小魏
posts - 27,comments - 2,trackbacks - 0
2013年7月18日
基于nginx负载均衡的理解
做个总结
linux服务器上做负载均衡
自己准备的:linux服务器(45.78.20.168),jdk1.7,nginx,redis,tomcat7两个,部署的项目;

1:jdk1.7安装,两个tomcat分别端口8080,8081;部署相同的项目;启动;
    http://45.78.20.168:8080/redis3.2/getRedis.action
    http://45.78.20.168:8081/redis3.2/getRedis.action
2:安装nginx,添加负载的配置,安装目录下找 /etc/nginx/conf.d/default.conf文件(或/etc/nginx/nginx.conf);策略设置为默认轮询;
    upstream www.nimenhaihaoma.com {
        server 45.78.20.168:8080;
        server 45.78.20.168:8081;
    }
    server{
        listen 80;
        server_name www.nimenhaihaoma.com;
        location / {
            proxy_pass http://www.nimenhaihaoma.com;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }
3:配置session共享,方式很多,这里用的redis的session共享(兼容jdk版本至少1.7):
    tomcat的lib包加commons-pool2-2.0.jar,jedis-2.5.2.jar,tomcat-redis-session-manager1.2.jar;
    tomcat配置文件context.xml,在标签<Context>内添加配置:
        <Valve className="com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve" />
        <Manager className="com.orangefunction.tomcat.redissessions.RedisSessionManager" host="localhost" port="6379" database="0" maxInactiveInterval="60" />

4:项目里面区分session的代码:
    (1):放session的接口(执行一次);
    (2):取session数据(不断刷新),看tomcat打印信息;
5:效果,http://www.nimenhaihaoma.com/redis3.2/getRedis.action (狂刷session值相同)



posted @ 2016-08-17 17:03 魏文甫 阅读(119) | 评论 (0) | 编辑 收藏
spring定时器的一些问题
项目只是加载spring的几个定时任务，启动服务一直循环加载spring文件，问题的根节点：定时器类里面的service对象采取配置的方式注入，而这个定时器类的构造让我给加上了:
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext*.xml");
myServiceImpl = context.getBean("XXXService");

加上这段为了方便测试，在该类里写main方法测试执行，把调用写到构造里；，spring定时器配置好时间后，此处构造忘了去掉；导致启动tomcat服务一直在加载spring注入文件；
同理，spring注入的方式，在action里同样有这样的效果，构造方法一定注意；
posted @ 2015-04-25 11:09 魏文甫 阅读(175) | 评论 (0) | 编辑 收藏
java 类是公共的，应在名为.java 的文件中声明
是在build.xml编译的时候,包里有两个类名一样的java文件,我只是做了个备份,忘了改文件后缀,备份的文件也编译了,所以报的这个错
posted @ 2014-08-28 20:18 魏文甫 阅读(806) | 评论 (0) | 编辑 收藏
简单的添加、删除、更新索引文件中的索引
1，添加索引文件中的一条新的索引     
                Question addQ = new Question();//新添加的一条数据,对象id在索引文件中没有
                addQ.setId("999999999");
                addQ.setQuestionname("新添加的一条数据名称");
                Analyzer sa = new SmartChineseAnalyzer(Version.LUCENE_40);
IndexWriterConfig iwc = new IndexWriterConfig(Version.LUCENE_40, sa);
iwc.setOpenMode(OpenMode.APPEND);
IndexWriter writer = null;
try {
Directory dir1 = FSDirectory.open(new File("F:\\temp"));
writer = new IndexWriter(dir1, iwc);
FieldType ft = new FieldType();
ft.setIndexed(true);
ft.setStored(true);
ft.setTokenized(true);
FieldType ft2 = new FieldType();
ft2.setIndexed(true);
ft2.setStored(true);
ft2.setTokenized(false);
Document doc = new Document();
doc.add(new Field("id", addQ.getId(), ft2));
doc.add(new Field("questionname", addQ.getQuestionname(), ft));
writer.addDocument(doc);
writer.close();
} catch (CorruptIndexException e) {
e.printStackTrace();
} catch (LockObtainFailedException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally{
try {
if(writer!=null){
writer.close();
}
if(sa!=null){
sa.close();
}
} catch (CorruptIndexException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
执行完程序后，索引文件中已经添加新的索引数据。
2，删除索引文件中的一条新的索引
                Question delQ = new Question();//索引文件中有的一条数据，根据对象id删
                delQ.setId("1111111");
                delQ.setQuestionname("要删除的一条数据");
                IndexWriter writer = null;
Analyzer sa = new SmartChineseAnalyzer(Version.LUCENE_40);
IndexWriterConfig iwc = new IndexWriterConfig(Version.LUCENE_40, sa);
Directory dir1 = null;
try {
dir1 = FSDirectory.open(new File("F:\\temp"));
writer = new IndexWriter(dir1, iwc);
Term term = new Term("id", delQ.getId());
writer.deleteDocuments(term);
writer.commit();
writer.close();
} catch (CorruptIndexException e) {
e.printStackTrace();
} catch (LockObtainFailedException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (writer != null) {
writer.close();
sa.close();
}
} catch (CorruptIndexException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
System.out.println("索引删除完成");
3，更新索引文件中的一条索引
更新索引文件中的一条索引的理念是：先找到这条索引删除，然后再添加这条更新后的索引

