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tomcat 报错： A child container failed during start 解决方法 错误详情涓ラ��: A child container failed during start java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext[]] at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:800) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) at java.base/java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:264) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at java.base/java.lang.Thread.run(Thread.java:834) Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext[]] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) ... 7 more Caused by: java.lang.LinkageError: loader constraint violation: loader org.apache.catalina.loader.WebappClassLoader @53e582eb (instance of org.apache.catalina.loader.WebappClassLoader, child of org.codehaus.plexus.classworlds.realm.ClassRealm @257e0827 org.codehaus.plexus.classworlds.realm.ClassRealm) wants to load interface javax.servlet.ServletContext. A different interface with the same name was previously loaded by org.codehaus.plexus.classworlds.realm.ClassRealm @257e0827 (instance of org.codehaus.plexus.classworlds.realm.ClassRealm, child of 'bootstrap'). at java.base/java.lang.ClassLoader.defineClass1(Native Method) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016) at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174) at java.base/java.net.URLClassLoader.defineClass(URLClassLoader.java:550) at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:458) at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:452) at java.base/java.security.AccessController.doPrivileged(Native Method) at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:451) at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1191) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1669) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547) at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:165) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5423) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 7 more 12�� 19, 2019 3:20:08 涓��� org.apache.catalina.core.ContainerBase startInternal 涓ラ��: A child container failed during start java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]] at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123) at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.startup.Tomcat.start(Tomcat.java:341) at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.startContainer(AbstractRunMojo.java:1238) at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.execute(AbstractRunMojo.java:592) at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:154) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:146) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81) at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51) at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:309) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:194) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:107) at org.apache.maven.cli.MavenCli.execute(MavenCli.java:955) at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:290) at org.apache.maven.cli.MavenCli.main(MavenCli.java:194) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289) at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229) at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415) at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356) at org.codehaus.classworlds.Launcher.main(Launcher.java:47) Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) at java.base/java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:264) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at java.base/java.lang.Thread.run(Thread.java:834) Caused by: org.apache.catalina.LifecycleException: A child container failed during start at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:800) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 7 more 解决方法pom.xml文件中servlet-api和jsp-api的坐标中缺少scope，加载<scrop>就可以 <!--servlet和jsp--> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.0</version> <scope>provided</scope> </dependency> -
