Question

民间

我正在使用一个模板文件，它将被送入一个String变量，但是当我写下该字符串的内容时，它会忽略文件中的换行符。

如何保留原始文件中的换行符，以便输出文件还包含这些换行符？

代码

      InputStream in = classLoader.getResourceAsStream("templates/reportTemplate.html");
      BufferedReader reader = new BufferedReader(new InputStreamReader(in));
      //File htmlTemplateFile = new File();
     // String htmlString = FileUtils.read(classLoader.getResourceAsStream("templates/reportTemplate.html");)
      String body = data;
      StringBuilder result = new StringBuilder("");
      String line;
      while ((line = reader.readLine()) != null) {
            result.append(line);
        }
        in.close();

          File newHtmlFile = new File(fileLocation + "/report.html");
          FileUtils.writeStringToFile(newHtmlFile, result.toString().replace("$body", body));
          Path path = Paths.get(fileLocation + "/report.html");
          Charset charset = StandardCharsets.ISO_8859_1;

          String content = new String(Files.readAllBytes(path),charset);
          // Not working :: String newLineChar = System.getProperty("line.separator");
          // Not working :: content = content.replaceAll("\\n", newLineChar);
         content = content.replaceAll("\\$highrisk", Integer.toString(highrisk));
        content = content.replaceAll("\\$criticalrisk", Integer.toString(criticalrisk));
        content = content.replaceAll("\\$mediumrisk", Integer.toString(mediumrisk));
        content = content.replaceAll("\\$lowrisk", Integer.toString(lowrisk));
          Files.write(path, content.getBytes(charset));

模板文件（帮助那些无法复制的人）

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
 <meta charset="utf-8">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
 <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
 <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
 <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
 <script type="text/javascript">
// Load google charts
google.charts.load('current', {'packages':['corechart']});
google.charts.setOnLoadCallback(drawChart);

// Draw the chart and set the chart values
function drawChart() {
  var data = google.visualization.arrayToDataTable([
  ['Risk', 'Risk Meter'],
  ['Medium', $mediumrisk],
  ['Critical', $criticalrisk],
  ['High', $highrisk],
  ['Low', $lowrisk],
]);

  // Optional; add a title and set the width and height of the chart
  var options = {'title':'Risk Coverage', 'width':550, 'height':400};

  // Display the chart inside the <div> element with id="piechart"
  var chart = new google.visualization.PieChart(document.getElementById('piechart'));
  chart.draw(data, options);
}
</script>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>myAp Report</title>
</head>
<body>
<div class="container" style="float: left;"> 
  <h2>Report from myApp</h2>
  <p>This report contains summary of scan results from my app</p>
$body
</div>
<div id="piechart"></div>
</body>
</html>

Answer 1

出现了问题：

StringBuilder result = new StringBuilder("");
String line;
while ((line = reader.readLine()) != null) { // <---
    result.append(line);
}
in.close();

BufferedReader::readLine读取一行，但不是结尾的行：

返回：包含该行内容的字符串，不包括任何行终止字符

如果你想读取一个文件，同时也以行结尾结束，你可以这样做：

InputStream in = classLoader.getResourceAsStream("templates/reportTemplate.html");
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String result = reader.lines().collect(Collectors.joining(System.lineSeparator()));
reader.close();

Answer 2

        StringBuilder result = new StringBuilder();
        String line;
        String newLineChar = System.getProperty("line.separator");
        while ((line = reader.readLine()) != null) {
            result.append(line);
            result.append(newLineChar);
        }

在每个读取行后添加newLineChar ...

如何在String readAllBytes

2 个答案: