我想在JTable单元格中为文本着色。我使用带有HTML标签的DefaultTableCellRender
为多字词/文字添加颜色。我正在使用Regex查找单词/文本,并通过添加HTML标签来替换它们。
这里的问题是它们自己的HTML标签不应该与正则表达式匹配。
示例:
文本:
This is a example text background
文字到颜色"一个例子":
This is <font color="FFFFFF" style="background-color: #FFAABB">a example</font>
text background
下一个字的颜色&#34;返回&#34;:
This is <font color="FFFFFF" style="background-color: #FFAABB">a example</font>
text <font color="FFFFFF" style="background-color: #AAAAAA">back</font>ground
&#34;返回&#34;不应替换HTML标记中的内容。有没有办法通过Regex排除这个?
代码:
private String color(String val, ArrayList<ColorKeyWord> list) {
for(ColorKeyWord ckw: list){
val = val.replaceAll(ckw.getKeyWord(), "<font color=\"" + DecodedDataHTMLTags.color_white + "\" " +"style=\"background-color: #" + ckw.getColor() + "\">" + ckw.getKeyWord() + "</font>");
}
return val;
}
我认为更简单的解决方案是来自jidesoft的StyledLabel
并使用StyleRange
。但StyledTableCellRenderer
未包含在免费库中。
我也使用JTable
,因为我需要可变的单元格高度。使用swt表无法实现这一点。
答案 0 :(得分:2)
您需要使用更复杂的正则表达式模式来替换(并忽略 html 标记内的关键字)。 “快速而肮脏”的解决方案:
private static String color(String val, String keyword) {
String pattern = "[^>].*(" + keyword + ").*[^<]";
Pattern r = Pattern.compile(pattern);
Matcher m = r.matcher(val);
if (m.find()) {
int startIndex = m.start(1);
int endIndex = m.end(1);
String withReplacedKeyword = val.substring(0, startIndex)
+ "<font color=\"FFFFFF\" style=\"background-color: #FFAABB\">"
+ keyword + "</font>" + val.substring(endIndex);
return withReplacedKeyword;
}
return val;
}
public static void main(String[] args) {
System.out.println(color("This is a example text background", "back"));
System.out.println(color("This is a example text <font color=\"FFFFFF\" style=\"background-color: #FFAABB\">back</font>ground", "back"));
System.out.println(color("This is a example text <font color=\"FFFFFF\" style=\"background-color: #FFAABB\">back</font>ground", "is"));
}
因此第一次替换:
This is a example text
<font color="FFFFFF" style="background-color: #FFAABB">
back
</font>
ground
第二个看起来像嵌套标签(不会破坏GUI组件):
This is a example text
<font color="FFFFFF" style="background-color: #FFAABB">
<font color="FFFFFF" style="background-color: #FFAABB">
back
</font>
</font>
ground
唯一的缺点是一些极端情况(比如在原始字符串的开头替换)可能需要额外的逻辑。为所有这些案例编写通用正则表达式模式可能很费力。
答案 1 :(得分:2)
可能有更好的方法,但基本上,这样做会设置一系列可选组,允许Pattern
和Matcher
将String
分解为“范围”
然后我们使用这些范围来“注入”规则......
