xpages不同数据库共享ssjs

叁歲伎倆 2022-07-24 04:16 83阅读 0赞

如果在xpages不同的数据库可以共享ssjs就方便了，类似于前端的js一样，这是以前的想法。最近在网上真的看到这篇类似文章，以下是做个简单的demo,有时间交流:QQ 873968102

[demo下载][demo]

0)这里是原文

[http://hasselba.ch/blog/?p=832][http_hasselba.ch_blog_p_832]

1)引用java类

![20160512202250282][]

package ch.hasselba.xpages.util.ssjs;
    
    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import com.ibm.xsp.util.StreamUtil;
    import com.ibm.xsp.page.compiled.ExpressionEvaluatorImpl;
    import javax.faces.context.FacesContext;
    import javax.faces.el.ValueBinding;
    
    public class SSJSUtil {
    	private static final String NEWLINE = "\n";
        private static final String SSJS_EXPRESSION_BEGIN = "#{javascript:";
        private static final String SSJS_EXPRESSION_END = "}";
    
        /**
         * Loads SSJS code from a given URL and executes it
         * Declared methods and objects are reachable for other SSJS code
         * 
         * @param url of the SSJS code
         * @return Object resulting object from SSJS execution
         * @author Sven Hasselbach
         * @version 1.0.1
         * @category Utility
         */
        public static Object executeSSJSFromURL( final String url ){
            return execute( loadFromURL( url ) );
        }
    
        /**
         * loads a URL stream and converts it to a string
         * @param url of the resource
         * @return String containing the data loaded from given url
         * @author Sven Hasselbach
         * @version 1.0.1
         * @category Utility
         */
        public static String loadFromURL( final String url ){
            String ret = null;
            try{
                FacesContext fc = FacesContext.getCurrentInstance();
                InputStream in = StreamUtil.getInputStream(fc, url);
                ret = inputStreamToString( in );
            }catch(Exception e){
                e.printStackTrace();
            }
            return ret;
        }
    
        /**
         * executes given SSJS code and returns the result (if any)
         * functions / libraries are added to runtime 
         * 
         * @param ssjsCode code to execute
         * @return resulting object
         * @author Sven Hasselbach
         * @version 1.0.2
         * @category SSJS
         */
        public static Object execute( final String ssjsCode ){
            Object ret = null;
    
            try{
                String valueExpr = SSJS_EXPRESSION_BEGIN + ssjsCode + SSJS_EXPRESSION_END;
                FacesContext fc = FacesContext.getCurrentInstance();
                ExpressionEvaluatorImpl evaluator = new ExpressionEvaluatorImpl( fc );
                ValueBinding vb = evaluator.createValueBinding( fc.getViewRoot(), valueExpr, null, null);
                ret = vb.getValue(fc);
            }catch(Exception e){
                e.printStackTrace();
            }
            return ret;
        }
    
        /**
         * converts the data from a given inputstream to a string
         * 
         * @param in InputStream to convert
         * @return String containing data from input stream
         * @throws IOException
         * @author Sven Hasselbach
         * @version 1.0.1
         * @category Utility
         */
        public static String inputStreamToString(final InputStream inStream) throws IOException {
            BufferedReader bufReader = new BufferedReader( new InputStreamReader(inStream) );
            StringBuilder strBuilder = new StringBuilder();
            String line = null;
    
            while ((line = bufReader.readLine()) != null) {
                strBuilder.append(line);
                strBuilder.append( NEWLINE );
            }
            bufReader.close();
    
            return strBuilder.toString();
         }
    }

2)写个ssjs放到html路径下面

function test(){
    	return "I am a ssjs test";
    }
    
    function hello(){
    	return 'hello world!'
    }
    
    function geturl(){
    	return context.getUrl();
    }

![20160512202721386][]

3）在xpages页面引用

<xp:view xmlns:xp="http://www.ibm.com/xsp/core">
    	
    	<xp:label id="label1">
    		<xp:this.value>
    			<![CDATA[#{javascript:
    			importPackage( ch.hasselba.xpages.util.ssjs );
    			var url=@Left(context.getUrl(),context.getUrl().getPath())+'/873968102.jss';
    			SSJSUtil.executeSSJSFromURL(url);
    			test();
             }]]>
    		</xp:this.value>
    	</xp:label>
    	<xp:br></xp:br>
    	
    	<xp:label id="label2">
    		<xp:this.value>
    			<![CDATA[#{javascript:
    			//SSJSUtil.executeSSJSFromURL(url);
    			hello();
             }]]>
    		</xp:this.value>
    	</xp:label>
    	<xp:br></xp:br>
    	<xp:br></xp:br>
    	<xp:br></xp:br>
    	<xp:inputText id="inputText1" defaultValue="#{javascript:geturl();}"
    		style="width:364.0px">
    	</xp:inputText>
    </xp:view>

![20160512202830956][]

[demo]: http://download.csdn.net/detail/weijia3624/9518406
[http_hasselba.ch_blog_p_832]: http://hasselba.ch/blog/?p=832
[20160512202250282]: /images/20220722/0b7e1d03b62540c5b11f550473985a42.png
[20160512202721386]: /images/20220722/6037780e2ffe4d2b81300c5327f40048.png
[20160512202830956]: /images/20220722/f4939a3a9cd14750aea28c734b142474.png