JSON.parse(hyjson).forEach(v1 =>{

                if (v1.Klx == "全部卡类型") {

                  if (v1.Zklx == "0") {

                    dj = parseFloat(wzb.S_dj);

                    zk = v1.Zk;

                    hj = parseFloat(dj * parseFloat(zk)).toFixed(2);

                  } else {

                    dj = v1.Zk;

                    zk = 1;

                    hj = v1.Zk;

                  }

                  return false;

                } else if (v1.Klx == hkm) {

                  if (v1.Zklx == "0") {

                   dj = parseFloat(wzb.S_dj);

                    zk = v1.Zk;

                    hj = parseFloat(dj * parseFloat(zk)).toFixed(2);

                  } else {

                    dj = v1.Zk;

                    zk = 1;

                    hj = v1.Zk;                  

                  }

这里满足条件就要跳出，不再循环

                  return false;

                } else {

                  if (wzb.S_sfzk == "1") {

                    dj = parseFloat(wzb.S_dj);

                    zk = zklx;

                    dj = parseFloat(wzb.S_dj);

                    zk = v1.Zk;

                    hj = parseFloat(dj * parseFloat(zk)).toFixed(2);

                  } else {

                    dj = parseFloat(wzb.S_dj);

                    zk = 1;

                    hj = parseFloat(wzb.S_dj);

                  }

                }

              });

JSON.parse(hyjson) 里有两行数据，找到符合条件的数据后不跳出，又执行了不符合条件的行数据，求大神指点，跳出