tomcat 7 Request请求参数中文乱码问题

冷不防 2024-03-31 15:08 21阅读 0赞

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## 前言 ##

Tomcat 7 默认是按ISO-8859-1进行URL[解码][Link 1]，ISO-8859-1并未包括中文字符，中文字符不能被正确解析，虽然在Tomcat8已经解决了这个问题，把默认解码格式设置成了utf-8，但是由于maven中目前最高只支持tomcat 7，所以这里说一下一个get和post都通用的方式

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### 我们先来写一个serclet ###

@WebServlet("/Servlet5")
    public class Servlet5 extends HttpServlet {
        @Override
        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            String name = request.getParameter("name");
            System.out.println(name);
    
        }
    
        @Override
        protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            this.doGet(request, response);
        }
    }

### 再写一个HTML传一个name过来 ###

<!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <body>
    <form action="Servlet5" method="get">
    <input name="name"><input type="submit">
        </form>
    </body>
    </html>

### 运行，在框里输入中文点提交 ###

![53bfa82a67c24c87a5ca7a7af9ec01bc.png][]

### 控制台打印了中文乱码 ###

![25261b3eb90640cd87bf66562761883d.png][]

### 打开刚刚创建的Servlet，在获取name之后插入下面这行代码 ###

>     name = new String(name.getBytes(StandardCharsets.ISO_8859_1), StandardCharsets.UTF_8);

![7dfb0242d36c4f4caa3fc2a49a9818f0.png][]

### 再来打印一次，已经可以正常输出了 ###

![b424a633219942f9a78b84f11c3e1e36.png][]

### 把HTML的method改成post，再提交一次，控制台打印还是正常中文字符。 ###

![8f66ef5306754eef9cd36d5347202dc0.png][]

[Link 1]: https://so.csdn.net/so/search?q=%E8%A7%A3%E7%A0%81&spm=1001.2101.3001.7020
[53bfa82a67c24c87a5ca7a7af9ec01bc.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/93b8ec5e6e75444a962e05c46cdf0fae.png
[25261b3eb90640cd87bf66562761883d.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/5d2218bf25aa40db992b7e04f137c479.png
[7dfb0242d36c4f4caa3fc2a49a9818f0.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/a63e4951d6714e53abf4f8b3a4014075.png
[b424a633219942f9a78b84f11c3e1e36.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/c18fa2d3647d44608d2539edef07290b.png
[8f66ef5306754eef9cd36d5347202dc0.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/c65b03d1f9b74215a4ddd952119df297.png