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解决idea maven配置了Tomcat却在插件窗口不显示的问题 **注意看plugins标签所在的位置plugin的父标签plugins 可以直接放在build标签下也可以放在pluginManagement标签下而我们在创建maven项目的时候 默认存在的那个plugins标签是在pluginManagement标签下的而pluginManagement标签只是对插件的一种声明 而不会对插件进行加载所以解决办法如下：我们要在build标签下再写一个plugins标签然后再把plugin标签放进去下面是完整的pom.xml文件**<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.example</groupId> <artifactId>hello_web2</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <name>hello_web2 Maven Webapp</name> <!-- FIXME change it to the project's website --> <url>http://www.example.com</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>test</scope> </dependency> </dependencies> <build> <finalName>hello_web2</finalName> <plugins> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.2</version> <configuration> <!--配置端口号--> <port>80</port> <!--配置项目路径--> <path>/</path> </configuration> </plugin> </plugins> <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) --> <plugins> <plugin> <artifactId>maven-clean-plugin</artifactId> <version>3.1.0</version> </plugin> <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging --> <plugin> <artifactId>maven-resources-plugin</artifactId> <version>3.0.2</version> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.0</version> </plugin> <plugin> <artifactId>maven-surefire-plugin</artifactId> <version>2.22.1</version> </plugin> <plugin> <artifactId>maven-war-plugin</artifactId> <version>3.2.2</version> </plugin> <plugin> <artifactId>maven-install-plugin</artifactId> <version>2.5.2</version> </plugin> <plugin> <artifactId>maven-deploy-plugin</artifactId> <version>2.8.2</version> </plugin> </plugins> </pluginManagement> </build> </project>具体位置如下图所示
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${pageContext.request.contextPath}获取绝对路径乱码问题，导致jsp页面获取不到静态资源 ${pageContext.request.contextPath}获取绝对路径乱码问题问题 Maven搭建的SSM项目，jsp页面用${pageContext.request.contextPath}获取绝对路径，运行后页面获取不到静态资源。截图解决方法IDEA创建项目时web.xml中的头文件默认版本是2.3，需要改成3.0，如下所示。<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> </web-app>效果重新发布项目 可见。
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关于${pageContext.request.contextPath}的理解（转载） ${pageContext.request.contextPath}是JSP取得绝对路径的方法，等价于<%=request.getContextPath()%> 。 也就是取出部署的应用程序名或者是当前的项目名称 比如我的项目名称是demo1在浏览器中输入为http://localhost:8080/demo1/a.jsp ${pageContext.request.contextPath}或<%=request.getContextPath()%>取出来的就是/demo1,而"/"代表的含义就是http://localhost:8080故有时候项目中这样写${pageContext.request.contextPath}/a.jsp绝对路径与相对路径的比较１）采用相对路径遇到的问题 相对路径固然比较灵活，但如果想复制页面内的代码却变得比较困难，因为不同的页面具有不同的相对路径，复制后必须修改每一个连接的路径。 如果页面被多于一个的页面所包含，那么被包含页面中的相对路径将是不正确的。 如果采用Struts的Action返回页面，那么由于页面路径与 Action路径不同，使得浏览器无法正确解释页面中的路径，如页面为/pages/cust/cust.jsp，图片所有目录为/images /title.gif，这时在/pages/cust/cust.jsp中的所用的路径为”http://images.cnblogs.com /title.gif”，但是如果某一个Action的Forward指向这个JSP文件，而这个Action的路径为/cust/manage.do， 那么页面内容中”http://images.cnblogs.com/title.gif”就不再指向正确的路径了。 解决以上问题似乎只有使用绝对路径了。２）采用绝对路径遇到的问题 随着不同的Web应用发布方式，绝对路径的值也不同。如Web应用发布为MyApp，则路径”/MyApp/images/title.gif”是正确的， 但发布为另一应用时如MyApp2，这个路径就不对了，也许这个情况比较少，但以default方式发布Web应用时以上绝对路径也不 同：”/images/title.gif”。二．解决方案１）采用绝对路径，但为了解决不同部署方式的差别，在所有非struts标签的路径前加${pageContext.request.contextPath}，如原路径为： ”/images/title.gif”，改为“${pageContext.request.contextPath}/images/title.gif”。 代码” ${pageContext.request.contextPath}”的作用是取出部署的应用程序名，这样不管如何部署，所用路径都是正确的。缺点： 操作不便，其他工具无法正确解释${pageContext.request.contextPath}２） 采用相对路径，在每个JSP文件中加入base标签，如： <base href="http://${header['host']}${pageContext.request.contextPath}/pages/cust/relation.jsp" />这样所有的路径都可以使用相对路径。缺点： 对于被包含的文件依然无效。 真正使用时需要灵活应用１）和２），写出更加健壮的代码。 在使用的时候可以使 用${pageContext.request.contextPath}，也同时可以使 用<%=request.getContextPath()%>达到同样的效果，同时，也可以 将${pageContext.request.contextPath}，放入一个JSP文件中，将用C：set放入一个变量中，然后在用的时候用EL 表达式取出来。</pre><pre name="code" class="html"><c:set var="ctx" value="${pageContext.request.contextPath}" /> 内容仅供个人学习、记录使用，侵删
