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BIM项目中一些高可用代码

2017-07-31 20:22 309 查看

1.页面显示内存使用情况

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JVM memory</title>
</head>
<body>
<%
double total = (Runtime.getRuntime().totalMemory()) / (1024.0 * 1024);
double max = (Runtime.getRuntime().maxMemory()) / (1024.0 * 1024);
double free = (Runtime.getRuntime().freeMemory()) / (1024.0 * 1024);
out.println("Java 虚拟机试图使用的最大内存量(当前JVM的最大可用内存)maxMemory(): " + max + "MB<br/>");
out.println("Java 虚拟机中的内存总量(当前JVM占用的内存总数)totalMemory(): " + total + "MB<br/>");
out.println("Java 虚拟机中的空闲内存量(当前JVM空闲内存)freeMemory(): " + free + "MB<br/>");
out.println("JVM实际可用内存: " + (max - total + free) + "MB<br/>");
%>
</body>
</html>
2.通用action配置

<action name="*_*_*_*" class="{1}Action" method="{2}">
<result name="success">pages/{3}/{4}.jsp</result>
<result name="error">pages/{3}/{4}.jsp</result>
<result name="toquery" type="redirect">{4}.action</result>
<result name="noprivilege">pages/login/noPrivilege.jsp</result>
</action>
<action name="*_*" class="{1}Action" method="{2}">
</action>
<action name="*.*.*" class="{1}Action" method="{2}">
<result name="success">pages/{3}.jsp</result>
<result name="error">pages/{3}.jsp</result>
<result name="toindex">/pages/login/goPortal.jsp</result>
</action>

3.ArrayUtil

public static Object[] unionArray(Object[] array1, Object[] array2, Object[] array3){
List<Object> tempList = new ArrayList<Object>();
for(int i=0; i<array1.length; i++){
tempList.add(array1[i]);
}
for(int i=0; i<array2.length; i++){
tempList.add(array2[i]);
}
for(int i=0; i<array3.length; i++){
tempList.add(array3[i]);
}
return tempList.toArray();
}
public static Object[] unionArray(Object[] array1, Object[] array2){
List<Object> tempList = new ArrayList<Object>();
for(int i=0; i<array1.length; i++){
tempList.add(array1[i]);
}
for(int i=0; i<array2.length; i++){
tempList.add(array2[i]);
}
return tempList.toArray();
}

public static Object[] insertNullObject(Object[] arr){
List<Object> objectList = new ArrayList<Object>();
for(int i=0; i<arr.length; i++){
objectList.add(arr[i]);
objectList.add("");
}
return objectList.toArray();
}

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标签： 内存 java jsp

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