JAVA中float小数点后边的位数如何和控制

[horse_leo_zhcn]

源码奉上

package com.mtqj.quotes.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;

import com.mtqj.quotes.Util.DBUtil;
import com.mtqj.quotes.model.Surface;

public class SurfaceDao {

	Connection conn = null;
	PreparedStatement ps = null;
	ResultSet rs = null;

	public ArrayList<Surface> getSurfaces(String mid) {
		ArrayList<Surface> surfaceList = new ArrayList<Surface>();
		String sql = "select * from Surface where m_id = ?;";
		conn = DBUtil.getConn();
		try {
			ps = conn.prepareStatement(sql);
			ps.setString(1, mid);
			rs = ps.executeQuery();
			while (rs.next()) {
				Surface s = new Surface();
				s.setS_id(rs.getInt("S_id"));
				s.setM_id(rs.getInt("M_id"));
				s.setSurface(rs.getString("Surface"));
				s.setFee(rs.getFloat("Fee"));

				surfaceList.add(s);

			}

		} catch (Exception e) {
			// TODO: handle exception
			e.printStackTrace();
		}

		return surfaceList;
	}

}

以上代码中，我需要把s.setFee(rs.getFloat("Fee"));控制在小数点后面2位，但是我不知道如何转换！！！


请各位出手！！！

[郭梧悠]

DecimalFormat df=new DecimalFormat("#.00");

[kjk7820329]

DecimalFormat df = new DecimalFormat( "0.00000 "); System.out.println(df.format(b));

[郭梧悠]

df.format(xxx)

[天天快乐]

都是好办法啊。