项目中碰到的一个小问题，现将解决方法开源，主要由三步组成。废话不多上代码。
1 主函数
static String[] keywordString = {
"abstract", "assert", "boolean",
"break", "byte", "case", "catch", "char", "class", "const",
"continue", "default", "do", "double", "else", "enum",
"extends", "for", "final", "finally", "float", "goto", "if",
"implements", "import", "instanceof", "int", "interface",
"long", "native", "new", "package", "private", "protected",
"public", "return", "short", "static", "strictfp", "super",
"switch", "synchronized", "this", "throw", "throws",
"transient", "try", "void", "volatile", "while",
"true", "false", "null"};
static HashSet<String> keywordSet=new HashSet<String>(Arrays.asList(keywordString));
public static void main(String[] args) {
String filename="C:/Users/Ethan/workspace/Text/tx2.txt";
String filename2="C:/Users/Ethan/workspace/Text/javaH.html";
try {
Scanner input = new Scanner(new File(args[0]));
PrintWriter output = new PrintWriter(new File(args[1]));
JavaToHTML(input, output);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
}
2 将Java源代码转为HTML
static void translateToHTML(String text, Scanner input, PrintWriter output) throws Exception {
text = text.replaceAll("// ", "LINECOMMENT");
text = text.replaceAll("/\\*", "BLOCKCOMMENT");
String token;
while (text != null && text.length() > 0) {
// * and / are in conflict with /* and //
String[] parts = text.split("[%\\+\\-\\*/\r\n\t \\[\\].;(){},]", 2);
token = parts[0];
if (token.length() > 1 && token.startsWith("LINECOMMENT")) {
output.format("%s", "<span class = \"comment\">");
parts = text.split("\r\n", 2);
text = parts[1];
output.format("%s", parts[0].replaceAll("LINECOMMENT", "// "));
output.format("%s", "</span>\r\n");
continue;
}
else if (token.length() > 1 && token.startsWith("BLOCKCOMMENT")) {
output.format("%s", "<span class = \"comment\">");
parts = text.split("\\*/", 2);
text = parts[1];
output.format("%s", parts[0].replaceAll("BLOCKCOMMENT", "/*") + "*/");
output.format("%s", "</span>");
continue;
}
else if (token.length() > 1 && token.matches("'\\w'*")) {
output.format("%s", "<span class = \"literal\">");
output.format("%s", token);
output.format("%s", "</span>");
}
else if (token.startsWith("\"") && token.endsWith("\"") &&
(token.length() > 1)) {
output.format("%s", "<span class = \"literal\">" + token
+ "</span>");
}
else if (token.startsWith("'") && token.endsWith("'") &&
(token.length() > 1)) {
output.format("%s", "<span class = \"literal\">" + token
+ "</span>");
}
else if (token.equals("' '")) {
output.format("%s", "<span class = \"literal\">" + token
+ "</span>");
}
else if (token.startsWith("\"") && token.endsWith("\"") &&
(token.length() == 1)) {
if (stringToken) {
output.format("%s", token + "</span>");
stringToken = false;
}
else {
output.format("%s", "<span class = \"literal\">" + token);
stringToken = true;
}
}
else if (token.startsWith("\"")) {
output.format("%s", "<span class = \"literal\">" + token);
stringToken = true;
}
else if (token.endsWith("\"") && (!token.endsWith("\\\""))) {
output.format("%s", token);
output.format("%s", "</span>");
stringToken = false;
}
else if (token.matches("\\d+")) { // Check if numeric
output.format("%s", "<span class = \"literal\">" + token +
"</span>");
}
else if (!stringToken && keywordSet.contains(token)) {
output.format("%s", "<span class = \"keyword\">" + token +
"</span>");
}
else {
output.format("%s", token);
}
if (token.length() < text.length()) {
if (text.charAt(token.length()) == '<')
output.format("%s", "<");
else if (text.charAt(token.length()) == '>')
output.format("%s", ">");
else
output.format("%s", text.charAt(token.length()));
}
if (parts.length == 2) {
text = parts[1];
}
}
}
3 代码高亮功能实现与按照HTML格式进行封装
static boolean stringToken = false;
static String inputFileName;
public static void JavaToHTML(Scanner input, PrintWriter output) {
try {
output.format("%s\r\n", "<html>");
output.format("%s\r\n", "<head>");
output.format("%s\r\n",
"<title>Intro to Java Programming, 6E - " + inputFileName +
"</title>");
output.format("%s\r\n",
"<meta http-equiv=\"Content-Type\" content=\"text/html; charset=windows-1252\">");
output.format("%s\r\n", "<style type = \"text/css\">");
output.format("%s\r\n",
"body {font-family: \"Courier New\", sans-serif; font-size: 100%; color: black}");
output.format("%s\r\n",
".keyword {color: #000080; font-weight: bold}");
output.format("%s\r\n", ".comment {color: #008000}");
output.format("%s\r\n", ".literal {color: #0000ff}");
output.format("%s\r\n", ".keyword {color: black; font-weight: bold}");
output.format("%s\r\n", ".comment {color: #77797C}");
output.format("%s\r\n", ".literal {color: #007346; font-weight: bold}");
output.format("%s\r\n", "</style>");
output.format("%s\r\n", "</head>");
output.format("%s\r\n", "<body>");
output.format("%s\r\n", "<pre>");
String text = "";
String temp;
// Read all lines
while (input.hasNext()) {
temp = input.nextLine();
text += temp + "\r\n";
}
text = text.replaceAll(">", ">");
text = text.replaceAll("<", "<");
translateToHTML(text, input, output);
output.format("%s\r\n", "</pre>");
output.format("%s\r\n", "</body>");
output.format("%s\r\n", "</html>");
}
catch (Exception ex) {
System.out.println(ex);
}
finally {
try {
input.close();
output.close();
}
catch (Exception ex) {
}
}
}
