{"id":1974,"date":"2023-04-01T10:38:44","date_gmt":"2023-04-01T02:38:44","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=1974"},"modified":"2023-04-22T08:31:07","modified_gmt":"2023-04-22T00:31:07","slug":"spring-boot-add-additional-parameters-to-request-in-filter","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/04\/01\/spring-boot-add-additional-parameters-to-request-in-filter\/","title":{"rendered":"Spring Boot\u5411Filter\u8fc7\u6ee4\u5668\u4e2d\u7684Request\u5bf9\u8c61\u6dfb\u52a0\u989d\u5916\u7684\u53c2\u6570"},"content":{"rendered":"<p>\u6709\u65f6\u5019\u6211\u4eec\u4f1a\u9047\u5230\u8fd9\u4e48\u4e00\u4e9b\u9700\u6c42\uff0c\u5728Filter\u4e2d\u83b7\u53d6\u4e00\u4e9b\u53c2\u6570\u8fdb\u884c\u5904\u7406\uff0c\u540c\u65f6\u5c06\u5904\u7406\u597d\u7684\u53c2\u6570\u91cd\u65b0\u6dfb\u52a0\u5230Request\u5bf9\u8c61\u4e2d\uff0c\u8fd9\u65f6\u5019\u6211\u4eec\u5728Filter\u4e2d\u76f4\u63a5\u4f7f\u7528<code>request.setAttribute()<\/code>\u662f\u65e0\u6548\u7684\u3002\u53ef\u4ee5\u4f7f\u7528<code>HttpServletRequestWrapper<\/code>\u7c7b\u6765\u89e3\u51b3\u5411Request\u6dfb\u52a0\u989d\u5916\u53c2\u6570\u7684\u529f\u80fd\u3002<\/p>\n<h2>\u81ea\u5b9a\u4e49HttpServletRequestWrapper\u7c7b<\/h2>\n<p><!-- more --><\/p>\n<pre><code class=\"language-java\">import javax.servlet.http.HttpServletRequest;\nimport javax.servlet.http.HttpServletRequestWrapper;\nimport java.util.HashMap;\nimport java.util.Map;\n\n\/**\n * @author yezhou\n *\/\npublic class RequestParameterWrapper extends HttpServletRequestWrapper {\n\n    private Map&lt;String, String[]&gt; params = new HashMap&lt;String, String[]&gt;();\n\n    public RequestParameterWrapper(HttpServletRequest request) {\n        super(request);\n        \/\/\u5c06\u73b0\u6709parameter\u4f20\u9012\u7ed9params\n        this.params.putAll(request.getParameterMap());\n    }\n\n    @Override\n    public Map&lt;String, String[]&gt; getParameterMap() {\n        return params;\n    }\n\n    \/**\n     * \u91cd\u8f7d\u6784\u9020\u51fd\u6570\n     * @param request\n     * @param extraParams\n     *\/\n    public RequestParameterWrapper(HttpServletRequest request, Map&lt;String, Object&gt; extraParams) {\n        this(request);\n        addParameters(extraParams);\n    }\n\n    public void addParameters(Map&lt;String, Object&gt; extraParams) {\n        for (Map.Entry&lt;String, Object&gt; entry : extraParams.entrySet()) {\n            addParameter(entry.getKey(), entry.getValue());\n        }\n    }\n\n    \/**\n     * \u91cd\u5199getParameter\uff0c\u4ee3\u8868\u53c2\u6570\u4ece\u5f53\u524d\u7c7b\u4e2d\u7684map\u83b7\u53d6\n     * @param name\n     * @return\n     *\/\n    @Override\n    public String getParameter(String name) {\n        String[]values = params.get(name);\n        if(values == null || values.length == 0) {\n            return null;\n        }\n        return values[0];\n    }\n\n    \/**\n     * \u540c\u4e0a\n     * @param name\n     * @return\n     *\/\n    @Override\n    public String[] getParameterValues(String name) {\n        return params.get(name);\n    }\n\n    \/**\n     * \u6dfb\u52a0\u53c2\u6570\n     * @param name\n     * @param value\n     *\/\n    public void addParameter(String name, Object value) {\n        if (!params.containsKey(name) &amp;&amp; value != null) {\n            if (value instanceof String[]) {\n                params.put(name, (String[]) value);\n            } else if (value instanceof String) {\n                params.put(name, new String[]{(String) value});\n            } else {\n                params.put(name, new String[]{String.valueOf(value)});\n            }\n        }\n    }\n}<\/code><\/pre>\n<h2>\u6dfb\u52a0\u81ea\u5b9a\u4e49\u53c2\u6570<\/h2>\n<p>\u6211\u4eec\u5b9e\u73b0\u4e00\u4e2aFilter\uff0c\u8fd9\u4e2aFilter\u5b9e\u73b0\u4e00\u4e2a\u529f\u80fd\uff0c\u83b7\u53d6\u7528\u6237\u6d4f\u89c8\u5668\u6240\u8bbf\u95ee\u7684\u57df\u540d\uff0c\u5e76\u4e14\u5c06\u7528\u6237\u8bbf\u95ee\u7684\u57df\u540d\u6784\u5efa\u4e3a\u4e00\u4e2a\u65b0\u7684\u53c2\u6570\u6dfb\u52a0\u5230Request\u5bf9\u8c61\u4e2d\u53bb\u3002<\/p>\n<pre><code class=\"language-java\">import lombok.extern.slf4j.Slf4j;\nimport org.springframework.security.crypto.keygen.Base64StringKeyGenerator;\nimport org.springframework.security.crypto.keygen.StringKeyGenerator;\n\nimport javax.servlet.