java - Jdbc Postgresql 没有执行查询

Question

我正在尝试通过 jdbc 将我的 android 应用程序连接到我的 postgresql 数据库，登录顺利但是当我尝试运行查询 explotes 并给我这个错误：

11-24 11:03:14.966: E/AndroidRuntime(673):  at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:403)
11-24 11:03:14.966: E/AndroidRuntime(673):  at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:283)

这是建立连接的函数的代码：

public void save_info(Element plate_info){
         String retval = "";
         try {
             Class.forName("org.postgresql.Driver");
         } catch (ClassNotFoundException e) {
             e.printStackTrace();
             retval = e.toString();
         }
         String url = "jdbc:postgresql://test.com:5432/test_db?user=adsfsdfasd&password=2222222";
         Connection conn;
         try {
             DriverManager.setLoginTimeout(5);
             conn = DriverManager.getConnection(url);
             Statement st = conn.createStatement();
             ResultSet rs = st.executeQuery("INSERT INTO order_tbl (custumer, _name, additional, ingredients_) VALUES('adsfasdf','asdfasdfasdf', 'asdfasdfasd', 'asdfasdfasdf', 'dasfasdf')");
             while(rs.next()) {
                 retval = rs.getString(1);
             }
             rs.close();
             st.close();
             conn.close();
             System.out.println(retval);
         } catch (SQLException e) {
             e.printStackTrace();
             retval = e.toString();

         }

    }

Answer 1

这就是你所需要的。

DriverManager.setLoginTimeout(5);
conn = DriverManager.getConnection(url);
Statement st = conn.createStatement();
st.execute("INSERT INTO order_tbl (custumer, _name, additional, ingredients_) VALUES('adsfasdf','asdfasdfasdf', 'asdfasdfasd', 'asdfasdfasdf', 'dasfasdf')");

这是关于如何使用 SQL 插入的快速教程http://www.youtube.com/watch?v=Zto0PovkbKo

Answer 2

你需要打电话executeUpdate，而不是executeQuery

int numRowsAffected = st.executeUpdate("INSERT INTO order_tbl (custumer, _name, additional, ingredients_) VALUES('adsfasdf','asdfasdfasdf', 'asdfasdfasd', 'asdfasdfasdf', 'dasfasdf')");