2012-11-11 66 views
0

我在Eclipse中創建了maven-archetype-webapp項目。我想在Java中使用Clojure代碼。 所以,有我core.clj文件:試圖在Eclipse中使用java和clojure創建maven動態web項目

(ns coq.core 
(:gen-class 
    :name coq.core 
    :methods [#^{:static true} [foo [int] void]])) 

(defn -foo [i] (println "Hello from Clojure. My input was " i)) 

(defn -main [] (println "Hello from Clojure -main.")) 

的pom.xml:

<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>gleboGroup</groupId> 
<artifactId>javaandclojure</artifactId> 
<packaging>war</packaging> 
<version>0.0.1-SNAPSHOT</version> 
<name>javaandclojure Maven Webapp</name> 
<url>http://maven.apache.org</url> 
<dependencies> 
    <dependency> 
     <groupId>junit</groupId> 
     <artifactId>junit</artifactId> 
     <version>3.8.1</version> 
     <scope>test</scope> 
    </dependency> 
    <dependency> 
     <groupId>javax.servlet</groupId> 
     <artifactId>javax.servlet-api</artifactId> 
     <version>3.1-b02</version> 
     <type>jar</type> 
     <scope>compile</scope> 
    </dependency> 
    <dependency> 
     <groupId>org.clojure</groupId> 
     <artifactId>clojure</artifactId> 
     <version>1.3.0</version> 
    </dependency> 
</dependencies> 
<build> 
    <finalName>javaandclojure</finalName> 
    <plugins> 
     <plugin> 
      <groupId>com.theoryinpractise</groupId> 
      <artifactId>clojure-maven-plugin</artifactId> 
      <version>1.3.10</version> 
      <configuration> 
       <sourceDirectories> 
        <sourceDirectory>src/main/clojure</sourceDirectory> 
       </sourceDirectories> 
       <testSourceDirectories> 
        <testSourceDirectory>src/test/clojure</testSourceDirectory> 
       </testSourceDirectories> 
      </configuration> 
      <executions> 
       <execution> 
        <id>compile</id> 
        <phase>compile</phase> 
        <goals> 
         <goal>compile</goal> 
        </goals> 
       </execution> 
       <execution> 
        <id>test</id> 
        <phase>test</phase> 
        <goals> 
         <goal>test</goal> 
        </goals> 
       </execution> 
      </executions> 
     </plugin> 
     <plugin> 
      <artifactId>maven-compiler-plugin</artifactId> 
      <version>2.3.2</version> 
      <executions> 
       <execution> 
        <id>default-compile</id> 
        <phase>compile</phase> 
        <goals> 
         <goal>compile</goal> 
        </goals> 
       </execution> 
       <execution> 
        <id>default-testCompile</id> 
        <phase>test-compile</phase> 
        <goals> 
         <goal>testCompile</goal> 
        </goals> 
       </execution> 
      </executions> 
     </plugin> 
    </plugins> 
</build> 

有錯誤的core.foo我的一個servlet(123):

package com.javaandclojure; 

import java.io.IOException; 
import javax.servlet.annotation.WebServlet; 
import javax.servlet.ServletException; 
import javax.servlet.http.*; 

import coq.*; 

@WebServlet({ "/*"}) 
public class Main extends HttpServlet { 
    private static final long serialVersionUID = 1L; 

    protected void doGet(HttpServletRequest request, 
      HttpServletResponse response) throws ServletException, IOException { 
     System.out.println("inside get!"); 
     core.foo(123);// core cannot be resolved 
     request.setAttribute("number", 42); 
     request.getRequestDispatcher("/index.jsp").forward(request, response); 
    } 
} 

eclipse中的一些scrinshots:

enter image description here

構建路徑:

enter image description here

Maven構建與目標: 「清包」 給它:

