作者：李伯翔刚瑋嘉军 | 来源：互联网 | 2023-10-12 20:27
效果图&＃xff1a;
代码&＃xff1a;
web.xml&＃xff1a;
修改配置
<filter><filter-name>characterEncodingFilterfilter-name><filter-class>text.web.filter.CharacterEncodingFilterfilter-class><init-param><param-name>encodingparam-name><param-value>UTF-8param-value>init-param>filter><filter-mapping><filter-name>characterEncodingFilterfilter-name><url-pattern>/*url-pattern>filter-mapping>
login.html&＃xff1a;
<html>
<head>
<meta charset&＃61;"UTF-8">
<title>Insert title heretitle>
head>
<body>
<form action&＃61;"myServlet" method&＃61;"post">
<input type&＃61;"text" name&＃61;"username"/>
<input type&＃61;"submit" value&＃61;"提交"/>
form>
body>
html>
MyServlet.java&＃xff1a;
package text.web.filter;import java.io.IOException;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;&＃64;WebServlet("/myServlet")
public class MyServlet extends HttpServlet{protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {String username &＃61; req.getParameter("username");System.out.println(username);}}
CharacterEncodingFilter.java&＃xff1a;
package text.web.filter;import java.io.IOException;import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;public class CharacterEncodingFilter implements Filter{private String encoding;public void init(FilterConfig filterConfig) throws ServletException {this.encoding&＃61;filterConfig.getInitParameter("encoding");}public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)throws IOException, ServletException {request.setCharacterEncoding(encoding);chain.doFilter(request, response);}public void destroy() {}public String getEncoding() {return encoding;}public void setEncoding(String encoding) {this.encoding &＃61; encoding;}}
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