IDEA 导入 Tomcat9 源码

源码下载（Source Code Distributions）地址：https://tomcat.apache.org/download-90.cgi

tomcat 和 servlet 以及 jdk 版本的对应关系：http://tomcat.apache.org/whichversion.html

附上搭建好的环境：https://gitee.com/jhxxb/MyTomcat

一、解压源码

在源码根目录新建 home 文件夹，把 conf 文件夹和 webapps 文件夹移动到 home 文件夹里，然后在源码根目录新建 pom.xml 文件（原来为 Ant 工程，这里把它改为 Maven 工程）

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>tomcat</artifactId>
    <name>tomcat</name>
    <version>9.0.19</version>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.ant</groupId>
            <artifactId>ant</artifactId>
            <version>1.10.5</version>
        </dependency>
        <dependency>
            <groupId>wsdl4j</groupId>
            <artifactId>wsdl4j</artifactId>
            <version>1.6.3</version>
        </dependency>

        <!--<dependency>-->
            <!--<groupId>javax.xml</groupId>-->
            <!--<artifactId>jaxrpc</artifactId>-->
            <!--<version>1.1</version>-->
        <!--</dependency>-->
        <dependency>
            <groupId>org.apache.geronimo.specs</groupId>
            <artifactId>geronimo-jaxrpc_1.1_spec</artifactId>
            <version>2.1</version>
        </dependency>

        <!--<dependency>-->
            <!--<groupId>org.eclipse.jdt.core.compiler</groupId>-->
            <!--<artifactId>ecj</artifactId>-->
            <!--<version>4.5</version>-->
        <!--</dependency>-->
        <dependency>
            <groupId>org.eclipse.jdt</groupId>
            <artifactId>ecj</artifactId>
            <version>3.17.0</version>
        </dependency>


        <dependency>
            <groupId>org.easymock</groupId>
            <artifactId>easymock</artifactId>
            <version>4.0.2</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <configuration>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

 

二、用 IDEA 直接打开

这里删除了一些无用的文件

1.打开项目属性（F4）

把 java 文件夹标记为 Sources，test 文件夹标记为 Tests

2.运行

找到 org.apache.catalina.startup.Bootstrap 运行 main 方法

 

2.1、ResponseTrailers 找不到，把 home\webapps\examples\WEB-INF\classes\trailers 目录拷贝到 test 目录下

ResponseTrailers.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package trailers;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;
import java.util.function.Supplier;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * This example writes some trailer fields to the HTTP response.
 */
public class ResponseTrailers extends HttpServlet {

    private static final long serialVersionUID = 1L;
    private static final Supplier<Map<String,String>> TRAILER_FIELD_SUPPLIER =
            new TrailerFieldSupplier();


    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {

        resp.setTrailerFields(TRAILER_FIELD_SUPPLIER);
        resp.setContentType("text/plain");
        resp.setCharacterEncoding("UTF-8");

        PrintWriter pw  = resp.getWriter();

        pw.print("This response should include trailer fields.");
    }


    private static class TrailerFieldSupplier implements Supplier<Map<String,String>> {

        private static final Map<String,String> trailerFields = new HashMap<>();

        static {
            trailerFields.put("x-trailer-1", "Trailer value one");
            trailerFields.put("x-trailer-2", "Trailer value two");
        }

        @Override
        public Map<String, String> get() {
            return trailerFields;
        }
    }
}

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