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如何生成项目的json静态文件
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? ? ? ? ? ? ? ? ? ? ?如何生成項目的json靜態(tài)文件
項目的靜態(tài)文件，通常可用于緩存文件，避免數(shù)據(jù)的重復加載，提高運行速度。
文件命名規(guī)則：
?? ??? ??? ??? ?1級分類文件：class_1.js
?? ??? ??? ??? ?2級分類文件：以“class_2_”作為前綴+ 1級分類的id+ ".js"作為后綴
?? ??? ??? ??? ?商標文件： 以"tm_class_1_"作為 前綴+ 1級分類的id+ ".js"作為后綴
文件的json內(nèi)容：
?? ??? ??? ??? ?
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?? ??? ?實現(xiàn)過程：
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?? ??? ?①創(chuàng)建maven (jar）工程?
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?? ??? ?②加依賴?
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<dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version><scope>test</scope></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.37</version></dependency><!-- 2.MyBatis --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.2.8</version></dependency><dependency><groupId>com.google.code.gson</groupId><artifactId>gson</artifactId><version>2.2.4</version></dependency>
?? ??? ??
?? ??? ?③配置文件?? ??? ?
jdbcConfig.properties
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/gmall?useUnicode=true&characterEncoding=UTF8
username=root
password=123456
mybatis-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN""http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<properties resource="jdbcConfig.properties" /><environments default="development"><environment id="development"><transactionManager type="JDBC"/><dataSource type="POOLED"><property name="driver" value="${driver}"></property><property name="url" value="${url}"></property><property name="username" value="${username}"></property><property name="password" value="${password}"></property></dataSource></environment>
</environments><mappers><package name="com.nwj.mapper" /> </mappers>
</configuration>
?? ??? ?④創(chuàng)建bean/mapper接口??
T_MALL_CLASS_1.java
package com.nwj.bean;public class T_MALL_CLASS_1 {private int id;private String flmch1;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getFlmch1() {return flmch1;}public void setFlmch1(String flmch1) {this.flmch1 = flmch1;}}
T_MALL_CLASS_1_mapper.java
package com.nwj.mapper;import java.util.List;import com.nwj.bean.T_MALL_CLASS_1;public interface T_MALL_CLASS_1_mapper {List<T_MALL_CLASS_1> getlist();}
T_MALL_CLASS_1_mapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="com.nwj.mapper.T_MALL_CLASS_1_mapper"><select id ="getlist" resultType="com.nwj.bean.T_MALL_CLASS_1">select * from t_mall_class_1</select></mapper>
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補充： bean
? ? ? ? ? ? pojo
? ? ? ? ? ? entity
? ? ? ? ? 三點：所有屬性使用private修飾，提供setter/getter方法，有一個無參構(gòu)造器
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?? ??? ?⑤單元測試
TestClass_1.java
package com.nwj.js;import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.List;import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;import com.google.gson.Gson;
import com.nwj.bean.T_MALL_CLASS_1;
import com.nwj.mapper.T_MALL_CLASS_1_mapper;import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.List;import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;import com.google.gson.Gson;
import com.nwj.bean.T_MALL_CLASS_1;
import com.nwj.mapper.T_MALL_CLASS_1_mapper;public class TestClass_1 {@Testpublic void test() throws Exception {//獲取sqlSessionFactoryString resource = "mybatis-config.xml";InputStream inputStream = Resources.getResourceAsStream(resource);SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);//獲取sessionSqlSession session = sqlSessionFactory.openSession();//獲取mapperT_MALL_CLASS_1_mapper class_1_mapper = session.getMapper(T_MALL_CLASS_1_mapper.class);//操作獲取數(shù)據(jù)List<T_MALL_CLASS_1> class1list = class_1_mapper.getlist();System.out.println(class1list.size());//創(chuàng)建gson對象Gson gson = new Gson();//轉(zhuǎn)jsonString class1str = gson.toJson(class1list);//生成靜態(tài)文件FileOutputStream out = new FileOutputStream("e:/class_1.js");out.write(class1str.getBytes());out.close();}}
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