*;\nimport javax.servlet.http.HttpServletRequest;\nimport java.io.IOException;\nimport java.util.Base64;\nimport java.util.HashMap;\nimport java.util.Map;\n\n\/**\n * @author yezhou\n *\/\n@Slf4j\npublic class RequestFilter implements Filter {\n\n    @Override\n    public void init(FilterConfig filterConfig) throws ServletException {\n\n    }\n\n    @Override\n    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)\n            throws IOException, ServletException {\n        HttpServletRequest httpRequest = (HttpServletRequest) servletRequest;\n        log.info(httpRequest.getQueryString());\n\n        String dn = request.getServerName();\n        Map&lt;String, Object&gt; extraParams = new HashMap&lt;String, Object&gt;();\n        extraParams.put(&quot;dn&quot;, dn);\n        \/\/\u5229\u7528\u539f\u59cb\u7684request\u5bf9\u8c61\u521b\u5efa\u81ea\u5df1\u6269\u5c55\u7684request\u5bf9\u8c61\u5e76\u6dfb\u52a0\u81ea\u5b9a\u4e49\u53c2\u6570\n        RequestParameterWrapper requestParameterWrapper = new RequestParameterWrapper(httpRequest);\n        requestParameterWrapper.addParameters(extraParams);\n\n        filterChain.doFilter(requestParameterWrapper, servletResponse);\n    }\n\n    @Override\n    public void destroy() {\n\n    }\n}<\/code><\/pre>\n<h2>Spring Boot\u914d\u7f6eFilter<\/h2>\n<p>\u5728\u5b8c\u6210\u6dfb\u52a0\u81ea\u5b9a\u4e49\u53c2\u6570\u4e4b\u540e\u5c31\u9700\u8981\u5728Spring Boot\u914d\u7f6e\u6211\u4eec\u5b9a\u4e49Filter\uff0c\u5177\u4f53\u4ee3\u7801\u5982\u4e0b<\/p>\n<pre><code class=\"language-java\">import cn.appblog.mall.common.filter.RequestFilter;\nimport org.springframework.boot.builder.SpringApplicationBuilder;\nimport org.springframework.boot.web.servlet.FilterRegistrationBean;\nimport org.springframework.boot.web.servlet.ServletComponentScan;\nimport org.springframework.boot.web.support.SpringBootServletInitializer;\nimport org.springframework.context.annotation.Bean;\nimport org.springframework.context.annotation.Configuration;\n\nimport javax.servlet.Filter;\n\n@Configuration\n@ServletComponentScan\npublic class ServletInitializer extends SpringBootServletInitializer {\n\n    @Override\n    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {\n        return application.sources(Myp2cMainApplication.class);\n    }\n\n    @Bean\n    public FilterRegistrationBean contextFilterRegistrationBean() {\n        FilterRegistrationBean registrationBean = new FilterRegistrationBean();\n        registrationBean.setFilter(requestFilter());\n        registrationBean.addUrlPatterns(&quot;\/&quot;);\n        registrationBean.setName(&quot;requestFilter&quot;);\n        registrationBean.setOrder(1);\n        return registrationBean;\n    }\n\n    @Bean\n    public Filter requestFilter() {\n        return new RequestFilter();\n    }\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u6709\u65f6\u5019\u6211\u4eec\u4f1a\u9047\u5230\u8fd9\u4e48\u4e00\u4e9b\u9700\u6c42\uff0c\u5728Filter\u4e2d\u83b7\u53d6\u4e00\u4e9b\u53c2\u6570\u8fdb\u884c\u5904\u7406\uff0c\u540c\u65f6\u5c06\u5904\u7406\u597d\u7684\u53c2\u6570\u91cd\u65b0\u6dfb\u52a0\u5230Request [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[41],"tags":[],"class_list":["post-1974","post","type-post","status-publish","format-standard","hentry","category-spring-boot"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1974","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1974"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1974\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1974"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1974"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1974"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}