在使用truffle migrate进行智能合约test环境发布时如果未配置正确会出现以下异常：
$ truffle migrate Error: No network specified. Cannot determine current network. at Object.detect (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:43157:23) at /usr/local/lib/node_modules/truffle/build/cli.bundled.js:200497:19 at finished (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:43085:9) at /usr/local/lib/node_modules/truffle/build/cli.bundled.js:198408:14 at /usr/local/lib/node_modules/truffle/build/cli.bundled.js:68162:7 at /usr/local/lib/node_modules/truffle/build/cli.bundled.js:163793:9 at /usr/local/lib/node_modules/truffle/build/cli.bundled.js:160353:16 at replenish (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:160873:25) at iterateeCallback (/usr/local/lib/node_modules/truffle/build/cli.bundled.js:160863:17) at /usr/local/lib/node_modules/truffle/build/cli.bundled.js:160838:16
导致上面异常的原因为是因为truffle.js里面未配置链接合约发布的环境地址，找到对应的truffle.js文件，修改代码为类似如下配置即可解决问题：
module.exports = { networks: { development: { host: "localhost", port: 8545, network_id: "*" // 匹配任何network id } } };
