前言：
此时小伙伴们对“数据库映射表怎么做”可能比较重视，大家都想要知道一些“数据库映射表怎么做”的相关资讯。那么小编同时在网摘上收集了一些有关“数据库映射表怎么做””的相关知识，希望朋友们能喜欢，姐妹们快快来学习一下吧！（1），模板mapper_.ftl文件
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" ";><mapper namespace="com.dto.<#list mapDataTableComment as listItmCom > ${listItmCom.upperColumnName} </#list>Dao"> <!--用户实体结果映射--> <resultMap id="ResultMap" type="com.dto.<#list mapDataTableComment as listItmCom > ${listItmCom.upperColumnName} </#list>Dto"> <result column="tid" jdbcType="VARCHAR" property="tid" /> <#list mapDataList as listItm > <result column="${listItm.columnName}" jdbcType="VARCHAR" property="${listItm.columnName}" /> </#list> </resultMap> <!--表字段列表 --> <sql id="Base_Column_List"> <#list mapDataList as listItm > ${listItm.columnName} , </#list> </sql> <insert id="<#list mapDataTableComment as listItmCom > ${listItmCom.columnName} </#list>AddSave" parameterType="com.dto.<#list mapDataTableComment as listItmCom > ${listItmCom.upperColumnName} </#list>Dto"> insert into <#list mapDataTableComment as listItmCom > ${listItmCom.columnName} </#list> values ( <#list mapDataList as listItm > 井号左大括${listItm.columnName}右大括 , </#list> ) </insert> <update id="<#list mapDataTableComment as listItmCom > ${listItmCom.columnName} </#list>ModifySave" parameterType="com.dto.<#list mapDataTableComment as listItmCom > ${listItmCom.upperColumnName} </#list>Dto"> update <#list mapDataTableComment as listItmCom > ${listItmCom.columnName} </#list> T <set> <#list mapDataList as listItm > <if test="${listItm.columnName} != null and ${listItm.columnName} != '' "> ${listItm.columnName} = 井号左大括${listItm.columnName}, jdbcType=VARCHAR右大括, </if> </#list> </set> where 1 = 1 and tid = 井号左大括tid右大括 </update> <delete id="<#list mapDataTableComment as listItmCom > ${listItmCom.columnName} </#list>Del" parameterType="com.dto.<#list mapDataTableComment as listItmCom > ${listItmCom.upperColumnName} </#list>Dto"> delete from <#list mapDataTableComment as listItmCom > ${listItmCom.columnName} </#list> where 1 = 1 and tid = 井号左大括tid右大括 </delete> <select id="get<#list mapDataTableComment as listItmCom > ${listItmCom.upperColumnName} </#list>" resultMap="ResultMap" parameterType="com.dto.<#list mapDataTableComment as listItmCom > ${listItmCom.upperColumnName} </#list>Dto"> select <include refid="Base_Column_List" /> from <#list mapDataTableComment as listItmCom > ${listItmCom.columnName} </#list> T where 1 = 1 <if test="tid != null and tid != '' "> AND tid = 井号左大括tid, jdbcType=VARCHAR右大括 </if> </select> <select id="query<#list mapDataTableComment as listItmCom > ${listItmCom.upperColumnName} </#list>List" resultMap="ResultMap" parameterType="com.dto.<#list mapDataTableComment as listItmCom > ${listItmCom.upperColumnName} </#list>Dto"> select <include refid="Base_Column_List" /> from <#list mapDataTableComment as listItmCom > ${listItmCom.columnName} </#list> T where 1 = 1 <if test="tid != null and tid != '' "> AND tid = 井号左大括tid, jdbcType=VARCHAR右大括 </if> <#list mapDataList as listItm > <if test="${listItm.columnName} != null and ${listItm.columnName} != '' "> AND ${listItm.columnName} like concat('%',井号左大括${listItm.columnName},jdbcType=VARCHAR右大括,'%') </if> </#list> </select> <select id="getMaxid" resultType="java.lang.Integer"> select max(tid) maxTid from t00_user </select></mapper>（2），生成映射xml文件
public class TestCls { public static void main(String[] args) throws Exception { TestCls testCls = new TestCls(); String testT00_po = "testT00_user"; String generFileName = testT00_po + "Mapper.xml"; testCls.outTemplate(testT00_po, "用户数据" , generFileName, "mapper_.ftl" ); System.out.println("执行成功！"); } // 输出到模板 private void outTemplate(String entryInfoPoName, String tableComment , String templateFileName , String templFileName ) throws Exception { Configuration configuration = new Configuration(); String templateDir = "F:\\xbl\\myResource\\temp_test_"; configuration.setDirectoryForTemplateLoading(new File(templateDir)); Template template = configuration.getTemplate(templFileName); Map<String, List<EntryInfoPo>> dataMap = new HashMap<String, List<EntryInfoPo>>(); List<EntryInfoPo> listEntryInfo = new ArrayList<EntryInfoPo>(); listEntryInfo = testMetaAddComment(); dataMap.put("mapDataList", listEntryInfo ); // 表注释 dataMap.put("mapDataTableComment", testTableComment(entryInfoPoName, tableComment )); String generFileDir = "F:\\xbl\\myResource\\temp_test_\\gener_file_\\"; File generFile = new File(generFileDir + templateFileName); if(generFile.exists()) { generFile.delete(); } generFile.createNewFile(); Writer outputWriter = new OutputStreamWriter(new FileOutputStream(generFile ) );// Writer outputWriter = new OutputStreamWriter(System.out ); template.process(dataMap, outputWriter); System.out.println("输出完成！"); outputWriter.close(); } // 表注释 private List<EntryInfoPo> testTableComment(String entryInfoPoName, String tableComment) throws Exception { List<EntryInfoPo> listTableComment = new ArrayList<EntryInfoPo>(); EntryInfoPo entryInfoPo = new EntryInfoPo(); entryInfoPo.setColumnName(entryInfoPoName); entryInfoPo.setColumnComment(tableComment); entryInfoPo.setUpperColumnName(firTextUpper( entryInfoPoName ) ); listTableComment.add(entryInfoPo); return listTableComment; } // 首字母大写 private String firTextUpper(String scontext ) { int textLength = scontext.length(); String sufText = scontext.substring(1, textLength); String firText = scontext.substring(0, 1); firText = firText.toUpperCase(); String finText = firText + sufText; return finText; } private List<EntryInfoPo> testMetaAddComment() throws Exception { List<EntryInfoPo> listEntryInfoPo = new ArrayList<EntryInfoPo>(); Connection connection = getDataBaseConnection(); Statement statement = connection.createStatement(); ResultSet resultSet = statement.executeQuery("show full columns from t00_user "); while (resultSet.next()) { String columnComment = resultSet.getString("Comment"); String columnName = resultSet.getString("Field"); columnName = columnName.toLowerCase(); EntryInfoPo entryInfoPo = new EntryInfoPo(); entryInfoPo.setColumnName(columnName); entryInfoPo.setColumnComment(columnComment); listEntryInfoPo.add(entryInfoPo); } return listEntryInfoPo; } private Connection getDataBaseConnection() throws Exception { // 连接数据库 Class.forName("com.mysql.jdbc.Driver"); String databaseUrl = "jdbc:mysql://127.0.0.1:3306/grcdb05?useUnicode=true&characterEncoding=utf8"; Connection connection = DriverManager.getConnection(databaseUrl, "root", "root"); return connection; }}（3），注意替换生成的配置文件中的空格及临时替代符号
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标签： #数据库映射表怎么做
