参考地址：
使用方式
第一步：安装idea:自行百度
第二步：Idea配置mysql 连接
- View -> Tool Windows -> DataSource 出现数据连接页面
- 点击 + 号，出现数据库连接设置，
- name: 连接名称
- comments: 备注
- host:本地或者内网ip
- user:用户名
- password：密码
- Database：连接数据库名称
- url: jdbc连接
- 注意此处如果是mysql 5.5 以上 的版本需要加入如下参数
- serverTimezone=UTC
第三步：使用groovy逆向生成model, dao, daoxml 三种类型的文件
- 右击连接：选中
Scripted Extendsions - 选择
Go to Scripts Directory调转到go 语言的模板地址 - 如果需要扩展则只需要在该文件夹内加入对应的模板即可
第四步：几个默认的模板
Generate MyPOJOs.groovy文件（生成实体类）：
import com.intellij.database.model.DasTable import com.intellij.database.model.ObjectKind import com.intellij.database.util.Case import com.intellij.database.util.DasUtil import java.io.* import java.text.SimpleDateFormat /* * Available context bindings: * SELECTION Iterable<DasObject> * PROJECT project * FILES files helper */ packageName = "" typeMapping = [ (~/(?i)tinyint|smallint|mediumint/) : "Integer", (~/(?i)int/) : "Long", (~/(?i)bool|bit/) : "Boolean", (~/(?i)float|double|decimal|real/) : "Double", (~/(?i)datetime|timestamp|date|time/) : "Date", (~/(?i)blob|binary|bfile|clob|raw|image/): "InputStream", (~/(?i)/) : "String" ] FILES.chooseDirectoryAndSave("Choose directory", "Choose where to store generated files") { dir -> SELECTION.filter { it instanceof DasTable && it.getKind() == ObjectKind.TABLE }.each { generate(it, dir) } } def generate(table, dir) { //def className = javaClassName(table.getName(), true) def className = javaName(table.getName(), true) def fields = calcFields(table) packageName = getPackageName(dir) PrintWriter printWriter = new PrintWriter(new OutputStreamWriter(new FileOutputStream(new File(dir, className + ".java")), "UTF-8")) printWriter.withPrintWriter {out -> generate(out, className, fields,table)} // new File(dir, className + ".java").withPrintWriter { out -> generate(out, className, fields,table) } } // 获取包所在文件夹路径 def getPackageName(dir) { return dir.toString().replaceAll("\\\\", ".").replaceAll("/", ".").replaceAll("^.*src(\\.main\\.java\\.)?", "") + ";" } def generate(out, className, fields,table) { def tableName = table.getName() out.println "package $packageName" out.println "" out.println "import javax.persistence.Column;" out.println "import javax.persistence.Entity;" out.println "import javax.persistence.Table;" out.println "import java.io.Serializable;" out.println "import lombok.Data;" out.println "import lombok.AllArgsConstructor;" out.println "import lombok.Builder;" out.println "import lombok.NoArgsConstructor;" Set types = new HashSet() fields.each() { types.add(it.type) } if (types.contains("Date")) { out.println "import java.util.Date;" } if (types.contains("InputStream")) { out.println "import java.io.InputStream;" } out.println "" out.println "/**\n" + " * @Description \n" + " * @Author GX\n" + " * @Date "+ new SimpleDateFormat("yyyy-MM-dd").format(new Date()) + " \n" + " */" out.println "" out.println "@Data" out.println "@Entity" out.println "@AllArgsConstructor" out.println "@Builder" out.println "@NoArgsConstructor" out.println "@Table ( name =\""+table.getName() +"\" )" out.println "public class $className implements Serializable {" out.println genSerialID() // 判断自增 if ((tableName + "_id").equalsIgnoreCase(fields[0].colum) || "id".equalsIgnoreCase(fields[0].colum)) { out.println "\t@Id" out.println "\t@GeneratedValue(generator = \"idGenerator\")" out.println "\t@GenericGenerator(name = \"idGenerator\", strategy = ChiticCoreConstant.ID_GENERATOR_COMMON)" } fields.each() { out.println "" // 输出注释 if (isNotEmpty(it.commoent)) { out.println "\t/**" out.println "\t * ${it.commoent.toString()}" out.println "\t */" } if (it.annos != "") out.println " ${it.annos.replace("[@Id]", "")}" // 输出成员变量 out.println "\tprivate ${it.type} ${it.name};" } // 输出get/set方法 // fields.each() { // out.println "" // out.println "\tpublic ${it.type} get${it.name.capitalize()}() {" // out.println "\t\treturn this.