谢谢大家的回答。经过进一步调查，我弄清楚了如何使其工作。我必须完全重新编写build.xml。这里是：
<property file="build.properties" /><path id="cobertura.classpath"> <fileset dir="${cobertura.dir}"> <include name="***.class" /> <exclude name="***Test.java" /> </fileset> </batchtest> </junit> <!-- JUnit Report in HTML --> <junitreport todir="${reports.xml.dir}"> <fileset dir="${reports.xml.dir}"> <include name="TEST-*.xml" /> </fileset> <report format="frames" todir="${reports.html.dir}" /> </junitreport></target><target name="coverage-check"> <cobertura-check branchrate="34" totallinerate="100" /></target><target name="coverage-report"> <!-- Generate an XML file containing the coverage data using the "srcdir" attribute. --> <cobertura-report srcdir="${src.dir}" destdir="${coverage.xml.dir}" format="xml" /></target><target name="summary-coverage-report"> <!-- Generate an summary XML file containing the coverage data using the "srcdir" attribute. --> <cobertura-report srcdir="${src.dir}" destdir="${coverage.summaryxml.dir}" format="summaryXml" /></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="${coverage.html.dir}"> <fileset dir="${src.dir}"> <include name="**/*.java"/> </fileset> </cobertura-report></target><target name="clean" description="Remove all files created by the build/test process."> <delete dir="${classes.dir}" /> <delete dir="${instrumented.dir}" /> <delete dir="${reports.dir}" /> <delete file="cobertura.log" /> <delete file="cobertura.ser" /></target><target name="coverage" depends="compile,instrument,test,coverage-report,summary-coverage-report,alternate-coverage-report" description="Compile, instrument ourself, run the tests and generate JUnit and coverage reports."/>属性定义在开头引用的build.properties文件中
