java - 当我尝试使用此 Ant 脚本进行编译时，为什么会出现这些错误？

Question

我对 Ant 很陌生(我来自 Maven)，我发现这个简单的 Ant 脚本编译位于 Eclipse 工作区中的 Java 项目有一些困难:

Ant脚本代码是:

<?xml version="1.0"?>
<project>

    <!-- ============================================ -->
    <!-- Load build properties                        -->
    <!-- ============================================ -->

    <property name="project.buildfile" value="build.num" />
    <property file="${project.buildfile}" />
    <property file="info.properties" />

    <!-- Elimina le cartelle contenenti le classi compilate ed i jar -->
    <target name="clean">
        <delete dir="../Release" />
        <!-- Elimina directory del jar finale -->
        <delete dir="bin" />
        <!-- Elimina directory delle classi compilate -->
    </target>

    <target name="compile">
        <mkdir dir="bin" />
        <javac srcdir="src" destdir="bin" />
    </target>
</project>

所以这个脚本有一个名为clean的第一个目标，它只需将2个目录删除到我的项目中(这部分工作得很好)

另一个目标名为compile，它实现了与项目编译相关的 2 个简单任务:

1)在我的项目中创建一个名为bin的目录(这样就可以了)

2) 编译src项目文件夹中的源代码，并将.class文件放入bin目录中。

这里我遇到了一些问题，因为当我执行这个 ant 脚本时，我收到这些错误消息:

Buildfile: /home/andrea/Documenti/XCloud/Implementazione/CrossPlatform/CrystalIceXMLHandler/Project/build.xml
clean:
   [delete] Deleting directory /home/andrea/Documenti/XCloud/Implementazione/CrossPlatform/CrystalIceXMLHandler/Project/bin
compile:
    [mkdir] Created dir: /home/andrea/Documenti/XCloud/Implementazione/CrossPlatform/CrystalIceXMLHandler/Project/bin
    [javac] /home/andrea/Documenti/XCloud/Implementazione/CrossPlatform/CrystalIceXMLHandler/Project/build.xml:22: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds
    [javac] Compiling 35 source files to /home/andrea/Documenti/XCloud/Implementazione/CrossPlatform/CrystalIceXMLHandler/Project/bin
    [javac] /home/andrea/Documenti/XCloud/Implementazione/CrossPlatform/CrystalIceXMLHandler/Project/src/com/techub/crystalice/xmlhandler/Settings.java:12: package org.apache.log4j does not exist
    [javac] import org.apache.log4j.Logger;
    [javac]                        ^
    [javac] /home/andrea/Documenti/XCloud/Implementazione/CrossPlatform/CrystalIceXMLHandler/Project/src/com/techub/crystalice/xmlhandler/Settings.java:14: package com.adamtaft.eb does not exist
    [javac] import com.adamtaft.eb.EventBusService;
    [javac]                       ^
    [javac] /home/andrea/Documenti/XCloud/Implementazione/CrossPlatform/CrystalIceXMLHandler/Project/src/com/techub/crystalice/xmlhandler/Settings.java:26: cannot find symbol
    [javac] symbol  : class Logger
    [javac] location: class com.techub.crystalice.xmlhandler.Settings
    [javac]     public static final Logger logger = Logger.getLogger("gui");
    [javac]                         ^
    [javac] /home/andrea/Documenti/XCloud/Implementazione/CrossPlatform/CrystalIceXMLHandler/Project/src/com/techub/crystalice/xmlhandler/Utils.java:9: package org.apache.log4j does not exist
    [javac] import org.apache.log4j.Logger;
    [javac]                        ^
    [javac] /home/andrea/Documenti/XCloud/Implementazione/CrossPlatform/CrystalIceXMLHandler/Project/src/com/techub/crystalice/xmlhandler/Utils.java:16: cannot find symbol
    [javac] symbol  : class Logger
    [javac] location: class com.techub.crystalice.xmlhandler.Utils
    [javac]     private static final Logger logger = Logger.getLogger("gui");
    [javac]                          ^
    [javac] /home/andrea/Documenti/XCloud/Implementazione/CrossPlatform/CrystalIceXMLHandler/Project/src/com/techub/crystalice/xmlhandler/Settings.java:26: cannot find symbol
    [javac] symbol  : variable Logger
    [javac] location: class com.techub.crystalice.xmlhandler.Settings
    [javac]     public static final Logger logger = Logger.getLogger("gui");
    [javac]                                         ^
    [javac] /home/andrea/Documenti/XCloud/Implementazione/CrossPlatform/CrystalIceXMLHandler/Project/src/com/techub/crystalice/xmlhandler/Settings.java:130: cannot find symbol
    [javac] symbol  : variable EventBusService
    [javac] location: class com.techub.crystalice.xmlhandler.Settings
    [javac]         EventBusService.publish(new SettingsEvent(this, SettingsEventType.UPDATED));
    [javac]         ^
    [javac] /home/andrea/Documenti/XCloud/Implementazione/CrossPlatform/CrystalIceXMLHandler/Project/src/com/techub/crystalice/xmlhandler/Utils.java:16: cannot find symbol
    [javac] symbol  : variable Logger
    [javac] location: class com.techub.crystalice.xmlhandler.Utils
    [javac]     private static final Logger logger = Logger.getLogger("gui");
    [javac]                                          ^
    [javac] 8 errors
BUILD FAILED
/home/andrea/Documenti/XCloud/Implementazione/CrossPlatform/CrystalIceXMLHandler/Project/build.xml:22: Compile failed; see the compiler error output for details.
Total time: 1 second

为什么我会出现这些错误？怎么解决？

Tnx

安德里亚

Answer 1

ant 似乎无法找到所需的库/jar。您需要在这两个地方之一拥有所需的库/jar:

1. ANT_HOME/lib
2. 用户特定目录，${user.home}/.ant/lib