阿里巴巴 arthas教程2

迈不过友情╰ 2024-04-18 08:01 55阅读 0赞

##### 本文介绍：jad,sc的使用 #####

### 5.jad反编译 ###

可以使用jad反编译class文件，中文字符会被编解码。  
这里以com.runlion.fsp.credit.service.impl包下为例NCSourceServiceImpl类为例：  
我们可以看到整个类的ClassLoader，从哪里加载的，以及类的完整信息；

$ jad com.runlion.fsp.credit.service.impl.NCSourceServiceImpl

$ jad com.runlion.fsp.credit.service.impl.NCSourceServiceImpl
    
    ClassLoader:                                                                                                                                                                              
    +-org.springframework.boot.loader.LaunchedURLClassLoader@681a9515                                                                                                                         
      +-sun.misc.Launcher$AppClassLoader@70dea4e                                                                                                                                              
        +-sun.misc.Launcher$ExtClassLoader@30f39991                                                                                                                                           
    
    Location:                                                                                                                                                                                 
    file:/home/fsp/servers/credit-web-1.0-RELEASE.jar!/BOOT-INF/classes!/                                                                                                                     
    
    /*
     * Decompiled with CFR 0_132.
     * 
     * Could not load the following classes:
     *  com.alibaba.fastjson.JSON
    省略。。。。。。
     *  org.springframework.stereotype.Service
     */
    package com.runlion.fsp.credit.service.impl;
    
    import com.alibaba.fastjson.JSON;
    import com.alibaba.fastjson.JSONObject;
    省略。。。。。。
    import org.springframework.stereotype.Service;
    
    @Service(value="nCSourceServiceImpl")
    public class NCSourceServiceImpl
    implements NCSourceService {
        private static final Logger log = LoggerFactory.getLogger(NCSourceServiceImpl.class);
        @Value(value="${nc.credit.queryYearDiscount.address}")
        private String queryYearDiscountAddress;
        @Value(value="${nc.credit.queryYearDiscount.method}")
        private String queryYearDiscountMethod;
        @Value(value="${nc.credit.querySupplierCorpCredit.address}")
        private String querySupplierCorpCredit;
        @Value(value="${nc.credit.querySupplierAllCorpCredit.address}")
        private String querySupplierAllCorpCredit;
    
        public BigDecimal getDealNoBackMnyFromNC(String custcode, String companycode) {
            log.info("\u3010\u6388\u4fe1\u8c03\u7528NC\u67e5\u8be2\u7d2f\u8ba1\u672a\u9000\u91d1\u989d\u3011\u4eceNC\u83b7\u53d6\u7ecf\u9500\u5546\u7d2f\u8ba1\u672a\u9000\u91d1\u989d,\u5165\u53c2\u4e3acustcode=" + custcode + ",companycode=" + companycode + ",\u5730\u5740\u4e3a\uff1a" + this.queryYearDiscountAddress);
            OMElement omElement = null;
            BigDecimal noBackMny = BigDecimal.ZERO;
            try {
                ServiceClient serviceClient = new ServiceClient();
                String url = this.queryYearDiscountAddress;
                EndpointReference targetEPR = new EndpointReference(url);
                省略。。。。。。

### 6.sc 查看 ###

使用sc命令查看一个类的加载情况

$ sc com.runlion.fsp.credit.controller.web.CreditController
    com.runlion.fsp.credit.controller.web.CreditController
    Affect(row-cnt:1) cost in 10 ms.
    $

输出当前类的详细信息，包括这个类所加载的原始文件来源、类的声明、加载的ClassLoader等详细信息。

$ sc -d com.runlion.fsp.credit.controller.web.CreditController
     class-info        com.runlion.fsp.credit.controller.web.CreditController                                                                                                                 
     code-source       file:/home/fsp/servers/credit-web-1.0-RELEASE.jar!/BOOT-INF/classes!/                                                                                                  
     name              com.runlion.fsp.credit.controller.web.CreditController                                                                                                                 
     isInterface       false                                                                                                                                                                  
     isAnnotation      false                                                                                                                                                                  
     isEnum            false                                                                                                                                                                  
     isAnonymousClass  false                                                                                                                                                                  
     isArray           false                                                                                                                                                                  
     isLocalClass      false                                                                                                                                                                  
     isMemberClass     false                                                                                                                                                                  
     isPrimitive       false                                                                                                                                                                  
     isSynthetic       false                                                                                                                                                                  
     simple-name       CreditController                                                                                                                                                       
     modifier          public                                                                                                                                                                 
     annotation        org.springframework.web.bind.annotation.RestController,org.springframework.web.bind.annotation.RequestMapping                                                          
     interfaces                                                                                                                                                                               
     super-class       +-java.lang.Object                                                                                                                                                     
     class-loader      +-org.springframework.boot.loader.LaunchedURLClassLoader@681a9515                                                                                                      
                         +-sun.misc.Launcher$AppClassLoader@70dea4e                                                                                                                           
                           +-sun.misc.Launcher$ExtClassLoader@30f39991                                                                                                                        
     classLoaderHash   681a9515                                                                                                                                                               
    
    Affect(row-cnt:1) cost in 13 ms.