关于json格式字符串解析并用mybatis存入数据库

园子里面找了很多关于json解析后存入数据库的方法，不是太乱，就是没有写完，我下面的主题代码多是受下面两位的启发，请按顺序查看

 http://www.cnblogs.com/tian830937/p/6364622.html,我沿用了这个例子中的json数据格式，多层嵌套。

http://blog.csdn.net/baicp3/article/details/46711067，这个例子虽然是反例，但是引出了JsonArray。方便后续开发。

看完明白上面两个例子后，我们就可以开始了。（注意：没有看懂上面的例子请先看懂，当然，下面的代码复制过去都能用的，最主要是理解）

1.包，请到http://maven.aliyun.com获取，然后复制到pom.xml中

 

2.配置mybatis.xml，文件放在resource文件夹下，关于数据库的连接就不多讲，照代码中做就是

<?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:context="http://www.springframework.org/schema/context" xmlns:jdbc="http://www.springframework.org/schema/jdbc"  xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"xmlns:aop="http://www.springframework.org/schema/aop" xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:util="http://www.springframework.org/schema/util"xmlns:jpa="http://www.springframework.org/schema/data/jpa"xsi:schemaLocation="
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsdhttp://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsdhttp://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsdhttp://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsdhttp://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsdhttp://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd"><!-- 配置连接mysql --><!-- 已测试 --><bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"><property name="driverClassName" value="com.mysql.jdbc.Driver"/><property name="url" value="jdbc:mysql://localhost:3306/（数据库名）?useUnicode=true&amp;characterEncoding=utf8"/><!-- localhost:3307 -->                                                        <property name="username" value="root"/><property name="password" value="123456"/></bean>    <!-- 配置MyBatis mapper接口扫描 --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource"/><property name="mapperLocations" value="classpath:（mapper文件夹名）/*.xml"/></bean><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><!--  <property name="sqlSessionFactory" ref="sqlSessionFactory"/>  --><property name="basePackage" value="（项目dao层的位置，如：xxx.xxx.dao）"/>
</bean>
</beans>

3.设计实体类(实体类是按照要解析的json数据确定的)

student实体类

package com.bean;import java.util.Map;public class Student {private int age;//年龄private String gender;//性别，male/femaleprivate String grades;//班级private String name;//姓名private Map<String, Double> score;//各科分数private String scoreId;private Double weight;//体重public Student() {	// TODO Auto-generated constructor stub}public Student(int age, String gender, String grades, String name, String scoreId, Double weight) {super();this.age = age;this.gender = gender;this.grades = grades;this.name = name;this.weight = weight;this.scoreId=scoreId;}public String getScoreId() {return scoreId;}public void setScoreId(String scoreId) {this.scoreId = scoreId;}public Double getWeight() {return weight;}public void setWeight(Double weight) {this.weight = weight;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getGender() {return gender;}public void setGender(String gender) {this.gender = gender;}public String getGrades() {return grades;}public void setGrades(String grades) {this.grades = grades;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Map<String, Double> getScore() {return score;}public void setScore(Map<String, Double> score) {this.score = score;}@Overridepublic String toString() {return "Student [age=" + age + ", gender=" + gender + ", grades=" + grades + ", name=" + name + ", score="+ score + ", weight=" + weight + "]";}}