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js按钮复选框选择 小Demo 全选，全部选，反选<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>按钮选择器</title> <style> table { margin-top: 200px; text-align: center; } tr, th { height: 50px; } div { margin-top: 50px; margin-left: 40%; } </style> </head> <body> <table border="1px" width="500px" cellspacing="0" align="center"> <caption><h2>学生表</h2></caption> <tr> <th><input type="checkbox" name="cb" id="fist_select"></th> <th>编号</th> <th>姓名</th> <th>性别</th> <th>操作</th> </tr> <tr> <td><input type="checkbox" name="cb"></td> <td>1</td> <td>孔子</td> <td>男</td> <td>删除</td> </tr> <tr> <td><input type="checkbox" name="cb"></td> <td>1</td> <td>孔子</td> <td>男</td> <td>删除</td> </tr> <tr> <td><input type="checkbox" name="cb"></td> <td>1</td> <td>孔子</td> <td>男</td> <td>删除</td> </tr> <tr> <td><input type="checkbox" name="cb"></td> <td>1</td> <td>孔子</td> <td>男</td> <td>删除</td> </tr> </table> <div> <input type="button" id="selectall" value="全选"> <input type="button" id="noselectall" value="全不选"> <input type="button" id="unSelect" value="反选"> </div> <script> //浏览器对象加载完毕 window.onload= function() { //按钮点击事件 document.getElementById("selectall").onclick = function() { //获取所有的复选框按钮 var cbs = document.getElementsByName('cb'); //遍历数组 for (var i = 0; i < cbs.length; i++) { //checked 属性设置或返回 checkbox 是否应被选中。 //checkboxObject.checked=true|false //调用checked() 方法 cbs[i].checked = true; } } document.getElementById("noselectall").onclick = function() { var cbs = document.getElementsByName('cb'); for (var i = 0; i < cbs.length; i++) { cbs[i].checked = false; } } document.getElementById("unSelect").onclick = function() { var cbs = document.getElementsByName('cb'); for (var i = 0; i < cbs.length; i++) { cbs[i].checked = !cbs[i].checked; } } document.getElementById("fist_select").onclick = function() { var cbs = document.getElementsByName('cb'); for (var i = 0; i < cbs.length; i++) { cbs[i].checked = this.checked; } } } </script> </body> </html>预览地址：https://bltang.cc/demo/buttonCheckbox.html
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Java Cookie-设置/获取 判断用户是否为第一次访问 且记录访问时间 小Demo protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //获取cookies response.setContentType("text/html;charset=utf-8"); Cookie[] cookies = request.getCookies(); boolean flag = false; //返回数组遍历数组 寻找 lastTime参数 if (cookies != null && cookies.length >0){ //遍历 for (Cookie cookie : cookies) { //获取 cookie 键 寻找 lastTime String name = cookie.getName(); if ("lastTime".equals(name)){ flag = true; //如果有 就不是第一次登录 Date date = new Date(); //设置时间戳格式 SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日HH:mm:ss"); //返回日期 String src_date = sdf.format(date); //设置 cookie cookie.setValue(src_date); //设置cookie 存活时间 cookie.setMaxAge( 60 * 60 * 24 * 30 ); //添加cookie response.addCookie(cookie); //获取 cookie String value = cookie.getValue(); //打印信息 response.getWriter().write("<h1>欢迎回来，您上次的访问时间为"+ value + "</h1>"); } } } if (cookies == null || cookies.length == 0 || flag == false) { Date date = new Date(); //设置时间戳格式 SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日HH:mm:ss"); //返回日期 String src_date = sdf.format(date); //设置 cookie Cookie cookie = new Cookie("lastTime",src_date); //设置cookie 存活时间 cookie.setMaxAge( 60 * 60 * 24 * 30 ); //获取 cookie response.addCookie(cookie); response.getWriter().write("欢迎用户，您是第一次访问登录！"); } }
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仿新浪导航样式 效果代码如下<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>新浪导航</title> <style> * { margin: 0; padding: 0; } .nav { height: 41px; background-color: #FCFCFC; border-top: 4px solid #FF8500; border-bottom: 1px solid #EDEEF0; } .nav a { display: inline-block;/* 块,行内元素转为行内块 */ height: 41px; /*background-color: green;*/ line-height: 41px; padding: 0px 20px; text-decoration: none; color: #4C4C4C; font-size: 12px; } .nav a:hover { /* style */ background-color: #CCC; } </style> </head> <body> <div class="nav"> <a href="#">设为首页</a> <a href="#">手机新浪网</a> <a href="#">移动客户端</a> <a href="#">博客</a> <a href="#">微博</a> <a href="#">关注我</a> </div> </body> </html>
