1:报错如下

Exception in thread "main" java.io.IOException: DerInputStream.getLength(): lengthTag=111, too big.
  at sun.security.util.DerInputStream.getLength(DerInputStream.java:599)
  at sun.security.util.DerValue.init(DerValue.java:391)
  at sun.security.util.DerValue.<init>(DerValue.java:332)
  at sun.security.util.DerValue.<init>(DerValue.java:345)
  at sun.security.pkcs12.PKCS12KeyStore.engineLoad(PKCS12KeyStore.java:1938)
  at java.security.KeyStore.load(KeyStore.java:1445)
  at com.wn.cloud.finance.manager.SHA256WithRSATest.parseP12(SHA256WithRSATest.java:107)
  at com.wn.cloud.finance.manager.SHA256WithRSATest.sign(SHA256WithRSATest.java:62)
  at com.wn.cloud.finance.manager.SHA256WithRSATest.main(SHA256WithRSATest.java:41)
Disconnected from the target VM, address: '127.0.0.1:50815', transport: 'socket'

2:解决方法

这个插件的作用是在maven编译打包项目的时候忽略指定后缀的文件，秘钥如果不忽略就会被编译，编译后就会出问题

maven对它支持的几种类型外在编译的时候会对其他文件改写里面的内容

在pom文件中<plugins></plugins>中加入以下配置就OK

        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <configuration><encoding>UTF-8</encoding>
                    <!-- 过滤后缀为pem、pfx的证书文件 -->
                    <nonFilteredFileExtensions>
                        <nonFilteredFileExtension>p12</nonFilteredFileExtension>
                        <nonFilteredFileExtension>cer</nonFilteredFileExtension>
                        <nonFilteredFileExtension>pem</nonFilteredFileExtension>
                        <nonFilteredFileExtension>pfx</nonFilteredFileExtension>
                    </nonFilteredFileExtensions>
                </configuration>
            </plugin>
        </plugins>