项目结构
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.itheima</groupId>
<artifactId>tomcat-demo</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<!--
此处为什么需要添加该标签?
provided指的是在编译和测试过程中有效,最后生成的war包时不会加入
因为Tomcat的lib目录中已经有servlet-api这个jar包,如果在生成war包的时候生效就会和Tomcat中的jar包冲突,导致报错
-->
<scope>provided</scope>
</dependency>
</dependencies>
</project>
ServletDemo4.java
package com.demo.web;
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.BufferedReader;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
@WebServlet("/demo4")
public class ServletDemo4 extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//TODO GET 请求方式处理逻辑
String username = req.getParameter("username");
System.out.println("get请求" + username);
resp.setContentType("text/html;charset=utf-8");
resp.getWriter().write("你真好" + username);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//TODO Post 请求方式处理逻辑
System.out.println("post请求...");
req.setCharacterEncoding("UTF-8");
doGet(req, resp);
}
}
index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" %>
<html lang="en">
<title>tomcat index jsp</title>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<h2>post请求</h2>
<form action="/tomcat_demo_war/demo4" method="post">
<input name="username"/>
<input type="submit"/>
</form>
<h2>get请求</h2>
<form action="/tomcat_demo_war/demo4" method="get">
<input name="username"/><input type="submit"/>
</form>
</body>
</html>
配置tomcat
添加编码 -Dfile.encoding=UTF-8
部署配置
修改idea配置文件,在结尾处添加 -Dfile.encoding=UTF-8
添加修改如下配置
# 如果Tomcat Catalina log乱码,修改UTF-8为GBK
1catalina.org.apache.juli.FileHandler.encoding = GBK
java.util.logging.ConsoleHandler.formatter = org.apache.juli.OneLineFormatter
# 使用idea启动时使用 解决控制台乱码问题
java.util.logging.ConsoleHandler.encoding = UTF-8
# dos窗口启动时使用 解决控制台乱码问题
# java.util.logging.ConsoleHandler.encoding = GBK
启动tomcat,验证
观察控制台日志
发送get、post请求