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閫氳繃澶氭牳鍜屽鍙拌綆楁満錛屽厑璁告垜浠墿灞曡綆楄兘鍔涳紱閫氳繃澶氬彴璁＄畻鏈哄拰緗戠粶閫傞厤鍣紝鍏佽鎴戜滑鎵╁睍緗戠粶甯﹀銆?
闃呰鍏ㄦ枃
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jmap [ option ] pid
jmap [ option ] executable core
jmap [ option ] [server-id@]remote-hostname-or-IP
鍙傛暟
option 鍙傛暟鏄崟涓鐨勶紝绱ц窡鍦ㄥ懡浠ゅ悗闈€?br />pid 瑕佽鏄犲皠鐨勮繘紼嬨傚繀欏繪槸java榪涚▼銆傜敤jps鍙互鑾峰緱java榪涚▼鍒楄〃
executable 浜х敓鏍稿績杞偍鐨勫彲鎵цjava浠ｇ爜
core 瑕佽鏄犲皠鐨勬牳蹇冩枃浠?br />remote-hostname-or-IP 榪滅▼璋冭瘯鏈嶅姟鍣ㄧ殑鍩熷悕鎴栬卛p鍦板潃錛堢湅jsadebugd錛?br />server-id 鍙夊敮涓id錛屽鏋滃涓湇鍔″櫒榪愯鍦ㄥ悓涓涓繙紼嬩富鏈?br />
鎻忚堪
鏄鍒跺叡浜璞＄殑鍐呭瓨鏄犲皠銆佺粰瀹氳繘紼嬬殑鍫嗗唴瀛樸佹牳蹇冩枃浠躲佽繙紼嬭皟璇曟湇鍔″櫒銆傚鏋滅粰瀹氱殑榪涚▼鏄啀64鐨刅M錛屼綘闇瑕佸埗瀹氬弬鏁幫紝渚嬪錛?br /> jmap -J-d64 -heap pid
娉ㄦ剰:榪欎釜宸ュ叿鍦ㄦ湭鏉ョ殑JDK閲屽彲鑳戒笉鏀寔鎴栬呬笉鍑虹幇銆傚湪windows緋葷粺閲屾病鏈塪bgeng.dll錛?闇瑕佸畨瑁?Debugging Tools for Windows'鏉ヨ繍琛岃繖浜涘伐鍏楓傚悓鏃禤ATH鐜鍙橀噺蹇呴』鍖呭惈琚洰鏍囪繘紼嬫垨鑰呭穿婧冨鍑烘枃浠朵綅緗攣浣跨敤鐨刯vm.dll璺緞銆備緥濡傦細
set PATH=\jre\bin\client;%PATH%
OPTIONS
<no option> 褰撴病鏈夐夐」錛宩map澶嶅埗鍏變韓瀵硅薄鏄犲皠銆傜洰鏍囪櫄鎷熸満涓殑姣忎竴涓垎浜璞°佸紑濮嬪湴鍧銆佹槧灝勫ぇ灝忋佸畬鏁磋礬寰勮澶嶅埗銆傝繖綾諱技浜嶴olaris涓殑pmap宸ュ叿銆?/font>
-dump:[live,]format=b,file=<filename> 鎶妀ava鍫嗗鍑烘垚hprof浜岃繘鍒舵牸寮忔枃浠躲俵ive瀛愰夐」鏄彲閫夌殑銆傚鏋滄寚瀹氾紝鍙湁鍫嗕腑鐨勬椿瀵硅薄琚鍑恒傛祻瑙堝爢闀滃儚錛屼綘鍙互浣跨敤jhat銆?/font>
-finalizerinfo 澶嶅埗姝ｅ湪絳夊緟鍥炴敹鐨勫璞′俊鎭?/font>
-heap 澶嶅埗涓涓爢寰楁瑕併備嬌鐢ㄧ殑GC綆楁硶鍫嗛厤緗紝浣跨敤浠ｇ殑澶у皬銆?/font>
-histo[:live] 澶嶅埗涓涓爢寰楁煴鐘跺浘銆傛瘡涓狫ava綾伙紝瀵硅薄涓暟錛屽唴瀛樺ぇ灝忥紙byte錛夛紝綾誨叏璺緞銆俈M鐨勫唴閮ㄧ被鐢?涓哄墠緙銆傚鏋渓ive瀛愰夐」琚寚瀹氾紝鍙湁媧誨璞¤璁℃暟銆?/font>
-permstat 鎵撳嵃鍫嗕腑姘哥敓浠ｇ殑綾誨姞杞藉櫒鐨勫娉涚粺璁°傛瘡涓姞杞藉櫒鐨勫悕瀛楋紝媧繪э紝鍦板潃錛岀埗鍔犺澆鍣紝瀹冨姞杞界殑綾葷殑澶у皬銆傚彟澶栵紝椹葷暀瀛楃涓茬殑澶у皬鍜屾暟閲忋?/font>
-F 寮哄埗銆備嬌鐢╦map -dump 鎴栬?jmap -histo 閫夐」鏃訛紝濡傛灉pid娌℃湁鍝嶅簲銆傚湪榪欎釜妯″紡涓媗ive瀛愰夐」涓嶆敮鎸併?/font>
-h 甯姪
-help 甯姪
-J<flag> java铏氭嫙鏈洪夐」
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JDBC涓嬩嬌鐢?/span>Savepoint
紺轟緥浠ｇ爜錛?/p>
conn.setAutoCommit(false);// Set a conservative transaction isolation level.conn.setTransactionIsolation(Connection.TRANSACTION_SERIALIZABLE);Statement stmt = conn.createStatement();int rows = stmt.executeUpdate( "INSERT INTO authors " + '(first_name, last_name) VALUES " + '('Lewis', 'Carroll')");// Set a named savepoint.Savepoint svpt = conn.setSavepoint("NewAuthor");// 
rows = stmt.executeUpdate( "UPDATE authors set type = 'fiction' " + "WHERE last_name = 'Carroll'");// conn.rollback(svpt);// // The author has been added, but not updated.conn.commit();
紺轟緥緇撴灉灝辨槸錛?/span>insert璇彞灝嗚鎵ц錛?/span>update璇彞鏈墽琛岋紝鍏惰鍥炴粴浜嗐?br />
Hibernate涓嬩嬌鐢?/span>Savepoint
紺轟緥錛?/p>
Session s = sf.openSession(); Transaction tx = s.beginTransaction(); User u1 = new User();u1.setId(1);u1.setName("u1"); s.save(u1); Savepoint savepoint1 = s.connection().setSavepoint(); User u2 = new User();u2.setId(2);u2.setName("u2"); s.save(u2); s.flush();s.connection().rollback(savepoint1); //s.connection().releaseSavepoint(savepoint1); tx.commit();
