properties配置文件的读写类
先贴出代码，有空再来写说明。import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import java.util.Properties;import java.util.Set;public class SingleProperty { private Properties prop = null; private InputStream in = null; private OutputStream os; private String path; public SingleProperty(String path) { this.path = path; initProperty(); } public SingleProperty() { prop = new Properties(); } public void setPath(String path) { try { in = new FileInputStream(this.path); } catch (FileNotFoundException ex) { } } private void initProperty() { try { prop = new Properties(); //System.getProperty("user.dir") 获得项目所在位置路径，如 F:\zgh\netbeanspace\ClientTest //path=conf/config.properties 此位置为项目所在路径下的conf/config.properties文件路径，conf与lib并列 in = new FileInputStream(this.path); } catch (FileNotFoundException ex) { } } private void setIs() { try { if (in == null) { in = new FileInputStream(this.path); } } catch (IOException ex) { } } private void setOs() { try { os = new FileOutputStream(this.path); //"src/org/lt/cj/config/config.properties" } catch (FileNotFoundException ex) { } } //获取所有属性 public Properties getProperty() { try { setIs(); prop.load(in); } catch (IOException ex) { } return prop; } //获取属性值 public String getValue(String key) { String value = ""; try { setIs(); prop.load(in); value = prop.getProperty(key); } catch (IOException ex) { } return value; } //将Map的键值对添加到配置文件，值允许用空字符 public void addProperty(Map<String, String> map, String comments) { try { setIs(); prop.load(in); setOs(); Set keys = map.keySet(); for (Iterator it = keys.iterator(); it.hasNext();) { String key = (String) it.next(); String value = map.get(key); prop.setProperty(key, value); } prop.store(os, comments); } catch (IOException ex) { } } //修改属性值 public void setProperty(String key, String value) { prop.setProperty(key, value); } //保存配置文件 public void store(String comments) { try { setOs(); prop.store(os, comments); } catch (IOException ex) { } } //删除key所指向的属性值 public void deleteProperty(String key, String comments) { try { setIs(); prop.load(in); prop.remove(key); setOs(); prop.store(os, comments); } catch (IOException ex) { } } //关闭读配置文件的IO public void endAndcloseIO() { try { if (os != null) { os.flush(); os.close(); } if (in != null) { in.close(); } } catch (IOException ex) { } } //打印配置文件中的所有属性 public void printMap(Map map) { Set keys = map.keySet(); for (Iterator it = keys.iterator(); it.hasNext();) { Object key = it.next(); Object value = map.get(key); System.out.println(key + "==" + value); } } public static void main(String[] args) throws Exception { SingleProperty p = new SingleProperty("src/com/test/config.properties"); Map<String, String> map = new HashMap<String, String>(); map.put("myParam", "hello"); map.put("parameter2", "Hi,nice to meet you."); p.addProperty(map, "修改配置参数"); }}
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