文件的打开读写操作(文件选择器)

自己整理了个文件读写选择器的类，方便以后需要的时候拿来用，不用辛辛苦苦从头再写。可根据具体需要截取其中的某个方法到项目中使用。

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.filechooser.FileFilter;

/**
 *
 * @author ahomeeye
 */
public class ReadAndWrite extends JFrame {

    private String path;

//打开文件，获取绝对路径
    public void openFile() {
        JFileChooser jfc = new JFileChooser();
        jfc.setFileFilter(new FileFilter() {

            public boolean accept(File f1) {
                if (f1.isDirectory() || f1.getName().trim().endsWith(".properties")) { //默认问题类型为.properties
                    return true;
                }
                return false;
            }

            public String getDescription() {
                return "properties文件";
            }
        });
        int optionNum = jfc.showOpenDialog(getContentPane());
        if (optionNum == JFileChooser.APPROVE_OPTION) {// 选择确认（yes、ok）
            // 后返回该值。
            File f1 = jfc.getSelectedFile();
            path = f1.getAbsolutePath();
        }
    }

//写入内容
    public void writer(String filePath) {
        BufferedWriter bw = null;
        try {
            bw = new BufferedWriter(new OutputStreamWriter(
                    new FileOutputStream(filePath, false), "utf8"));
            bw.write("这是新添的内容。");
            bw.flush();
        } catch (FileNotFoundException e1) {
        } catch (IOException e1) {
        } finally {
            if (bw != null) {
                try {
                    bw.close();
                } catch (Exception e2) {
                }
            }
        }
    }

    //读取内容
    public void reader(String filePath) {
        try {
            try {
                BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(filePath), "utf8"));
                StringBuilder sb = new StringBuilder();
                String str = "";
                try {
                    while ((str = br.readLine()) != null) {
                        sb.append(str);
                        sb.append("\n");
                    }
                } catch (IOException ex) {
                }
                System.out.println("sb=" + sb.toString());

            } catch (FileNotFoundException ex) {
            }
        } catch (UnsupportedEncodingException ex) {
        }
    }

    public static void main(String[] args) {
        ReadAndWrite rw = new ReadAndWrite();
        rw.openFile();
        System.out.println("path=" + rw.path);
    }
}