- 查看JDK版本
whereis java
which java Qjava执行路径Q?br />
echo $JAVA_HOME
- 解压文g
- 修改环境变量
1.所有用L(fng)shell都有权用这些环境变?br />
用文本编辑器打开/etc/profileQ在profile文g末尾加入Q?br />
JAVA_HOME=/usr/share/jdk1.5.0_05
PATH=$JAVA_HOME/bin:$PATH
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export JAVA_HOME
export PATHexport CLASSPATH
重新d?br />
2.某个用户有权使用q些环境变量
用文本编辑器打开用户目录下的.bashrc文gQ在.bashrc文g末尾加入Q?br />
JAVA_HOME=/usr/share/jdk1.5.0_05
PATH=$JAVA_HOME/bin:$PATH
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export JAVA_HOME
export PATHexport CLASSPATH
重新d?/blockquote>
- lbin目录下的文gd执行权限
q入到bin目录下执?br />
chmod +x *.sh
- 查看java版本
java -version
- 注意Q?/strong>
1.要将 /usr/share/jdk1.5.0_05jdk 改ؓ(f)jdk安装目录
2. linux下用冒号”:”来分隔\?br />
3. $PATH / $CLASSPATH / $JAVA_HOME 是用来引用原来的环境变量的值在讄环境变量时特别要注意不能把原来的值给覆盖掉了(jin)?br />
4. CLASSPATH中当前目?#8221;.”不能丢掉?br />
5. export是把q三个变量导Zؓ(f)全局变量?br />
6. 大小写必M格区分?/blockquote>
]]>
首先在linux下安装jdkQ如果出现提C权限不?且root下也提示权限不够)Q可?ls -l filename命o(h)查看一下，如果昄cM如：(x)
-rw-rw-rw- 1 root root ….
则表CZQ何用户都没有可执行权限（即是root用户Q?br />
解决Ҏ(gu)Q?br />
#chmod a+x filename
q样Q安装好后，可以接下来q行环境变量的配|了(jin)。这里给ZU可选方法：(x)
一、修?etc/profile文g
当本Z仅作为开发用时推荐使用q种Ҏ(gu)Q因为此U配|时所有用L(fng)shell都有权用这些环境变量，可能?x)给pȝ带来安全性问题?br />
用文本编辑器打开/etc/profileQ在profile文g末尾加入Q?br />
JAVA_HOME=/usr/share/jdk1.5.0_05
PATH=$JAVA_HOME/bin:$PATH
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export JAVA_HOME
export PATH
export CLASSPATH
重新d卛_?br />
二、修?bashrc文g
q种Ҏ(gu)更ؓ(f)安全Q它可以把用这些环境变量的权限控制到用L(fng)别，如果需要给某个用户权限使用q些环境变量Q只需要修改其个h用户ȝ录下?bashrc文g可以了(jin)?br />
用文本编辑器打开用户目录下的.bashrc文gQ在.bashrc文g末尾加入Q?br />
set JAVA_HOME=/usr/share/jdk1.5.0_05
export JAVA_HOME
set PATH=$JAVA_HOME/bin:$PATH
export PATH
set CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export CLASSPATH
重新d?br />
三、直接在shell下设|变?br />
不推荐用这U方法，因ؓ(f)换个shellQ该讄无效了(jin)。这U方法仅仅是临时使用Q以后要使用的时候又要重新设|，比较ȝ(ch)?br />
只需在shelll端执行下列命o(h)Q?br />
export JAVA_HOME=/usr/share/jdk1.5.0_05
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
注意Q?br />
1.要将 /usr/share/jdk1.5.0_05jdk 改ؓ(f)jdk安装目录
2. linux下用冒号”:”来分隔\?br />3. $PATH / $CLASSPATH / $JAVA_HOME 是用来引用原来的环境变量的值在讄环境变量时特别要注意不能把原来的值给覆盖掉了(jin)?br />4. CLASSPATH中当前目?#8221;.”不能丢掉?br />5. export是把q三个变量导Zؓ(f)全局变量?br />6. 大小写必M格区分?img src ="http://www.tkk7.com/tinguo002/aggbug/417314.html" width = "1" height = "1" />
]]>
/**
* 金额格式化，每三位加?
