解决Servlet中GET请求参数为中文时出现乱码

Posted 2022-02-12

服务器：Tomcat 7.0.xx
在Servlet的doGet方法中添加以下代码：

String str = request.getParameter("username");
byte[] bytes = str.getBytes("iso-8859-1");
str = new String(bytes, "utf-8");

例子：

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

        String str = request.getParameter("username");
        byte[] bytes = str.getBytes("iso-8859-1");
        str = new String(bytes, "utf-8");

        System.out.println(str);
    

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当服务器：Tomcat 8.0.xx时，不需要输入 以上代码，可以直接输出

例子：

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

        String str = request.getParameter("username");
        System.out.println(str);