解决servlet的web页面乱码问题

例子：

HttpServletRequest request=(HttpServletRequest) req;
HttpServletResponse response=(HttpServletResponse) res;
//实现web页面显示
PrintWriter out=response.getWriter();
String str="二货";
out.println(str);

结果：

解决方法：

HttpServletRequest request=(HttpServletRequest) req;
HttpServletResponse response=(HttpServletResponse) res;
//添加
response.setContentType("text/html;charset=utf-8");
//实现web页面显示
PrintWriter out=response.getWriter();
String str="二货";
out.println(str);

结果：