数据转换&数据格式化&数据校验

public class TestCon implements Converter<String, Employee> {
    @Override
    public Employee convert(String s) {
        if(s != null){
            String[] vals = s.split("-");

            if(vals != null & vals.length == 4){

                String lastName = vals[0];
                String email = vals[1];
                Integer gender = Integer.parseInt(vals[2]);
                Department department = new Department();
                department.setId(Integer.parseInt(vals[3]));

                Employee employee = new Employee(null,lastName,email,gender,department);
                return employee;
            }
        }
        return null;
    }
}

<bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
        <property name="converters">
            <set>
                <ref bean="testCon"/>
            </set>
        </property>
    </bean>

    <mvc:annotation-driven conversion-service="conversionService"></mvc:annotation-driven>

<bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean"></bean>

@RequestMapping(value = "/emp",method = RequestMethod.POST)
    public String save(@Valid Employee employee, BindingResult result,Map<String,Object> map){

        if(result.getErrorCount() > 0){

            System.out.println("出错了");
            for(FieldError error:result.getFieldErrors()){
                System.out.println( error.getField() + ":" + error.getDefaultMessage());
            }

            //若验证出错则转向定制页面
            map.put("departments", departmentDao.getDepartments());
            return "input";
        }
        employeeDao.save(employee);
        return "redirect:/emps";
    }