java读取mysql数据了过大，如何实现分页读取，求代码

Question

sql = "SELECT id, name, url ,country FROM websites";/*需要从表里面读取的数据*/ResultSet rs = stmt.executeQuery(sql);String fn = "F://NEWtest//again1.txt"; wf(fn,"ID ,站点名称, 站点,country."); while(rs.next()){     int id  = rs.getInt("id");                 String name = rs.getString("name");     String url = rs.getString("url");     String country = rs.getString("country");     System.out.print("ID: " + id);     System.out.print(", 站点名称: " + name);     System.out.print(", 站点 URL: " + url);     System.out.print(", country: " + country);     System.out.print("\n");     wf(fn,id+"," + name+ "," + url+ "," + country); }     这是读取数据库的代码，需要分页读取的代码，麻烦详细些，我刚刚接触java，谢谢

Answer 1

下面方法select(String page)的page是前台传到后台的 ，然后处理下page从数据库中分页顺序取出数据

public JSONArray select(String page) {    int limit = 10;
    JSONArray jsonArr = new JSONArray();
    Statement stmt = null;
    int start = (Integer.valueOf(page).intValue()-1) * limit;
    String sql = "SELECT id, name, url ,country FROM websites ORDER BY CREATTIME DESC LIMIT " + start + ",10;";
    ResultSet rs = stmt.executeQuery(sql);
            while(rs.next()){

int id  = rs.getInt("id");            
String name = rs.getString("name");
String url = rs.getString("url");
String country = rs.getString("country");



System.out.print("ID: " + id);

System.out.print(", 站点名称: " + name);

System.out.print(", 站点 URL: " + url);
System.out.print(", country: " + country);

System.out.print("\n");
wf(fn,id+"," + name+ "," + url+ "," + country);
}}