Code generation from XSD with JAXB and Maven

What you will learn in this small post

• How to create JAXB proxies at build time using maven-jaxb2-plugin in a continuous build environment (TeamCity / Bamboo)
• How to generate from an XSD file (XML-Schema-Definitions) #Java code.

Requirements

• We will use JAXB2 (see JSR 222 and JAXB 2.x).
• We use #Maven 2.2.1, the latest available version

Settings things up

The only difficulties is to add to your Maven proxy (Archiva, artifactory) the Maven repository of Sun. The example below use an inline repositories definition in pom.xml. So it work out of the box.

<repositories>
    <repository>
        <id>maven2-repository.dev.java.net</id>
        <name>Java.net Maven 2 Repository</name>
        <url>http://download.java.net/maven/2</url>
    </repository>
</repositories>

and the special Sun Maven plugin repository

<pluginRepositories>
    <pluginRepository>
        <id>maven2-repository.dev.java.net</id>
        <url>http://download.java.net/maven/2</url>
    </pluginRepository>
</pluginRepositories>

Here is how your pom should look like

<project>
    <modelVersion>
        4.0.0
    </modelVersion>
    <groupId>com.waltercedric.maven.examples</groupId>
    <artifactId>jaxb</artifactId>
    <version>
        0.1.0-SNAPSHOT
    </version>
    <packaging>jar</packaging>
    <name>jaxb</name>
    <build>
        <plugins>
            <plugin>
                <groupId>org.jvnet.jaxb2.maven2</groupId>
                <artifactId>maven-jaxb2-plugin</artifactId>
                <version>0.7.1</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>generate</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <dependencies>
        <dependency>
            <groupId>com.sun.xml.bind</groupId>
            <artifactId>jaxb-impl</artifactId>
            <version>2.1.12</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.7</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <repositories>
        <repository>
            <id>maven2-repository.dev.java.net</id>
            <name>Java.net Maven 2 Repository</name>
            <url>http://download.java.net/maven/2</url>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>maven2-repository.dev.java.net</id>
            <name>Java.net Maven 2 Repository</name>
            <url>http://download.java.net/maven/2</url>
        </pluginRepository>
    </pluginRepositories>
</project>

All you have to do now is to place your XSD shema in src/main/resources and run mvn package

The JAXB proxies will be created in target\generated-sources\xjc\generated so you can use them in src/main/java and src/test/java