private static String txtToHtml(String s) {
StringBuilder builder = new StringBuilder()
boolean previousWasASpace = false
for (char c : s.toCharArray()) {
if (c == ' ') {
if (previousWasASpace) {
builder.append(" ")
previousWasASpace = false
continue
}
previousWasASpace = true
} else {
previousWasASpace = false
}
switch (c) {
case '<':
builder.append("<")
break
case '>':
builder.append(">")
break
case '&':
builder.append("&")
break
case '"':
builder.append(""")
break
case '\n':
builder.append("<br>")
break
// We need Tab support here, because we print StackTraces as HTML
case '\t':
builder.append(" ")
break
default:
builder.append(c)
}
}
String converted = builder.toString()
String str = "(?i)\\b((?:https?://|www\\d{0,3}[.]|[a-z0-9.\\-]+[.][a-z]{2,4}/)(?:[^\\s()<>]+|\\(([^\\s()<>]+|(\\([^\\s()<>]+\\)))*\\))+(?:\\(([^\\s()<>]+|(\\([^\\s()<>]+\\)))*\\)|[^\\s`!()\\[\\]{}:\'\".,<>?«»“”‘’]))"
Pattern patt = Pattern.compile(str)
Matcher matcher = patt.matcher(converted)
converted = matcher.replaceAll("<a href=\"$1\">$1</a>")
return converted
}
import javax.swing.*import java.awt.*
import java.awt.event.*
public class HtmlDemo extends JPanel
implements ActionListener {
JLabel theLabel
JTextArea htmlTextArea
public HtmlDemo() {
setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS))
String initialText = "<html>\n" +
"Color and font test:\n" +
"<ul>\n" +
"<li><font color=red>red</font>\n" +
"<li><font color=blue>blue</font>\n" +
"<li><font color=green>green</font>\n" +
"<li><font size=-2>small</font>\n" +
"<li><font size=+2>large</font>\n" +
"<li><i>italic</i>\n" +
"<li><b>bold</b>\n" +
"</ul>\n"
htmlTextArea = new JTextArea(10, 20)
htmlTextArea.setText(initialText)
JScrollPane scrollPane = new JScrollPane(htmlTextArea)
JButton changeTheLabel = new JButton("Change the label")
changeTheLabel.setMnemonic(KeyEvent.VK_C)
changeTheLabel.setAlignmentX(Component.CENTER_ALIGNMENT)
changeTheLabel.addActionListener(this)
theLabel = new JLabel(initialText) {
public Dimension getPreferredSize() {
return new Dimension(200, 200)
}
public Dimension getMinimumSize() {
return new Dimension(200, 200)
}
public Dimension getMaximumSize() {
return new Dimension(200, 200)
}
}
theLabel.setVerticalAlignment(SwingConstants.CENTER)
theLabel.setHorizontalAlignment(SwingConstants.CENTER)
JPanel leftPanel = new JPanel()
leftPanel.setLayout(new BoxLayout(leftPanel, BoxLayout.PAGE_AXIS))
leftPanel.setBorder(BorderFactory.createCompoundBorder(
BorderFactory.createTitledBorder(
"Edit the HTML, then click the button"),
BorderFactory.createEmptyBorder(10,10,10,10)))
leftPanel.add(scrollPane)
leftPanel.add(Box.createRigidArea(new Dimension(0,10)))
leftPanel.add(changeTheLabel)
JPanel rightPanel = new JPanel()
rightPanel.setLayout(new BoxLayout(rightPanel, BoxLayout.PAGE_AXIS))
rightPanel.setBorder(BorderFactory.createCompoundBorder(
BorderFactory.createTitledBorder("A label with HTML"),
BorderFactory.createEmptyBorder(10,10,10,10)))
rightPanel.add(theLabel)
setBorder(BorderFactory.createEmptyBorder(10,10,10,10))
add(leftPanel)
add(Box.createRigidArea(new Dimension(10,0)))
add(rightPanel)
}
//React to the user pushing the Change button.
public void actionPerformed(ActionEvent e) {
theLabel.setText(htmlTextArea.getText())
}
/**
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event dispatch thread.
*/
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("HtmlDemo")
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
//Add content to the window.
frame.add(new HtmlDemo())
//Display the window.
frame.pack()
frame.setVisible(true)
}
public static void main(String[] args) {
//Schedule a job for the event dispatch thread:
//creating and showing this application's GUI.
