SpringMVC自定义类型转换器

最新推荐文章于 2022-07-18 17:21:08 发布

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本文介绍如何在SpringMVC中实现自定义类型转换器，并通过实例演示了将字符串转换为Student对象的过程。

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具体步骤：

1. 自定义类型转换器实现Converter<S,T>接口并加入到SpringMVC的IOC容器中。

自定义的类如下：

Student.java

package com.gpf.bean;

public class Student {
	
	private int id;
	private String name;
	public Student() {
		super();
		// TODO Auto-generated constructor stub
	}
	public Student(int id, String name) {
		super();
		this.id = id;
		this.name = name;
	}
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	@Override
	public String toString() {
		return "Student [id=" + id + ", name=" + name + "]";
	}
	
	
}

类型转换器代码如下：

MyConverter.java

package com.gpf.converter;

import org.springframework.core.convert.converter.Converter;
import org.springframework.stereotype.Component;

import com.gpf.bean.Student;

@Component
public class MyConverter implements Converter<String, Student> {

	@Override
	public Student convert(String source) {
		if(source != null && source != ""){
			String[] split = source.split("-");
			int id = Integer.parseInt(split[1]);
			String name = split[0];
			Student student = new Student(id, name);
			return student;
		}
		return null;
	}

}

2.配置自定义转换器到FormattingConversionServiceFactoryBean工厂中！

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

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

bean的值为自定义转换器的首字母小写。

3.调用。

测试jsp：

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
	<form action="${pageContext.request.contextPath }/getStu" method="post">
		姓名：<input type="text" name="stu"><br/>
		<input type="submit" value="提交">
	</form>
</body>
</html>

Controller：

package com.gpf.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;

import com.gpf.bean.Employee;
import com.gpf.bean.Student;

@Controller
public class EmployeeController {

	//自定义
	@RequestMapping(value="/getStu", method = RequestMethod.POST)
	public String getStudent(@RequestParam(value="stu") Student stu){
		System.out.println(stu);
		return "success";
	}
}