1.简介
在SSH框架下，假设我们将配置文件放在项目的src/datasource.properties路径下，Spring的配置文件也是src/applicationContext.xml路径下，那么我们可以借助Spring的property-placeholder读取配置文件，然后注入Bean中。我们在程序中，可以根据Bean的Id，获取注入的值。这样我们就可以借助Spring来读取配置文件。
2.Code
2.1Student.java
- package edu.njupt.zhb.model.mysql;
- /**
- * Student entity. @author MyEclipse Persistence Tools
- */
- public class Student implements java.io.Serializable {
- // Fields
- private String id;
- private String name;
- private String course;
- private Integer score;
- private String remarks;
- // Constructors
- /** default constructor */
- public Student() {
- }
- /** minimal constructor */
- public Student(String name, String course, Integer score) {
- this.name = name;
- this.course = course;
- this.score = score;
- }
- /** full constructor */
- public Student(String name, String course, Integer score, String remarks) {
- this.name = name;
- this.course = course;
- this.score = score;
- this.remarks = remarks;
- }
- // Property accessors
- public String getId() {
- return this.id;
- }
- public void setId(String id) {
- this.id = id;
- }
- public String getName() {
- return this.name;
- }
- public void setName(String name) {
- this.name = name;
- }
- public String getCourse() {
- return this.course;
- }
- public void setCourse(String course) {
- this.course = course;
- }
- public Integer getScore() {
- return this.score;
- }
- public void setScore(Integer score) {
- this.score = score;
- }
- public String getRemarks() {
- return this.remarks;
- }
- public void setRemarks(String remarks) {
- this.remarks = remarks;
- }
- }
2.2datasource.properties中的配置
- #student config
- student.name=Haibo
- student.id=1012010638
- student.course=Java
- student.score=90
- student.remarks=Come from Properties
2.3Spring配置文件applicationContext.xml部分配置
- <!-- 引入datasource配置文件 -->
- <context:property-placeholder location="classpath:datasource.properties" />
- <bean id="student" class="edu.njupt.zhb.model.mysql.Student">
- <property name="id" value="${student.id}" />
- <property name="name" value="${student.name}" />
- <property name="course" value="${student.course}" />
- <property name="score" value="${student.score}" />
- <property name="remarks" value="${student.remarks}" />
- </bean>
2.4读取Spring中的Bean函数
- /*
- * $filename: BeanUtils.java,v $
- * $Date: 2013-12-9 $
- * Copyright (C) ZhengHaibo, Inc. All rights reserved.
- * This software is Made by Zhenghaibo.
- */
- package edu.njupt.zhb.tools;
- import org.apache.struts2.ServletActionContext;
- import org.springframework.context.ApplicationContext;
- import org.springframework.context.support.FileSystemXmlApplicationContext;
- /*
- *@author: ZhengHaibo
- *web: http://blog.csdn.net/nuptboyzhb
- *mail: zhb931706659@126.com
- *2013-12-9 Nanjing,njupt,China
- */
- public class BeanUtils {
- /**
- * 获取Spring中注入的Bean
- * @param beanId：id
- * @return
- */
- public static Object getSpringBean(String beanId){
- //Spring配置文件的路径
- String xmlRealPath = ServletActionContext.getServletContext().getRealPath("/WEB-INF/classes/applicationContext.xml");
- ApplicationContext ac = new FileSystemXmlApplicationContext(xmlRealPath);
- return ac.getBean(beanId);
- }
- }
2.5我们可以通过如下方式，获得Spring注入的值
- Student stu = (Student)BeanUtils.getSpringBean("student");
2.6用JSONObject工具打印一下stu对象的值
- System.out.println(JSONObject.fromObject(stu).toString());
2.7运行结果为：
- {"course":"Java","id":"1012010638","name":"Haibo","remarks":"Come from Properties","score":90}
未经允许不得用于商业目的
