java培训技术自定义类型转换器示例

package com.ud.handlers;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestParam;

import com.ud.dao.EmployeeDao;

import com.ud.entities.Employee;

@Controller

public class TypeConversionHandler {

@Autowired

private EmployeeDao employeeDao ;

// String -> Employee 需要类型转换器帮忙

@RequestMapping(“/empAdd”)

public String empAdd(@RequestParam(value=”employee”) Employee employee){

System.out.println(“TypeConversionHandler – ” + employee);

employeeDao.save(employee);

return “redirect:/empList”;

}

}

package com.verter;

import verter.Converter;

import org.springframework.stereotype.Component;

import com.ud.entities.Department;

import com.ud.entities.Employee;

/**

 * 将字符串转换为Employee对象类型

 */

@Component

public class StringToEmployeeConverter implements Converter<String, Employee> {

@Override

public Employee convert(String source) {

if(source!=null){

String[] strs = source.split(“-“);

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

String lastName = strs[0];

String email = strs[1];

Integer gender = Integer.parseInt(strs[2]);

Integer deptId = Integer.parseInt(strs[3]);

Department dept = new Department();

dept.setId(deptId);

Employee employee = new Employee(null,lastName,email,gender,dept);

System.out.println(source+”–converter–“+employee);

return employee ;

}

}

return null;

}

}