${it.name};" // out.println "\t}" // out.println "" // // out.println "\tpublic void set${it.name.capitalize()}(${it.type} ${it.name}) {" // out.println "\t\tthis.${it.name} = ${it.name};" // out.println "\t}" // } out.println "" out.println "}" } def calcFields(table) { DasUtil.getColumns(table).reduce([]) { fields, col -> def spec = Case.LOWER.apply(col.getDataType().getSpecification()) def typeStr = typeMapping.find { p, t -> p.matcher(spec).find() }.value def comm =[ colName : col.getName(), name : javaName(col.getName(), false), type : typeStr, commoent: col.getComment(), annos: "\t@Column(name = \""+col.getName()+"\" )"] if("id".equals(Case.LOWER.apply(col.getName()))) comm.annos +=["@Id"] fields += [comm] } } // 处理类名（这里是因为我的表都是以t_命名的，所以需要处理去掉生成类名时的开头的T， // 如果你不需要那么请查找用到了 javaClassName这个方法的地方修改为 javaName 即可） def javaClassName(str, capitalize) { def s = com.intellij.psi.codeStyle.NameUtil.splitNameIntoWords(str) .collect { Case.LOWER.apply(it).capitalize() } .join("") .replaceAll(/[^\p{javaJavaIdentifierPart}[_]]/, "_") // 去除开头的T http://developer.51cto.com/art/200906/129168.htm s = s[1..s.size() - 1] capitalize || s.length() == 1? s : Case.LOWER.apply(s[0]) + s[1..-1] } def javaName(str, capitalize) { // def s = str.split(/(?<=[^\p{IsLetter}])/).collect { Case.LOWER.apply(it).capitalize() } // .join("").replaceAll(/[^\p{javaJavaIdentifierPart}]/, "_") // capitalize || s.length() == 1? s : Case.LOWER.apply(s[0]) + s[1..-1] def s = com.intellij.psi.codeStyle.NameUtil.splitNameIntoWords(str) .collect { Case.LOWER.apply(it).capitalize() } .join("") .replaceAll(/[^\p{javaJavaIdentifierPart}[_]]/, "_") capitalize || s.length() == 1? s : Case.LOWER.apply(s[0]) + s[1..-1] } def isNotEmpty(content) { return content != null && content.toString().trim().length() > 0 } static String changeStyle(String str, boolean toCamel){ if(!str || str.size() <= 1) return str if(toCamel){ String r = str.toLowerCase().split('_').collect{cc -> Case.LOWER.apply(cc).capitalize()}.join('') return r[0].toLowerCase() + r[1..-1] }else{ str = str[0].toLowerCase() + str[1..-1] return str.collect{cc -> ((char)cc).isUpperCase() ? '_' + cc.toLowerCase() : cc}.join('') } } static String genSerialID() { return "\tprivate static final long serialVersionUID = "+Math.abs(new Random().nextLong())+"L;" }
Generate Dao.groovy文件（生成dao）：
package src import com.intellij.database.model.DasTable import com.intellij.database.util.Case import com.intellij.database.util.DasUtil /* * Available context bindings: * SELECTION Iterable<DasObject> * PROJECT project * FILES files helper */ packageName = "**;" // 需手动配置 生成的 dao 所在包位置 FILES.chooseDirectoryAndSave("Choose directory", "Choose where to store generated files") { dir -> SELECTION.filter { it instanceof DasTable }.each { generate(it, dir) } } def generate(table, dir) { def baseName = javaName(table.getName(), true) new File(dir, baseName + "Mapper.java").withPrintWriter { out -> generateInterface(out, baseName) } } def generateInterface(out, baseName) { def date = new Date().format("yyyy/MM/dd") out.println "package $packageName" out.println "import cn.xx.entity.