Spring 调试历险记
前言：
今天最大的收获就是对代码的报错，不再那么的恐惧了，自己更具有信心一步一步去分析。就事论事，面对当下：有问题，就问题论事、分析，解决问题----这就是通俗的说：代码亲和力的进步的吧！
最近敲了一个spring的demo，对于时间的转换，一直都是没有出来。自己很是苦恼，最后是请了sister Angelina 来帮个忙，人家有经验，有代码量，就是不一样呀！
在InjectionTest.java中进行单元测试时，一直就是报错，自己没有找出来，总的来说还是对报错有一定的恐惧，现在的耐心还不是特别的足，还需要沉淀，这段时间也是非常的感觉sister Angelina,常常叫她来帮我调试代码的错误，总是责无旁贷，让我很是感激，thanks for her!
问题原型：
单元测试爆红，测试又是没有通过：
报错情况：
org.springframework.beans.factory.BeanCreationException:Error creating bean with name 'customEditors' defined in class path resource[applicationContext-editor.xml]: Cannot create inner bean'com.bjpowernode.spring.UtilDatePeropertyEditor#5c0369c4' while setting beanproperty 'customEditors' with key [java.util.Date]; nested exception isorg.springframework.beans.factory.BeanCreationException: Error creating beanwith name 'com.bjpowernode.spring.UtilDatePeropertyEditor#5c0369c4' defined inclass path resource [applicationContext-editor.xml]: Error setting propertyvalues; nested exception is org.springframework.beans.NotWritablePropertyException:Invalid property 'pattern' of bean class[com.bjpowernode.spring.UtilDatePeropertyEditor]: Bean property 'pattern' isnot writable or has an invalid setter method. Does the parameter type of thesetter match the return type of the getter?
Causedby: org.springframework.beans.factory.BeanCreationException: Error creatingbean with name 'com.bjpowernode.spring.UtilDatePeropertyEditor#5c0369c4'defined in class path resource [applicationContext-editor.xml]: Error settingproperty values; nested exception isorg.springframework.beans.NotWritablePropertyException: Invalid property'pattern' of bean class [com.bjpowernode.spring.UtilDatePeropertyEditor]: Beanproperty 'pattern' is not writable or has an invalid setter method. Does the parametertype of the setter match the return type of the getter?
Causedby: org.springframework.beans.NotWritablePropertyException: Invalid property'pattern' of bean class [com.bjpowernode.spring.UtilDatePeropertyEditor]: Beanproperty 'pattern' is not writable or has an invalid setter method. Does theparameter type of the setter match the return type of the getter?
atorg.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:751)
atorg.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:608)
atorg.springframework.beans.AbstractPropertyAccessor.setPropertyValue(AbstractPropertyAccessor.java:49)
atorg.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAcce
看到这样的情况，自己是非常的恐惧的，总是感觉自己不会，没有信心去面对，但是只要耐心的去看，其实也不是那么的恐惧。之前看了也调试了不少错误，这次真的弄了好长时间，还没有弄出来，就请sister Angelina 来帮我，站在巨人她的肩膀上。她带着我一句一句，一步一步的分享，这次最重要的就是叫我怎么分享，怎么一句一句的去理清逻辑，去分享，找错再去纠错误等等。
解决问题：
其实细心的看看上面，先宏观的看，就是两个Caused by ,所以很有可能就是两个错误，在细细的去看和分析就行呀：
一个是Errorcreating bean with name 'customEditors' defined in class path resource[applicationContext-editor.xml]: Cannot create inner bean'com.bjpowernode.spring.UtilDatePeropertyEditor#5c0369c4' while setting beanproperty 'customEditors' with key [java.util.Date];
另一个就是：org.springframework.beans.NotWritablePropertyException:Invalid property 'pattern' of bean class[com.bjpowernode.spring.UtilDatePeropertyEditor]: Bean property 'pattern' isnot writable or has an invalid setter method. Does the parameter type of thesetter match the return type of the getter?
