参见英文答案 > PreparedStatement IN clause alternatives? 28个
如何在执行查询时在JDBC中的preparedStatement中设置in子句的值.
例:
connection.prepareStatement("Select * from test where field in (?)");
如果此子句可以包含多个值,我该怎么做.有时我事先知道参数列表,有时我事先不知道.如何处理这种情况?
解决方法:
例如:
List possibleValues = ...
StringBuilder builder = new StringBuilder();
for( int i = 0 ; i < possibleValue.size(); i++ ) {
builder.append("?,");
}
String stmt = "select * from test where field in ("
+ builder.deleteCharat( builder.length() -1 ).toString() + ")";
PreparedStatement pstmt = ...
然后愉快地设置了参数
int index = 1;
for( Object o : possibleValue ) {
pstmt.setobject( index++, o ); // or whatever it applies
}