下載安裝包，並解壓，不做任何配置，爲local模式
執行example中的wordcount.jar 記得輸入參數和輸出參數
記得在flink目錄下面輸入命令，不然會報錯，找不到配置文件
Exception in thread "main" java.lang.RuntimeException: The configuration directory was not specified. Please specify the directory containing the configuration file through the 'FLINK_CONF_DIR' environment variable. at org.apache.flink.client.cli.CliFrontend.getConfigurationDirectoryFromEnv(CliFrontend.java:1160) at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:1109)
可以配置環境變量，記得配置flink配置文件的變量：FLINK_CONF_DIR