SwingUtilities.invokeLater(new Runnable() {
public void run() {
//Turn off metal's use of bold fonts
UIManager.put("swing.boldMetal", Boolean.FALSE)
createAndShowGUI()
}
})
}
}
java的demo，你看看把，没明白你要的是什么东西。
package com/*
* File: WebFormatter.java
* Created on 2005-6-24
* Author: Liao Xuefeng, [email protected]
* Copyright (C) 2005, Liao Xuefeng.
*/
import java.util.*
import java.text.SimpleDateFormat
/**
* Do some format on web display.
*
* @author Xuefeng
*/
public class WebFormatter {
public static String html2text(String html) {
StringBuffer sb = new StringBuffer(html.length())
char[] data = html.toCharArray()
int start = 0
boolean previousIsPre = false
Token token = null
for() {
token = parse(data, start, previousIsPre)
if(token==null)
break
previousIsPre = token.isPreTag()
sb = sb.append(token.getText())
start += token.getLength()
}
return sb.toString()
}
private static Token parse(char[] data, int start, boolean previousIsPre) {
if(start>=data.length)
return null
// try to read next char:
char c = data[start]
if(c=='<') {
// this is a tag or comment or script:
int end_index = indexOf(data, start+1, '>')
if(end_index==(-1)) {
// the left is all text!
return new Token(Token.TOKEN_TEXT, data, start, data.length, previousIsPre)
}
String s = new String(data, start, end_index-start+1)
// now we got s="<...>":
if(s.startsWith("<!--")) { // this is a comment!
int end_comment_index = indexOf(data, start+1, "-->")
if(end_comment_index==(-1)) {
// illegal end, but treat as comment:
return new Token(Token.TOKEN_COMMENT, data, start, data.length, previousIsPre)
}
else
return new Token(Token.TOKEN_COMMENT, data, start, end_comment_index+3, previousIsPre)
}
String s_lowerCase = s.toLowerCase()
if(s_lowerCase.startsWith("<script")) { // this is a script:
int end_script_index = indexOf(data, start+1, "</script>")
if(end_script_index==(-1))
// illegal end, but treat as script:
return new Token(Token.TOKEN_SCRIPT, data, start, data.length, previousIsPre)
else
return new Token(Token.TOKEN_SCRIPT, data, start, end_script_index+9, previousIsPre)
}
else { // this is a tag:
return new Token(Token.TOKEN_TAG, data, start, start+s.length(), previousIsPre)
}
}
// this is a text:
int next_tag_index = indexOf(data, start+1, '<')
if(next_tag_index==(-1))
return new Token(Token.TOKEN_TEXT, data, start, data.length, previousIsPre)
return new Token(Token.TOKEN_TEXT, data, start, next_tag_index, previousIsPre)
}
private static int indexOf(char[] data, int start, String s) {
char[] ss = s.toCharArray()
// TODO: performance can improve!
for(int i=starti<(data.length-ss.length)i++) {
// compare from data[i] with ss[0]:
boolean match = true
for(int j=0j<ss.lengthj++) {
if(data[i+j]!=ss[j]) {
match = false
break
}
}
if(match)
return i
}
return (-1)
}
private static int indexOf(char[] data, int start, char c) {
for(int i=starti<data.lengthi++) {
if(data[i]==c)
return i
}
return (-1)
}
public static void main(String[] args) {
String a = "<div>hahah</div>" +
"<h1><a><img src='/images/ico_close.gif/'/></a>举报</h1>"
WebFormatter web = new WebFormatter()
String ax = WebFormatter.html2text(a)
System.out.println(ax)
}
}
class Token {
public static final int TOKEN_TEXT= 0// html text.
public static final int TOKEN_COMMENT = 1// comment like <!-- comments... -->
public static final int TOKEN_TAG = 2// tag like <pre>, <font>, etc.
public static final int TOKEN_SCRIPT = 3
private static final char[] TAG_BR = "<br".toCharArray()
private static final char[] TAG_P = "<p".toCharArray()
private static final char[] TAG_LI = "<li".toCharArray()
private static final char[] TAG_PRE = "<pre".toCharArray()
private static final char[] TAG_HR = "<hr".toCharArray()
private static final char[] END_TAG_TD = "</td>".toCharArray()
private static final char[] END_TAG_TR = "</tr>".toCharArray()
private static final char[] END_TAG_LI = "</li>".toCharArray()
private static final Map SPECIAL_CHARS = new HashMap()
private int type
private String html // original html
private String text = null // text!
private int length = 0 // html length
private boolean isPre = false// isPre tag?
static {
SPECIAL_CHARS.put(""", "\"")
SPECIAL_CHARS.put("<", "<")
SPECIAL_CHARS.put(">", ">")
SPECIAL_CHARS.put("&", "&")
SPECIAL_CHARS.put("®", "(r)")
SPECIAL_CHARS.put("©", "(c)")
SPECIAL_CHARS.put(" ", " ")
SPECIAL_CHARS.put("£", "?")
