Servlet common solutions garbled

Servlet common solution to the garbage problem

public class Servlet01 extends HttpServlet {

    public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // 让浏览器使用 utf-8 解码 
        resp.setContent("text/html;charset=utf-8");
        
        // 通过指定 (请求体) 编码格式解决
        req.setCharacterEncoding("utf-8");
        
    }

    public void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}

Garbled reasons:

1. The encoding is not uniform (basically because of this)
2. Data Loss

servlet response garbled

Possible causes: The browser defaults to using iso-8859-1 decoding

// 让浏览器使用 utf-8 解码 
resp.setContent("text/html;charset=utf-8");

servlet request garbled

Possible causes: getParameter () default parameters using iso-8859-1 encoding acquired

// 通过指定 (请求体) 编码格式解决
req.setCharacterEncoding("utf-8");
// get 请求不需要解决

Database garbled

1. Url when the connection is set to:

useUnicode=true&chaeracterEncoding=utf8

1. When the database creation is set to utf-8 encoding