老师,无论怎么改中文都乱码
index.html
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Insert title here</title> </head> <body> <p>加法计算器</p> <form action="http://localhost:8080/ServletProj/sum" method="post"> <span>加数1:</span><input type="text" name="sum1"><br /><br /> <span>加数2:</span><input type="text" name="sum2"><br /><br /> <!-- input的类型得是submit才能跳转成功!之前一直写的button死活不跳转... --> <input type="submit" value="计算" name="button"> </form> </body> </html>
SumServlet.java
package com.superj.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/sum")
public class SumServlet extends HttpServlet{
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.setCharacterEncoding("utf-8");
resp.setContentType("text/html;charset=utf-8");
resp.setCharacterEncoding("utf-8");
String ssum1 = req.getParameter("sum1");
String ssum2 = req.getParameter("sum2");
int sum1 = Integer.parseInt(ssum1);
int sum2 = Integer.parseInt(ssum2);
int sum = sum1 + sum2;
PrintWriter out = resp.getWriter();
out.println("加法计算器:");
out.println("运算结果为:"+sum);
}
}web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1"> <display-name>ServletProj</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> <servlet> <servlet-name>shop</servlet-name> <servlet-class>com.superj.servlet.ServletProj</servlet-class> </servlet> <servlet-mapping> <servlet-name>shop</servlet-name> <url-pattern>/ShopServlet</url-pattern> </servlet-mapping> <servlet> <servlet-name>computer</servlet-name> <servlet-class>com.superj.servlet.ComputerServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>computer</servlet-name> <url-pattern>/ComputerServlet</url-pattern> </servlet-mapping> <servlet> <servlet-name>sum</servlet-name> <servlet-class>com.superj.servlet.SumServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>sum</servlet-name> <url-pattern>/sum</url-pattern> </servlet-mapping> </web-app>
现在运行时正确的但是还有两个疑问想请教一下老师.
无论怎么设置,中文都是乱码的
如果去掉web.xml中的配置,而是用注解的方式,跳转之后就提示404
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