jackson 转换xml
之前在网上看到jackson可以转成xml但一直也没有测试成功，今天测试通过了，测试代码如下（网上直接拿过来的）：
XmlMapper<Account xmlns=""><id>1</id><name>haha</name><email>11@qq.com</email><address>CHINA-BJ</address><birthday/></Account><ArrayList xmlns=""><id>1</id><name>haha</name><email>11@qq.com</email><address>CHINA-BJ</address><birthday/></ArrayList><ArrayList><id>1</id><name>haha</name><email>11@qq.com</email><address>CHINA-BJ</address><birthday/></ArrayList><HashMap xmlns=""><A><id>1</id><name>haha</name><email>11@qq.com</email><address>CHINA-BJ</address><birthday/></A><B><id>1</id><name>haha</name><email>11@qq.com</email><address>CHINA-BJ</address><birthday/></B></HashMap>
