1、目录结构
2、各文件内容
index.jsp
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<%@ page contenttype="text/html;charset=utf-8" language="java" %>
<html>
<head>
<title>$title$</title>
</head>
<body>
<form action="/servlet" method="post">
<input type="submit" value="提交">
</form>
</body>
</html>
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web.xml
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<?xml version="1.0" encoding="utf-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"
xsi:schemalocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<servlet>
<servlet-name>servlet</servlet-name>
<servlet-class>web.servlet.servlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>servlet</servlet-name>
<url-pattern>/servlet</url-pattern>
</servlet-mapping>
</web-app>
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servlet.java
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package web.servlet;
import javax.servlet.servletexception;
import javax.servlet.annotation.webservlet;
import javax.servlet.http.httpservlet;
import javax.servlet.http.httpservletrequest;
import javax.servlet.http.httpservletresponse;
import java.io.ioexception;
@webservlet(name = "servlet")
public class servlet extends httpservlet {
protected void dopost(httpservletrequest request, httpservletresponse response) throws servletexception, ioexception {
system.out.println("dopost()...");
}
protected void doget(httpservletrequest request, httpservletresponse response) throws servletexception, ioexception {
system.out.println("doget()...");
}
}
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正常运行后运行后，server控制台会出现输出“dopost()...”字符
3、当未配置web.xml时，出现的错误提示
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<?xml version="1.0" encoding="utf-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"
xsi:schemalocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
</web-app>
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解决方法：在web.xml中配置相关信息，或在servlet.java注解中添加内容：
@webservlet(name = "servlet",urlpatterns = "/servlet")
4、配置web.xml文件但未覆写doget()和dopost()方法，或未覆写相对应的方法出现的错误提示
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package web.servlet;
@webservlet(name = "servlet")
public class servlet extends httpservlet {
}
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package web.servlet;
import javax.servlet.servletexception;
import javax.servlet.annotation.webservlet;
import javax.servlet.http.httpservlet;
import javax.servlet.http.httpservletrequest;
import javax.servlet.http.httpservletresponse;
import java.io.ioexception;
@webservlet(name = "servlet")
public class servlet extends httpservlet {
protected void doget(httpservletrequest request, httpservletresponse response) throws servletexception, ioexception {
system.out.println("doget()...");
}
}
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以上这篇基于创建web项目运行时出错的解决方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：http://www.cnblogs.com/gdwkong/archive/2017/08/29/7442697.html