Score实体类

package com.bean;public class Score {private String scoreId;private Double Networkprotocol;//网络协议private Double javaEE;private Double Computerbasis;//计算机基础private Double Linuxoperatingsystem;//Linux操作系统private Double networksecurity;//网络安全private Double SQLdatabase;//Sql数据库private Double datastructure;//数据结构public Score() {// TODO Auto-generated constructor stub
    }public Score(String scoreId, Double networkprotocol, Double javaEE, Double computerbasis,Double linuxoperatingsystem, Double networksecurity, Double sQLdatabase, Double datastructure) {super();this.scoreId = scoreId;Networkprotocol = networkprotocol;this.javaEE = javaEE;Computerbasis = computerbasis;Linuxoperatingsystem = linuxoperatingsystem;this.networksecurity = networksecurity;SQLdatabase = sQLdatabase;this.datastructure = datastructure;}public String getScoreId() {return scoreId;}public void setScoreId(String scoreId) {this.scoreId = scoreId;}public Double getNetworkprotocol() {return Networkprotocol;}public void setNetworkprotocol(Double networkprotocol) {Networkprotocol = networkprotocol;}public Double getJavaEE() {return javaEE;}public void setJavaEE(Double javaEE) {this.javaEE = javaEE;}public Double getComputerbasis() {return Computerbasis;}public void setComputerbasis(Double computerbasis) {Computerbasis = computerbasis;}public Double getLinuxoperatingsystem() {return Linuxoperatingsystem;}public void setLinuxoperatingsystem(Double linuxoperatingsystem) {Linuxoperatingsystem = linuxoperatingsystem;}public Double getNetworksecurity() {return networksecurity;}public void setNetworksecurity(Double networksecurity) {this.networksecurity = networksecurity;}public Double getSQLdatabase() {return SQLdatabase;}public void setSQLdatabase(Double sQLdatabase) {SQLdatabase = sQLdatabase;}public Double getDatastructure() {return datastructure;}public void setDatastructure(Double datastructure) {this.datastructure = datastructure;}@Overridepublic String toString() {return "Score [scoreId=" + scoreId + ", Networkprotocol=" + Networkprotocol + ", javaEE=" + javaEE+ ", Computerbasis=" + Computerbasis + ", Linuxoperatingsystem=" + Linuxoperatingsystem+ ", networksecurity=" + networksecurity + ", SQLdatabase=" + SQLdatabase + ", datastructure="+ datastructure + "]";}}

4.配置dao，建立dao接口

package company.order.dao;import com.bean.Score;
import com.bean.Student;public interface TestDao {int addStudent(Student student);int addScore(Score score);
}

5.设计数据库表结构

student表结构

 

score表结构

 

6.配置mapper.xml，注意修改路径

<?xml version="1.0" encoding="UTF-8" ?>  
<!DOCTYPE mapper PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN"      "http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd"><mapper namespace="company.order.dao.TestDao"><!--测试将json解析的数据存入到数据库 --><insert id="addStudent"  parameterType="com.bean.Student">insert into student(age,gender,grades,name,scoreId,weight                    )values(#{age},#{gender},#{grades},#{name},#{scoreId},#{weight}    )</insert><insert id="addScore"  parameterType="com.bean.Score">insert into score(scoreId,Networkprotocol,javaEE,Computerbasis,Linuxoperatingsystem,networksecurity,SQLdatabase,datastructure            )values(#{scoreId},#{Networkprotocol},#{javaEE},#{Computerbasis},#{Linuxoperatingsystem},#{networksecurity},#{SQLdatabase},#{datastructure}    )</insert>
</mapper>