posted @ 2013-08-16 12:08 魏文甫 阅读(335) | 评论 (0) | 编辑 收藏
简单的lucene根据索引文件查询(搜索引擎)
                IndexReader reader = DirectoryReader.open(FSDirectory.open(new File("F:\\temp")));// 打开索引
IndexSearcher searcher = new IndexSearcher(reader);
Analyzer analyzer = new SmartChineseAnalyzer(Version.LUCENE_40);
String[] fields = { "questionname","id" };
Occur[] occurs = new Occur[] { Occur.SHOULD,Occur.SHOULD };
Query query =  MultiFieldQueryParser.parse(Version.LUCENE_40, "测试 的", fields,
occurs, analyzer);
TopDocs result = searcher.search(query, searcher.getIndexReader()
.maxDoc());
ScoreDoc[] hits = result.scoreDocs;
List<Document> list = new ArrayList<Document>();
for (int i = 0; i <hits.length; i++) {
Document doc = searcher.doc(hits[i].doc);
list.add(doc);
}
System.out.println("搜索list的长度\t→→→→\t"+list.size());
for (Document document : list) {
System.out.println(document.getField("questionname"));
}
analyzer.close();

注：红色字体是输入的检索条件，多个用空格隔开，找到的结果先匹配同时符合多个的结果，结果只是拿过来的document一个list集合，具体结果再解析就行了。

结果如图：
posted @ 2013-08-12 17:26 魏文甫 阅读(1167) | 评论 (1) | 编辑 收藏
简单的lucene创建索引文件
                Connection conn = null;
Statement stat = null;
ResultSet rs = null;
Analyzer sa = new SmartChineseAnalyzer(Version.LUCENE_40);
IndexWriterConfig iwc = new IndexWriterConfig(Version.LUCENE_40, sa);
iwc.setOpenMode(OpenMode.CREATE);
Directory dir1 = FSDirectory.open(new File("F:\\temp"));
IndexWriter writer = new IndexWriter(dir1, iwc);
int numIndexed = -1;
FieldType ft = new FieldType();
ft.setIndexed(true);
ft.setStored(true);
ft.setTokenized(true);
FieldType ft2 = new FieldType();
ft2.setIndexed(true);
ft2.setStored(true);
ft2.setTokenized(false);
Class.forName("com.mysql.jdbc.Driver");
conn = (Connection) DriverManager.getConnection(
"jdbc:mysql:///question", "root", "root");
stat = (Statement) conn.createStatement();
rs = stat.executeQuery("select id,questionname from question");
List<String> list = new ArrayList<String>();
while (rs.next()) {
String id = rs.getString("questionname");
String questionname = rs.getString("questionname");
list.add(id);
list.add(questionname);
}
rs.close();
stat.close();
conn.close();
for (String string : list) {
Document doc = new Document();
doc.add(new Field("questionname", string, ft2));
writer.addDocument(doc);
}
numIndexed = writer.maxDoc();
writer.close();
执行完这段程序f盘多一个文件夹temp，里面就是创建好的索引文件了，然后进行根据索引文件查询
posted @ 2013-08-12 16:50 魏文甫 阅读(1412) | 评论 (0) | 编辑 收藏
简单的滑轮滚动出现"回到顶端"
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=GBK" />
<title></title>
<script type="text/javascript" src="jquery-1.8.2.js"></script>
<script type="text/javascript">
