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我怎样才能在带有注释映射的 Spring MVC 中使用不区分大小写的 URLS

[英]How can I have case insensitive URLS in Spring MVC with annotated mappings

我已经通过我的 spring mvc web 应用程序对映射进行了很好的注释,但是,它们区分大小写。 我找不到使它们不区分大小写的方法。 (我很乐意在 Spring MVC 中实现这一点,而不是以某种方式重定向流量)

Spring 4.2 将支持不区分大小写的路径匹配。 您可以按如下方式配置它:

@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {
    @Override
    public void configurePathMatch(PathMatchConfigurer configurer) {
        AntPathMatcher matcher = new AntPathMatcher();
        matcher.setCaseSensitive(false);
        configurer.setPathMatcher(matcher);
    }
}

根据this webpost,您需要在Spring MVC中同时添加一个HandlerMapping和一个HandlerAdapter Mapping 将请求映射到相应的控制器,适配器负责使用控制器执行请求。

因此,您需要覆盖映射器和适配器的PathMatcher

Ex(将使所有@Controllers 不区分大小写):

新匹配器:

public class CaseInsenseticePathMatcher extends AntPathMatcher {
    @Override
    protected boolean doMatch(String pattern, String path, boolean fullMatch, Map<String, String> uriTemplateVariables) {
        System.err.println(pattern + " -- " + path);
        return super.doMatch(pattern.toLowerCase(), path.toLowerCase(), fullMatch, uriTemplateVariables);
    }
}

应用上下文.xml:

<bean id="matcher" class="test.CaseInsenseticePathMatcher"/>

<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
    <property name="pathMatcher" ref="matcher"/>
</bean>

<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
    <property name="pathMatcher" ref="matcher"/>
    <property name="webBindingInitializer">
        <bean class="org.springframework.web.bind.support.ConfigurableWebBindingInitializer"/>
    </property>
    <property name="messageConverters">
        <list>
            <bean class="org.springframework.http.converter.ByteArrayHttpMessageConverter"/>
            <bean class="org.springframework.http.converter.StringHttpMessageConverter"/>
            <bean class="org.springframework.http.converter.FormHttpMessageConverter"/>
            <bean class="org.springframework.http.converter.xml.SourceHttpMessageConverter"/>
        </list>
    </property>
</bean>

<bean id="conversion-service" class="org.springframework.format.support.FormattingConversionServiceFactoryBean"/>

添加了与 < mvc:annotation-driven > 相同的内容。 (感谢大卫帕克斯的链接)

在 Spring 3.2+ / Spring Boot 中,您现在可以使用简化的 Java 配置设置不区分大小写的 URL 匹配。

首先,您需要创建 CaseInsensitivePathMatcher.groovy 或 Java 类:

import org.springframework.util.AntPathMatcher

class CaseInsensitivePathMatcher extends AntPathMatcher{

    @Override
    protected boolean doMatch(String pattern, String path, boolean fullMatch, Map<String, String> uriTemplateVariables) {
        super.doMatch(pattern.toLowerCase(), path.toLowerCase(), fullMatch, uriTemplateVariables)
    }
}

接下来,要实现这一点,您应该有一个用 Springs @Configuration 注释的类,它扩展了 WebMvcConfigurerAdapter 类,如下所示(请注意,我的代码包含在 .groovy 类中,因此示例中不需要 'return' 关键字) :

@Configuration
public class ApplicationConfig extends WebMvcConfigurerAdapter

然后将以下2个方法添加到类中:

/**
 * Creates a patchMatcher bean that matches case insensitively
 * @return PathMatcher
 */
@Bean
public PathMatcher pathMatcher() {
    new CaseInsensitivePathMatcher()
}

/**
 * Overrides the configurePathMatch() method in WebMvcConfigurerAdapter
 * <br/>Allows us to set a custom path matcher, used by the MVC for @RequestMapping's
     * @param configurer
     */
    @Override
    public void configurePathMatch(PathMatchConfigurer configurer) {
        configurer.pathMatcher = pathMatcher()
    }
}


就是这样,您现在应该以最少的配置为不区分大小写的 URL 进行所有设置

Spring 因为版本 5.3 默认不再使用 PathMatcher,而是使用PathPatternMatcher 要配置 PathPatternMatcher,请执行以下操作:

