1.
<javac debug="yes" srcdir="${source.dir}" destdir="${classes.dir}" classpathref="build.classpath" />如上代码所示，请增加
debug="yes"
如果无此属性，则在生成的覆盖报告中，所有类的 Line Coverage是N/A。同时注意观察Ant的构建输出，提示"[cobertura-instrument] WARN visitEnd， No line number information found for class cn.com.sungole.medapp.Web.App. Perhaps you need to compile with debug=true?">。
2.
<classpath location="${instrumented.dir}" />
<classpath>
<path refid="build.classpath"></path>
<pathelement location="${test.classes.dir}" />
<pathelement location="${classes.dir}" />
</classpath>
请在junit中注意添加“ <classpath location="${instrumented.dir}" />”，并注意与下边classpath的顺序，不能颠倒。
如果无此节点，则生成的覆盖报告中，所有类的 Line Coverage均为0%。
同时,Ant的构建正确输出中
[junit] Running cn.com.sungole.medapp.domain.test.BillTest
[junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 2.593 sec
[junit] Cobertura: Loaded information on 10 classes.
[junit] Cobertura: Saved information on 10 classes.
将无最后两行输出信息。
完整的配置示例：
<?xml version="1.0"?>
<project name="coberturaSample1">
<property name="default.target.dir" value="target" />
<property name="classes.dir" value="${default.target.dir}/classes" />
<property name="test.classes.dir" value="${default.target.dir}/test-classes" />
<property name="test.report.dir" value="${default.target.dir}/test-reports" />
<property name="lib.dir" value="${basedir}/lib" />
<property name="javadoc.dir" value="${default.target.dir}/apidocs" />
<property name="source.dir" value="src" />
<property name="test.source.dir" value="test" />
<property name="test.pattern" value="**/**Test.java" />
<!-- Coverage reports are deposited into these directories -->
<property name="cobertura.dir" value="${default.target.dir}/cobertrua" />
<!-- Instrumented classes are deposited into this directory -->
<property name="instrumented.dir" value="instrumented" />
<path id="classpath">
<fileset dir="${lib.dir}" includes="**/*.jar" />
</path>
<path id="cobertura.classpath">
<fileset dir="${lib.dir}">
<include name="cobertura.jar" />
<include name="*.jar" />
</fileset>
</path>
<taskdef classpathref="cobertura.classpath" resource="tasks.properties">
</taskdef>
<target name="clean">
<delete dir="${classes.dir}" quiet="true" />
<delete dir="${test.classes.dir}" />
<delete dir="${default.target.dir}" />
</target>
<target name="init" depends="clean">
<mkdir dir="${classes.dir}" />
<mkdir dir="${test.classes.dir}" />
<mkdir dir="${javadoc.dir}" />
<mkdir dir="${default.target.dir}" />
<mkdir dir="${instrumented.dir}" />
<path id="build.classpath">
<fileset dir="${lib.dir}">
<include name="**/*.jar" />
</fileset>
<fileset dir="${default.target.dir}">
<include name="**/*.jar" />
</fileset>
</path>
</target>
<target name="compile-source" depends="init" description="compiles all .java files in source directory">
<javac debug="yes" srcdir="${source.dir}" destdir="${classes.dir}" classpathref="build.classpath" />
</target>
<target name="instrument" depends="compile-source">
<delete file="cobertura.ser" />
<delete file="${instrumented.dir}" />
<!--Instrument the application classes, writing the instrumented classes into ${build.instrumented.dir}.-->
<cobertura-instrument todir="${instrumented.dir}">
<ignore regex="org.apache.log4j.*" />
<fileset dir="${classes.dir}">
<!-- Instrument all the application classes, but don't instrument the test classes.-->
<include name="**/*.class" />
<exclude name="**/*Test.class" />
</fileset>
</cobertura-instrument>
</target>
<target name="jar" depends="instrument" description="生成jar 文件。Comppresstion .jar file">
<jar jarfile="${default.target.dir}/${ant.project.name}.jar" basedir="${classes.dir}">
</jar>
</target>
<target name="complie-tests" depends="jar" description="compiles all .java files in test directory ">
<javac debug="yes" srcdir="${test.source.dir}" destdir="${test.classes.dir}" classpathref="build.classpath">
</javac>
</target>
<target name="javadoc" depends="init">
<javadoc author="true" use="true" version="true" charset="gbk" sourcepath="${source.dir}" classpathref="build.classpath" destdir="${javadoc.dir}">
</javadoc>
</target>
<target name="test" depends="complie-tests" description="runs JUnit tests">
<mkdir dir="${test.report.dir}" />
<copy file="src/hibernate.cfg.xml" todir="target/classes" />
<copy file="src/log4j.properties" todir="target/classes" />
<copy todir="target/classes">
<fileset dir="src" />
<globmapper from="*.hbm.xml" to="*.hbm.xml" />
</copy>
<junit haltonfailure="no" printsummary="on" fork="yes" dir="${basedir}">
<sysproperty key="basedir" value="${basedir}"/>
<formatter type="xml"/>
<!--
Note the classpath order: instrumented classes are before the
original (uninstrumented) classes. This is important.
如果缺少此行,则在覆盖率报告中,所有的类会出现"Line Coverage 为 0%"的现象
-->
<classpath location="${instrumented.dir}" />
<classpath>
<path refid="build.classpath"></path>
<pathelement location="${test.classes.dir}" />
<pathelement location="${classes.dir}" />
</classpath>
<formatter type="xml" />
<batchtest todir="${test.report.dir}">
<fileset dir="${test.source.dir}">
<include name="${test.pattern}" />
</fileset>
</batchtest>
</junit>
</target>
<target name="converage-check">
<cobertura-check branchrate="40" totallinerate="100" />
</target>
<target name="converage-report">
<cobertura-report srcdir="${source.dir}" destdir="${cobertura.dir}" format="html"/>
</target>
<target name="alternate-coverage-report">
<!--
Generate a series of HTML files containing the coverage
data in a user-readable form using nested source filesets.
-->
<cobertura-report destdir="${cobertura.dir}">
<fileset dir="${source.dir}">
<include name="**/*.java"/>
</fileset>
</cobertura-report>
</target>
<target name="coverage" depends="jar,instrument,test,converage-report,alternate-coverage-report"></target>
<target name="all" depends="coverage,javadoc" />
</project>