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            初試BeanShell和Apache Commons - Jelly

              項(xiàng)目需要用到一個(gè)映射功能,將一個(gè)Bean的屬性,條件的映射到另外一個(gè)bean的屬性里。剛開始的設(shè)計(jì)是自己定義一套XML標(biāo)簽,解析,執(zhí)行。但是這樣的話,特別麻煩,且不說你設(shè)計(jì)的XML時(shí)候易用,易擴(kuò)展。
              用Google百度了下,發(fā)現(xiàn)使用 BeanShell最為方便, Apache Commons - Jelly 次之(但最接近原有設(shè)計(jì))。下面是做的測試?yán)印?br />
            輸出結(jié)果:

            mapped by BeanShell :
            [{dep=ssod, nickName=btpka3, age=18, group=nonage, mailServer=163}, {dep=ssod, nickName=mp3f4, age=25, group=adult, mailServer=gmail}]
            mapped by Apache Commons - Jelly :
            [{dep=ssod, nickName=btpka3, age=18, group=nonage, mailServer=163}, {dep=ssod, nickName=mp3f4, age=25, group=adult, mailServer=gmail}]


            TestMapping.java

            package jp.co.nttdata.autofill.test;

            import java.util.ArrayList;
            import java.util.HashMap;
            import java.util.List;
            import java.util.Map;

            import org.apache.commons.io.output.NullOutputStream;
            import org.apache.commons.jelly.JellyContext;
            import org.apache.commons.jelly.XMLOutput;

            import bsh.Interpreter;
            import edu.emory.mathcs.backport.java.util.Collections;

            public class TestMapping {
                public static void main(String[] args) throws Exception {
                    System.out.println("mapped by BeanShell :");
                    testBeanShell();

                    System.out.println("mapped by Apache Commons - Jelly :");
                    testJelly();
                }

                public static void testBeanShell() throws Exception {
                    List<Map<String, ?>> destList = new ArrayList<Map<String, ?>>();

                    List<Map<String, String>> srcList = new ArrayList<Map<String, String>>();
                    Map<String, String> srcMap = new HashMap<String, String>();
                    srcMap.put("name", "btpka3");
                    srcMap.put("age", "18");
                    srcMap.put("mail", "btpka3@163.com");
                    srcList.add(srcMap);

                    srcMap = new HashMap<String, String>();
                    srcMap.put("name", "mp3f4");
                    srcMap.put("age", "25");
                    srcMap.put("sex", "F");
                    srcMap.put("mail", "mp3f4@gmail.com");
                    srcList.add(srcMap);

                    Interpreter intp = new Interpreter();
                    intp.set("srcList", Collections.unmodifiableCollection(srcList));
                    intp.set("destList", destList);

                    String script = "/autofill/jp/co/nttdata/autofill/test/test.bsh";
                    intp.source(script);

                    System.out.println(destList);

                }

                public static void testJelly() throws Exception {

                    List<Map<String, ?>> destList = new ArrayList<Map<String, ?>>();

                    List<Map<String, String>> srcList = new ArrayList<Map<String, String>>();
                    Map<String, String> srcMap = new HashMap<String, String>();
                    srcMap.put("name", "btpka3");
                    srcMap.put("age", "18");
                    srcMap.put("mail", "btpka3@163.com");
                    srcList.add(srcMap);

                    srcMap = new HashMap<String, String>();
                    srcMap.put("name", "mp3f4");
                    srcMap.put("age", "25");
                    srcMap.put("sex", "F");
                    srcMap.put("mail", "mp3f4@gmail.com");
                    srcList.add(srcMap);

                    JellyContext context = new JellyContext();
                    context.setVariable("srcList", Collections
                            .unmodifiableCollection(srcList));
                    context.setVariable("destList", destList);
                    String script = "/autofill/jp/co/nttdata/autofill/test/test.xml";
                    XMLOutput xmlOutput = XMLOutput.createXMLOutput(new NullOutputStream());
                    context.runScript(script, xmlOutput);

                    System.out.println(destList);
                }
            }


            test.bsh

            import java.util.List;
            import java.util.Map;
            import java.util.LinkedHashMap;

                    for (Map srcBean : srcList) {
                        Map destBean = new LinkedHashMap();
                        
                        // 項(xiàng)目⓪
                        destBean.put("dep", "ssod");

                        // 項(xiàng)目①
                        destBean.put("nickName", srcBean.get("name"));

                        // 項(xiàng)目②
                        destBean.put("age", srcBean.get("age"));

                        // 項(xiàng)目③
                        if (Integer.valueOf(destBean.get("age")) <= 18) {
                            destBean.put("group", "nonage");
                        } else {
                            destBean.put("group", "adult");
                        }

                        // 項(xiàng)目④
                        String srcMailAddr = srcBean.get("mail");
                        destBean.put("mailServer", srcMailAddr.substring(srcMailAddr.indexOf("@")+1, srcMailAddr.indexOf(".")));
                        
                        destList.add(destBean);
                    }


            test.xml

            <?xml version="1.0" encoding="UTF-8"?>
            <jelly trim="false" xmlns="jelly:core">
              <forEach items="${srcList}" var="srcBean">
                <new var="destBean" className="java.util.LinkedHashMap" />

                <!-- 項(xiàng)目&#9450; -->
                <set target="${destBean}" property="dep" value="ssod" />

                <!-- 項(xiàng)目① -->
                <set target="${destBean}" property="nickName" value="${srcBean.name}" />

                <!-- 項(xiàng)目② -->
                <set target="${destBean}" property="age" value="${srcBean['age']}" />

                <!-- 項(xiàng)目③ -->
                <choose>
                  <invokeStatic var="intAge" className="java.lang.Integer"
                    method="valueOf">
                    <arg type="java.lang.String" value="${srcBean.age}" />
                  </invokeStatic>
                  <when test="${intAge le 18}">
                    <set target="${destBean}" property="group" value="nonage" />
                  </when>
                  <otherwise>
                    <set target="${destBean}" property="group" value="adult" />
                  </otherwise>
                </choose>

                <!-- 項(xiàng)目④ -->
                <invokeStatic var="idx" className="java.lang.Long" method="valueOf">
                  <arg type="long" value="${srcBean['mail'].indexOf('@')+1}" />
                  <!-- NOTICE : "${1}' class is Integer, but '${1+1}' is Long -->
                </invokeStatic>
                <set target="
            ${destBean}" property="mailServer"
                  value="
            ${srcBean['mail'].substring(idx.intValue(), srcBean['mail'].indexOf('.'))}" />

                <expr value="
            ${destList.add(destBean)}

            posted on 2013-06-21 16:33 大龍 閱讀(853) 評論(0)  編輯 收藏 引用

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