52n-wps-client-lib
example
package: https://github.com/52North/WPS/tree/master/52n-wps-client-lib/src/main/java/org/n52/wps/client/example EchoProcessExample.java
demonstrates simple literal input and output and can also be useful for testing.
WPSClientExample.java
shows a more advanced client with complex inputs and outputs.