Because of the error in the set of ClassPath, for example, in XXX / XX; BBB / BB; such a string, left a space behind; let my program always compile, and watch online When teaching articles, all according to the do, some paths are wrong, but how can people just learn ... I saw Axis's documentation in the evening, I found a mistake in the afternoon, in the open source The version of the world is too fast. Some articles have lost their guiding significance after the new version is released, and it seems to look at the documentation. After all, this is the most correct. To make a database client on a WTK, I chose Web Service to implement, and now I have to learn something. Now I don't understand 1, Java connected to the MySQL database, implement the database function under the web service 2, the handle of XML on the phone has taken a detachment of a week, I don't know when I can really enter Java's role. The idea is to use J2ME WTK <-> php <-> mysql, but found that I found a bad thread in the write program, so give up, but I think this idea is more meaningful, some less complex database operations There is PHP enough, and I can let PHP output I want the XML statement.