${baseName}Entity;" // 需手动配置 out.println "import org.springframework.stereotype.Repository;" out.println "" out.println "/**" out.println " * Created on $date." out.println " *" out.println " * @author GX" // 可自定义 out.println " */" out.println "@Repository" out.println "public interface ${baseName}Dao extends BaseDao<${baseName}Entity> {" // 可自定义 out.println "" out.println "}" } def javaName(str, capitalize) { def s = com.intellij.psi.codeStyle.NameUtil.splitNameIntoWords(str) .collect { Case.LOWER.apply(it).capitalize() } .join("") .replaceAll(/[^\p{javaJavaIdentifierPart}[_]]/, "_") name = capitalize || s.length() == 1 ? s : Case.LOWER.apply(s[0]) + s[1..-1] }
Generate DaoXml.groovy文件（生成dao.xml）：
package src import com.intellij.database.model.DasTable import com.intellij.database.util.Case import com.intellij.database.util.DasUtil /* * Available context bindings: * SELECTION Iterable<DasObject> * PROJECT project * FILES files helper */ // entity(dto)、mapper(dao) 与数据库表的对应关系在这里手动指明,idea Database 窗口里只能选下列配置了的 mapper // tableName(key) : [mapper(dao),entity(dto)] typeMapping = [ (~/(?i)int/) : "INTEGER", (~/(?i)float|double|decimal|real/): "DOUBLE", (~/(?i)datetime|timestamp/) : "TIMESTAMP", (~/(?i)date/) : "TIMESTAMP", (~/(?i)time/) : "TIMESTAMP", (~/(?i)/) : "VARCHAR" ] basePackage = "com.chitic.bank.mapping" // 包名需手动填写 FILES.chooseDirectoryAndSave("Choose directory", "Choose where to store generated files") { dir -> SELECTION.filter { it instanceof DasTable }.each { generate(it, dir) } } def generate(table, dir) { def baseName = mapperName(table.getName(), true) def fields = calcFields(table) new File(dir, baseName + "Mapper.xml").withPrintWriter { out -> generate(table, out, baseName, fields) } } def generate(table, out, baseName, fields) { def baseResultMap = 'BaseResultMap' def base_Column_List = 'Base_Column_List' def date = new Date().format("yyyy/MM/dd") def tableName = table.getName() def dao = basePackage + ".dao.${baseName}Mapper" def to = basePackage + ".to.${baseName}TO" out.println mappingsStart(dao) out.println resultMap(baseResultMap, to, fields) out.println sql(fields, base_Column_List) out.println selectById(tableName, fields, baseResultMap, base_Column_List) out.println deleteById(tableName, fields) out.println delete(tableName, fields, to) out.println insert(tableName, fields, to) out.println update(tableName, fields, to) out.println selectList(tableName, fields, to, base_Column_List, baseResultMap) out.println mappingsEnd() } static def resultMap(baseResultMap, to, fields) { def inner = '' fields.each() { inner += '\t\t<result column="' + it.sqlFieldName + '" jdbcType="' + it.type + '" property="' + it.name + '"/>\n' } return '''\t<resultMap id="''' + baseResultMap + '''" type="''' + to + '''"> <id column="id" jdbcType="INTEGER" property="id"/> ''' + inner + '''\t</resultMap> ''' } def calcFields(table) { DasUtil.getColumns(table).reduce([]) { fields, col -> def spec = Case.LOWER.apply(col.getDataType().getSpecification()) def typeStr = typeMapping.find { p, t -> p.matcher(spec).find() }.value fields += [[ comment : col.getComment(), name : mapperName(col.getName(), false), sqlFieldName: col.getName(), type : typeStr, annos : ""]] } } def mapperName(str, capitalize) { def s = com.intellij.psi.codeStyle.NameUtil.splitNameIntoWords(str) .collect { Case.LOWER.apply(it).capitalize() } .join("") .replaceAll(/[^\p{javaJavaIdentifierPart}[_]]/, "_") name = capitalize || s.length() == 1 ? s : Case.LOWER.apply(s[0]) + s[1..