就事论事，这么一看，其实就是非常的有意思了，将问题查分开来，柳暗花明又一村！
下面是代码实践例子：
实体：Bean1.java
package com.bjpowernode.spring;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.Set;
public class Bean1 {
privateString strValue;
privateint intValue;
privateList listValue;
privateSet setValue;
private String[] arrayValue;
private Map mapValue;
private Date dateValue;
publicDate getDateValue() {
returndateValue;
}
publicvoid setDateValue(Date dateValue) {
this.dateValue= dateValue;
}
publicString getStrValue() {
returnstrValue;
}
publicvoid setStrValue(String strValue) {
this.strValue= strValue;
}
publicint getIntValue() {
returnintValue;
}
publicvoid setIntValue(int intValue) {
this.intValue= intValue;
}
publicList getListValue() {
returnlistValue;
}
publicvoid setListValue(List listValue) {
this.listValue= listValue;
}
publicSet getSetValue() {
returnsetValue;
}
publicvoid setSetValue(Set setValue) {
this.setValue= setValue;
}
publicString[] getArrayValue() {
returnarrayValue;
}
publicvoid setArrayValue(String[] arrayValue) {
this.arrayValue= arrayValue;
}
publicMap getMapValue() {
returnmapValue;
}
publicvoid setMapValue(Map mapValue) {
this.mapValue= mapValue;
}
}
UtilDatePropertyEditor.java
package com.bjpowernode.spring;
import java.beans.PropertyEditorSupport;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* 属性编辑器：在application.xml中配置的是字符串，
* 这个UtilDatePerorpertyEditor就是将字符串转换javaUtilDate
*@author Daniel
*
*/
public class UtilDatePropertyEditor extendsPropertyEditorSupport {
@Override
publicvoid setAsText(String text) throws IllegalArgumentException {
System.out.println("----UtilDatePropertyEditor.setAsText()-----"+ text );
try{
Datedate=new SimpleDateFormat("yyyy-MM-dd").parse(text);
this.setValue(date);
}catch (ParseException e) {
//TODO Auto-generated catch block
e.printStackTrace();
thrownew IllegalArgumentException(text);
}
}
}
配置文件：
本来是一个配置文件的，但是有时一个配置文件东西还是比较多的，所以可以将配置文件也分成两个，让分析和编码起来更加的高效。
applicationContext.xml 和applicationContext-editor.xml
<?xml version="1.0"encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-2.0.xsd
http://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-2.0.xsd">
<bean id="bean1"class="com.bjpowernode.spring.Bean1">
<property name="strValue" value="Hello_Spring"/>
<!--两种方式注入数字：方法1<propertyname="intValue" value="123"/> -->
<!-- 方法2 -->
<property name="intValue">
<value>123</value>
</property>
<property name="listValue">
<list>
<value >list1</value>
<value >list2</value>
</list>
</property>
<property name="setValue">
<set>
<value>set1</value>
<value>set2</value>
</set>
</property>
<property name="arrayValue">
<list>
<value>array1</value>
<value>array2</value>
</list>
</property>
<property name="mapValue">
<map>
<entry key="k1"value="v1"></entry>
<entry key="k2"value="v2"></entry>
</map>
</property>
<property name="dateValue" value="2017-2-27"/>
</bean>
</beans>
applicationContext-editor.xml
<?xml version="1.0"encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
http://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-2.0.xsd">
<bean id="customEditors"class="org.springframework.beans.factory.config.CustomEditorConfigurer">
<property name="customEditors">
<map>
<entry key="java.util.Date">
<bean class="com.bjpowernode.spring.UtilDatePeropertyEditor">
<!-- <property name="pattern" value="yyyy年MM月dd日"/> -->
</bean>
</entry>
</map>
</property>
</bean>
<!--
<bean id="utilDatePropertyEditor"class="com.bjpowernode.spring.UtilDatePropertyEditor">
</bean> -->
</beans>
InjectionTest.java
package test;
importorg.springframework.beans.factory.BeanFactory;
importorg.springframework.context.support.ClassPathXmlApplicationContext;
import com.bjpowernode.spring.Bean1;
import junit.framework.TestCase;
public class InjectionTest extends TestCase{
privateBeanFactory factory;
@Override
protectedvoid setUp() throws Exception {
//TODO Auto-generated method stub
String[] configLocation=new String[]{"applicationContext.xml","applicationContext-editor.xml"};
// factory=newClassPathXmlApplicationContext("applicationContext.xml");
factory=newClassPathXmlApplicationContext(configLocation);
}
/*protectedvoid tearDown() throws Exception {
//TODO Auto-generated method stub
}*/
publicvoid testInjection1()
{
//简单的new 一下，属性是不会注入的，必须从容器中拿出来
//Bean bean=new Bean();普通的new 不会被注入
Bean1bean1=(Bean1)factory.getBean("bean1");
System.out.println("bean.strValue=" + bean1.getStrValue());
System.out.println("bean.intValue=" + bean1.getIntValue());
System.out.println("bean.listValue=" + bean1.getListValue());
System.out.println("bean.setValue=" + bean1.getSetValue());
System.out.println("bean.arrayValue=" + bean1.getArrayValue());
System.out.println("bean.mapValue=" + bean1.getMapValue());
System.out.println("bean.dateValue=" + bean1.getDateValue());
}
}
小结：
今天最大的收获就是对代码的报错，不再那么的恐惧了，自己更具有信心一步一步去分析。就事论事，面对当下：有问题，就问题论事、分析，解决问题----这就是通俗的说：代码亲和力的进步的吧！
感激sister 何红霞今天晚上来引导我如何一步一步，耐心的调错，非常的开心，非常的好，以后我更要学会自己多找错和调错，接下来进行总结和继续往后面走。