@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {
    @Override
    public void configurePathMatch(PathMatchConfigurer configurer) {
        PathPatternParser patternParser = new PathPatternParser();
        patternParser.setCaseSensitive(false);
        configurer.setPatternParser(patternParser);
    }
}

smat解决问题报告


smat 的解决方案中,有一个小的副作用(我会为此归咎于 spring-mvc)。

起初, AntPathMatcher.doMatch()似乎根据requested-url 和controller-method 的request-mapping 字符串返回true/false(这是这里唯一应该做的事情)。 但是,这种方法也用于另一个目的(它没有写在文档中!)。 另一个目的是在控制器方法中收集@PathVariable相应值。 这些值收集在Map<String, String> uriTemplateVariables (最后一个参数)中。这些收集的值用于传递给控制器​​方法作为参数值。

例如,我们有这样的控制器方法,

@RequestMapping("/code/{userCode}")
public String getCode(@PathVariable("userCode") String userCode) {
    System.out.println(userCode);
}

如果我们用URL访问, /code/AbD然后用由SMAT溶液AntPathMatcher.doMatch()将收集@PathVariable在值Map<String, String> uriTemplateVariables作为userCode->abd 由于我们将路径字符串小写,因此收集的值也是小写的。 并将这个小写的 userCode 值传递给我们的控制器

但是,我很感谢smat 的解决方案,到目前为止,它对我很好,没有任何其他问题。


解决方案


通过 smat 解决解决方案解决了这个问题。 在扩展的AntPathMatcher类中没有小写路径或模式字符串,我强制我的扩展AntPathMatcher使用我的自定义AntPathStringMatcher 我的自定义AntPathStringMatcher在不改变实际字符串大小写的情况下AntPathStringMatcher不区分大小写的匹配。

在以下解决方案代码中,大部分代码是从原始类代码复制的(由于私有访问,我想自定义的代码对于子类隐藏了)。

自定义 AntPathMatcher,

public class CaseInsensitivePathMatcher extends AntPathMatcher {

private final Map<String, CaseInsensitiveAntPathStringMatcher> stringMatcherCache = new ConcurrentHashMap<String, CaseInsensitiveAntPathStringMatcher>();

/**
 * Actually match the given <code>path</code> against the given
 * <code>pattern</code>.
 * 
 * @param pattern
 *            the pattern to match against
 * @param path
 *            the path String to test
 * @param fullMatch
 *            whether a full pattern match is required (else a pattern match
 *            as far as the given base path goes is sufficient)
 * @return <code>true</code> if the supplied <code>path</code> matched,
 *         <code>false</code> if it didn't
 */
protected boolean doMatch(String pattern, String path, boolean fullMatch, Map<String, String> uriTemplateVariables) {

    if (path.startsWith(AntPathMatcher.DEFAULT_PATH_SEPARATOR) != pattern.startsWith(AntPathMatcher.DEFAULT_PATH_SEPARATOR)) {
        return false;
    }

    String[] pattDirs = StringUtils.tokenizeToStringArray(pattern, AntPathMatcher.DEFAULT_PATH_SEPARATOR);
    String[] pathDirs = StringUtils.tokenizeToStringArray(path, AntPathMatcher.DEFAULT_PATH_SEPARATOR);

    int pattIdxStart = 0;
    int pattIdxEnd = pattDirs.length - 1;
    int pathIdxStart = 0;
    int pathIdxEnd = pathDirs.length - 1;

    // Match all elements up to the first **
    while (pattIdxStart <= pattIdxEnd && pathIdxStart <= pathIdxEnd) {
        String patDir = pattDirs[pattIdxStart];
        if ("**".equals(patDir)) {
            break;
        }
        if (!matchStrings(patDir, pathDirs[pathIdxStart], uriTemplateVariables)) {
            return false;
        }
        pattIdxStart++;
        pathIdxStart++;
    }

