java gc close ps

ml_c_et_pe_preciseexposure_dimen_d_rt/src/main/java/com/gmei/jdbc/MysqlJdbcDim.java

@@ -79,8 +79,7 @@ public class MysqlJdbcDim {
         st.executeUpdate(sql);
     }
 
-    public ResultSet query(String sql, List<Object> param) {
-        Statement st = null;
+    public ResultSet query(String sql, List<Object> param) throws SQLException {
         PreparedStatement ps = null;
         ResultSet rs = null;
         try {
@@ -96,6 +95,8 @@ public class MysqlJdbcDim {
             rs = ps.executeQuery();
         } catch (SQLException e) {
             e.printStackTrace();
+        } finally {
+            ps.close();
         }
         return rs;
     }