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IDEA中使用单元测试@Test等,提示没有 Junit.jar包 Junit 单元测试类 出现问题如下@Test 找不到包，没有提示导包并报错解决方法如下File-->Project Structure-->Modules-->右侧Dependencies-->+号-->JARs or directories...2.在弹出窗口中找到IDEA的安装目录-->点击lib展开-->选择所需的两个包(hamcrest-core-1.3.jar与junit-4.12.jar)-->点击ok3.勾选新加入的这两个包-->Apply-->OK {message type="success" content=" 然后就能愉快的使用@Test注解了"/}
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[逆向]某校园跑软件签名算法分析 前言同学在群中分享某虚拟定位轻松跑步法。作为旁观者，萌生出模拟请求进行数据伪造来完成任务（老操作了，像骨灰盒自动参加赠楼这种）某校园跑软件其实要求还算可以，极限情况：50天、每天1公里5分钟；就是不太好坚持分析思路{x} 抓包，看请求是否有签名，没有就去第4步 {x} 检测安装包是否有壳，无壳就去第4步 {x} 脱壳 {x} 分析代码 {x} 伪造请求 {x} 等待正义的审判 ::(惊哭)一、先抓包（非重点，不过多赘述）token 理论上是用户标识appkey 肯定大部分时间为定值sign MD5签名二、查壳360加固，一般 #(cos滑稽)三、脱壳这里使用这个工具：CodingGay/BlackDex: BlackDex is an Android unpack(dexdump) tool, it supports Android 5.0~12 and need not rely to any environment. BlackDex can run on any Android mobile phone or emulator, you can unpack APK File in several seconds. (github.com) 下载32位版本安装包（因为，目标APP是32位的）{message type="warning" content="顺便记下包名com.tanma.unirun"/}单击目标应用，开始脱壳四、分析目标“源码”位置打开脱壳后的dex文件所在目录，使用MT管理器 的 dex编辑器++ 打开搜索字符串 sign只看目标应用的包看包名：{x} entities 实体包，排除 {x} enums 枚举包，排除 {x} network.settings 网络设置包 且类名”MyInterceptor”与拦截相关, 大概率符合条件初步查看源码，在请求头中添加sign，肯定是这里了接下来，使用电脑进行具体签名流程分析了五、分析代码逻辑分析请看注释public final class MyInterceptor implements Interceptor { private static final String APPKEY = "389885588s0648fa"; private static final String APPSECRET = "56E39A1658455588885690425C0FD16055A21676"; private static final Charset ChartSet_UTF8 = Charset.forName("UTF-8"); public static final Companion Companion = new Companion((DefaultConstructorMarker) null); public MyInterceptor() { } static { } public Response intercept(Interceptor.Chain chain) { boolean z; String str; Request.Builder newBuilder; Request.Builder addHeader; Request.Builder addHeader2; Request.Builder newBuilder2; Request.Builder addHeader3; Request.Builder addHeader4; Request.Builder addHeader5; String str2; String str3; boolean z2; String str4; String str5; String str6; String str7; Set queryParameterNames; Interceptor.Chain chain2 = chain; Intrinsics.checkParameterIsNotNull(chain2, "chain"); Request request = chain.request(); // 注意，TreeSet是有序集合，且默认为正序排列，即{a, b, c, d [,...]} TreeSet treeSet = new TreeSet(); Request request2 = null; HttpUrl url = request != null ? request.url() : null; if (!(url == null || (queryParameterNames = url.queryParameterNames()) == null)) { treeSet.addAll(queryParameterNames); } // 待签名字符串 StringBuilder sb = new StringBuilder(); Iterator it = treeSet.iterator(); // 开始迭代所有请求参数 while (true) { z = false; if (!it.hasNext()) { break; } // str8 为参数名 String str8 = (String) it.next(); // 获取参数名对应的值 List queryParameterValues = url != null ? url.queryParameterValues(str8) : null; if (queryParameterValues != null && (true ^ queryParameterValues.isEmpty())) { // 参数值非空 // 取参数值列表第一个 String str9 = (String) (url != null ? url.queryParameterValues(str8) : null).get(0); if (!TextUtils.isEmpty(str9)) { // str8 参数名， str9 参数值 // str9非空，追加str8 str9在sb之后 sb.append(str8); sb.append(str9); } } } // 追加APPKEY sb.append("389885588s0648fa"); // 追加APPSECRET sb.append("56E39A1658455588885690425C0FD16055A21676"); if (request.body() != null) { BufferedSink buffer = new Buffer(); RequestBody body = request.body(); if (body != null) { body.writeTo(buffer); } Charset charset = ChartSet_UTF8; RequestBody body2 = request.body(); MediaType contentType = body2 != null ? body2.contentType() : null; if (contentType != null) { // 追加请求体 sb.append(buffer.readString(contentType.charset(charset))); } } // 同sb String sb2 = sb.toString(); Intrinsics.checkExpressionValueIsNotNull(sb2, "signStr.toString()"); CharSequence charSequence = sb2; if (!