    if (pathIdxStart > pathIdxEnd) {
        // Path is exhausted, only match if rest of pattern is * or **'s
        if (pattIdxStart > pattIdxEnd) {
            return (pattern.endsWith(AntPathMatcher.DEFAULT_PATH_SEPARATOR) ? path.endsWith(AntPathMatcher.DEFAULT_PATH_SEPARATOR) : !path
                    .endsWith(AntPathMatcher.DEFAULT_PATH_SEPARATOR));
        }
        if (!fullMatch) {
            return true;
        }
        if (pattIdxStart == pattIdxEnd && pattDirs[pattIdxStart].equals("*") && path.endsWith(AntPathMatcher.DEFAULT_PATH_SEPARATOR)) {
            return true;
        }
        for (int i = pattIdxStart; i <= pattIdxEnd; i++) {
            if (!pattDirs[i].equals("**")) {
                return false;
            }
        }
        return true;
    } else if (pattIdxStart > pattIdxEnd) {
        // String not exhausted, but pattern is. Failure.
        return false;
    } else if (!fullMatch && "**".equals(pattDirs[pattIdxStart])) {
        // Path start definitely matches due to "**" part in pattern.
        return true;
    }

    // up to last '**'
    while (pattIdxStart <= pattIdxEnd && pathIdxStart <= pathIdxEnd) {
        String patDir = pattDirs[pattIdxEnd];
        if (patDir.equals("**")) {
            break;
        }
        if (!matchStrings(patDir, pathDirs[pathIdxEnd], uriTemplateVariables)) {
            return false;
        }
        pattIdxEnd--;
        pathIdxEnd--;
    }
    if (pathIdxStart > pathIdxEnd) {
        // String is exhausted
        for (int i = pattIdxStart; i <= pattIdxEnd; i++) {
            if (!pattDirs[i].equals("**")) {
                return false;
            }
        }
        return true;
    }

    while (pattIdxStart != pattIdxEnd && pathIdxStart <= pathIdxEnd) {
        int patIdxTmp = -1;
        for (int i = pattIdxStart + 1; i <= pattIdxEnd; i++) {
            if (pattDirs[i].equals("**")) {
                patIdxTmp = i;
                break;
            }
        }
        if (patIdxTmp == pattIdxStart + 1) {
            // '**/**' situation, so skip one
            pattIdxStart++;
            continue;
        }
        // Find the pattern between padIdxStart & padIdxTmp in str between
        // strIdxStart & strIdxEnd
        int patLength = (patIdxTmp - pattIdxStart - 1);
        int strLength = (pathIdxEnd - pathIdxStart + 1);
        int foundIdx = -1;

        strLoop: for (int i = 0; i <= strLength - patLength; i++) {
            for (int j = 0; j < patLength; j++) {
                String subPat = pattDirs[pattIdxStart + j + 1];
                String subStr = pathDirs[pathIdxStart + i + j];
                if (!matchStrings(subPat, subStr, uriTemplateVariables)) {
                    continue strLoop;
                }
            }
            foundIdx = pathIdxStart + i;
            break;
        }

        if (foundIdx == -1) {
            return false;
        }

        pattIdxStart = patIdxTmp;
        pathIdxStart = foundIdx + patLength;
    }

    for (int i = pattIdxStart; i <= pattIdxEnd; i++) {
        if (!pattDirs[i].equals("**")) {
            return false;
        }
    }

    return true;
}

/**
 * Tests whether or not a string matches against a pattern. The pattern may
 * contain two special characters:<br>
 * '*' means zero or more characters<br>
 * '?' means one and only one character
 * 
 * @param pattern
 *            pattern to match against. Must not be <code>null</code>.
 * @param str
 *            string which must be matched against the pattern. Must not be
 *            <code>null</code>.
 * @return <code>true</code> if the string matches against the pattern, or
 *         <code>false</code> otherwise.
 */
private boolean matchStrings(String pattern, String str, Map<String, String> uriTemplateVariables) {
    CaseInsensitiveAntPathStringMatcher matcher = this.stringMatcherCache.get(pattern);
    if (matcher == null) {
        matcher = new CaseInsensitiveAntPathStringMatcher(pattern);
        this.stringMatcherCache.put(pattern, matcher);
    }
    return matcher.matchStrings(str, uriTemplateVariables);
}

}

自定义 AntPathStringMatcher,

public class CaseInsensitiveAntPathStringMatcher {
private static final Pattern GLOB_PATTERN = Pattern.compile("\\?|\\*|\\{((?:\\{[^/]+?\\}|[^/{}]|\\\\[{}])+?)\\}");

private static final String DEFAULT_VARIABLE_PATTERN = "(.*)";

private final Pattern pattern;

private final List<String> variableNames = new LinkedList<String>();