[INFO] Scanning for projects... 
[INFO]                   
[INFO] ------------------------------------------------------------------------ 
[INFO] Building javaandclojure Maven Webapp 0.0.1-SNAPSHOT 
[INFO] ------------------------------------------------------------------------ 
[INFO] 
[INFO] --- maven-clean-plugin:2.4.1:clean (default-clean) @ javaandclojure --- 
[INFO] Deleting D:\porn\indigo\javaandclojure\target 
[INFO] 
[INFO] --- maven-resources-plugin:2.4.3:resources (default-resources) @ javaandclojure --- 
[WARNING] Using platform encoding (Cp1251 actually) to copy filtered resources, i.e. build is platform dependent! 
[INFO] Copying 0 resource 
[INFO] 
[INFO] --- maven-compiler-plugin:2.3.2:compile (default-compile) @ javaandclojure --- 
[WARNING] File encoding has not been set, using platform encoding Cp1251, i.e. build is platform dependent! 
[INFO] Compiling 1 source file to D:\porn\indigo\javaandclojure\target\classes 
[INFO] ------------------------------------------------------------- 
[ERROR] COMPILATION ERROR : 
[INFO] ------------------------------------------------------------- 
[ERROR] \porn\indigo\javaandclojure\src\main\java\com\javaandclojure\Main.java:[10,10] error: package coq does not exist 
[ERROR] \porn\indigo\javaandclojure\src\main\java\com\javaandclojure\Main.java:[17,2] error: cannot find symbol 
[INFO] 2 errors 
[INFO] ------------------------------------------------------------- 
[INFO] ------------------------------------------------------------------------ 
[INFO] BUILD FAILURE 
[INFO] ------------------------------------------------------------------------ 
[INFO] Total time: 2.042s 
[INFO] Finished at: Sun Nov 11 16:28:25 EET 2012 
[INFO] Final Memory: 8M/20M 
[INFO] ------------------------------------------------------------------------ 
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile (default-compile) on project javaandclojure: Compilation failure: Compilation failure: 
[ERROR] \porn\indigo\javaandclojure\src\main\java\com\javaandclojure\Main.java:[10,10] error: package coq does not exist 
[ERROR] \porn\indigo\javaandclojure\src\main\java\com\javaandclojure\Main.java:[17,2] error: cannot find symbol 
[ERROR] -> [Help 1] 
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. 
[ERROR] Re-run Maven using the -X switch to enable full debug logging. 
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles: 
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException 

也許我應該用另一種Maven原型?

+0

你看過clojure生成的.class文件嗎? – Cubic

+0

javaandclojure \ target \ javaandclojure \ WEB-INF \ classes \ coq \ contains:core $ _foo.class,core $ _main,core $ loading__4505__auto __。class,core.class,core__init.class,core.cls – Hlib

回答

2

這是因爲Java編譯器正在clojure編譯器之前運行。

如果您強制Java編譯發生在clojure-maven-plugin之後,它將起作用。這些行添加clojure-maven-plugin後:

<plugin> 
    <artifactId>maven-compiler-plugin</artifactId> 
    <version>2.3.2</version> 
    <executions> 
     <execution> 
      <id>default-compile</id> 
      <phase>none</phase> 
     </execution> 
     <execution> 
      <id>default-testCompile</id> 
      <phase>none</phase> 
     </execution> 
     <execution> 
      <id>java-compile</id> 
      <phase>compile</phase> 
      <goals> 
       <goal>compile</goal> 
      </goals> 
     </execution> 
     <execution> 
      <id>java-testCompile</id> 
      <phase>test-compile</phase> 
      <goals> 
       <goal>testCompile</goal> 
      </goals> 
     </execution> 
    </executions> 
</plugin> 
+0

我改變了pom。 XML和沒有任何改變。那麼我改變了它? – Hlib

+0

如果你從命令行運行'mvn compile',你會發現它的工作原理。沒有這個插件配置,我建議它不會編譯。 – maba

+0

所以我不能在沒有這些錯誤的Eclipse中工作? – Hlib

0

我建議你創建2模式的項目,所以很清楚什麼取決於什麼。如果你的Java代碼必須依賴你的Clojure代碼,那麼Java模塊(war?)應該依賴於clojure模塊。

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