一、文档读取
(1)将文件读取为String
/** 2019/12/26
* 将文档打开,并将文档内容读入String中
*/
public static String TxtToString(File file) {
String result = "";
try {
BufferedReader br = new BufferedReader(new FileReader(file));//构造一个BufferedReader类来读取文件
String s = null;
while ((s = br.readLine()) != null) {//使用readLine方法,一次读一行
result = result + "\n" + s;
}
br.close();
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
(2)将文件读取为List集合(按行)
/** 2019/12/26
* 将文档打开,将文档内容按行读入集合中
*/
public static List<String> TxtToStringList(File file) {
List<String> result = new ArrayList<>();
try {
if (!file.exists()){
return null;
}
BufferedReader br = new BufferedReader(new FileReader(file));//构造一个BufferedReader类来读取文件
String s = null;
while ((s = br.readLine()) != null) {//使用readLine方法,一次读一行
result.add(s);
}
br.close();
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
二、Java存储文件
(1)将list按行写入到txt文件中
/**
* 将list按行写入到txt文件中
* @param strings
* @throws Exception
*/
public static void writeFileContext(List<String> strings) throws Exception {
File file = new File("D:\\IntellijIDEAProject\\KeChenSheJi\\data\\WordLibrary_index");
//如果没有文件就创建
if (!file.isFile()) {
file.createNewFile();
}
BufferedWriter writer = new BufferedWriter(new FileWriter("D:\\IntellijIDEAProject\\KeChenSheJi\\data\\WordLibrary_index"));
for (String l:strings){
writer.write(l + "\r\n");
}
writer.close();
}
(2)按照名字,将string类型的集合存入文件
/**
* 按照名字,将string类型的集合存入文件
* */
public static void writeFileContext_Find(List<String> strings,String name) throws Exception {
File file = new File("D:\\IntellijIDEAProject\\KeChenSheJi\\data\\wordIndex");
//如果没有文件就创建
if (!file.isFile()) {
file.createNewFile();
}
BufferedWriter writer = new BufferedWriter(new FileWriter("D:\\IntellijIDEAProject\\KeChenSheJi\\data\\wordIndex\\"+name));
for (String l:strings){
writer.write(l + "\r\n");
}
writer.close();
}
(3)将Sting类型的list集合 按文件地址存储
/** 2019/12/26
* 将Sting类型的list集合 按文件地址存储
*/
public static void writeFileContext_Found(List<String> strings,String filename) throws Exception {
File file = new File(filename);
//如果没有文件就创建
if (!file.isFile()) {
file.createNewFile();
}
BufferedWriter writer = new BufferedWriter(new FileWriter("D:\\IntellijIDEAProject\\KeChenSheJi\\data\\file_index\\"+file.getName()));
for (String l:strings){
writer.write(l + "\r\n");
}
writer.close();
}