Spring瀵?/span>Savepoint鐨勬敮鎸?/span>
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涓嬭澆瀹夎鍖咃細amoeba-mysql-binary-2.1.0-RC5.tar.gz
涓嬭澆婧愪唬鐮侊細http://amoeba.googlecode.com/svn/trunk
1.瀹氫綅Amoeba鍚姩綾?/p>
鎵撳紑amoeba.bat錛岀粡榪囧垎鏋愶紝amoeba鐨勫惎鍔ㄦ槸閫氳繃classworlds榪涜鍔犺澆鐨勶紝鍏充簬classworlds璇峰弬瑙?a >http://classworlds.codehaus.org/launchusage.html
鍦╝moeba.bat涓槸閫氳繃浠ヤ笅璇彞鏉ュ畾浣峜lassworlds鍚姩搴旂敤鐨勯厤緗」鐨?br />
set DEFAULT_OPTS=%DEFAULT_OPTS% "-Dclassworlds.conf=%AMOEBA_HOME%\bin\amoeba.classworlds"
浠ヤ笅鏄痑moeba.classworlds鐨勫唴瀹?/p>
main is com.meidusa.amoeba.server.AmoebaProxyServer from amoeba[amoeba]
load ${amoeba.home}/lib/*.jar
load $
load ${amoeba.home}/lib/classes鎰忔濆氨鏄痑moeba搴旂敤鏄粠com.meidusa.amoeba.server.AmoebaProxyServer寮濮嬪惎鍔ㄧ殑銆?/p>
鎺ヤ笅鏉ユ妸amoeba涓嬬殑婧愭枃浠跺拰amoeba-mysql涓嬬殑婧愭枃浠跺鍏ュ埌欏圭洰涓紝浠ュ強鐩稿叧jar錛?br />
涓轟簡鑳藉湪bebug妯″紡涓嬪惎鍔紝寤鴻鍦╠ebug-arguments涓嬪鍔爏tart arguments錛?br />
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聽聽聽聽聽聽聽 if (document.getElementById) {
聽聽聽聽聽聽聽聽聽聽 var tree = new WebFXTree('Root');
聽聽聽聽聽聽聽聽聽聽 tree.setBehavior('classic');
聽聽聽聽聽聽聽聽聽聽 var a = new WebFXTreeItem('1');
聽聽聽聽聽聽聽聽聽聽 tree.add(a);
聽聽聽聽聽聽聽聽聽聽 var b = new WebFXTreeItem('1.1');
聽聽聽聽聽聽聽聽聽聽 a.add(b);
聽聽聽聽聽聽聽聽聽 b.add(new WebFXTreeItem('1.1.1'));
聽聽聽聽聽聽聽聽聽 b.add(new WebFXTreeItem('1.1.2'));
聽聽聽聽聽聽聽聽聽 b.add(new WebFXTreeItem('1.1.3'));
聽聽聽聽聽聽聽聽聽 var f = new WebFXTreeItem('1.1.4');
聽聽聽聽聽聽聽聽聽 b.add(f);
聽聽聽聽聽聽聽聽 document.write(tree);
/*------------------ xtree.js浠ｇ爜鐗囨 ----------*/
WebFXTree.prototype.toString = function() {
alert("it's here!");
聽var str = "<div id=\"" + this.id + "\" ondblclick=\"webFXTreeHandler.toggle(this);\" class=\"webfx-tree-item\" onkeydown=\"return webFXTreeHandler.keydown(this, event)\">" +
聽聽"<img id=\"" + this.id + "-icon\" class=\"webfx-tree-icon\" src=\"" + ((webFXTreeHandler.behavior == 'classic' && this.open)?this.openIcon:this.icon) + "\" onclick=\"webFXTreeHandler.select(this);\">" +
聽聽"<a href=\"" + this.action + "\" id=\"" + this.id + "-anchor\" onfocus=\"webFXTreeHandler.focus(this);\" onblur=\"webFXTreeHandler.blur(this);\"" +
聽聽(this.target ? " target=\"" + this.target + "\"" : "") +
聽聽">" + this.text + "</a></div>" +
聽聽"<div id=\"" + this.id + "-cont\" class=\"webfx-tree-container\" style=\"display: " + ((this.open)?'block':'none') + ";\">";
聽var sb = [];
聽for (var i = 0; i < this.childNodes.length; i++) {
聽聽sb[i] = this.childNodes[i].toString(i, this.childNodes.length);
聽}
聽this.rendered = true;
聽return str + sb.join("") + "</div>";
};
緇忚繃璺熻釜錛岃瘉瀹炲湪鎵цdocument.write(tree)鏃訛紝璋冪敤浜?u>WebFXTree.prototype.toString 鏂規硶銆?br />
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