中文乱码处置办法（新手来）-Java教程-爱易网页

中文乱码处置办法（新手来）

日期：2014-05-18　浏览次数：21630 次

中文乱码处理办法（新手来）
-------------------JAVA代码------------------

Java code


package tools;

import javax.servlet.http.HttpServlet;
import javax.servlet.Filter;
import javax.servlet.FilterConfig;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.FilterChain;

public class EncodingFilter extends HttpServlet implements Filter
{
    private FilterConfig config = null;
    private String targetEncoding = "GBK";

    public void init(FilterConfig filterConfig)
    {
        this.config = filterConfig;
        this.targetEncoding = config.getInitParameter("encoding");
    }

    public void destroy()
    {
        config = null;
        targetEncoding = null;
    }

    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
                         FilterChain filterChain)
    {
        ServletRequest request = (ServletRequest) servletRequest;
        try
        {
            request.setCharacterEncoding(targetEncoding);
            filterChain.doFilter(servletRequest, servletResponse);
        }
        catch (Exception ex)
        {
            ex.printStackTrace();
        }
    }

}

------------web.xml------------

Java code



 <filter>
    <filter-name>EncodingFilter</filter-name>
    <filter-class>[color=#FF0000]db.EncodingFilter[/color]</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>[color=#0000FF]GBK[/color]</param-value>
    </init-param>
  </filter>
   <filter-mapping>
    <filter-name>EncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

-------------------------------------------

红色是类的路径，蓝色是编码，注意和jsp页面上的要一致

添加、查询数据都没问题，有没有有效请用过再说，希望能帮新学的XDJM们不再受到乱码问题的困扰，有什么不足也请老大们指出

附:只在sqlserver2000和mysql中试验过

------解决方案--------------------
写在xml文件里面，跟servlet配置一样，没有自动生成，要自己添加。比如：

XML code

<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
    version="2.4">
    
    <filter>
        <filter-name>HelloFilter</filter-name>
        <filter-class>com.tarena.filter.HelloFilter</filter-class>
    </filter> 
    <filter-mapping>
        <filter-name>HelloFilter</filter-name>
        <url-pattern>/hello</url-pattern>
    </filter-mapping> 
    
    <filter>
        <filter-name>AppendFilter</filter-name>
        <filter-class>com.tarena.filter.AppendFilter</filter-class>
    </filter> 
    <filter-mapping>
        <filter-name>AppendFilter</filter-name>
        <url-pattern>/hello</url-pattern>
    </filter-mapping> 
    
    <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>com.tarena.filter.CharacterEncodingFilter</filter-class>
        <init-param> 
            <param-name>charset</param-name>
            <param-value>gbk</param-value>
        </init-param> 
    </filter> 
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </fi

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中文乱码处置办法（新手来）

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