idea環境源碼調試tomcat9

1、源碼下載：http://archive.apache.org/dist/tomcat/tomcat-9/v9.0.30/src/

2、創建項目根目錄：apache-tomcat-9-debug

3、創建子目錄apache-tomcat-9-debug\apache-tomcat-9.0.30_src將tomcat源碼解壓到apache-tomcat-9.0.30_src文件夾下

4、創建子目錄apache-tomcat-9-debug\catalina-home將apache-tomcat-9.0.30_src文件夾下的conf文件夾拷貝到catalina-home目錄

5、創建外層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/maven-v4_0_0.xsd">
 
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.yang</groupId>
    <artifactId>apache-tomcat-study</artifactId>
    <name>Tomcat 9.0 Study</name>
    <version>1.0</version>
    <packaging>pom</packaging>
 
    <modules>
        <module>apache-tomcat-9.0.30_src</module>
    </modules>
</project>

目錄結構如下

6、創建tomcat9依賴文件pom.xml

<?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.apache.tomcat</groupId>
    <artifactId>tomcat9</artifactId>
    <name>tomcat9</name>
    <version>9.0</version>

    <build>
        <finalName>apache-tomcat-9.0.0.M26-src</finalName>
        <sourceDirectory>java</sourceDirectory>
        <!--<testSourceDirectory>test</testSourceDirectory>  test 下的有些文件報錯，因此將test文件夾去掉了-->
        <resources>
            <resource>
                <directory>java</directory>
            </resource>
        </resources>
        <testResources>
            <testResource>
                <directory>test</directory>
            </testResource>
        </testResources>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <encoding>UTF-8</encoding>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <version>2.6</version>
            </plugin>
        </plugins>
    </build>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>ant</groupId>
            <artifactId>ant</artifactId>
            <version>1.6.5</version>
        </dependency>
        <dependency>
            <groupId>org.easymock</groupId>
            <artifactId>easymock</artifactId>
            <version>3.4</version>
        </dependency>
        <dependency>
            <groupId>com.sun.xml.messaging.saaj</groupId>
            <artifactId>saaj-impl</artifactId>
            <version>1.3</version>
        </dependency>
        <dependency>
            <groupId>wsdl4j</groupId>
            <artifactId>wsdl4j</artifactId>
            <version>1.6.2</version>
        </dependency>
        <dependency>
            <groupId>javax.xml</groupId>
            <artifactId>jaxrpc</artifactId>
            <version>1.1</version>
        </dependency>
        <dependency>
            <groupId>org.eclipse.jdt.core.compiler</groupId>
            <artifactId>ecj</artifactId>
            <version>4.6.1</version>
        </dependency>
        <dependency>
            <groupId>javax.xml</groupId>
            <artifactId>jaxrpc-api</artifactId>
            <version>1.1</version>
        </dependency>
        <dependency>
            <groupId>javax.xml</groupId>
            <artifactId>jaxrpc-api</artifactId>
            <version>1.1</version>
        </dependency>
    </dependencies>
</project>

7、啓動idea，選擇"打開"，打開項目apache-tomcat-9-debug

8、右鍵點擊apache-tomcat-9.0.30_src目錄下java文件夾，選擇Mark Directory As Source Root

9、添加配置文件，選擇application；

main class配置：org.apache.catalina.startup.Bootstrap

vm option 配置：-Dfile.encoding=UTF-8 -Dcatalina.home=catalina-home -Dcatalina.base=catalina-home -Djava.endorsed.dirs=catalina-home/endorsed -Djava.io.tmpdir=catalina-home/temp -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.util.logging.config.file=catalina-home/conf/logging.properties

10、編譯項目，可能會報錯
Error:(320, 45) java: 找不到符號
符號: 變量 VERSION_9
位置: 類 org.eclipse.jdt.internal.compiler.impl.CompilerOptions
統一將錯誤改爲VERSION_1_8即可
11、運行項目

啓動、運行成功；
12、爲何會有亂碼：
原因：一般是中文編碼不匹配導致；經跟蹤，發現是ResourceBundle讀取org\apache\catalina\startup\LocalStrings_zh_CN.properties文件時沒有用utf8解碼導致；
解決：修改org.apache.tomcat.util.res.StringManager類中的getString函數；
由
if (bundle != null) {
str = bundle.getString(key);
}
改爲
if (bundle != null) {
str = new String(bundle.getString(key).getBytes(“ISO-8859-1”), “UTF-8”);
}
再次運行，一切正常

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