ssm的自动类型转换器

1.jsp页面将String 转换成employee类型
<form action="testConversionServiceConverer" method="POST">
<!-- lastname-email-gender-department.id 例如: GG-gg@atguigu.com-0-105 -->
Employee: <input type="text" name="employee"/>
<input type="submit" value="Submit"/>
</form>

2。手写转换器类

@Component
public class EmployeeConverter implements Converter<String, Employee> {

@Override
public Employee convert(String source) {
if(source != null){
String [] vals = source.split("-");
//GG-gg@atguigu.com-0-105
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);
System.out.println(source + "--convert--" + employee);
return employee;
}
}
return null;
}

}

3.在springMvc.xml里进行配置

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

<!-- 配置 ConversionService -->
<bean id="conversionService"
class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
<property name="converters">
<set>
<ref bean="employeeConverter"/>
</set>
</property>
</bean>

4配置action 

@RequestMapping("/testConversionServiceConverer")
public String testConverter(@RequestParam("employee") Employee employee){
System.out.println("save: " + employee);
employeeDao.save(employee);
return "redirect:/emps";
}