Javascript 主体解析器未定义req.body

我尝试了我找到的所有可能的解决方案，但没有一个奏效。主体解析器已安装，前端也正确。当我发送表单时，url是

/addChess？name=123&hp=123&damage=123&skill=1&class=1

但是，req.body未定义。我的代码：

  var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var app = express();

// DataBase 
var mysql = require("mysql");

var con = mysql.createConnection({
    host: "localhost",
    user: "root",
    password: "",
    database: "chess"
});

con.connect(function(err) {
    if (err) {
        console.log('connecting error');
        return;
    }
    console.log('connecting success');
});



// view engine setup
app.set('views', path.join(__dirname, '/views'));
app.set('view engine', 'ejs');

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, '/public')));

// db state
app.use(function(req, res, next) {
    req.con = con;
    next();
});


app.get('/', function(req, res, next) {
    var db = req.con;

    db.query('SELECT chess.name AS name, chess.health AS health, chess.damage AS damage, skill.name AS skill, class.name AS class FROM chess, skill, class WHERE chess.class = class.classID AND chess.skillID = skill.skillID', function(err1, rows1) {
        if (err1) {
                    console.log(err1);
                }
        db.query('SELECT name,skillID FROM skill',function(err2, rows2){
            if (err2) {
                    console.log(err2);
                }
            db.query('SELECT name,classID FROM class',function(err3, rows3){
                if (err3) {
                    console.log(err3);
                }
                res.render('index', {data: rows1, skillList: rows2, classList:rows3});
            });
        });
    });

});

app.get('/addChess', function(req, res, next) {
    var db = req.con;

    var sql = {
        name: req.body.name,
        health: req.body.hp,
        damage: req.body.damage,
        skillID: req.body.skill,
        class: req.body.class
    };

    //console.log(sql);
    var qur = db.query('INSERT INTO chess SET ?', sql, function(err, rows) {
        if (err) {
            console.log(err);
        }

        res.setHeader('Content-Type', 'application/json');
        console.log(qur.sql); 
        console.log(req.headers);
        res.redirect('/');
    });
});

var server = app.listen(8081, function () {
   var host = server.address().address
   var port = server.address().port

   console.log("Example app listening at http://%s:%s", host, port)
})

module.exports = app;

---

使用GET HTTP方法提交表单时，表单字段将在querystring中发送，而

正文解析器

模块不会对其进行解析。对于解析querystring，您可以使用。

当您使用GET-HTTP方法提交表单时，表单字段在querystring中发送，而querystring不是由

主体解析器

模块解析的。要解析查询字符串，可以使用。

这些不是正文参数，而是普通请求参数。改用req.query.name等。检查此处的文档：

---

正文参数是执行HTTP POST请求时通常传递的参数

这些不是body参数，而是普通请求参数。改用req.query.name等。检查此处的文档：

正文参数是执行HTTP POST请求时通常传递的参数