JDBC SQL查询字符串问题

JDBC SQL query string problem

我在将 sql 查询作为字符串插入 java 时遇到了一些问题。当我将文本直接粘贴到其中时，它不会将其保留为字符串(不知道为什么，因为其中没有双引号)，所以我尝试逐行对其进行格式化，但随后出现 sql 异常(并且我知道查询有效) .谁能发现什么给我的问题？如果没有，有没有更好的方法可以插入 sql 代码？谢谢

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public FratReport getFratReport() throws SQLException {
FratReport newfrat = NEW FratReport();
Statement stmt;
ResultSet results;
String myQuery;
myQuery = String.format("select m.nickname,"
+" case"
+" when stat_nrOfBookings/date_part('days', now()-stat_since)<0.035714 then 1"
+" when stat_nrOfBookings/date_part('days', now()-stat_since)<0.07142858 then 2"
+" when stat_nrOfBookings/date_part('days', now()-stat_since)<0.1785715 then 3"
+" when stat_nrOfBookings/date_part('days', now()-stat_since)<0.2857143 then 4"
+" else 5 end as freq,"
+" case"
+" when stat_sumPayments < 10000 then 1"
+" when stat_sumPayments < 100000 then 2"
+" when stat_sumPayments < 250000 then 3"
+" when stat_sumPayments < 500000 then 4"
+" else 5 end as am,"
+" case"
+" when count = null then 'weekday'"
+" when stat_nrOfBookings-count > count then 'weekday'"
+" else 'weekend' end as typ,"
+" case"
+" when max = null then 0"
+" when max<(now()-interval '4 weeks') then 1"
+" when max<(now()-interval '2 weeks') then 2"
+" when max<(now()-interval '1 week') then 3"
+" when max<(now()-interval '1 days') then 4"
+" else 5 end as rece"
+" from (member natural join memberstats) as m join"
+" (select rece.nickname, max, count from"
+" (select nickname , max(whenbooked) from member full join booking on member.memberNo = booking.madeBy group by member.nickname) as rece"
+" full join"
+" (select nickname, count from member full join (select nickname as nn, count(*) from (select nickname, to_char(whenbooked, 'D') from member left outer join booking on member.memberno = booking.madeBy) as days where to_char = '7' or to_char = '6' group by nickname) as c on member.nickname = c.nn) as daycount"
+" on rece.nickname = daycount.nickname)"
+" as n"
+" on m.nickname = n.nickname"
+" order by freq desc, rece desc, am desc, typ desc");

try {
stmt = conn.createStatement();
results = stmt.executeQuery(myQuery);
String newString;
while (results.next()) {
newString = results.getString("nickname") +"" +
INTEGER.toString(results.getInt("rec"))+"" +
INTEGER.toString(results.getInt("am")) +""+
results.getString("type");
newfrat.addLine(newString);
}
stmt.close();
results.close();
}
catch(SQLException e){System.out.println("yep");}
RETURN newfrat;
}