Several methods to solve Tomcat garbled code

Several methods to solve the problem of Chinese garbled characters in Tomcat, need specific code examples

In web development, we often encounter the problem of Chinese garbled characters in Tomcat. This problem will cause garbled characters or appear as boxes, question marks and other characters when processing Chinese characters, bringing a bad experience to users. In order to solve this problem, this article will introduce several commonly used methods and provide specific code examples.

1. Modify the Tomcat configuration file

Find the conf/server.xml file in the Tomcat installation directory and search for the default Connector configuration (usually the Port is 8080). Add URIEncoding="UTF-8" parameter. Specific examples are as follows:

<Connector port="8080" protocol="HTTP/1.1"
           connectionTimeout="20000"
           redirectPort="8443"
           URIEncoding="UTF-8" />

In this way, Tomcat can be processed with UTF-8 encoding to solve the problem of Chinese garbled characters.

2. Set request encoding and response encoding

In Servlet, you can handle Chinese garbled characters by setting request encoding and response encoding. Specific code examples are as follows:

request.setCharacterEncoding("UTF-8"); // 设置请求编码为UTF-8
response.setCharacterEncoding("UTF-8"); // 设置响应编码为UTF-8

In this way, you can ensure that the character encoding of the request and response is consistent and avoid the problem of Chinese garbled characters.

3. Use filters to uniformly process character encoding

In actual development, you can write a filter to uniformly process character encoding. The specific code examples are as follows:

import javax.servlet.*;
import java.io.IOException;

public class EncodingFilter implements Filter {
    private String encoding;

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        encoding = filterConfig.getInitParameter("encoding");
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        request.setCharacterEncoding(encoding);
        response.setCharacterEncoding(encoding);
        chain.doFilter(request, response);
    }

    @Override
    public void destroy() {

    }
}

Configure the filter in the web.xml file:

<filter>
    <filter-name>EncodingFilter</filter-name>
    <filter-class>your.package.EncodingFilter</filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>UTF-8</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>EncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

In this way, character encoding settings can be automatically set for each request and response to avoid Chinese garbled characters problem.

The above are several commonly used methods to solve the problem of Chinese garbled characters in Tomcat. Specific code examples can be adjusted and expanded according to the actual situation. Through correct character encoding settings, we can effectively deal with the problem of Chinese garbled characters and improve user experience. I hope this article will help you solve the problem of Chinese garbled characters in Tomcat.

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