/** Construct a new instance of the <code>AntPatchStringMatcher</code>. */
CaseInsensitiveAntPathStringMatcher(String pattern) {
    this.pattern = createPattern(pattern);
}

private Pattern createPattern(String pattern) {
    StringBuilder patternBuilder = new StringBuilder();
    Matcher m = GLOB_PATTERN.matcher(pattern);
    int end = 0;
    while (m.find()) {
        patternBuilder.append(quote(pattern, end, m.start()));
        String match = m.group();
        if ("?".equals(match)) {
            patternBuilder.append('.');
        }
        else if ("*".equals(match)) {
            patternBuilder.append(".*");
        }
        else if (match.startsWith("{") && match.endsWith("}")) {
            int colonIdx = match.indexOf(':');
            if (colonIdx == -1) {
                patternBuilder.append(DEFAULT_VARIABLE_PATTERN);
                variableNames.add(m.group(1));
            }
            else {
                String variablePattern = match.substring(colonIdx + 1, match.length() - 1);
                patternBuilder.append('(');
                patternBuilder.append(variablePattern);
                patternBuilder.append(')');
                String variableName = match.substring(1, colonIdx);
                variableNames.add(variableName);
            }
        }
        end = m.end();
    }
    patternBuilder.append(quote(pattern, end, pattern.length()));
    return Pattern.compile(patternBuilder.toString(), Pattern.CASE_INSENSITIVE);    // this line is updated to create case-insensitive pattern object
}

private String quote(String s, int start, int end) {
    if (start == end) {
        return "";
    }
    return Pattern.quote(s.substring(start, end));
}

/**
 * Main entry point.
 *
 * @return <code>true</code> if the string matches against the pattern, or <code>false</code> otherwise.
 */
public boolean matchStrings(String str, Map<String, String> uriTemplateVariables) {
    Matcher matcher = pattern.matcher(str);
    if (matcher.matches()) {
        if (uriTemplateVariables != null) {
            // SPR-8455
            Assert.isTrue(variableNames.size() == matcher.groupCount(),
                    "The number of capturing groups in the pattern segment " + pattern +
                    " does not match the number of URI template variables it defines, which can occur if " +
                    " capturing groups are used in a URI template regex. Use non-capturing groups instead.");
            for (int i = 1; i <= matcher.groupCount(); i++) {
                String name = this.variableNames.get(i - 1);
                String value = matcher.group(i);
                uriTemplateVariables.put(name, value);
            }
        }
        return true;
    }
    else {
        return false;
    }
}

Spring 4.2 中 bean 文件的示例,仅支持 v4.2+:

<mvc:annotation-driven validator="validator">
   <mvc:path-matching path-matcher="pathMatcher" />
</mvc:annotation-driven>

...

<!--Set endpoints case insensitive, spring is case-sensitive by default-->
<bean id="pathMatcher" class="org.springframework.util.AntPathMatcher">
  <property name="caseSensitive" value="false" />
</bean>

好吧,我无法回答你的问题(我试过了,我想我能弄明白)。 但是看到您在 2 天内没有收到任何回复,这里至少有一些线索:

这个例子似乎表明这是可能的:

http://webcache.googleusercontent.com/search?q=cache:ELj-ZQ8G4z0J:www.springbyexample.org/examples/sdms-simple-spring-mvc-web-module.html+case+insensitive+requestmapping+spring&cd= 3&hl=en&ct=clnk&client=firefox-a

它在 Spring 中引用了这个类

http://static.springsource.org/spring/docs/3.0.4.RELEASE/javadoc-api/org/springframework/web/servlet/mvc/support/ControllerClassNameHandlerMapping.html

我的猜测(而且只是猜测)是您需要扩展<mvc:annotation-driven/>并使用正确的参数实现各个 bean 以使其不区分大小写。 看:

http://rapid-web.tumblr.com/post/296916668/what-does-annotation-driven-do

最后一点,我在阅读的其他地方注意到它说所有路径默认为小写,您是否确认/MyPath不是由@RequestMapping("/mypath")

再一次,我能做的就是最好的思考。 也许它会让你走得足够远,去问一个更具体的问题,引导你找到答案——这就是这些事情有时是如何运作的。 祝你好运!

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