问题描述
- 请教各位大神,遍历数据库 为什么只有一条数据,里面明明有两条数据,哪位大神帮忙看看
-
<%
Connection con;
Statement stmt;
ResultSet rs;
Class.forName("com.mysql.jdbc.Driver");
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
String DbConn = "jdbc:mysql://localhost/test";
String DbPass="343296580";
con = java.sql.DriverManager.getConnection(DbConn,"root",DbPass);
stmt = con.createStatement();
rs = stmt.executeQuery("select * from words");ResultSetMetaData data=rs.getMetaData(); ArrayList<HashMap<String,String>> al = new ArrayList<HashMap<String,String>>(); HashMap<String,String> map = new HashMap<String,String>(); while(rs.next())
while (rs.next()) {
for (int i = 1; i <= data.getColumnCount(); i++) { // 数据库里从 1 开始 String c = data.getColumnName(i); String v = rs.getString(c); map.put(c, v); } al.add(map); }
out.println(al);
stmt.close(); con.close();
%>
结果是: [{id=2, chword=学校, enword=school}]
解决方案
为什么循环是从一开始的呢 ?是从0开始的吧
时间: 2024-08-01 02:55:22