ant——condition

ant condition的常用用法

basic elements: istrue isfalse not and or xor available isset equals  filesmatch

1. isset指定属性是否存在

<property file="${basedir}/javaConfig/user.properties"/>

<condition property="fppcondition">
<isset property="FPP"/>
</condition>
<antcall target="isFPPTrue"></antcall>
<antcall target="isFPPFalse"></antcall>

<target name="isFPPTrue" if="fppcondition">
<echo>FPP is ture</echo>
</target>

<target name="isFPPFalse" unless="fppcondition">
<echo>FPP is false</echo>
</target>

又如：

<project name="testCondition">
<!--属性也可以通过ant参数-D来设置-->
<property name="name" value="this is name"/>
<target name="test">
<condition property="scondition">
<!--如果属性name不存在则返回false-->
<isset property="name"/>
</condition>
<antcall target="isTrue"></antcall>
<antcall target="isFalse"></antcall>
</target>
<target name="isTrue" if="scondition">
<echo>is ture</echo>
</target>
<target name="isFalse" unless="scondition">
<echo>is false</echo>
</target>
</project>

2. istrue isfalse: 断言真假
<project name="testCondition">
<target name="test">
<condition property="scondition">
<istrue value="true"/>
</condition>
<antcall target="isTrue"></antcall>
<antcall target="isFalse"></antcall>
</target>
<target name="isTrue" if="scondition">
<echo>is ture</echo>
</target>
<target name="isFalse" unless="scondition">
<echo>is false</echo>
</target>
</project>

3. 逻辑运算
3.1  not 逻辑非

<project name="testCondition">
<target name="test">
<condition property="scondition">
＜not>
<istrue value="true"/>
</not>
</condition>
<antcall target="isTrue"></antcall>
<antcall target="isFalse"></antcall>
</target>
<target name="isTrue" if="scondition">
<echo>is ture</echo>
</target>
<target name="isFalse" unless="scondition">
<echo>is false</echo>
</target>
</project>
3.2  and  逻辑与
<project name="testCondition">
<target name="test">
<condition property="scondition">
＜and>
<istrue value="true"/>
<istrue value="false"/>
</and>
</condition>
<antcall target="isTrue"></antcall>
<antcall target="isFalse"></antcall>
</target>
<target name="isTrue" if="scondition">
<echo>is ture</echo>
</target>
<target name="isFalse" unless="scondition">
<echo>is false</echo>
</target>
</project>
3.3  or逻辑或
xor 异或（语法上与and类似）

4. available  是否可用

<project name="testCondition">
<path id="all.test.classes">
<pathelement location="bin"/>
</path>
<target name="test">
<condition property="scondition">
<!--在指定的classpath路径下是否存在资源 TestTest.class-->
<available resource="TestTest.class">
<classpath refid="all.test.classes" />
</available>
</condition>
<antcall target="isTrue"></antcall>
<antcall target="isFalse"></antcall>
</target>
<target name="isTrue" if="scondition">
<echo>is ture</echo>
</target>
<target name="isFalse" unless="scondition">
<echo>is false</echo>
</target>
</project>

5.  equals  是否相等
<project name="testCondition">
<!--属性也可以通过ant参数-D来设置-->
<property name="name" value="this is name"/>
<target name="test">
<condition property="scondition">
<!--如果arg1的值与arg2的值相等返回true，否则为false-->
<equals arg1="${name}" arg2="this is name"/>
</condition>
<antcall target="isTrue"></antcall>
<antcall target="isFalse"></antcall>
</target>
<target name="isTrue" if="scondition">
<echo>is ture</echo>
</target>
<target name="isFalse" unless="scondition">
<echo>is false</echo>
</target>
</project>

6. filesmatch  比较文件
<project name="testCondition">
<target name="test">
<condition property="scondition">
<!--如果file1所代表的文件与file2所代表的文件相等返回true，否则为false-->
<filesmatch file1="testfile1.txt" file2="testfile2.txt"/>
</condition>
<antcall target="isTrue"></antcall>
<antcall target="isFalse"></antcall>
</target>
<target name="isTrue" if="scondition">
<echo>is ture</echo>
</target>
<target name="isFalse" unless="scondition">
<echo>is false</echo>
</target>
</project>