How to modify the application to implement the separation of write/read

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Hi all, 
 
I want to test the mode of Master/Slave for mysql.
Also I want to separate the write and read of sql requests, that is, I want to make Slave server of mysql to handle read requests and make Master server to handle write requests.
 
I want to know how to modify the code of my application. Some people suggest me to use mysql-proxy to access mysql server.
I checked the version of mysql-proxy, I found the latest version is just 0.8.0.
Does someone have met this problem? How to implement the separation of read and write? 
Please give me some advice.
I use java with the Connector/L jdbc driver, I checked the webpage of http://dev.mysql.com/doc/refman/5.1/en/connector-j-reference-replication-connection.html, it suggests to use "ReplicationDriver" to replace common driver.
I use Hibernate to access Mysql, the connection poll is c3p0-0.9.0, can I just need to modify the configuration of JDBC URL, like "jdbc:mysql:replication://master,slave1,slave2,slave3/test" to implement the separation of write/read? 
After configuring JDBC URL like this, can I make the query SQL requests to access the Slave server, the update/insert/delete SQL requests to access the Master server, and if the Master server is shotdown, the driver will failover to the Slave server?
I am not sure whether do I need to modify something else? Like my application code.
Expect your reply.
Thanks,
Peter
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