无效的转义序列(有效的是\ b \ t \ n \ f \ r \“ \'\):
private final String doGetHtmlStringPartThree = "<td><input type=\"radio\" name=\"userInput\" value=\"\d.+\">\d / \d</td>";
双逃逸被接受:
private final String doGetHtmlStringPartThree = "<td><input type=\"radio\" name=\"userInput\" value=\"\\d.+\">\\d / \\d</td>";
测试
private final String doGetHtmlStringPartOne = "<html><body><table>"
+ "<tr><td><h1>";
private final String doGetHtmlStringPartTwo = "</h1></td>"
+ "<form method=\"post\">"
+ "<input type=\"hidden\" name=\"randomDigitRange\" value=\"1\" />"
+ "<input type=\"hidden\" name=\"randomMathematicalOperator\""
+ " value=\"1\" /><input type=\"hidden\" name=\"fractionBoolean\""
+ " value=\"";
private final String doGetHtmlStringPartThree = "<td><input type=\"radio\" name=\"userInput\" value=\"\\d.+\">[0-9] / \\d</td>";
private final String doGetHtmlStringPartFour = "</tr><tr><td>"
+ "<input type=\"submit\" value=\"Submit\" "
+ "onclick='this.form.action=\"ToBeDefinedServlet\";' />"
+ "</td></tr></table></form></body></html>"
+ "<form action=\"/tobedefinedservlet\">"
+ "<input type=\"submit\" value=\"Home\"></form>";
@Test
public void testBooleanFractionTrue() throws IOException, ServletException {
mockDoGet();
assertEquals(expectedDoGetHtmlString("1 / 1 + 1 / 1", true),
stringWriter.getBuffer().toString().trim());
}
public String expectedDoGetHtmlString(String assignment,
Boolean fractionBoolean) {
return doGetHtmlStringPartOne + assignment + doGetHtmlStringPartTwo
+ "" + fractionBoolean + "" + "\" />" + "\n"
+ doGetHtmlStringPartThree + "\n" + doGetHtmlStringPartFour;
}
正则表达式不起作用:
问题
如何使用正则表达式在servlet中测试字符串?
<td><input type="radio" name="userInput" value="(\d)+.(\d)+">(\d)+( ?\/? ?)(\d)+<\/td>
我认为这是您正在寻找的正则表达式。您没有给我们提供任何示例来测试正则表达式。您当然需要对Java中的字符进行转义。
这是在Java中使用它来匹配字符串的示例:
public static void main(String[] args) throws Exception {
String regex = "<td><input type=\"radio\" name=\"userInput\" value=\"(\\d)+.(\\d)+\">(\\d)+( ?\\/? ?)(\\d)+<\\/td>";
String test = "<td><input type=\"radio\" name=\"userInput\" value=\"1.1\">112/2</td>";
System.out.println("Does: " + test);
System.out.println("Match: the regex pattern: " + regex);
System.out.println("Answer: " + test.matches(regex));
}
这给了我输出:
Does: <td><input type="radio" name="userInput" value="1.1">112/2</td>
Match: the regex pattern: <td><input type="radio" name="userInput" value="(\d)+.(\d)+">(\d)+( ?\/? ?)(\d)+<\/td>
Answer: true
假设您尝试使用测试库(如JUnit),则可以使用这些assertTrue(boolean)
方法。从上面的示例中,您可以使用:
assertTrue(test.matches(regex));
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