*/function formatMoney1(money){
var str = money + ""; var result = ""; var index = str.indexOf("."); var endStr = "";
if(index>-1){
endStr = str.substring(index, str.length); endStr = endStr.length==3?endStr:endStr+"0"; str = str.substring(0, index); }else{ endStr = ".00";
} var i = 0; var len = str.length; for(i;i<len;i++){ if((len - (4 + i)) % 3 == 0 && (len - (4 + i)) >= 0){ result += str.substr(i, 1) + ","; }else{ result += str.substr(i, 1); } } return result+endStr;}]]>
]]>
public static byte[] toByteArray(InputStream input) throws IOException {
ByteArrayOutputStream output = new ByteArrayOutputStream();
byte[] buffer = new byte[4096];
int n = 0;
while (-1 != (n = input.read(buffer))) {
output.write(buffer, 0, n);
}
return output.toByteArray();
}
下面是IOUtils中摘录出与toByteArray相关的方?/span>
org.apache.commons.io.IOUtils.toByteArray
Ҏ(gu)如下:
public static byte[] toByteArray(InputStream input)
throws IOException
{
ByteArrayOutputStream output = new ByteArrayOutputStream();
copy(input, output);
return output.toByteArray();
}
public static int copy(InputStream input, OutputStream output)
throws IOException
{
long count = copyLarge(input, output);
if (count > 2147483647L) {
return -1;
}
return (int)count;
}
public static long copyLarge(InputStream input, OutputStream output)
throws IOException
{
byte[] buffer = new byte[4096];
long count = 0L;
int n = 0;
while (-1 != (n = input.read(buffer))) {
output.write(buffer, 0, n);
count += n;
}
return count;
}
文章详细出处Q?a >http://blog.csdn.net/zdwzzu2006/article/details/7745827
]]>
设虚拟目?/span> "site"Q通过 http://localhost:8080/site 讉K物理路径 D:"site 文g多w面的内容。设|过E如下：(x)
1.复制 Tomcat6.0"webapps"ROOT 目录下的 WEB-INF 文g夹到 D:"site 目录下?/span>
2.打开 D:"site"WEB-INF 目录下的 web.xml 文g,?/span> </description> 之后加入Q?/span>
<!--JSPC servlet mappings start -->
<!--JSPC servlet mappings end -->
3.打开 Tomcat6.0"conf"server.xml 文gQ在 <Host> ?/span> </Host> 之间加入Q?/span>
<Context path="/site" docBase="d:"site"></Context>
path="/site" 是虚拟目录的名U?/span>
docBase="d:"site"> 为物理\?/span>
4.打开 Tomcat6.0"conf"web.xml 文gQ找?/span>:
<init-param>
<param-name>listings</param-name>
<param-value>false</param-value>
</init-param>
?/span>false设成true保存Q重?/span>TomcatQ现在就可以应用 http://localhost:8080/site 虚拟目录?jin)?/span>
Tomcat6讄虚拟目录的方?/span>, 不修?/span>server.xml
?/span>tomcat文g夹的conf"catalina"localhost(对于Tomcat6版本?qing)其以上Q需要自己创?/span>catalina?/span>localhostq两个文件夹)
增加project .xml文gQ该文g名的project要和下面?/span>“path=“/xxx"”?/span>xxx相同Q?/span>
文g内容:
<Context path="/project" reloadable="true" docBase="E:"javastudio"oob" workDir="E:"javastudio"oob"work" />
docBase是项目文件夹?/span>web-inf文g夹的上一层目?/span>
workDir是指Tomcat解析Jsp转换?/span>Java文gQƈ~译?/span>class存放的文件夹Q设|在目文g多w面，可以避免UL到其他地斚wơ读?/span>jsp文g需要重新解?/span> 。一般格式：(x)目文g?/span>"work
reloadable是指可以重新加蝲Q一般设|ؓ(f)trueQ方便用，不需要经帔R?/span>Tomcat?/span>
以后启动TomcatQ在览器输?/span>http://localhost:8080/projectp讉K
该项目的welcome文g?/span>
转：(x)TomCat 6.0虚拟目录配置Q?/span>2008q?/span>03?/span>09?/span> 星期?/span> 13:51之前?/span>5.0下配|虚拟目录，我一般是采用?/span>conf"server.xml中增?/span><Context .../>的方法，可是此法?/span>6.0中失?/span>(后经验证有效Q可能是之前实验q程中有?/span>)。按?/span>tomcat 6.0启动之后的相x(chng)档的说明http://localhost:8080/docs/config/context.htmlQ尝试了(jin)一些方法：(x)
-----------------------------tomcat6.0文中关?/span>Context的说?/span>-------------------
You may define as many Context elements as you wish. Each such Context MUST have a unique context path. In addition, a Context must be present with a context path equal to a zero-length string. This Context becomes the default web application for this virtual host, and is used to process all requests that do not match any other Context's context path.
For Tomcat 6, unlike Tomcat 4.x, it is NOT recommended to place <Context> elements directly in the server.xml file. This is because it makes modifing the Context configuration more invasive since the main conf/server.xml file cannot be reloaded without restarting Tomcat.
