. Here we discuss how Square Root works in Java with example and its code implementation respectively.

Perfect Number in Java Perfect Number in Java Aug 30, 2024 pm 04:28 PM

Guide to Perfect Number in Java. Here we discuss the Definition, How to check Perfect number in Java?, examples with code implementation.

Random Number Generator in Java Random Number Generator in Java Aug 30, 2024 pm 04:27 PM

Guide to Random Number Generator in Java. Here we discuss Functions in Java with examples and two different Generators with ther examples.

Weka in Java Weka in Java Aug 30, 2024 pm 04:28 PM

Guide to Weka in Java. Here we discuss the Introduction, how to use weka java, the type of platform, and advantages with examples.

Armstrong Number in Java Armstrong Number in Java Aug 30, 2024 pm 04:26 PM

Guide to the Armstrong Number in Java. Here we discuss an introduction to Armstrong's number in java along with some of the code.

Smith Number in Java Smith Number in Java Aug 30, 2024 pm 04:28 PM

Guide to Smith Number in Java. Here we discuss the Definition, How to check smith number in Java? example with code implementation.

Java Spring Interview Questions Java Spring Interview Questions Aug 30, 2024 pm 04:29 PM

In this article, we have kept the most asked Java Spring Interview Questions with their detailed answers. So that you can crack the interview.

Break or return from Java 8 stream forEach? Break or return from Java 8 stream forEach? Feb 07, 2025 pm 12:09 PM

Java 8 introduces the Stream API, providing a powerful and expressive way to process data collections. However, a common question when using Stream is: How to break or return from a forEach operation? Traditional loops allow for early interruption or return, but Stream's forEach method does not directly support this method. This article will explain the reasons and explore alternative methods for implementing premature termination in Stream processing systems. Further reading: Java Stream API improvements Understand Stream forEach The forEach method is a terminal operation that performs one operation on each element in the Stream. Its design intention is

See all articles