maven clean install报系统资源不足

系统资源不足。
有关详细信息, 请参阅以下堆栈跟踪。
java.lang.OutOfMemoryError: Java heap space
        at com.sun.tools.javac.util.Position$LineMapImpl.build(Position.java:153
)
        at com.sun.tools.javac.util.Position.makeLineMap(Position.java:77)
        at com.sun.tools.javac.parser.JavaTokenizer.getLineMap(JavaTokenizer.jav
a:763)
        at com.sun.tools.javac.parser.Scanner.getLineMap(Scanner.java:127)
        at com.sun.tools.javac.parser.JavacParser.parseCompilationUnit(JavacPars
er.java:3173)
        at com.sun.tools.javac.main.JavaCompiler.parse(JavaCompiler.java:628)
        at com.sun.tools.javac.main.JavaCompiler.parse(JavaCompiler.java:665)
        at com.sun.tools.javac.main.JavaCompiler.parseFiles(JavaCompiler.java:95
0)
        at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:857)
        at com.sun.tools.javac.main.Main.compile(Main.java:523)
        at com.sun.tools.javac.api.JavacTaskImpl.doCall(JavacTaskImpl.java:129)
        at com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:138)
        at org.codehaus.plexus.compiler.javac.JavaxToolsCompiler.compileInProces
s(JavaxToolsCompiler.java:126)
        at org.codehaus.plexus.compiler.javac.JavacCompiler.performCompile(Javac
Compiler.java:169)
        at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute(Abstrac
tCompilerMojo.java:785)
        at org.apache.maven.plugin.compiler.CompilerMojo.execute(CompilerMojo.ja
va:129)
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(Default
BuildPluginManager.java:132)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:208)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:153)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:145)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProje
ct(LifecycleModuleBuilder.java:116)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProje
ct(LifecycleModuleBuilder.java:80)
        at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThre
adedBuilder.build(SingleThreadedBuilder.java:51)
        at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(Lifecycl
eStarter.java:120)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:355)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:155)
        at org.apache.maven.cli.MavenCli.execute(MavenCli.java:584)
        at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:216)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:160)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
原因分析：虚拟机堆溢出，默认只有63M，工程比较多时容易出现此问题(自己的目前是4个工程)

解决方案：在maven启动脚本（mvn.bat）中，重新设置堆大小（set MAVEN_OPTS= -Xms128m -Xmx512m），堆大小根据实际情况进行设置