保存数据到本地文件
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private void saveDataToFile(String fileName,String data) {
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BufferedWriter writer = null;
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File file = new File("d:\\"+ fileName + ".json");
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//如果文件不存在，则新建一个
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if(!file.exists()){
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try {
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file.createNewFile();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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//写入
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try {
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writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file,false), "UTF-8"));
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writer.write(data);
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} catch (IOException e) {
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e.printStackTrace();
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}finally {
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try {
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if(writer != null){
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writer.close();
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}
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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System.out.println("文件写入成功！");
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}
取数据
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private String getDatafromFile(String fileName) {
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-
String Path="d:\\" + fileName+ ".json";
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BufferedReader reader = null;
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String laststr = "";
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try {
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FileInputStream fileInputStream = new FileInputStream(Path);
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InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream, "UTF-8");
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reader = new BufferedReader(inputStreamReader);
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String tempString = null;
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while ((tempString = reader.readLine()) != null) {
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laststr += tempString;
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}
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reader.close();
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} catch (IOException e) {
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e.printStackTrace();
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} finally {
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if (reader != null) {
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try {
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reader.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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return laststr;
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}