编码问题

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编码

1. 提交方式为：get
1) 解码方式一：
 地址栏编码：paper.do?operate=conditionSearchPaper&paper.name="+ name
 后台 解码：
String asd = new String(req.getParameter("name").getBytes("ISO-8859-1"), "UTF-8");

2) 解码方式二：
 地址栏编码：paper.do?operate=conditionSearchPaper&paper.name="+ encodeURI(encodeURI(name))

 后台 解码：String name = java.net.URLDecoder.decode(req.getParameter("name"),"UTF-8");

2. 提交方式为：post
可以使用编码过滤器，过滤器配置如下：
1) 编写过滤器，代码如下：
package encoding;

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 CharacterEncodingFilter implements Filter {
private FilterConfig config = null;

private String encoding = null;

public void init(FilterConfig config) throws ServletException {

this.config = config;

}

public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
if (encoding == null) {
encoding = config.getInitParameter("encoding");
}
System.out.println("asdasdadsfasd");
request.setCharacterEncoding(encoding);
chain.doFilter(request, response);
}

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

}

2) 在web.xml中配置过滤器

<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>encoding.CharacterEncodingFilter</filter-class>
<init-param>

<!-- 定义编码格式，我用的是utf-8 -->

<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>
3) 后台获取：
String name = req.getParameter("name");