处理中文乱码问题（一）

中文乱码的产生

当我们在jsp页面进行输入信息的时候，将输入的信息展示在Java控制台上时，产生了中文乱码。

处理中文乱码

方法一

在WEB-INF目录下的web.xml文件中进行配置，添加过滤器，调用spring框架中org.springframework.web.filter.CharacterEncodingFilter，并且指定编码集encoding的初始化参数为UTF-8，并且指定第二个参数forceEncoding为true，后面添加filter-mapping的拦截请求为/*所有请求。

  <filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

方法二

调用自己的过滤器进行配置，在web.xml中进行如下配置，对所有的/*进行拦截

 <filter>
    <filter-name>encoding</filter-name>
    <filter-class>com.yanyi.oa.global.EncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>utf-8</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>encoding</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

对应的过滤器代码中，写入utf-8编码

public class EncodingFilter implements Filter {
    private String encoding="utf-8";
    //初始化方法读取初始化参数，若有指定的编码，就按指定编码处理，否则
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        if (filterConfig.getInitParameter("encoding")!= null){
            encoding = filterConfig.getInitParameter("encoding");
        }
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest httpServletRequest = (HttpServletRequest) servletRequest;
        HttpServletResponse httpServletResponse = (HttpServletResponse) servletResponse;
        httpServletRequest.setCharacterEncoding(encoding);
        httpServletResponse.setCharacterEncoding(encoding);
        filterChain.doFilter(httpServletRequest,httpServletResponse);
    }

    @Override
    public void destroy() {

    }
}

结果

这样就成功的处理了中文乱码问题