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经常写一些业务代码,学会快速生成项目上业务代码所需的类entity、dao、service类对我们提高工作效率很有帮助,整理步骤如下:
一、准备工作
在idea中连接数据库
下载idea的CodeMaker插件
二、生成实体类
准备生成实体类的groovy脚本,这里我直接用写好了的脚本,因为不懂groovy,只能是在脚本上猜着改改,但实体类生成都差不多,猜着改改勉强能改到满足自己要求,下面把脚本贴上:
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 import java.lang.*; /* * Available context bindings: * SELECTION Iterable* PROJECT project * FILES files helper */ packageName = "" typeMapping = [ (~/(?i)bigint/) : "Long", (~/(?i)int|tinyint|smallint|mediumint/) : "Integer", (~/(?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 = 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) { out.println "package $packageName" out.println "" out.println "import com.yunhuakeji.component.base.annotation.doc.ApiField;" out.println "import com.yunhuakeji.component.base.annotation.entity.Code;" out.println "import com.yunhuakeji.component.base.bean.entity.base.BaseEntity;" out.println "import com.yunhuakeji.component.base.enums.entity.YesNoCodeEnum;" out.println "import lombok.Getter;" out.println "import lombok.Setter;" out.println "import lombok.ToString;" out.println "import io.swagger.annotations.ApiModel;" out.println "import io.swagger.annotations.ApiModelProperty;" out.println "import java.time.LocalDateTime;" out.println "import javax.persistence.Table;" out.println "import javax.persistence.Column;" //out.println "import import java.util.Date;" Set types = new HashSet() fields.each() { types.add(it.type) } if (types.contains("Date")) { out.println "import java.time.LocalDateTime;" } if (types.contains("InputStream")) { out.println "import java.io.InputStream;" } out.println "" out.println "/**\n" + " * @Description \n" + " * @Author chenzhicong\n" + " * @Date "+ new SimpleDateFormat("yyyy-MM-dd").format(new Date()) + " \n" + " */" out.println "" out.println "@Setter" out.println "@Getter" out.println "@ToString" out.println "@Table ( name =\""+table.getName() +"\" )" out.println "public class $className extends BaseEntity {" out.println "" out.println genSerialID() fields.each() { if(!"universityId".equals(it.name)&& !"operatorId".equals(it.name)&& !"createdDate".equals(it.name)&& !"state".equals(it.name)&& !"stateDate".equals(it.name)&& !"memo".equals(it.name)){ 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 if("Date".equals(typeStr)){ typeStr="LocalDateTime" } if(col.getName().toString().startsWith("PK_")){ typeStr = "Long" } def comm =[ colName : col.getName(), name : javaName(col.getName(), false), type : typeStr, commoent: col.getComment(), annos: "\t@Column(name = \""+col.getName()+"\" )"] if(isNotEmpty(col.getComment())){ comm.annos +="\r\n\t@ApiField(desc = \""+col.getComment()+"\")" } /* if(col.getComment().startsWith("pk_")){ comm.annos +="\r\n\t@Id" }*/ if(Case.LOWER.apply(comm.name.toString()).startsWith("pk")){ comm.annos +="\r\n\t@Id" } 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;" }
把脚本保存为groovy格式然后移动到项目目录中入图所示:
接下来就可以直接在idea右侧database中对需要生成实体类的表执行脚本了,如图所示,点击右侧的database-选择表右键-选择scripted-Extensions-然后选择添加的脚本
之后选择生成的目录为entity目录:
之后类就生成好了:
其中继承的类,引入的包,注解都可以在脚本中修改。
三、生成service、serviceImpL和dao
与实体生成不一样,这里使用codemaker插件功能生成。先在codemaker中添加模板。 进入settings,搜索codemaker,进入codemaker相关配置项。
添加所需要的模板,以生成Dao为例:上面只需要改className,这里写入${class0.className}Dao,表示取输入的类的类名后面加个Dao
模板代码也是使用现成的,自己根据需要猜着改就行,模板代码如下: dao/mapper模板:
######################################################################################## ## ## Common variables: ## $YEAR - yyyy ## $TIME - yyyy-MM-dd HH:mm:ss ## $USER - 陈之聪 ## ## Available variables: ## $class0 - the context class, alias: $class ## $class1 - the selected class, like $class1, $class2 ## $ClassName - generate by the config of "Class Name", the generated class name ## ## Class Entry Structure: ## $class0.className - the class Name ## $class0.packageName - the packageName ## $class0.importList - the list of imported classes name ## $class0.fields - the list of the class fields ## - type: the field type ## - name: the field name ## - modifier: the field modifier, like "private",or "@Setter private" if include annotations ## $class0.allFields - the list of the class fields include all fields of superclass ## - type: the field type ## - name: the field name ## - modifier: the field modifier, like "private",or "@Setter private" if include annotations ## $class0.methods - the list of class methods ## - name: the method name ## - modifier: the method modifier, like "private static" ## - returnType: the method returnType ## - params: the method params, like "(String name)" ## $class0.allMethods - the list of class methods include all methods of superclass ## - name: the method name ## - modifier: the method modifier, like "private static" ## - returnType: the method returnType ## - params: the method params, like "(String name)"# ######################################################################################## package $class0.PackageName; import com.mapper.GeneralMapper; /** * * @author chenzhicong * @version $Id: ${ClassName}.java, v 0.1 $TIME $USER Exp $$ */ public interface $ClassName extends GeneralMapper<${class0.className}>{ }
service、serviceImpl操作方法类似,就不赘述了,按照上面的方法分别建立模板就行。
模板建立好了之后,我们就只需要在刚刚生成的实体类中按快捷键Alt+Insert(或者右键-Generate)-选择对应模板-然后选择生成目录:
这里好像只能生成在entity同目录,不能选择其他目录,需要我们移动到对应的包。 生成后的dao如图所示:
总结
至此,代码就生成完毕了,这个方法让自己初次接触到了groovy脚本,不过还是不会怎么用,不过凑合复制粘贴别人的脚本也能改改。先就这样吧,以后遇到相关该脚本的问题再百度。
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