utf-8編碼基礎

package com.luojin.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 FilterOne implements Filter{

   String  encoding;

//要消耗了

public void destroy() {

}

@Override

public void doFilter(ServletRequest req, ServletResponse resp,

FilterChain chain) throws IOException, ServletException {

req.setCharacterEncoding(encoding);

resp.setCharacterEncoding(encoding);

chain.doFilter(req, resp);

}

//在響應前調用

public void init(FilterConfig config) throws ServletException {

encoding =config.getInitParameter("encoding");

}

}

<!--設置全局過濾字體  -->

    <filter-name>interceptionEncod</filter-name>

   <filter-class>com.luojin.web.filter.FilterOne</filter-class>

  <init-param>

   <param-name>encoding</param-name>

   <param-value>utf-8</param-value>

 </init-param>

  </filter>

  <filter-mapping>

<filter-name>interceptionEncod</filter-name>

<url-pattern>/*</url-pattern>

 </filter-mapping>

model service dao