mirror of
https://github.com/querydsl/querydsl.git
synced 2026-06-21 21:14:12 +08:00
78 lines
2.2 KiB
Markdown
78 lines
2.2 KiB
Markdown
## Querydsl SQL
|
|
|
|
The SQL module provides integration with the JDBC API.
|
|
|
|
**Maven integration**
|
|
|
|
Add the following dependencies to your Maven project :
|
|
|
|
```XML
|
|
<dependency>
|
|
<groupId>com.querydsl</groupId>
|
|
<artifactId>querydsl-sql</artifactId>
|
|
<version>${querydsl.version}</version>
|
|
</dependency>
|
|
<dependency>
|
|
<groupId>org.slf4j</groupId>
|
|
<artifactId>slf4j-log4j12</artifactId>
|
|
<version>1.6.1</version>
|
|
</dependency>
|
|
```
|
|
|
|
**Code generation via Maven**
|
|
|
|
This functionality is also available as a Maven plugin. The presented example can be declared like this in the POM :
|
|
|
|
```XML
|
|
<project>
|
|
<build>
|
|
<plugins>
|
|
...
|
|
<plugin>
|
|
<groupId>com.querydsl</groupId>
|
|
<artifactId>querydsl-maven-plugin</artifactId>
|
|
<version>${querydsl.version}</version>
|
|
<executions>
|
|
<execution>
|
|
<goals>
|
|
<goal>export</goal>
|
|
</goals>
|
|
</execution>
|
|
</executions>
|
|
<configuration>
|
|
<jdbcDriver>org.apache.derby.jdbc.EmbeddedDriver</jdbcDriver>
|
|
<jdbcUrl>jdbc:derby:target/demoDB;create=true</jdbcUrl>
|
|
<packageName>com.myproject.domain</packageName>
|
|
<targetFolder>${project.basedir}/target/generated-sources/java</targetFolder>
|
|
</configuration>
|
|
<dependencies>
|
|
<dependency>
|
|
<groupId>org.apache.derby</groupId>
|
|
<artifactId>derby</artifactId>
|
|
<version>${derby.version}</version>
|
|
</dependency>
|
|
</dependencies>
|
|
</plugin>
|
|
...
|
|
</plugins>
|
|
</build>
|
|
</project>
|
|
```
|
|
|
|
Use the goal test-export to add the targetFolder as a test compile source root instead of a compile source root.
|
|
|
|
**Querying**
|
|
|
|
Querying with Querydsl SQL is as simple as this :
|
|
|
|
```JAVA
|
|
QCustomer customer = new QCustomer("c");
|
|
|
|
SQLTemplates dialect = new HSQLDBTemplates(); // SQL-dialect
|
|
SQLQuery query = new SQLQuery(connection, dialect);
|
|
List<String> lastNames = query.from(customer)
|
|
.where(customer.firstName.eq("Bob"))
|
|
.list(customer.lastName);
|
|
```
|
|
For more information on the Querydsl SQL module visit the reference documentation http://www.querydsl.com/static/querydsl/latest/reference/html/ch02s03.html
|