$(document).mousemove(function(e) {
var innerHeight = window.innerHeight;
if (e.pageY > innerHeight) {
$("#topDiv").css("display", "block");
}
if (e.pageY < innerHeight) {
$("#topDiv").css("display", "none");
}
});
$("#topIcon").mouseover(function() {
$("#topIcon").css("text-decoration", "none");
$("#topIcon").children("i").removeClass();
$("#topIcon").children("i").addClass("icon-chevron-up");
});
$("#topIcon").mouseout(function() {
$("#topIcon").children("i").removeClass();
$("#topIcon").children("i").addClass("icon-arrow-up");
});
</script>
</head>
<body id="bodyId">
<div id="topDiv"
style="position: fixed;right: 60px;bottom: 60px;display: none">
<a id="topIcon" href="#bodyId" style="background-color: #aaaaaa"><span
style="text-align: justify;display: block;text-decoration: none;width: 14px;background-color: #cccccc">回到顶端</span>
</a>
</div>
<h1>O(∩_∩)O哈哈~</h1>
<h2>(*^__^*) 嘻嘻……</h2>
<h3>O(∩_∩)O~</h3>
<h4>\(^o^)/~</h4>
<h5>$_$</h5>
<h6>o(╯□╰)o</h6>
<h1>O(∩_∩)O哈哈~</h1>
<h2>(*^__^*) 嘻嘻……</h2>
<h3>O(∩_∩)O~</h3>
<h4>\(^o^)/~</h4>
<h5>$_$</h5>
<h6>o(╯□╰)o</h6>
<h1>O(∩_∩)O哈哈~</h1>
<h2>(*^__^*) 嘻嘻……</h2>
<h3>O(∩_∩)O~</h3>
<h4>\(^o^)/~</h4>
<h5>$_$</h5>
<h6>o(╯□╰)o</h6>
<h1>O(∩_∩)O哈哈~</h1>
<h2>(*^__^*) 嘻嘻……</h2>
<h3>O(∩_∩)O~</h3>
<h4>\(^o^)/~</h4>
<h5>$_$</h5>
<h6>o(╯□╰)o</h6>
<h1>O(∩_∩)O哈哈~</h1>
<h2>(*^__^*) 嘻嘻……</h2>
<h3>O(∩_∩)O~</h3>
<h4>\(^o^)/~</h4>
<h5>$_$</h5>
<h6>o(╯□╰)o</h6>
<h1>O(∩_∩)O哈哈~</h1>
<h2>(*^__^*) 嘻嘻……</h2>
<h3>O(∩_∩)O~</h3>
<h4>\(^o^)/~</h4>
<h5>$_$</h5>
<h6>o(╯□╰)o</h6>
<h1>O(∩_∩)O哈哈~</h1>
<h2>(*^__^*) 嘻嘻……</h2>
<h3>O(∩_∩)O~</h3>
<h4>\(^o^)/~</h4>
<h5>$_$</h5>
<h6>o(╯□╰)o</h6>
<h1>O(∩_∩)O哈哈~</h1>
<h2>(*^__^*) 嘻嘻……</h2>
<h3>O(∩_∩)O~</h3>
<h4>\(^o^)/~</h4>
<h5>$_$</h5>
<h6>o(╯□╰)o</h6>
</body>
</html>
posted @ 2013-08-07 10:35 魏文甫 阅读(207) | 评论 (0) | 编辑 收藏
求单一登陆和单点登陆的思路及核心代码？？？
求单一登陆和单点登陆的思路及核心代码？？？
posted @ 2013-08-07 09:56 魏文甫 阅读(319) | 评论 (0) | 编辑 收藏
html中中文正则表达式不对的问题
html中中文正则表达式不对的问题 
中文的正则表达式：var reg = /^[\u4e00-\u9fa5]$/;(一个中文字符)
放在html中可能出现的问题有：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<title></title>
</head>
<body>
<script type="text/javascript">
            var reg0 = /^[\u4e00-\u9fa5]$/;
            alert(reg0.test("看"));
</script>
</body>
</html>
本页编码为UTF-8时出现的结果可能是错误的，
所以出现此类情况，编码格式改为gb2312(红色标注的编码改为gb2312)
posted @ 2013-07-29 15:56 魏文甫 阅读(219) | 评论 (0) | 编辑 收藏
将一个带格式的excel表内容(带格式)写入一个与之有相同列的excel表格中(追加写)
简单的代码:
public static void main(String[] args) {
try {
File allfile = new File("f:\\excel\\total.xlsx");
File file2 = new File("f:\\excel\\xxxxxx.xlsx");
XSSFWorkbook h = new XSSFWorkbook(new FileInputStream(allfile));
XSSFSheet x = h.getSheetAt(0);
