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1.产生原因
在项目中从JSP页面传回来的中文在后台接受时变为乱码,因为JSP默认参数在传输过程中使用的编码为ISO-8859-1,而页面常用的是UTF-8编码,所以导致中文传回来是乱码,而英文没问题,ISO-8859-1就是英文编码。
UTF-8是国际网络通用编码,是Unicode编码的网络实现版,当然兼容中英文。
关于计算机编码,我可以推荐一个知乎上文章,链接如下:
2.最佳解决方法
2.1.在后台编写filter,将请求的参数都转换为UTF-8,代码如下:
package com.zy.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;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class EncodingFilter implements Filter{
@Override
public void destroy() {
// TODO Auto-generated method stub
}
@Override
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
throws IOException, ServletException {
//doFilter方法的第一个参数req,是ServletRequest 类型的,不支持setCharacterEncoding,
//所以要先强制转换为HttpServletRequest
HttpServletRequest request = (HttpServletRequest)req;
HttpServletResponse response = (HttpServletResponse)res;
req.setCharacterEncoding(""UTF-8"");
chain.doFilter(request, response);
}
@Override
public void //代码效果参考:https://v.youku.com/v_show/id_XNjQwMDQxMTUzMg==.html
init(FilterConfig arg0) throws ServletException {// TODO Auto-generated method stub
}
}
2.2.修改web.xml配置,添加编码filter,代码如下:
[/span>filter
[/span>filter-name
[/span>filter-class
[/span>filter-mapping
//代码效果参考:https://v.youku.com/v_show/id_XNjQwMDQwNjkxMg==.html
[/span>filter-name[/span>url-pattern
"