J2EE模塊中的jsp資源的maven打包和引用

這里接上一篇，介紹如何將一個(gè)j2ee的Maven模塊中的資源，包括jsp，打包到一個(gè)jar包中，提供給其他項(xiàng)目引用。

1、被依賴的項(xiàng)目

1.1 代碼修改

被依賴的項(xiàng)目，采用上一篇的module，新建幾個(gè)測試的jsp，如下。
child/childPub.jsp：

<!DOCTYPE html>  
<html lang="en">  
<head>  
    <meta charset="UTF-8">  
    <title>Hello World!</title>  
</head>  
<%  
    String tmpChildPubStr = "Hello World!";  
%>  
<body>  
    <h2>child/childPub.jsp: <%=tmpChildPubStr%></h2>  
</body>  
</html>

indexPub.jsp：

<!DOCTYPE html>  
<html lang="en">  
<head>  
    <meta charset="UTF-8">  
    <title>Hello World!</title>  
</head>  
<%  
    String tmpPubStr = "Hello World!";  
%>  
<body>  
    <h2>indexPub.jsp: <%=tmpPubStr%></h2>  
</body>  
</html>

修改pom.xml文件，如下：

<?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>com.lfqy.j2ee</groupId>  
    <artifactId>mvn-tmct</artifactId>  
    <version>1.0-SNAPSHOT</version>  
  
    <dependencies>        <dependency>            <groupId>commons-lang</groupId>  
            <artifactId>commons-lang</artifactId>  
            <version>2.6</version>  
        </dependency>    </dependencies>    <build>    <resources>        <resource>            <directory>src/main/webapp</directory>  
            <excludes>                <exclude>WEB-INF/**</exclude>  
            </excludes>            <targetPath>META-INF/resources</targetPath>  
            <filtering>false</filtering>  
        </resource>    </resources>    </build>  
</project>

從這個(gè)配置，不難看出，實(shí)際的含義是將src/main/webapp目錄下的資源打包到META-INF/resources目錄下，但是不包含WEB-INF子目錄下的內(nèi)容。

1.2 Maven編譯和install

到這里，點(diǎn)擊IDEA編輯器的右側(cè)Maven側(cè)邊欄，選中當(dāng)前的module，先執(zhí)行clean，再執(zhí)行compile之后，可以看出src/main/webapp目錄下的資源已經(jīng)按照我們預(yù)期設(shè)定的，打包到了target目錄下。如下圖。

image.png

然后，在當(dāng)前module的根目錄(pom.xml文件所在的目錄)下，執(zhí)行mvn install命令，如下。

$ mvn install
[INFO] Scanning for projects...
[INFO] 
[INFO] -----------------------< com.lfqy.j2ee:mvn-tmct >-----------------------
[INFO] Building mvn-tmct 1.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ mvn-tmct ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 6 resources to META-INF/resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ mvn-tmct ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ mvn-tmct ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory /Users/chengxia/Developer/TrialProject/mvn-tmct/src/test/resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ mvn-tmct ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ mvn-tmct ---
[INFO] No tests to run.
[INFO] 
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ mvn-tmct ---
[INFO] Building jar: /Users/chengxia/Developer/TrialProject/mvn-tmct/target/mvn-tmct-1.0-SNAPSHOT.jar
[INFO] 
[INFO] --- maven-install-plugin:2.4:install (default-install) @ mvn-tmct ---
[INFO] Installing /Users/chengxia/Developer/TrialProject/mvn-tmct/target/mvn-tmct-1.0-SNAPSHOT.jar to /Users/chengxia/Developer/Java/tools/apache-maven-3.6.0/repository/com/lfqy/j2ee/mvn-tmct/1.0-SNAPSHOT/mvn-tmct-1.0-SNAPSHOT.jar
[INFO] Installing /Users/chengxia/Developer/TrialProject/mvn-tmct/pom.xml to /Users/chengxia/Developer/Java/tools/apache-maven-3.6.0/repository/com/lfqy/j2ee/mvn-tmct/1.0-SNAPSHOT/mvn-tmct-1.0-SNAPSHOT.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  2.221 s
[INFO] Finished at: 2022-11-27T01:18:21+08:00
[INFO] ------------------------------------------------------------------------
$

