【发布时间】:2009-07-09 04:12:04
【问题描述】:
下面的方法,当用String val = getCell("SELECT col FROM table WHERE LIKE(other_col,'?')", new String[]{"value"});(这是SQLite)之类的东西调用时,会抛出一个java.lang.ArrayIndexOutOfBoundsException: 0 at org.sqlite.PrepStmt.batch(PrepStmt.java:131)。谁能同情我在这里的笨拙笨拙并帮助我为什么?
/**
* Get a string representation of the first cell of the first row returned
* by <code>sql</code>.
*
* @param sql The SQL SELECT query, that may contain one or more '?'
* IN parameter placeholders.
* @param parameters A String array of parameters to insert into the SQL.
* @return The value of the cell, or <code>null</code> if there
* was no result (or the result was <code>null</code>).
*/
public String getCell(String sql, String[] parameters) {
String out = null;
try {
PreparedStatement ps = connection.prepareStatement(sql);
for (int i = 1; i <= parameters.length; i++) {
String parameter = parameters[i - 1];
ps.setString(i, parameter);
}
ResultSet rs = ps.executeQuery();
rs.first();
out = rs.getString(1);
rs.close();
ps.close();
} catch (SQLException e) {
e.printStackTrace();
}
return out;
}
在这种情况下,setString() 将是 ps.setString(1, "value"),应该不是问题。显然我错了。
非常感谢。
【问题讨论】:
标签: java sql parameters prepared-statement