itext5.5.12jar以及签名验签依赖jar和亚洲语言包 jar目录 itext5-5.5.12.jar itext核心jar itext5-itext-pdfa-5.5.12.jar itext5-itext-xtra-5.5.12.jar itext5-xmlworker-5.5.12.jar itext-asian.jar 亚洲语言包 bcprov-jdk15on-158.jar 签名依赖bouncycastle bcpkix-jdk15on-158.jar 签名依赖bouncyca