注：geoserver版本Linuxgeoserver2.15.0安裝：bin方式安裝(內(nèi)嵌jetty，非war安裝)

一。geoserver調(diào)優(yōu)之Java圖像處理優(yōu)化

1.原生JAI和ImageIO

GeoServer的圖像處理功能使用了Java的JAI和JAIImageIO功能，但由于Java的JAI和JAIImageIO庫默認(rèn)是Java實(shí)現(xiàn)，若將其換為原生庫可顯著提高圖像處理速度。注意，在windows下只有32位Java環(huán)境才可用，64位Java環(huán)境不可用原生庫。下載和拷貝原生庫文件的操作參考以下代碼：

cd/tmp
wgethttp://download.java.net/media/jai/builds/release/1_1_3/jai-1_1_3-lib-linux-amd64.tar.gz
wgethttp://download.java.net/media/jai-imageio/builds/release/1.1/jai_imageio-1_1-lib-linux-amd64.tar.gz

#解壓

gunzip-cjai-1_1_3-lib-linux-amd64.tar.gz|tarxf-
gunzip-cjai_imageio-1_1-lib-linux-amd64.tar.gz|tarxf-

#把解壓之后的相關(guān)文件拷貝到j(luò)re目錄下(jdk安裝目錄)

#/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.171-8.b10.el7_5.x86_64指jdk安裝目錄，查看jdk安裝目錄

參考：http://gantiao.com.cn/post/18002178.html

cp/tmp/jai-1_1_3/lib/*.jar/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.171-8.b10.el7_5.x86_64/jre/lib/ext/
cp/tmp/jai-1_1_3/lib/*.so/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.171-8.b10.el7_5.x86_64/jre/lib/amd64/
cp/tmp/jai_imageio-1_1/lib/*.jar/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.171-8.b10.el7_5.x86_64/jre/lib/ext/
cp/tmp/jai_imageio-1_1/lib/*.so/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.171-8.b10.el7_5.x86_64/jre/lib/amd64/

2.重啟geoserver報錯geoserver啟動Couldnotinitializeclassjavax.media.jai.JAI

原因：jdk底下新加的jar包和geoserver的web-lib目錄下JAI的jar包沖突了https://blog.csdn.net/zhang88lei/article/details/6050424

3.解決：刪除$CATALINA_BASE/webapps/geoserver/WEB-INF/lib目錄下的jai_codec-1.1.3.jar;jai_core-1.1.3.jar;jai_imageio-1.1.jar三個文件

注：先備份后刪除

mkdir-p/tmp/geoserver/
cp/usr/local/geoserver-2.15.0/webapps/geoserver/WEB-INF/lib/jai*.jar/tmp/geoserver/
cd/usr/local/geoserver-2.15.0/webapps/geoserver/WEB-INF/lib
ls
lsjai*
rm-f-rjai_codec-1.1.3.jar
lsjai*
rm-f-rjai_core-1.1.3.jar
ls
lsjai*
rm-f-rjai_imageio-1.1.jar
lsjai*

4.重啟geoserver

二。原生庫變回java庫

1.刪除jre下的原生jar包(核對是否是自己之前復(fù)制過去的那些jar包)

rm-f-r/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.171-8.b10.el7_5.x86_64/jre/lib/ext/jai_codec.jar
rm-f-r/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.171-8.b10.el7_5.x86_64/jre/lib/ext/jai_core.jar
rm-f-r/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.171-8.b10.el7_5.x86_64/jre/lib/ext/jai_imageio.jar
rm-f-r/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.171-8.b10.el7_5.x86_64/jre/lib/ext/mlibwrapper_jai.jar
rm-f-r/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.171-8.b10.el7_5.x86_64/jre/lib/ext/clibwrapper_jiio.jar

2.刪除jre下的原生so文件(核對是否是自己之前復(fù)制過去的那些文件)

rm-f-r/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.171-8.b10.el7_5.x86_64/jre/lib/amd64/libmlib_jai.so
rm-f-r/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.171-8.b10.el7_5.x86_64/jre/lib/amd64/libclib_jiio.so

3.把之前刪除的/webapps/geoserver/WEB-INF/lib目錄下的jai_codec-1.1.3.jar;jai_core-1.1.3.jar;jai_imageio-1.1.jar三個文件還原

cp-r/tmp/geoserver/*.jar/usr/local/geoserver-2.15.0/webapps/geoserver/WEB-INF/lib/