(charSequence == null || charSequence.length() == 0)) { // 本级语句块替换一些字符为空字符，即删除部分字符，这将导致参与MD5运算的字符串有所差异 // z2 为是否发生过替换操作 // 删除空格 if (StringsKt.contains$default(charSequence, " ", false, 2, (Object) null)) { str3 = StringsKt.replace$default(sb2, " ", "", false, 4, (Object) null); z2 = true; } else { str3 = sb2; z2 = false; } // 删除~ if (StringsKt.contains$default(str3, "~", false, 2, (Object) null)) { str4 = StringsKt.replace$default(str3, "~", "", false, 4, (Object) null); z2 = true; } else { str4 = str3; } // 删除! if (StringsKt.contains$default(str4, "!", false, 2, (Object) null)) { str5 = StringsKt.replace$default(str4, "!", "", false, 4, (Object) null); z2 = true; } else { str5 = str4; } // 删除( if (StringsKt.contains$default(str5, "(", false, 2, (Object) null)) { str6 = StringsKt.replace$default(str5, "(", "", false, 4, (Object) null); z2 = true; } else { str6 = str5; } // 删除) if (StringsKt.contains$default(str6, ")", false, 2, (Object) null)) { str7 = StringsKt.replace$default(str6, ")", "", false, 4, (Object) null); z2 = true; } else { str7 = str6; } // 删除' if (StringsKt.contains$default(str7, "'", false, 2, (Object) null)) { sb2 = StringsKt.replace$default(str7, "'", "", false, 4, (Object) null); z = true; } else { z = z2; sb2 = str7; } if (z) { sb2 = URLEncoder.encode(sb2, "utf-8"); Intrinsics.checkExpressionValueIsNotNull(sb2, "URLEncoder.encode(dealStr,\"utf-8\")"); } } if (z) { StringBuilder sb3 = new StringBuilder(); // 使用替换结果 sb2 计算MD5 String encodeByMD5 = MD5Digest.Companion.encodeByMD5(sb2); if (encodeByMD5 == null) { str2 = null; } else if (encodeByMD5 != null) { // 转换为大写 str2 = encodeByMD5.toUpperCase(); Intrinsics.checkExpressionValueIsNotNull(str2, "(this as java.lang.String).toUpperCase()"); } else { throw new TypeCastException("null cannot be cast to non-null type java.lang.String"); } sb3.append(str2); // MD5追加编码 sb3.append("encodeutf8"); str = sb3.toString(); } else { MD5Digest.Companion companion = MD5Digest.Companion; // 没有发生替换，使用sb String sb4 = sb.toString(); Intrinsics.checkExpressionValueIsNotNull(sb4, "signStr.toString()"); // 使用sb计算MD5 String encodeByMD52 = companion.encodeByMD5(sb4); if (encodeByMD52 == null) { str = null; } else if (encodeByMD52 != null) { // 转换为大写 str = encodeByMD52.toUpperCase(); Intrinsics.checkExpressionValueIsNotNull(str, "(this as java.lang.String).toUpperCase()"); } else { throw new TypeCastException("null cannot be cast to non-null type java.lang.String"); } } try { User user = (User) new PreUtil("sp_name_user").getValue("sp_user", Reflection.getOrCreateKotlinClass(User.class), (Object) null); if (user != null) { OauthTokenBean oauthToken = user.getOauthToken(); String token = oauthToken != null ? oauthToken.getToken() : null; Request request3 = chain.request(); if (!(request3 == null || (newBuilder2 = request3.newBuilder()) == null || (addHeader3 = newBuilder2.addHeader("token", token)) == null || (addHeader4 = addHeader3.addHeader("appKey", "389885588s0648fa")) == null || (addHeader5 = addHeader4.addHeader("sign", str)) == null) // 添加签名至头部 ) { request2 = addHeader5.build(); } } else { Request request4 = chain.request(); if (!(request4 == null || (newBuilder = request4.newBuilder()) == null || (addHeader = newBuilder.addHeader("appKey", "389885588s0648fa")) == null || (addHeader2 = addHeader.addHeader("sign", str)) == null)) { request2 = addHeader2.build(); } } Response proceed = chain2.proceed(request2); if (proceed == null) { Intrinsics.throwNpe(); } return proceed; } catch (Exception e) { e.printStackTrace(); Response proceed2 = chain2.proceed(request); if (proceed2 == null) { Intrinsics.throwNpe(); } return proceed2; } } }六、逻辑总结（经过验证）{x} 将请求参数正序排序 {x} 将请求参数按 参数名1参数值1参数名2参数值2.... 拼接 {x} 追加appkey, 追加appsecret {x} 追加请求体 {x} 删除部分字符 {x} 计算MD5
![[逆向]某校园跑软件签名算法分析](https://img.bltang.cc/img/2021/11/3968663026.jpg)