-1] } // ------------------------------------------------------------------------ mappings static def mappingsStart(mapper) { return '''<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="''' + mapper + '''"> ''' } // ------------------------------------------------------------------------ mappings static def mappingsEnd() { return '''</mapper>''' } // ------------------------------------------------------------------------ selectById static def selectById(tableName, fields, baseResultMap, base_Column_List) { return ''' <select id="selectById" parameterType="java.lang.Integer" resultMap="''' + baseResultMap + '''"> select <include refid="''' + base_Column_List + '''"/> from ''' + tableName + ''' where id = #{id} </select>''' } // ------------------------------------------------------------------------ insert static def insert(tableName, fields, parameterType) { return ''' <insert id="insert" parameterType="''' + parameterType + '''"> insert into ''' + tableName + ''' <trim prefix="(" suffix=")" suffixOverrides=","> ''' + testNotNullStr(fields) + ''' </trim> <trim prefix="values (" suffix=")" suffixOverrides=","> ''' + testNotNullStrSet(fields) + ''' </trim> </insert> ''' } // ------------------------------------------------------------------------ update static def update(tableName, fields, parameterType) { return ''' <update id="update" parameterType="''' + parameterType + '''"> update ''' + tableName + ''' <set> ''' + testNotNullStrWhere(fields) + ''' </set> where id = #{id} </update>''' } // ------------------------------------------------------------------------ deleteById static def deleteById(tableName, fields) { return ''' <delete id="deleteById" parameterType="java.lang.Integer"> delete from ''' + tableName + ''' where id = #{id} </delete>''' } // ------------------------------------------------------------------------ delete static def delete(tableName, fields, parameterType) { return ''' <delete id="delete" parameterType="''' + parameterType + '''"> delete from ''' + tableName + ''' where 1 = 1 ''' + testNotNullStrWhere(fields) + ''' </delete>''' } // ------------------------------------------------------------------------ selectList static def selectList(tableName, fields, parameterType, base_Column_List, baseResultMap) { return ''' <select id="selectList" parameterType="''' + parameterType + '''" resultMap="''' + baseResultMap + '''"> select <include refid="''' + base_Column_List + '''"/> from ''' + tableName + ''' where 1 = 1 ''' + testNotNullStrWhere(fields) + ''' order by id desc </select>''' } // ------------------------------------------------------------------------ sql static def sql(fields, base_Column_List) { def str = '''\t<sql id="''' + base_Column_List + '''"> @inner@ </sql> ''' def inner = '' fields.each() { inner += ('\t\t' + it.sqlFieldName + ',\n') } return str.replace("@inner@", inner.substring(0, inner.length() - 2)) } static def testNotNullStrWhere(fields) { def inner = '' fields.each { inner += ''' <if test="''' + it.name + ''' != null"> and ''' + it.sqlFieldName + ''' = #{''' + it.name + '''} </if>\n''' } return inner } static def testNotNullStrSet(fields) { def inner = '' fields.each { inner += ''' <if test="''' + it.name + ''' != null"> #{''' + it.name + '''}, </if>\n''' } return inner } static def testNotNullStr(fields) { def inner1 = '' fields.each { inner1 += ''' <if test = "''' + it.name + ''' != null" > \t''' + it.sqlFieldName + ''', </if>\n''' } return inner1 }
