postgresql数据库无法连接，提示 Is the server
running on host "localhost" (127.0.0.1) and accepting TCP/IP connections on port 5432? could not connect to server: Connection refused (0x0000274D/10061) Is the server running on host "localhost" (127.0.0.1) and accepting TCP/IP connections on port 5432?
答：服务 - 点击PostgreSQL database server
8.3 - 点击第二个选项卡“登录” - 选择第一行“本地系统帐户”。