String text = "This is a example text background and bunnies are red";
Pattern p = Pattern.compile("(example text)|(back)|(bunnies)|(red)", Pattern.CASE_INSENSITIVE);
Matcher m = p.matcher(text);
List<MatchRange> ranges = new ArrayList<>(25);
while (m.find()) {
ranges.add(new MatchRange(m.start(), m.end()));
}
StringBuilder sb = new StringBuilder(64);
sb.append("<html>");
int anchor = 0;
for (MatchRange range : ranges) {
String before = "";
if (anchor < range.getStart()) {
before = text.substring(anchor, range.getStart());
}
sb.append(before);
System.out.println(range.getStart() + " - " + range.getEnd());
String match = text.substring(range.getStart(), range.getEnd());
// This is where I would have a rule formatter
if (match.equals("example text")) {
sb.append("<font color=\"FFFFFF\" style=\"background-color: #FFAABB\">");
sb.append(match);
sb.append("</font>");
} else if (match.equals("back")) {
sb.append("<font color=\"FFFFFF\" style=\"background-color: #AAAAAA\">");
sb.append(match);
sb.append("</font>");
} else if (match.equals("bunnies")) {
sb.append("<font color=\"FF0000\" style=\"background-color: #FFFFFF\">");
sb.append(match);
sb.append("</font>");
} else if (match.equals("red")) {
sb.append("<font color=\"FF0000\" style=\"background-color: #000000\">");
sb.append(match);
sb.append("</font>");
} else {
sb.append(match);
}
anchor = range.getEnd();
}
System.out.println(sb.toString());
MatchRange
...
public class MatchRange {
private final int start;
private final int end;
public MatchRange(int start, int end) {
this.start = start;
this.end = end;
}
public int getEnd() {
return end;
}
public int getStart() {
return start;
}
}
这基本上是输出
<html>This is a <font color="FFFFFF" style="background-color: #FFAABB">example text</font> <font color="FFFFFF" style="background-color: #AAAAAA">back</font>ground and <font color="FF0000" style="background-color: #FFFFFF">bunnies</font> are <font color="FF0000" style="background-color: #000000">red</font>
我添加了一些额外的测试条件。
我要做的是创建一个可以带有条件("example text"
)的类,它可以格式化值(例如将HTML包裹在它周围)并简单地迭代这些以创建表达式并应用格式
也许像......
public interface ConditionFormatter {
public String getCondition();
public String applyFormatTo(String text);
public boolean matches(String text);
}
public class DefaultConditionFormatter implements ConditionFormatter {
private final String condition;
private final String preFormat;
private final String postFormat;
public DefaultConditionFormatter(String condition, String preFormat, String postFormat) {
this.condition = condition;
this.preFormat = preFormat;
this.postFormat = postFormat;
}
@Override
public String getCondition() {
return condition;
}
@Override
public String applyFormatTo(String text) {
return new StringBuilder(preFormat).append(text).append(postFormat).toString();
}
@Override
public boolean matches(String text) {
return condition.equalsIgnoreCase(text);
}
}
其中包含“条件”或“规则”以及要应用的格式。通常情况下,我可能会试图将“规则”和“格式化程序”分开,但我认为你可以得到基本的想法......
然后你可以做一些像......
List<ConditionFormatter> formatters = new ArrayList<>(25);
formatters.add(new DefaultConditionFormatter("example text", "<font color=\"FFFFFF\" style=\"background-color: #FFAABB\">", "</font>"));
formatters.add(new DefaultConditionFormatter("back", "<font color=\"FFFFFF\" style=\"background-color: #AAAAAA\">", "</font>"));
formatters.add(new DefaultConditionFormatter("bunnies", "<font color=\"FF0000\" style=\"background-color: #FFFFFF\">", "</font>"));
formatters.add(new DefaultConditionFormatter("red", "<font color=\"FF0000\" style=\"background-color: #000000\">", "</font>"));
String text = "This is a example text background and bunnies are red";
StringJoiner sj = new StringJoiner(")|(", "(", ")");
for (ConditionFormatter formatter : formatters) {
sj.add(formatter.getCondition());
}
Pattern p = Pattern.compile(sj.toString(), Pattern.CASE_INSENSITIVE);
//...
和...
for (MatchRange range : ranges) {
//...
// This is where I would have a rule formatter
String match = text.substring(range.getStart(), range.getEnd());
for (ConditionFormatter formatter : formatters) {
if (formatter.matches(match)) {
sb.append(formatter.applyFormatTo(match));
break;
}
}
//...
}
答案 2 :(得分:-1)
尝试 的setColor(BLACK); 在onject上。