2、依賴的項(xiàng)目

2.1 代碼修改

參照前面的步驟創(chuàng)建一個(gè)基于Maven的J2EE項(xiàng)目mvn-tmct-parent。
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>com.lfqy.j2ee</groupId>  
    <artifactId>mvn-tmct-parent</artifactId>  
    <version>1.0-SNAPSHOT</version>  
  
    <dependencies>        <dependency>            <groupId>com.lfqy.j2ee</groupId>  
            <artifactId>mvn-tmct</artifactId>  
            <version>1.0-SNAPSHOT</version>  
        </dependency>    </dependencies></project>

新建一個(gè)main.jsp，用于測試項(xiàng)目是否正常。

<!DOCTYPE html>  
<html lang="en">  
<head>  
    <meta charset="UTF-8">  
    <title>Hello World!</title>  
</head>  
<%  
    String tmpStr = "Hello World!";  
%>  
<body>  
<h2>main.jsp: <%=tmpStr%></h2>  
</body>  
</html>

新建一個(gè)mainP.jsp，用于測試是否可以引用Maven依賴jar包resource根目錄下的jsp是否正常。

<!DOCTYPE html>  
<html lang="en">  
<head>  
    <meta charset="UTF-8">  
    <title>Hello World!</title>  
</head>  
<%  
    String tmpMainPStr = "Hello World!";  
%>  
<body>  
<h2>mainP.jsp: <%=tmpMainPStr%></h2>  
<h2>child page:</h2>  
<%@include file="indexPub.jsp" %>  
</body>  
</html>

新建一個(gè)mainPP.jsp，用于測試是否可以引用Maven依賴jar包resource目錄子目錄下的jsp是否正常。

<!DOCTYPE html>  
<html lang="en">  
<head>  
    <meta charset="UTF-8">  
    <title>Hello World!</title>  
</head>  
<%  
    String tmpMainPPStr = "Hello World!";  
%>  
<body>  
<h2>mainPP.jsp: <%=tmpMainPPStr%></h2>  
<h2>child page:</h2>  
<%@include file="child/childPub.jsp" %>  
</body>  
</html>

2.2 編譯和啟動(dòng)

在當(dāng)前module的根目錄下執(zhí)行如下命令，用于拷貝依賴到lib目錄下。

mvn-tmct-parent chengxia$ mvn dependency:copy-dependencies -DoutputDirectory=/Users/chengxia/Developer/TrialProject/mvn-tmct-parent/src/main/webapp/WEB-INF/lib -DincludeScope=runtime
[INFO] Scanning for projects...
[INFO] 
[INFO] -------------------< com.lfqy.j2ee:mvn-tmct-parent >--------------------
[INFO] Building mvn-tmct-parent 1.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- maven-dependency-plugin:2.8:copy-dependencies (default-cli) @ mvn-tmct-parent ---
[INFO] Copying commons-lang-2.6.jar to /Users/chengxia/Developer/TrialProject/mvn-tmct-parent/src/main/webapp/WEB-INF/lib/commons-lang-2.6.jar
[INFO] Copying mvn-tmct-1.0-SNAPSHOT.jar to /Users/chengxia/Developer/TrialProject/mvn-tmct-parent/src/main/webapp/WEB-INF/lib/mvn-tmct-1.0-SNAPSHOT.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  1.765 s
[INFO] Finished at: 2022-11-27T01:40:14+08:00
[INFO] ------------------------------------------------------------------------
mvn-tmct-parent chengxia$

到這里，目錄結(jié)構(gòu)如下。


image.png

項(xiàng)目啟動(dòng)后，瀏覽器中訪問http://localhost:8080/main.jsp，如下。

image.png

訪問http://localhost:8080/mainP.jsp，如下。

image.png

訪問http://localhost:8080/mainPP.jsp，如下。

image.png

到這里，可以看出，maven依賴中的jsp可以被正常引用。
實(shí)際上，也可以直接訪問maven依賴中的jsp。瀏覽器中訪問http://localhost:8080/indexJava.jsp，如下。

image.png

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