数据库分页

数据库分页（有时候忘了）：

mysql：

public String getLimitString(String sql, Integer offset, Integer limit) {

sql = sql.trim();

sql+=" limit "+offset+","+limit;

return sql;

}

sqlserver：

public String getLimitString(String sql, Integer offset, Integer limit) {

sql = sql.trim();

int i=sql.indexOf("order");

String sqlfinal=sql.substring(0, i);

String order=sql.substring(i);

StringBuffer pageSql = new StringBuffer(sql.length() + 100);

// 其实这里还是有一点问题的，就是排序问题，指定死了，有解决的提供一下，等复习到Hibernate看看Hibernat内部是如何实现的。

pageSql.append("select * from(select a.*,row_number() over ("+order+") rownum from( ");

pageSql.append(sqlfinal);

pageSql.append(") a )b where rownum> " + offset + " and rownum <= " + (offset + limit));

return pageSql.toString();

}

oracle：

public String getLimitString(String sql, Integer offset, Integer limit) {

sql = sql.trim();

StringBuffer pagingSelect = new StringBuffer(sql.length() + 100);

pagingSelect.append("select * from ( select row_.*, rownum rownum_ from ( ");

pagingSelect.append(sql);

pagingSelect.append(" ) row_ ) where rownum_ > ").append(offset).append(" and rownum_ <= ").append(offset + limit);

return pagingSelect.toString();

}