yige.org 试一个

<!DOCTYPE html>
<html>
<head>
<style> 
p.test1
{
width:11em; 
border:1px solid #000000;
word-break:hyphenate;
}

p.test2
{
width:11em; 
border:1px solid #000000;
word-break:break-all;
}
</style>
</head>
<body>

<p class="test1">This is a veryveryveryveryveryveryveryveryveryvery long paragraph.</p>
<p class="test2">This is a veryveryveryveryveryveryveryveryveryvery long paragraph.</p>

<p><b>注释：</b>目前 Opera 不支持 word-break 属性。</p>

</body>
</html>

结果:

编辑上面的代码，点击查看结果。

yige.org - 试一个