json- rpc and DWR is similar to the ajax- rpc achieve. I am more details, because he was very simple, but only rpc. If you want to realize their own specific rpc, then he can take a look.

json-rpc-java-1.0
.................\build.xml
.................\jsonrpc-1.0.jar
.................\jsonrpc-1.0.war
.................\src
.................\...\com
.................\...\...\metaparadigm
.................\...\...\............\jsonrpc
.................\...\...\............\.......\AbstractSerializer.java
.................\...\...\............\.......\ArraySerializer.java
.................\...\...\............\.......\BeanSerializer.java
.................\...\...\............\.......\BooleanSerializer.java
.................\...\...\............\.......\DateSerializer.java
.................\...\...\............\.......\DictionarySerializer.java
.................\...\...\............\.......\ErrorInvocationCallback.java
.................\...\...\............\.......\HttpServletRequestArgResolver.java
.................\...\...\............\.......\HttpSessionArgResolver.java
.................\...\...\............\.......\InvocationCallback.java
.................\...\...\............\.......\JSONRPCBridge.java
.................\...\...\............\.......\JSONRPCBridgeServletArgResolver.java
.................\...\...\............\.......\JSONRPCResult.java
.................\...\...\............\.......\JSONRPCServlet.java
.................\...\...\............\.......\JSONSerializer.java
.................\...\...\............\.......\ListSerializer.java
.................\...\...\............\.......\LocalArgResolveException.java
.................\...\...\............\.......\LocalArgResolver.java
.................\...\...\............\.......\MapSerializer.java
.................\...\...\............\.......\MarshallException.java
.................\...\...\............\.......\NumberSerializer.java
.................\...\...\............\.......\ObjectMatch.java
.................\...\...\............\.......\package.html
.................\...\...\............\.......\PrimitiveSerializer.java
.................\...\...\............\.......\ReferenceSerializer.java
.................\...\...\............\.......\Serializer.java
.................\...\...\............\.......\SerializerState.java
.................\...\...\............\.......\SetSerializer.java
.................\...\...\............\.......\StringSerializer.java
.................\...\...\............\.......\UnmarshallException.java
.................\...\org
.................\...\...\json
.................\...\...\....\JSONArray.java
.................\...\...\....\JSONObject.java
.................\...\...\....\JSONTokener.java
.................\...\...\....\package.html
.................\test
.................\....\rsrc
.................\....\....\unicode
.................\....\....\.......\00index.properties
.................\....\....\.......\japanese.utf-8.txt
.................\....\....\.......\simplified-chinese.utf-8.txt
.................\....\src
.................\....\...\com
.................\....\...\...\metaparadigm
.................\....\...\...\............\dict
.................\....\...\...\............\....\Database.java
.................\....\...\...\............\....\Definition.java
.................\....\...\...\............\....\DictClient.java
.................\....\...\...\............\....\DictClientException.java
.................\....\...\...\............\....\DictCommandResult.java
.................\....\...\...\............\....\Match.java
.................\....\...\...\............\....\Strategy.java
.................\....\...\...\............\jsonrpc
.................\....\...\...\............\.......\test
.................\....\...\...\............\.......\....\BeanA.java
.................\....\...\...\............\.......\....\BeanB.java
.................\....\...\...\............\.......\....\Browser.java
.................\....\...\...\............\.......\....\Hello.java
.................\....\...\...\............\.......\....\Test.java
.................\....\...\...\............\.......\....\Unicode.java
.................\webapps
.................\.......\jsonrpc
.................\.......\.......\browser.js
............

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