DZone
Thanks for visiting DZone today,
Edit Profile
  • Manage Email Subscriptions
  • How to Post to DZone
  • Article Submission Guidelines
Sign Out View Profile
  • Post an Article
  • Manage My Drafts
Over 2 million developers have joined DZone.
Log In / Join
Refcards Trend Reports
Events Video Library
Over 2 million developers have joined DZone. Join Today! Thanks for visiting DZone today,
Edit Profile Manage Email Subscriptions Moderation Admin Console How to Post to DZone Article Submission Guidelines
View Profile
Sign Out
Refcards
Trend Reports
Events
View Events Video Library
Zones
Culture and Methodologies Agile Career Development Methodologies Team Management
Data Engineering AI/ML Big Data Data Databases IoT
Software Design and Architecture Cloud Architecture Containers Integration Microservices Performance Security
Coding Frameworks Java JavaScript Languages Tools
Testing, Deployment, and Maintenance Deployment DevOps and CI/CD Maintenance Monitoring and Observability Testing, Tools, and Frameworks
Culture and Methodologies
Agile Career Development Methodologies Team Management
Data Engineering
AI/ML Big Data Data Databases IoT
Software Design and Architecture
Cloud Architecture Containers Integration Microservices Performance Security
Coding
Frameworks Java JavaScript Languages Tools
Testing, Deployment, and Maintenance
Deployment DevOps and CI/CD Maintenance Monitoring and Observability Testing, Tools, and Frameworks

Integrating PostgreSQL Databases with ANF: Join this workshop to learn how to create a PostgreSQL server using Instaclustr’s managed service

Mobile Database Essentials: Assess data needs, storage requirements, and more when leveraging databases for cloud and edge applications.

Monitoring and Observability for LLMs: Datadog and Google Cloud discuss how to achieve optimal AI model performance.

Automated Testing: The latest on architecture, TDD, and the benefits of AI and low-code tools.

Related

  • How To Approach Java, Databases, and SQL [Video]
  • Java EE 6 Pet Catalog with GlassFish and MySQL
  • How to LINQ Between Java and SQL With JPAStreamer
  • Express Hibernate Queries as Type-Safe Java Streams

Trending

  • Parallelism in ConcurrentHashMap
  • Effective Tips for Debugging Complex Code in Java
  • AI for Web Devs: Project Introduction and Setup
  • 5 Web3 Trends to Follow in 2023
  1. DZone
  2. Coding
  3. Languages
  4. How to Store and Manage SQL Statements More Effectively With Java

How to Store and Manage SQL Statements More Effectively With Java

Struggling with managing SQL statements in your Java code? Let Zemian give you away out!

Zemian Deng user avatar by
Zemian Deng
·
Jul. 28, 15 · Tutorial
Like (0)
Save
Tweet
Share
18.30K Views

Join the DZone community and get the full member experience.

Join For Free

NOTE: use java.util.Properties#loadFromXML is easier!


If you work with plain Java JDBC without any external libraries, you will need to manage your own SQL statements. Unfortunately Java String does not support muti-lines construct, and you have to use many "quotes" + "concatenation" and makes the SQL very hard to read and manage. This makes it hard to maintain and test (try to copy a SQL from Java code into your SQL client). It would be so nice to keep the entire SQL block of text intact without these Java noise.


Here is a quick solution. Store your SQL queries in XML inside CDATA:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<sqlMap>
    <sqls>
        <entry>
            <key>getUser</key>
            <value><![CDATA[
SELECT *
FROM USERS
WHERE ID = ?
            ]]></value>
        </entry>
        <entry>
            <key>getSpecialCodeByUserId</key>
            <value><![CDATA[
SELECT u.EMAIL, p.ID as PROFILEID, p.SPECIALCODE, a.MANAGERID
FROM USERS u
  LEFT JOIN PROFILE p ON p.USERID = u.ID
  LEFT JOIN ACCOUNT a ON a.PROFILEID = p.ID
WHERE u.ID = ?  ]]></value>
        </entry>  </sqls>
</sqlMap>


Now you just need to read it. You can do this quickly with built-in JAXB

import javax.xml.bind.annotation.XmlRootElement;
import java.util.HashMap;
import java.util.Map;

@XmlRootElement
public class SqlMap {
    Map<String, String> sqls = new HashMap<>();

    public Map<String, String> getSqls() {
        return sqls;
    }

    public void setSqls(Map<String, String> sqls) {
        this.sqls = sqls;
    }

    public String getSql(String name) {
        return sqls.get(name);
    }

    public static SqlMap load(String name) throws Exception {
        String xml = Utils.loadString(name);
        SqlMap sqlMap = unmarshallXML(xml );
        return sqlMap;
    }
}




sql Java (programming language)

Opinions expressed by DZone contributors are their own.

Related

  • How To Approach Java, Databases, and SQL [Video]
  • Java EE 6 Pet Catalog with GlassFish and MySQL
  • How to LINQ Between Java and SQL With JPAStreamer
  • Express Hibernate Queries as Type-Safe Java Streams

Comments

Partner Resources

X

ABOUT US

  • About DZone
  • Send feedback
  • Careers
  • Sitemap

ADVERTISE

  • Advertise with DZone

CONTRIBUTE ON DZONE

  • Article Submission Guidelines
  • Become a Contributor
  • Visit the Writers' Zone

LEGAL

  • Terms of Service
  • Privacy Policy

CONTACT US

  • 3343 Perimeter Hill Drive
  • Suite 100
  • Nashville, TN 37211
  • support@dzone.com

Let's be friends: