将ResultSet转为List
public static List resultSetToList(ResultSet rs) throws java.sql.SQLException {
if (rs == null)
return Collections.EMPTY_LIST;
ResultSetMetaData md = rs.getMetaData(); //得到结果集(rs)的结构信息,比如字段数、字段名等
int columnCount = md.getColumnCount(); //返回此 ResultSet 对象中的列数
List list = new ArrayList();
Map rowData = new HashMap();
while (rs.next()) {
rowData = new HashMap(columnCount);
for (int i = 1; i <= columnCount; i++) {
rowData.put(md.getColumnName(i), rs.getObject(i));
}
list.add(rowData);
System.out.println("list:" + list.toString());
}
return list;
}
接着在其他方法里处理返回的Listif (rs == null)
return Collections.EMPTY_LIST;
ResultSetMetaData md = rs.getMetaData(); //得到结果集(rs)的结构信息,比如字段数、字段名等
int columnCount = md.getColumnCount(); //返回此 ResultSet 对象中的列数
List list = new ArrayList();
Map rowData = new HashMap();
while (rs.next()) {
rowData = new HashMap(columnCount);
for (int i = 1; i <= columnCount; i++) {
rowData.put(md.getColumnName(i), rs.getObject(i));
}
list.add(rowData);
System.out.println("list:" + list.toString());
}
return list;
}
List ls = resultSetToList(rs);
Iterator it = ls.iterator();
while(it.hasNext()) {
Map hm = (Map)it.next();
System.out.println(hm.get("字段名大写"));
}
Iterator it = ls.iterator();
while(it.hasNext()) {
Map hm = (Map)it.next();
System.out.println(hm.get("字段名大写"));
}