Context elements may be explicitly defined:
in the $CATALINA_HOME/conf/context.xml file: the Context element information will be loaded by all webapps
in the $CATALINA_HOME/conf/[enginename]/[hostname]/context.xml.default file: the Context element information will be loaded by all webapps of that host
in individual files (with a ".xml" extension) in the $CATALINA_HOME/conf/[enginename]/[hostname]/ directory. The name of the file (less the .xml) extension will be used as the context path. Multi-level context paths may be defined using #, e.g. context#path.xml. The default web application may be defined by using a file called ROOT.xml.
if the previous file was not found for this application, in an individual file at /META-INF/context.xml inside the application files
inside a Host element in the main conf/server.xml
-------------------------------------------------------------------------------
逐一验证Q方?/span>1Q?/span>2均无效，成功的有以下2U：(x)(下文?/span>%tomcat%表示Tomcat6.0的安装目录，希望在浏览器中通过http://localhost:8080/abc/default.jsp 来访?/span>d:"myJsp"default.jsp)
Ҏ(gu)一Q?/span>(文中说不徏议?/span>)
扑ֈ%tomcat%"conf"server.xmlQ在</Host>之前加入Q?/span>
<Context docBase="d:"myJsp" path="/abc" />
保存文g之后Q重?/span>Tomcat卛_。注意：(x)大小写不能错! 斜杆"/"?/span>"""的方向别搞错?/span>
Ҏ(gu)二：(x)该方法推荐用，比较单?/span>
?/span>%tomcat%"conf"Catalina"locahost(该目录可能需要手工创?/span>)下新Z个文?/span>abc.xmlQ注意文件名中的abcpC拟目录的名称Q所以不可随意命名，该文件的内容?/span>:
<Context docBase="d:"myJsp" />
重启Tomcat卛_?/span>
-------------------------------------------------------------------------------------------
其它讄Q当url中未明确指定文g名时Q是否列出相关目录下所有文件的开兌|：(x)
打开 %tomcat%"conf"web.xml 文gQ找?/span>:
<init-param>
<param-name>listings</param-name>
<param-value>false</param-value>
</init-param>
?/span>falseҎ(gu)true卛_?/span>
-------------------------------------------------------------------------------------------
其他人的同类l验Q?/span>http://fengzhiyu-sh.javaeye.com/blog/153506 l验证无需讄文中?/span>web application下的web.xml文g?/span>
文章详细参考：(x)http://www.cnblogs.com/bingoidea/archive/2009/06/06/1497787.html
]]>
import java.io.BufferedReader;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileOutputStream;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;public class UrlResource { public static void main(String[] args){ try { System.out.println(UrlResource.getUrlDetail("http://www.baidu.com",true)); saveUrlFile("http://www.baidu.com/img/baidu_jgylogo3.gif", "D:\\1.gif"); } catch (Exception e) { e.printStackTrace(); } } //获取|络文gQ{存到fileDes中，fileDes需要带文g后缀?/span> public static void saveUrlFile(String fileUrl,String fileDes) throws Exception { File toFile = new File(fileDes); if (toFile.exists()) {// throw new Exception("file exist"); return; } toFile.createNewFile(); FileOutputStream outImgStream = new FileOutputStream(toFile); outImgStream.write(getUrlFileData(fileUrl)); outImgStream.close(); } //获取链接地址文g的byte数据 public static byte[] getUrlFileData(String fileUrl) throws Exception { URL url = new URL(fileUrl); HttpURLConnection httpConn = (HttpURLConnection) url.openConnection(); httpConn.connect(); InputStream cin = httpConn.getInputStream(); ByteArrayOutputStream outStream = new ByteArrayOutputStream(); byte[] buffer = new byte[1024]; int len = 0; while ((len = cin.read(buffer)) != -1) { outStream.write(buffer, 0, len); } cin.close(); byte[] fileData = outStream.toByteArray(); outStream.close(); return fileData; } //获取链接地址的字W数据，wichSep是否换行标记 public static String getUrlDetail(String urlStr,boolean withSep) throws Exception { URL url = new URL(urlStr); HttpURLConnection httpConn = (HttpURLConnection)url.openConnection(); httpConn.connect(); InputStream cin = httpConn.getInputStream(); BufferedReader reader = new BufferedReader(new InputStreamReader(cin,"UTF-8")); StringBuffer sb = new StringBuffer(); String rl = null; while((rl = reader.readLine()) != null) { if (withSep) { sb.append(rl).append(System.getProperty("line.separator")); } else { sb.append(rl); } } return sb.toString(); } }// 止囑փ~存
response.setHeader("Pragma", "no-cache");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader("Expires", 0);
文章详细参考：(x)http://blog.csdn.net/pandakong/article/details/7430844
]]>