XSSFWorkbook hssfWorkbook = new XSSFWorkbook(new FileInputStream(file2));
XSSFSheet hssfSheet = hssfWorkbook.getSheetAt(0);
int ii = hssfSheet.getLastRowNum();//读取的表格行数
System.out.println(ii);
FileOutputStream out_ = new FileOutputStream(allfile);
for (int i = 0; i < ii; i++) {
XSSFRow lastRow = x.createRow(x.getLastRowNum()+1);
XSSFRow xssfRow = hssfSheet.getRow(i);
XSSFCell xssfCell0 = xssfRow.getCell(0);
CellStyle cellStyle0 = xssfCell0.getCellStyle();
CellStyle newStyle0 = h.createCellStyle();
newStyle0.cloneStyleFrom(cellStyle0);
XSSFCell xssfCell0_ = lastRow.createCell(0);
xssfCell0_.setCellStyle(newStyle0);
xssfCell0_.setCellValue(xssfCell0.toString());
XSSFCell xssfCell1 = xssfRow.getCell(1);
CellStyle cellStyle1 = xssfCell1.getCellStyle();
CellStyle newStyle1 = h.createCellStyle();
newStyle1.cloneStyleFrom(cellStyle1);
XSSFCell xssfCell1_ = lastRow.createCell(1);
xssfCell1_.setCellStyle(newStyle1);
xssfCell1_.setCellValue(xssfCell1.toString());
XSSFCell xssfCell2 = xssfRow.getCell(2);
CellStyle cellStyle2 = xssfCell2.getCellStyle();
CellStyle newStyle2 = h.createCellStyle();
newStyle2.cloneStyleFrom(cellStyle2);
XSSFCell xssfCell2_ = lastRow.createCell(2);
xssfCell2_.setCellStyle(newStyle2);
xssfCell2_.setCellValue(xssfCell2.toString());
XSSFCell xssfCell3 = xssfRow.getCell(3);
CellStyle cellStyle3 = xssfCell3.getCellStyle();
CellStyle newStyle3 = h.createCellStyle();
newStyle3.cloneStyleFrom(cellStyle3);
XSSFCell xssfCell3_ = lastRow.createCell(3);
xssfCell3_.setCellStyle(newStyle3);
xssfCell3_.setCellValue(xssfCell3.toString());
XSSFCell xssfCell4 = xssfRow.getCell(4);
CellStyle cellStyle4 = xssfCell4.getCellStyle();
CellStyle newStyle4 = h.createCellStyle();
newStyle4.cloneStyleFrom(cellStyle4);
XSSFCell xssfCell4_ = lastRow.createCell(4);
xssfCell4_.setCellStyle(newStyle4);
xssfCell4_.setCellValue(xssfCell4.toString().toString());
}
h.write(out_);
out_.flush();
out_.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
posted @ 2013-07-19 18:02 魏文甫 阅读(626) | 评论 (0) | 编辑 收藏
javascript里离开当前页面时的提示
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=GBK" />
<title></title>
</head>
<body>
<h1>提示离开当前页面的js代码</h1>
<a href="http://www.baidu.com">百度链接</a>
<script type="text/javascript">
if (window != top) {
top.location.href = "login.action";
} else {
if (window.Event) {
window.onbeforeunload = function(event) {
return "你是否要离开此页面,离开此页面信息将不被保存!";
};
} else {
window.onbeforeunload = function() {
return "你是否要离开此页面,离开此页面信息将不被保存!";
};
}
}
</script>
</body>
</html>
posted @ 2013-07-18 15:04 魏文甫 阅读(244) | 评论 (0) | 编辑 收藏
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