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                        /后端開發(fā)
                        
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                        /JDBC之 “ 對(duì)岸的女孩看過來”

如果我要查詢單個(gè)女神的信息，那map.put("value", "???");這個(gè)要怎么寫

因?yàn)?"里面是字符串，填任何值的話都變成字符串了，該怎么做呢。。

else if (OPERATION_GET.equals(in.toUpperCase()) || OPERATION_GET.substring(0, 1).equals(in.toUpperCase())){
?? ??? ??? ??? ?List<Map<String, Object>> params = new ArrayList<>();
?? ??? ??? ??? ?Map<String, Object> map = new HashMap<>();
?? ??? ??? ??? ?
?? ??? ??? ??? ?System.out.println("請(qǐng)輸入您要查詢女神的id：");
?? ??? ??? ??? ?String s = scan.nextLine().toString();
?? ??? ??? ??? ?
?? ??? ??? ??? ?map.put("name","user_name");
?? ??? ??? ??? ?map.put("rela","=");
?? ??? ??? ??? ?map.put("value", "???");
?? ??? ??? ??? ?
?? ??? ??? ??? ?params.add(map);
?? ??? ??? ??? ?
?? ??? ??? ??? ?List<Goddess> list;
?? ??? ??? ??? ?try {
?? ??? ??? ??? ??? ?list = action.query(params);
?? ??? ??? ??? ??? ?for (int i = 0; i < list.size(); i++) {
?? ??? ??? ??? ??? ??? ?System.out.println(list.get(i).getId() + " " + list.get(i).getUser_name());
?? ??? ??? ??? ??? ?}
?? ??? ??? ??? ?} catch (Exception e) {
?? ??? ??? ??? ??? ?e.printStackTrace();
?? ??? ??? ??? ?}?
?? ??? ??? ?}

失心客

2016-04-06

源自：JDBC之 “ 對(duì)岸的女孩看過來” 2-9

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5 回答

notmatter
2016-04-16

我改成了圖書的，你在稍微改一下就可以咯

??? else if(OPERATION_GET.equals(in.toUpperCase())||OPERATION_GET.substring(0,1).equals(in.toUpperCase()))
?? ??? ??? ?{
?? ??? ??? ??? ?System.out.println("請(qǐng)輸入要查詢的圖書的 [編號(hào)]");
?? ??? ??? ??? ?Integer i=scan.nextInt();
?? ??? ??? ??? ?try {
?? ??? ??? ??? ??? ?Goddess go=action.get(i);
?? ??? ??? ??? ??? ?System.out.println(go.getId()+"? "+go.getBook_name()+"??? "+go.getAuthor()+"??? "+go.getPublish());
?? ??? ??? ??? ?} catch (SQLException e) {
?? ??? ??? ??? ??? ?// TODO Auto-generated catch block
?? ??? ??? ??? ??? ?e.printStackTrace();
?? ??? ??? ??? ??? ?System.out.println("查詢圖書失敗");
?? ??? ??? ??? ?}
?? ??? ??? ?}