tomcat一直报java.sql.SQLException: Network error IOException异常，怎么解决啊？ Tomcat启动报错,java.sql.sqlexcepti...
java.sql.SQLException: Network error IOException: Connection refused: connect1\u3001\u770b\u770b\u8bbf\u95ee\u8d26\u53f7\u548c\u5bc6\u7801\u5bf9\u4e0d\u5bf9\uff1f
2\u3001\u770b\u770b\u4f60\u8fd9\u4e2a\u8d26\u53f7\u662f\u5426\u5177\u6709\u8bbf\u95ee\u6570\u636e\u5e93\u7684\u6743\u9650\uff1f
3\u3001\u770b\u770b\u670d\u52a1\u6709\u6ca1\u5f00\u542f\uff1f
4\u3001\u770b\u770b\u9a71\u52a8\u7248\u672c\u5bf9\u4e0d\u5bf9\u4e0a\uff1f
5\u3001\u7b49\u7b49\uff01
\u4f60\u8981\u628a\u201cjava.sql.SQLException\uff1a\u201d\u540e\u9762\u7684\u5177\u4f53\u539f\u56e0\u8d34\u51fa\u6765\u554a\uff0cSQLException\u662f\u629b\u51fa\u5173\u4e8e\u6570\u636e\u5e93\u64cd\u4f5c\u65b9\u9762\u7684\u5f02\u5e38\uff0c\u5177\u4f53\u54ea\u91cc\u5f02\u5e38\u4f60\u8fd8\u8981\u4ed4\u7ec6\u770b\u770b\u540e\u9762\u7684\u5f02\u5e38\u4fe1\u606f\uff0c\u5b83\u4f1a\u544a\u8bc9\u4f60\u662f\u54ea\u4e2a\u6587\u4ef6\u54ea\u884c\u51fa\u7684\u9519\u8bef\uff01
先确保你的数据库能正常进入，可以用pl/sql试。然后如果是oracle的话就需要修改连接数了，具体方法如下：a、以sysdba身份登陆PL/SQL
b、查询目前连接数
show parameter processes;
c、更改系统连接数
alter system set processes=1000 scope=spfile;
d、创建pfile
create pfile from spfile;
e、重启Oracle服务或重启Oracle服务器
缓冲池空间不足，超过最大连接数
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