7.上面的准备工作就做好了，然后就是核心业务（模拟的是service业务层）

（1）.将json格式字符串解析成想要的数据格式

（2）.将数据封装jsonarray

（3）.遍历jsonArray,将object数据封装为JSONObject

（4）.运用JSONObject.toBean方法，将其封装为实体类对象

（5）.写入数据库

import java.util.UUID;import org.junit.Before;
import org.junit.Test;
import org.springframework.context.support.ClassPathXmlApplicationContext;import company.order.dao.TestDao;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;public class Domain {ClassPathXmlApplicationContext ctx;@Beforepublic void init(){ctx=new ClassPathXmlApplicationContext("backstage-mybatis.xml");}/***这个测试的代码相当于service业务层的代码 */@Testpublic void testJson(){TestDao dao=ctx. getBean("testDao", TestDao.class);String jsonstr = "{\"name\":\"三班\",\"students\":[{\"age\":25,\"gender\":\"female\",\"grades\":\"三班\",\"name\":\"露西\",\"score\":{\"网络协议\":98,\"JavaEE\":92,\"计算机基础\":93},\"weight\":51.3},{\"age\":26,\"gender\":\"male\",\"grades\":\"三班\",\"name\":\"杰克\",\"score\":{\"网络安全\":75,\"Linux操作系统\":81,\"计算机基础\":92},\"weight\":66.5},{\"age\":25,\"gender\":\"female\",\"grades\":\"三班\",\"name\":\"莉莉\",\"score\":{\"网络安全\":95,\"Linux操作系统\":98,\"SQL数据库\":88,\"数据结构\":89},\"weight\":55}]}";int strstrat=jsonstr.indexOf("[");int endstrat=jsonstr.lastIndexOf("]")+1;//将数据分成jsonArrayString jsonStr=jsonstr.substring(strstrat, endstrat);//System.out.println(jsonStr);JSONArray jsonArray=new JSONArray();jsonArray =JSONArray.fromObject(jsonStr);for (Object object : jsonArray) {JSONObject jsonObject=JSONObject.fromObject(object);Student studentData=(Student) JSONObject.toBean(jsonObject, Student.class);            //System.out.println(studentData);String ScoreId= UUID.randomUUID().toString();//System.out.println(ScoreId);studentData.setScoreId(ScoreId);//设计ScoreId方便以后关联查询            Student student=new Student(studentData.getAge(), studentData.getGender(), studentData.getGrades(), studentData.getName(), studentData.getScoreId(), studentData.getWeight());//System.out.println(student);int a=dao.addStudent(student);//将学生信息写入到数据库Map<String,Double> Scores= studentData.getScore();//遍历Scores,将单个数据存入到数据库/*map遍历总结* http://www.cnblogs.com/blest-future/p/4628871.html* */Score scoreData=new Score();for (Map.Entry<String , Double> entry : Scores.entrySet()) {//Map.entry<Integer,String> 映射项（键-值对）  有几个方法：用上面的名字entry//entry.getKey() ;entry.getValue(); entry.setValue();//map.entrySet()  返回此映射中包含的映射关系的 Set视图。//System.out.println("key= " + entry.getKey() + " and value= "+ entry.getValue());if(entry.getKey().equals("网络协议")){                                scoreData.setNetworkprotocol(Double.parseDouble(entry.getValue()+""));} if(entry.getKey().equals("JavaEE")){scoreData.setJavaEE(Double.parseDouble(entry.getValue()+""));} if(entry.getKey().equals("计算机基础")){scoreData.setComputerbasis(Double.parseDouble(entry.getValue()+""));} if(entry.getKey().equals("网络安全")){scoreData.setNetworksecurity(Double.parseDouble(entry.getValue()+""));} if(entry.getKey().equals("Linux操作系统")){scoreData.setLinuxoperatingsystem(Double.parseDouble(entry.getValue()+""));} if(entry.getKey().equals("SQL数据库")){scoreData.setSQLdatabase(Double.parseDouble(entry.getValue()+""));} if(entry.getKey().equals("数据结构")){scoreData.setDatastructure(Double.parseDouble(entry.getValue()+""));}}Score score=new Score(ScoreId, scoreData.getNetworkprotocol(), scoreData.getJavaEE(), scoreData.getComputerbasis(), scoreData.getLinuxoperatingsystem(), scoreData.getNetworksecurity(), scoreData.getSQLdatabase(), scoreData.getDatastructure());int b=dao.addScore(score);System.out.println("学生："+a+";成绩:"+b);}//JSONObject jsonObject = JSONObject.fromObject(jsonStr);//Grades grades = (Grades) JSONObject.toBean(jsonObject, Grades.class);//System.out.println(grades);//System.out.println(grades.getName());//System.out.println(grades.getStudents());
        }
}

 8.结果：