异常:Operation not allowed after ResultSet closed的解决
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这个错误是由于一个Statment进行多个ResultSet的查询操作而造成的。
每一次ResultSet的操作,都会导致上一个操作的被迫关闭,并抛出异常,如:
ResultSet rs1=xxx.exec("sql");while(rs1.next()){ ResultSet rs2=xxx.exec("sql");}
解决方法就是从Connection create一个新的 Statment去执行ResultSet相关的操作:
public Statement getNewStatement(){try {return con.createStatement();} catch (SQLException e) {e.printStackTrace();}return null;}
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