For Spring Integration 4.2.x, the minimum compatible Java version is Java SE 6. Older versions of Java are not supported.

Spring Integration 4.2.x is also compatible with Java SE 7 as well as Java SE 8.

Certain features (such as Optional<?> payloads and CompletableFuture gateway method return types) require Java 8.

While the jars are compatible with Java 6, Java 8 is required to build the project. see Checking out and Building.

Spring Integration 4.2.x requires Spring Framework 4.2.0 or later.

The Spring Framework 2.0 introduced support for namespaces, which simplifies the Xml configuration of the application context, and consequently Spring Integration provides broad namespace support. This reference guide applies the following conventions for all code examples that use namespace support:

The int namespace prefix will be used for Spring Integration’s core namespace support. Each Spring Integration adapter type (module) will provide its own namespace, which is configured using the following convention:

int- followed by the name of the module, e.g. int-twitter, int-stream, …

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:int="http://www.springframework.org/schema/integration"
  xmlns:int-twitter="http://www.springframework.org/schema/integration/twitter"
  xmlns:int-stream="http://www.springframework.org/schema/integration/stream"
  xsi:schemaLocation="
   http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans.xsd
   http://www.springframework.org/schema/integration
   http://www.springframework.org/schema/integration/spring-integration.xsd
   http://www.springframework.org/schema/integration/twitter
   http://www.springframework.org/schema/integration/twitter/spring-integration-twitter.xsd
   http://www.springframework.org/schema/integration/stream
   http://www.springframework.org/schema/integration/stream/spring-integration-stream.xsd">
…
</beans>

For a detailed explanation regarding Spring Integration’s namespace support see Section F.2, “Namespace Support”.