spidermanzy的专栏

在tomcat的context.xml中配置了jndi数据源，启动时报错：Could not get JDBC Connection; nested exception is org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot load JDBC driver class 'oracle.jdbc.driver.OracleDriver...

 【解决办法是】：将Ant控制台编码格式改为UTF-8. 1.右键build.xml  --> Run As --> External Tools...2.打开Common tab页3.在其中的Console Encoding中选择UTF-8...

eclipse中Errors running builder JavaScript Validator的问题：Errors occurred during the build.Errors running builder 'JavaScript Validator' on project XXXX.java.lang.NullPointerException.要解决这个问题，要就把J...

怎么使float保留两位小数或多位小数 两种方法：import java.math.*; …… 方法1： float f = 34.232323; BigDecimal b = new BigDecimal(f); float f1 = b.setScale(2, BigDecimal.ROUND_HALF_UP).floatValue(); // b.setScale(2, BigDe...