jdk To configure : http://jingyan.baidu.com/article/6dad5075d1dc40a123e36ea3.html
System variables → newly build JAVA_HOME Variable . Variable value filling jdk Installation directory ( I am a E:\Java\jdk1.7.0)
System variables → seek Path Variable → edit
Enter... At the end of the variable value %JAVA_HOME%\bin;%JAVA_HOME%\jre\bin;
( Pay attention to the original Path Does the value of the variable end with ; Number , without , First enter ; Enter the above code again )
System variables → newly build CLASSPATH Variable
Variable value filling    .;%JAVA_HOME%\lib;%JAVA_HOME%\lib\tools.jar( Pay attention to the first point )
System variable configuration complete
Verify that the configuration is successful function cmd Input java -version (java and -version There's a space between )
If it's as shown Display version information The installation and configuration are successful .
 
newly build Tomcat environment variable
Variable name :TOMCAT_HOME
A variable's value : Yours TOMCAT In the directory   
Now we can start running tomcat/bin/startup The file .
install jdk,eclipse,tomcat,
hold tomcat Deploy to ecplise:
Eclipse How to create JSP file ?
Steps are as follows :
1、 open Eclipse.
2、 Click on the menu “File” Then choose “New”, Re selection “Dynamic Web Project” Create a Web project .
3、 After the project is created , Launch the project .
4、 Right click “WebContent”, choice “New”, Then choose “JSP File” that will do ,
Want to be in web Output a sentence on the page :<%out.println(" Content ");%>
Access on the browser with tomcat Running events :      http://localhost:8080/webDemo/testDemo.jsp

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