rename dev to backend

backend/et-flink_代码走查.md

@@ -0,0 +1,87 @@
+et-flink 代码走查
+
+1. 流、连接等资源最好是添加异常捕捉，资源使用完成后关闭：
+
+```
+comm_utils/src/main/java/comm/utils/storage/HdfsHelper.java  				L98 
+comm_utils/src/main/java/comm/utils/storage/HdfsHelperExtra.java  			L72
+et_storage_hdfs/src/main/java/com/fs/Es2Hdfs.java							L214, L215, L272, L273
+et_storage_hdfs/src/main/java/com/fs/es2hdfs/tools/HdfsHelper.java			L140, L179, L199
+et_upload/src/main/java/wsdl/qingdao_kancha/DataPutter.java					L47, L150
+et_upload/src/main/java/wsdl/sichuan/jdbc/SQLUtils.java						L131, L152, L198, L242, L259, L273, L286, L303, L340
+```
+
+
+
+```java
+BufferedReader br = new BufferedReader(new InputStreamReader(is, EncodeName));
+Connection conn = DriverManager.getConnection(propCfg.getProperty("db.url"), props);
+Statement stmt = conn.createStatement();
+FileWriter fw = new FileWriter(nf);
+PreparedStatement pstmt = conn.prepareStatement(sql);
+```
+
+示例：
+
+```java
+
+private void doSomething() {
+  OutputStream stream = null;
+  try {
+    for (String property : propertyList) {
+      stream = new FileOutputStream("myfile.txt"); 
+      // ...
+    }
+  } catch (Exception e) {
+    // ...
+  } finally {
+    stream.close();  
+  }
+}
+```
+
+
+2. finally 块 不要再抛出异常
+
+```
+comm_utils/src/main/java/comm/utils/storage/HdfsHelper.java					L393
+```
+
+
+
+```java
+finally {
+            throw deserializationContext.mappingException(getValueClass());
+}
+```
+
+
+
+3. arrary 转字符串，不能直接 `toString`
+
+```
+et_storage_hdfs/src/main/java/com/fs/Es2Hdfs.java				L1000, L1087
+```
+
+```java
+ logger.info("   Invalid headers:" + factor_names.toArray().toString() + "!");
+```
+
+  
+
+4. 声明一个变量取代多处引用的字符串
+
+```
+comm_utils/src/main/scala/comm/utils/ConfigHelper.scala 
+config_center/src/main/scala/com/free_sun/config/HttpHelper.scala
+```
+
+```
+"redis.guava.expireTime" 									7次
+"redis.guava.expireTime.long"								3次
+""Content-Type"												3次
+
+```
+
+
+