jsp过滤器中文乱码解决

CharseterEncodingFilter1.java

private FilterConfig config = null;

private String defaultCharset = "utf-8";

public void doFilter(ServletRequest request, ServletResponse response,

FilterChain chain) throws IOException, ServletException {

HttpServletRequest req = (HttpServletRequest) request;

HttpServletResponse resp = (HttpServletResponse) response;

String charset = config.getInitParameter("charset");

if(charset==null){

charset = defaultCharset;

}

request.setCharacterEncoding(charset);

//有时候response不用设置编码，因为servlet一般不做输出，

//输出交由jsp来做，所以只要jsp页面设定编码即可

resp.setCharacterEncoding(charset);

resp.setContentType("text/html;charset="+charset);

chain.doFilter(req, resp);

}

public void init(FilterConfig filterConfig) throws ServletException {

this.config = filterConfig;

}

Web.xml

<filter>

<filter-name>charseterEncodingFilter1</filter-name>

<filter-class>cn.class3g.web.filter.CharseterEncodingFilter1</filter-class>

</filter>

<filter-mapping>

<filter-name>charseterEncodingFilter1</filter-name>

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

</filter-mapping>

Index.jsp

<form action="/Filter_Test/servlet/TestCharsetServlet" method="post" >

城市：<input type="text" name="city" value="保定"/> <br/>

<input type="submit" value="提交" />

</form>

TestCharsetServlet.java

public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

String city = request.getParameter("city");

response.getWriter().write(city);

}

public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

String city = request.getParameter("city");

response.getWriter().write(city);

}

l将表单的method改为get再次测试，乱码。因为此种办法不能解决get方式的乱码问题