基于属性注入，修改为构造注入，新建constructor包以及bean-di-constructor.xml配置文件，修改配置文件内容为构造注入，新增Budget实体类的无参及全参构造

ffms-SpringProject/src/bean-di-constructor.xml

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+<?xml version="1.0" encoding="UTF-8" ?>
+<beans
+        xmlns="http://www.springframework.org/schema/beans"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
+
+    <!-- 预算管理模块Budget实体Bean配置 -->
+    <bean id="budget" class="com.ssm.di.constructor.Budget">
+        <constructor-arg name="budgetId" value="0001"/>
+        <constructor-arg name="category" value="餐饮预算"/>
+        <constructor-arg name="amount" value="5000.00"/>
+        <constructor-arg name="period" value="月度"/>
+        <constructor-arg name="startDate" value="2025-04-13"/>
+        <constructor-arg name="remark" value="无"/>
+    </bean>
+
+</beans>

ffms-SpringProject/src/com/ssm/di/constructor/Budget.java

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+package com.ssm.di.constructor;
+
+import java.math.BigDecimal;
+
+
+public class Budget {
+    //预算编号
+    private Integer budgetId;
+    //预算分类
+    private String category;
+    //预算金额
+    private BigDecimal amount;
+    //预算周期
+    private String period;
+    //预算生效日期
+    private String startDate;
+    //预算备注
+    private String remark;
+
+    public Budget(){}
+
+    public Budget(Integer budgetId, String category, BigDecimal amount, String period, String startDate, String remark) {
+        this.budgetId = budgetId;
+        this.category = category;
+        this.amount = amount;
+        this.period = period;
+        this.startDate = startDate;
+        this.remark = remark;
+    }
+
+    public Integer getBudgetId() {
+        return budgetId;
+    }
+
+    public void setBudgetId(Integer budgetId) {
+        this.budgetId = budgetId;
+    }
+
+    public String getCategory() {
+        return category;
+    }
+
+    public void setCategory(String category) {
+        this.category = category;
+    }
+
+    public BigDecimal getAmount() {
+        return amount;
+    }
+
+    public void setAmount(BigDecimal amount) {
+        this.amount = amount;
+    }
+
+    public String getPeriod() {
+        return period;
+    }
+
+    public void setPeriod(String period) {
+        this.period = period;
+    }
+
+    public String getStartDate() {
+        return startDate;
+    }
+
+    public void setStartDate(String startDate) {
+        this.startDate = startDate;
+    }
+
+    public String getRemark() {
+        return remark;
+    }
+
+    public void setRemark(String remark) {
+        this.remark = remark;
+    }
+    //自定义方法
+    public String toString(){
+        return "预算编号：" + budgetId + "\n"
+                + "预算分类：" + category +"\n"
+                + "预算金额：" + amount + "\n"
+                + "预算周期：" + period + "\n"
+                + "生效日期：" + startDate + "\n"
+                + "备注：" + remark;
+    }
+}

ffms-SpringProject/src/com/ssm/di/constructor/TestDI.java

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+package com.ssm.di.constructor;
+
+
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.support.ClassPathXmlApplicationContext;
+
+public class TestDI {
+public static void main(String[] args) {
+    //1.初始化Spring容器，加载配置文件
+    ApplicationContext applicationContext = new ClassPathXmlApplicationContext("bean-di-constructor.xml");
+
+    //获得Budget对象
+    Budget budget = (Budget) applicationContext.getBean("budget");
+    //输出Budget实例的信息
+    System.out.println(budget.toString());
+
+}
+}

ffms-SpringProject/src/com/ssm/di/constructor/TestNew.java

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+package com.ssm.di.constructor;
+
+import java.math.BigDecimal;
+
+public class TestNew {
+public static void main(String[] args) {
+    //通过new的方式实例化Budget对象
+    Budget budget = new Budget();
+    budget.setBudgetId(0001);
+    budget.setCategory("餐饮预算");
+    budget.setAmount(new BigDecimal("5000.00"));
+    budget.setPeriod("月度");
+    budget.setStartDate("2025-04-13");
+    budget.setRemark("无");
+    System.out.println(budget);
+
+
+}
+}
+