SpringMVC（六）处理请求10.0

（1）Spring MVC乱码解决方法
1、页面编码

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/>

2、URL中的乱码　　
改tomcat中server.xml中Connector的port=“8080”，加上一个 URIEncoding=”utf-8”

3、配置过滤器，指定所有请求的编码
配置spring的编码过滤器，为了防止spring中post方式提交的时候中文乱码，方法：修改web.xml文件，添加spring的编码过滤器

<!-- 配置编码方式过滤器,注意一点:要配置在所有过滤器的前面 -->
  <filter>
    <filter-name>CharacterEncodingFilter</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>
  </filter>
  <filter-mapping>
    <filter-name>CharacterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

配置编码过滤器，方法：先创建filter类，再修改web.xml文件，注意的是放在spring的编码过滤器之后
filter类：

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class EncoidingFilter implements Filter {

    private String encoding="";
    @Override
    public void destroy() {
        // TODO Auto-generated method stub

    }

    
    //过滤方法  是否往下执行
    @Override
    public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain chain)
            throws IOException, ServletException {
        HttpServletRequest request=(HttpServletRequest)arg0;
        HttpServletResponse response=(HttpServletResponse)arg1;
        
        request.setCharacterEncoding(encoding);
        response.setCharacterEncoding(encoding);

        //过滤通行证
        chain.doFilter(request, response);
    }

    //根据web.xml文件的配置进行初始化  
    @Override
    public void init(FilterConfig arg0) throws ServletException {
        this.encoding = arg0.getInitParameter("Encoding");
        
    }

}

修改web.xml，添加如下配置：

<!-- 配置编码过滤 -->
   <filter>
    <filter-name>EncoidingFilter</filter-name>
    <filter-class>com.qiyuan.filter.EncoidingFilter</filter-class>
    
    <init-param>
       <param-name>Encoding</param-name>
       <param-value>utf-8</param-value>
    </init-param>
  </filter>
  
  <filter-mapping>
       <filter-name>EncoidingFilter</filter-name>
       <url-pattern>/*</url-pattern>
  </filter-mapping>

4、文件编码：将文件另存为utf-8格式
5、数据库编码
连接字符串指定编码格式：
public static String URL=“jdbc:mysql://127.0.0.1:3306/mvcdb?useUnicode=true&characterEncoding=UTF-8”

6、IDE中文件与工程的编码