直接見代碼：
package com.oce.util;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
public class OperationTxt {
/**
* 創建文件
* @param fileName
* @return
*/
public static boolean createFile(File fileName)throws Exception{
try{
System.out.println("判斷文件是否存在");
if(!fileName.exists()){
System.out.println("文件不存在開始創建創建");
fileName.createNewFile();
}else {
System.out.println("文件文件存在準備讀取文件");
}
}catch(Exception e){
e.printStackTrace();
}
return true;
}
/**
*讀取TXT內容
* @param file
* @return
*/
public static String readTxtFile(File file){
String result = "";
try {
InputStreamReader reader = new InputStreamReader(new FileInputStream(file),"gbk");
BufferedReader br = new BufferedReader(reader);
String s = null;
while((s=br.readLine())!=null){
result = result + s;
System.out.println("讀取的內容爲："+s);
}
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
/**
* 寫入TXT，覆蓋原內容
* @param content
* @param fileName
* @return
* @throws Exception
*/
public static boolean writeTxtFile(String content,File fileName)throws Exception{
RandomAccessFile mm=null;
boolean flag=false;
FileOutputStream fileOutputStream=null;
try {
fileOutputStream = new FileOutputStream(fileName);
fileOutputStream.write(content.getBytes("UTF-8"));
fileOutputStream.close();
flag=true;
} catch (Exception e) {
e.printStackTrace();
}
return flag;
}
public static boolean writeTxtFileTwo(String content,File fileName)throws Exception{
boolean flag=false;
try {
if(content!=null && fileName!=null){
Writer out =new FileWriter(fileName);
out.write(content);
out.close();
flag=true;
}
} catch (Exception e) {
e.printStackTrace();
}
return flag;
}
public static String readTxtFileln(File file){
String result = "";
try {
InputStreamReader reader = new InputStreamReader(new FileInputStream(file),"gbk");
BufferedReader br = new BufferedReader(reader);
String s = null;
while((s=br.readLine())!=null){
if(s!=null&& !s.equals("")){
result = result+s+"\n";
}
System.out.println("讀取的內容爲："+s);
}
br.close();
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
/**
* 寫入TXT，追加寫入
* @param filePath
* @param content
*/
public static void fileChaseFW(String filePath, String content) {
if(content==null || content.equals("")){
return;
}
try {
//構造函數中的第二個參數true表示以追加形式寫文件
FileWriter fw = new FileWriter(filePath,true);
fw.write("\r\n");
fw.write(content);
fw.close();
} catch (IOException e) {
System.out.println("文件寫入失敗！" + e);
}
}
public static void main(String[] args) throws Exception{
File file = new File("C:\\Users\\hunuo\\Desktop\\robotsTxt.txt");
createFile(file);
String outText= readTxtFile(file);
System.out.println(outText);
OperationTxt.createFile(file);
boolean t= OperationTxt.writeTxtFile("11111111111111111111111111",file);
//writeTxtFile("我是寫入的內容11",file);
//fileChaseFW("C:\\Users\\hunuo\\Desktop\\Operation.txt","66666666");
//String outText1= readTxtFile(file);
//System.out.println(outText1);
// JSONObject jsonObject=StringAnalysisXml.documentToJSONObject(outText);
// System.out.println("------------------------------------------------------");
// System.out.println(jsonObject);
// JSONArray jsonElements=jsonObject.getJSONArray("sitemap");
// System.out.println(jsonElements);
System.out.println("------------------------------------------------------");
//putSeoUrl("/usr/local/nginx/html/sitemap/sitemap_top.txt","http://www.oceano.com.cn/tyd","http://www.oceano.com.cn/tyd");
//OperationTxt.outTxt(1,"/usr/local/nginx/html/sitemap/sitemap_index.xml");
}
/**
* 監測更新文件對文件目錄更新時間進行刷新
* @param index
* @param path
*/
public static void outTxt(int index,String path,boolean staic){
if(staic){
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
try {
//讀取文件
File file = new File(path);
//文件不存在就創建
createFile(file);
//讀取文件內容
String outText= readTxtFile(file);
//將xml文件轉換成jsonobejc
JSONObject jsonObject=StringAnalysisXml.documentToJSONObject(outText);
JSONArray jsonElements=jsonObject.getJSONArray("sitemap");
JSONArray jsonArray=new JSONArray();
for(int i=0;i<=jsonElements.size()-1;i++){
if(i==index){
JSONObject text=jsonElements.getJSONObject(index);
text.put("lastmod",formatter.format(new Date()));
jsonArray.add(text);
}else {
jsonArray.add(jsonElements.getJSONObject(i));
}
}
System.out.println(jsonArray);
jsonObject.put("sitemap",jsonArray);
//把文件內容寫入文本中
//writeTxtFile("123",file);
StringBuffer buffer = new StringBuffer();
buffer.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?> \n");
buffer.append("<sitemapindex>\n");
String xml=StringAnalysisXml.jsonToXmlstr(jsonObject,buffer);
writeTxtFile(xml+"</sitemapindex>",file);
}catch (Exception e){
e.printStackTrace();
}
}
}
/**
* 將更新的內容替換的對應的服務器文本上(若文本上有就進行替換，沒有就追加)
* @param path
*/
public static void putSeoUrl(String path,String oldString,String newString,boolean staic) {
if(staic){
try {
File file = new File(path);
createFile(file);
//建立臨時文件路徑
String url=path.replaceAll(path.substring(path.lastIndexOf("/")+1),"") ;
String urlPth=url+System.currentTimeMillis()+".txt";
//判斷文本中是否包含該文件，若包含就進行替換
boolean t= StringAnalysisXml.alterStringToCreateNewFile(oldString,newString,urlPth,file);
//判斷是否替換，若沒有就添加內容
if(t==false){
if(newString!=null && !newString.equals("")){
fileChaseFW(path,newString);
}
}
}catch (Exception e){
e.printStackTrace();
}
}
}
/**
* 根據網絡路徑獲取文件內容
* @param filePath
* @return
*/
public static String openFile(String filePath) {
int HttpResult; // 服務器返回的狀態
String ee = new String();
try
{
URL url =new URL(filePath); // 創建URL
URLConnection urlconn = url.openConnection(); // 試圖連接並取得返回狀態碼
urlconn.connect();
HttpURLConnection httpconn =(HttpURLConnection)urlconn;
HttpResult = httpconn.getResponseCode();
if(HttpResult != HttpURLConnection.HTTP_OK) {
System.out.print("無法連接到");
} else {
int filesize = urlconn.getContentLength(); // 取數據長度
InputStreamReader isReader = new InputStreamReader(urlconn.getInputStream(),"UTF-8");
BufferedReader reader = new BufferedReader(isReader);
StringBuffer buffer = new StringBuffer();
String line; // 用來保存每行讀取的內容
line = reader.readLine(); // 讀取第一行
while (line != null) { // 如果 line 爲空說明讀完了
buffer.append(line); // 將讀到的內容添加到 buffer 中
buffer.append(" "); // 添加換行符
line = reader.readLine(); // 讀取下一行
}
System.out.print(buffer.toString());
ee = buffer.toString();
}
}
catch (FileNotFoundException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
return ee;
}
}