}
public Token(int type, char[] data, int start, int end, boolean previousIsPre) {
this.type = type
this.length = end - start
this.html = new String(data, start, length)
//TODO 打印html text
// System.out.println("[Token] html=" + html + ".")
parseText(previousIsPre)
// System.out.println("[Token] text=" + text + ".")
}
public int getLength() {
return length
}
public boolean isPreTag() {
return isPre
}
private void parseText(boolean previousIsPre) {
if(type==TOKEN_TAG) {
char[] cs = html.toCharArray()
if(compareTag(TAG_BR, cs) || compareTag(TAG_P, cs))
text = "\n"
else if(compareTag(TAG_LI, cs))
text = "\n* "
else if(compareTag(TAG_PRE, cs))
isPre = true
else if(compareTag(TAG_HR, cs))
text = "\n--------\n"
else if(compareString(END_TAG_TD, cs))
text = "\t"
else if(compareString(END_TAG_TR, cs) || compareString(END_TAG_LI, cs))
text = "\n"
}
// text token:
else if(type==TOKEN_TEXT) {
text = toText(html, previousIsPre)
}
}
public String getText() {
return text==null ? "" : text
}
private String toText(String html, final boolean isPre) {
char[] cs = html.toCharArray()
StringBuffer buffer = new StringBuffer(cs.length)
int start = 0
boolean continueSpace = false
char current, next
for() {
if(start>=cs.length)
break
current = cs[start]// read current char
if(start+1<cs.length) // and next char
next = cs[start+1]
else
next = '\0'
if(current==' ') {
if(isPre || !continueSpace)
buffer = buffer.append(' ')
continueSpace = true
// continue loop:
start++
continue
}
// not ' ', so:
if(current=='\r' &&next=='\n') {
if(isPre)
buffer = buffer.append('\n')
// continue loop:
start+=2
continue
}
if(current=='\n' || current=='\r') {
if(isPre)
buffer = buffer.append('\n')
// continue loop:
start++
continue
}
// cannot continue space:
continueSpace = false
if(current=='&') {
// maybe special char:
int length = readUtil(cs, start, '', 10)
if(length==(-1)) { // just '&':
buffer = buffer.append('&')
// continue loop:
start++
continue
}
else { // check if special character:
String spec = new String(cs, start, length)
String specChar = (String)SPECIAL_CHARS.get(spec)
if(specChar!=null) { // special chars!
buffer = buffer.append(specChar)
// continue loop:
start+=length
continue
}
else { // check if like 'Ӓ':
if(next=='#') { // maybe a char
String num = new String(cs, start+2, length-3)
try {
int code = Integer.parseInt(num)
if(code>0 &&code<65536) { // this is a special char:
buffer = buffer.append((char)code)
// continue loop:
start++
continue
}
}
catch(Exception e) {}
// just normal char:
buffer = buffer.append("")
// continue loop:
start+=2
continue
}
else { // just '&':
buffer = buffer.append('&')
// continue loop:
start++
continue
}
}
}
}
else { // just a normal char!
buffer = buffer.append(current)
// continue loop:
start++
continue
}
}
return buffer.toString()
}
// read from cs[start] util meet the specified char 'util',
// or null if not found:
private int readUtil(final char[] cs, final int start, final char util, final int maxLength) {
int end = start+maxLength
if(end>cs.length)
end = cs.length
for(int i=starti<start+maxLengthi++) {
if(cs[i]==util) {
return i-start+1
}
}
return (-1)
}
// compare standard tag "<input" with tag "<INPUT value=aa>"
private boolean compareTag(final char[] ori_tag, char[] tag) {
if(ori_tag.length>=tag.length)
return false
for(int i=0i<ori_tag.lengthi++) {
if(Character.toLowerCase(tag[i])!=ori_tag[i])
return false
}
// the following char should not be a-z:
if(tag.length>ori_tag.length) {
char c = Character.toLowerCase(tag[ori_tag.length])
if(c<'a' || c>'z')
return true
return false
}
return true
}
private boolean compareString(final char[] ori, char[] comp) {
if(ori.length>comp.length)
return false
for(int i=0i<ori.lengthi++) {
if(Character.toLowerCase(comp[i])!=ori[i])
return false
}
return true
}
public String toString() {
return html
}
}
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