长东

keepalived+Nginx+tomcat 搭建集群，实现高并发、高负载体系架构，具备我们平时说的第3层、第4层和第7层交换机的功能。主要提供loadbalancing（负载均衡）和 high-availability（高可用）功能，负载均衡实现需要依赖Linux的虚拟服务内核模块（ipvs），而高可用是通过VRRP协议实现多台机器之间的故障转移服务。

Tomcat集群解决Session共享的方案： 1. 基于Cookie+Redis+Filter解决方案实现过程优缺点踩坑 2. Tomcat内置的Session复制方案实现过程优缺点 3. 使用Session粘滞方案实现形式优缺点 4. 基于Session持久化方案 5. 基于Spring-Session无侵入性方案实现过程优缺点

package com.lsm.util; import java.text.CharacterIterator; import java.text.StringCharacterIterator; /** * 用于校验一个字符串是否是合法的JSON格式 * @author liShuMin * */ public class JsonValidator { private CharacterIterator it; private char c; private int col; public JsonValidator(){ } /** * 验证一个字符串是否是合法的JSON串 * * @param input 要验证的字符串 * @return true-合法 ，false-非法 */ public boolean validate(String input) { input = input.trim(); boolean ret = valid(input); return ret; } private boolean valid(String input) { if ("".equals(input)) return true; boolean ret = true; it = new StringCharacterIterator(input); c = it.first(); col = 1; if (!value()) { ret = error("value", 1); } else { skipWhiteSpace(); if (c != CharacterIterator.DONE) { ret = error("end", col); } } return ret; } private boolean value() { return literal("true") || literal("false") || literal("null") || string() || number() || object() || array(); } private boolean literal(String text) { CharacterIterator ci = new StringCharacterIterator(text); char t = ci.first(); if (c != t) return false; int start = col; boolean ret = true; for (t = ci.next(); t != CharacterIterator.DONE; t = ci.next()) { if (t != nextCharacter()) { ret = false; break; } } nextCharacter(); if (!ret) error("literal " + text, start); return ret; } private boolean array() { return aggregate('[', ']', false); } private boolean object() { return aggregate('{', '}', true); } private boolean aggregate(char entryCharacter, char exitCharacter, boolean prefix) { if (c != entryCharacter) return false; nextCharacter(); skipWhiteSpace(); if (c == exitCharacter) { nextCharacter(); return true; } for (;;) { if (prefix) { int start = col; if (!string()) return error("string", start); skipWhiteSpace(); if (c != ':') return error("colon", col); nextCharacter(); skipWhiteSpace(); } if (value()) { skipWhiteSpace(); if (c == ',') { nextCharacter(); } else if (c == exitCharacter) { break; } else { return error("comma or " + exitCharacter, col); } } else { return error("value", col); } skipWhiteSpace(); } nextCharacter(); return true; } private boolean number() { if (!Character.isDigit(c) && c != '-') return false; int start = col; if (c == '-') nextCharacter(); if (c == '0') { nextCharacter(); } else if (Character.isDigit(c)) { while (Character.isDigit(c)) nextCharacter(); } else { return error("number", start); } if (c == '.') { nextCharacter(); if (Character.isDigit(c)) { while (Character.isDigit(c)) nextCharacter(); } else { return error("number", start); } } if (c == 'e' || c == 'E') { nextCharacter(); if (c == '+' || c == '-') { nextCharacter(); } if (Character.isDigit(c)) { while (Character.isDigit(c)) nextCharacter(); } else { return error("number", start); } } return true; } private boolean string() { if (c != '"') return false; int start = col; boolean escaped = false; for (nextCharacter(); c != CharacterIterator.DONE; nextCharacter()) { if (!escaped && c == '\\') { escaped = true; } else if (escaped) { if (!escape()) { return false; } escaped = false; } else if (c == '"') { nextCharacter(); return true; } } return error("quoted string", start); } private boolean escape() { int start = col - 1; if (" \\\"/bfnrtu".indexOf(c) < 0) { return error("escape sequence \\\",\\\\,\\/,\\b,\\f,\\n,\\r,\\t or \\uxxxx ", start); } if (c == 'u') { if (!ishex(nextCharacter()) || !ishex(nextCharacter()) || !ishex(nextCharacter()) || !ishex(nextCharacter())) { return error("unicode escape sequence \\uxxxx ", start); } } return true; } private boolean ishex(char d) { return "0123456789abcdefABCDEF".indexOf(c) >= 0; } private char nextCharacter() { c = it.next(); ++col; return c; } private void skipWhiteSpace() { while (Character.isWhitespace(c)) { nextCharacter(); } } private boolean error(String type, int col) { System.out.printf("type: %s, col: %s%s", type, col, System.getProperty("line.separator")); return false; } public static void main(String[] args){ //String jsonStr = "{\"website\":\"oschina.net\"}"; String jsonStr = "{" + " \"ccobjtypeid\": \"1001\"," + " \"fromuser\": \"李四\"," + " \"touser\": \"张三\"," + " \"desc\": \"描述\"," + " \"subject\": \"主题\"," + " \"attach\": \"3245,3456,4345,4553\"," + " \"data\": {" + " \"desc\": \"测试对象\"," + " \"dataid\": \"22\"," + " \"billno\": \"TEST0001\"," + " \"datarelation\":[" + " {" + " \"dataname\": \"关联对象1\"," + " \"data\": [" + " {" + " \"dataid\": \"22\"," + " \"datalineid\": \"1\"," + " \"content1\": \"test1\"," + " \"content2\": \"test2\"" + " }" + " ]" + " }" + " ]" + " }" + " }"; System.out.println(jsonStr+":"+new JsonValidator().validate(jsonStr)); } }

ibatis api chm 中文

jsp html5 仿windows图片查看器源码，可以下载、放大、缩小、拖动、放大某一区域

java swfupload完整webproject 多附件同时上传 进度条

dwr3.0.jar

SPringMVC+hibernate 全部jar包 ,搭建SpringMVC的全部jar包

commons-logging-1.1.1.jar，cxf-2.7.6.jar，jetty-continuation-8.1.7.v20120910.jar，jetty-http-8.1.7.v20120910.jar，jetty-io-8.1.7.v20120910.jar，jetty-server-8.1.7.v20120910.jar，jetty-util-8.1.7.v20120910.jar，neethi-3.0.2.jar，spring-asm-3.0.7.RELEASE.jar，spring-asm-3.0.7.RELEASE.jar，spring-beans-3.0.7.RELEASE.jar，spring-context-3.0.7.RELEASE.jar，spring-core-3.0.7.RELEASE.jar，spring-expression-3.0.7.RELEASE.jar，spring-web-3.0.7.RELEASE.jar，wsdl4j-1.6.3.jar，xmlschema-core-2.0.3.jar

pdfbox-1.7.1.jar，

fontbox-1.7.0.jar ，

commons-logging.jar

svn在MyEclipse的插件，直接解压，里面有说明

xfire-aegis-1.2.6.jar,xfire-annotations-1.2.6.jar,xfire-core-1.2.6.jar,xfire-java5-1.2.6.jar,xfire-jaxb2-1.2.6.jar,xfire-jaxws-1.2.6.jar,xfire-jsr181-api-1.0-M1.jar,xfire-spring-1.2.6.jar

xfire-spring-1.2.6.jar

import org.jsoup.Jsoup

MYSQL 的安装程序及安装说明书，简单好用，只有30M ，不占太多内存

这是一个 webService的Demo，对于想了解webService 非常好