Java生成带注释properties属性文件

我就是我 2022-06-03 05:12 270阅读 0赞

import java.io.BufferedWriter;  
    
    import java.io.IOException;  
    
    import java.io.Writer;  
    
    import java.util.Date;  
    
    import java.util.Iterator;  
    
    import java.util.LinkedHashMap;  
    
    import java.util.Properties;  
    
    public class OutputOrderProperties extends Properties  {  
    
        private LinkedHashMap<String, String> commentMap = new LinkedHashMap<String,String>();  
    
        private static final long serialVersionUID = 1L;  
        
        public OutputOrderProperties()  {  
        	super();  
        }  
    
        public OutputOrderProperties(Properties properties)  {  
            super(properties);  
            Iterator<Object> iterator = properties.keySet().iterator();  
            while(iterator.hasNext()) {  
                Object key = iterator.next();  
                this.commentMap.put((String) key, null);  
            }  
        }        
    
        public boolean addComment(String key , String comment)  {  
            if(this.contains(key))  {  
                this.commentMap.put(key, comment);  
                return true;  
            }  
            return false;  
        }  
    
        public void put(String key , String value , String comment)  {  
            this.commentMap.put(key, comment);  
            this.setProperty(key, value);  
        }
        
        public void put(String key , String value)  {   
            this.setProperty(key, value);  
        }  
    
        public void orderStore(Writer writer , String comments) throws IOException {  
            BufferedWriter bufferedWriter = (writer instanceof BufferedWriter) ? (BufferedWriter)writer : new BufferedWriter(writer);  
            if (comments != null)  {  
                OutputOrderProperties.writeComments(bufferedWriter, comments);  
            }   
            synchronized (this)   {  
                Iterator<String> iterator = this.commentMap.keySet().iterator();  
                while(iterator.hasNext())  {  
                    String key = iterator.next();  
                    String value = this.getProperty(key);  
                    String comment = this.commentMap.get(key);  
                    key = saveConvert(key, true, false);  
                    value = saveConvert(value, false, false);  
                    key = saveConvert(key, true, false);  
                    if(comment != null && ! comment.equals(""))  {  
                        writeComments(bufferedWriter, comment);  
                    }  
                    bufferedWriter.write(key+"="+value);  
                    bufferedWriter.newLine();  
                }  
             }  
            bufferedWriter.flush();      
        }  
    
        private String saveConvert(String theString,boolean escapeSpace, boolean escapeUnicode) {  
            int len = theString.length();  
            int bufLen = len * 2;  
            if (bufLen < 0) {  
                bufLen = Integer.MAX_VALUE;  
            }  
            StringBuffer outBuffer = new StringBuffer(bufLen);  
            for(int x=0; x<len; x++) {  
                char aChar = theString.charAt(x);    
                if ((aChar > 61) && (aChar < 127)) {  
                    if (aChar == '\\') {  
                        outBuffer.append('\\'); outBuffer.append('\\');  
                        continue;  
                    }  
                    outBuffer.append(aChar);  
                    continue;  
                }  
                switch(aChar) {  
            case ' ':  
                if (x == 0 || escapeSpace)   
                outBuffer.append('\\');  
                outBuffer.append(' ');  
                break;  
                    case '\t':outBuffer.append('\\'); outBuffer.append('t');  
                              break;  
                    case '\n':outBuffer.append('\\'); outBuffer.append('n');  
                              break;  
                    case '\r':outBuffer.append('\\'); outBuffer.append('r');  
                              break;  
                    case '\f':outBuffer.append('\\'); outBuffer.append('f');  
                              break;  
                    case '=': // Fall through  
                    case ':': // Fall through  
                    case '#': // Fall through  
                    case '!':  
                        outBuffer.append('\\'); outBuffer.append(aChar);  
                        break;  
                    default:  
                        if (((aChar < 0x0020) || (aChar > 0x007e)) & escapeUnicode ) {  
                            outBuffer.append('\\');  
                            outBuffer.append('u');  
                            outBuffer.append(toHex((aChar >> 12) & 0xF));  
                            outBuffer.append(toHex((aChar >>  8) & 0xF));  
                            outBuffer.append(toHex((aChar >>  4) & 0xF));  
                            outBuffer.append(toHex( aChar        & 0xF));  
                        } else {  
                            outBuffer.append(aChar);  
                        }  
                }  
            }  
            return outBuffer.toString();  
        }   
    
        private static void writeComments(BufferedWriter bw, String comments)throws IOException {  
                bw.write("#"); 
                bw.write(comments);  
            	bw.newLine();
    
        }  
    
    
        private static char toHex(int nibble) {  
            return hexDigit[(nibble & 0xF)];  
        } 
    
        private static final char[] hexDigit = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};  
                
    }

调用测试：

public class Test {
    
    	public static void main(String[] args) {
    		OutputOrderProperties p = new OutputOrderProperties();
    		//生成文件
    		OutputStream os = new FileOutputStream("模板文件路径");
    		p.put("jdbc.name", dbConfig.getJdbcName(),"jdbc名称");
    		p.orderStore(new OutputStreamWriter(os, "utf-8"), null);
    		//读取文件
    		FileInputStream fs = new FileInputStream("模板文件路径");
    		p.load(new InputStreamReader(fs, "utf-8"));	  
    		System.out.println(p.get(key));      
    	}
    
    }