根据接口文档中的入参，生成自动化测试用例的异常测试用例

@Test
    public void TestapiVar() {
        List<ApiCaseBean> list = apiCaseService.CheckMustVar(1);
        System.out.println(list);
        System.out.println(list.size());
        int max = 0;
        String body = null;
        for (int i = 0; i < list.size(); i++) {
            String var = list.get(i).getVal();
            var = "请求中未传入" + var + "验证返回" + var + "~~更多断言";
            System.out.println(var);
            StringBuffer sb = new StringBuffer();
            body = "{ \n";
            for (int j = 0; j < list.size(); j++) {

                if (list.get(i).getVal() != list.get(j).getVal()) {
                    Random random = new Random();
                    max = list.get(j).getInputLenght();
                    sb = new StringBuffer("");
                    for (int k = 0; k < max; k++) {

                        sb.append(ALLCHAR.charAt(random.nextInt(ALLCHAR.length())));
                    }

                    body = body + "\"" + list.get(j).getVal() + "\",\"" + sb + "\"; \n";


                }
            }
            body = body + "\n }";
            System.out.println(body);
        }
    }