IDEA 生成带注释的实体类 脚本

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.sql.Date


/*
 * Available context bindings:
 *   SELECTION   Iterable<DasObject>
 *   PROJECT     project
 *   FILES       files helper
 */

/**
 * 通过Databas生成实体类
 * 自动识别类型
 * 加字段注释
 */

packageName = ""

//类型字典
typeMapping = [  
        (~/(?i)tinyint|smallint|mediumint|int/)     : "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 = changeStyle(javaName(table.getName(), true), 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 lombok.Data;"
    out.println ""
    out.println "import javax.persistence.*;"
    out.println "import java.io.Serializable;"

    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" +
            " * 生成带注释的实体类 \n" +
            " * \n" +
            " * @date " + new java.sql.Date(new java.util.Date().getTime()).toString() + "\n" +
            " * @author xiefei\n" +
            " */"
    out.println ""
    out.println "@Data"
    out.println "@Entity"
    out.println "@Table(name =\"" + table.getName() + "\")"
    out.println "public class $className  implements Serializable {"
    out.println ""
    out.println genSerialID()

    fields.each() {
        out.println ""
        // 输出注释
        if (isNotEmpty(it.commoent)) {
            out.println "\t/**"
            out.println "\t * ${it.commoent}"
            out.println "\t */"
        }

        if (it.annos != "") out.println "   ${it.annos}"

        // 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    : changeStyle(javaName(col.getName(), false), true),
                type    : typeStr,
                commoent: col.getComment(),
//                annos   : "\t@Column(name = \"" + col.getName() + "\")"]
                annos   : "\t@Column(name = \"`" + col.getName() + "`\")"]
        if ("id".equals(Case.LOWER.apply(col.getName()))) {
            comm.annos = " @Id"

            if ("Integer".equals(typeStr)) {
                comm.annos += "\n\t@GeneratedValue(strategy = GenerationType.IDENTITY)"
            }
        }
        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 = str.split(/[^\p{Alnum}]/).collect { def s = Case.LOWER.apply(it).capitalize() }.join("")
    // 去除开头的T  http://developer.51cto.com/art/200906/129168.htm
    s = s[1..s.size() - 1]
    capitalize ? 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 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('')
    }
}

// 生成serialVersionUID
static String genSerialID() {  
    return "\tprivate static final long serialVersionUID =  " + Math.abs(new Random().nextLong()) + "L;"
}

将以上代码保存成GenerateScript.groovy文件, 放在IDEA\config\extensions\com.intellij.database\schema目录下