2019独角兽企业重金招聘Python工程师标准>>>

package mysql.tool;import java.util.List;import mysql.model.LoanTransferDto;public class MapperUtils {public static String genBaseResultMap(Class<?> clazz){List<String> fieldList = BeanUtil.getBeanPropertyList(clazz);StringBuffer sb = new StringBuffer();sb.append("<resultMap id=\"BaseResultMap\" type=\""+clazz.getSimpleName().toUpperCase()+"\">\r\n");int index = 0;for (String fields : fieldList) {String[] fieldArr = fields.split("`");String columnStr = toColumn(fieldArr[1]);if(index==0){sb.append("  <id column=\""+columnStr+"\" jdbcType=\"BIGINT\" property=\""+fieldArr[1]+"\" />\r\n");}else{String jdbcType = "varchar";if(fieldArr[0].equals("int")||fieldArr[0].equals("Integer")){jdbcType = "Integer";}else if(fieldArr[0].equals("long")||fieldArr[0].equals("Long")){jdbcType = "bigInt";}else if(fieldArr[0].equals("Date")||fieldArr[1].contains("Time")||fieldArr[1].contains("Date")){jdbcType = "TIMESTAMP";}sb.append("  <result column=\""+columnStr+"\" jdbcType=\""+jdbcType.toUpperCase()+"\" property=\""+fieldArr[1]+"\" />\r\n");}index++;}sb.append("</resultMap>\r\n");return sb.toString();}//生成删除语句public static String genDeleteMap(String tableNamePreFix,Class<?> clazz){List<String> fieldList = BeanUtil.getBeanPropertyList(clazz);String tableName =(tableNamePreFix+toColumn(clazz.getSimpleName())).toUpperCase();StringBuffer sb = new StringBuffer();sb.append("<delete id=\"deleteByPrimaryKey\" parameterType=\"java.lang.Long\">\r\n");sb.append("   delete from "+tableName+"  where id = #{id,jdbcType=BIGINT}\r\n");sb.append("</delete>\r\n");return sb.toString();}//生成插入语句public static String genInsertMap(String tableNamePreFix,Class<?> clazz){List<String> fieldList = BeanUtil.getBeanPropertyList(clazz);String tableName =(tableNamePreFix+toColumn(clazz.getSimpleName())).toUpperCase();StringBuffer sb = new StringBuffer();sb.append("<insert id=\"insert\" parameterType=\""+clazz.getSimpleName().toUpperCase()+"\">\r\n");StringBuffer columnAppend = new StringBuffer();StringBuffer valuesAppend = new StringBuffer();int index = 0;String idFields = "";for (String fields : fieldList) {String[] fieldArr = fields.split("`");if(index>0){String jdbcType = "varchar";if(fieldArr[0].equals("int")||fieldArr[0].equals("Integer")){jdbcType = "Integer";}else if(fieldArr[0].equals("long")||fieldArr[0].equals("Long")){jdbcType = "bigInt";}else if(fieldArr[0].equals("Date")||fieldArr[1].contains("Time")||fieldArr[1].contains("Date")){jdbcType = "TIMESTAMP";}columnAppend.append("    "+toColumn(fieldArr[1])+",\r\n");valuesAppend.append("    #{"+fieldArr[1]+",jdbcType="+jdbcType.toUpperCase()+"},\r\n");}else{idFields = fieldArr[1];}index++;}columnAppend.deleteCharAt(columnAppend.lastIndexOf(","));valuesAppend.deleteCharAt(valuesAppend.lastIndexOf(","));sb.append("  insert into "+tableName+"("+columnAppend.toString()+") values("+valuesAppend+")\r\n");sb.append("</insert>\r\n");return sb.toString();}//生成更新语句public static String genUpdateMap(String tableNamePreFix,Class<?> clazz){List<String> fieldList = BeanUtil.getBeanPropertyList(clazz);String tableName =(tableNamePreFix+toColumn(clazz.getSimpleName())).toUpperCase();StringBuffer sb = new StringBuffer();sb.append("<update id=\"updateByPrimaryKey\" parameterType=\""+clazz.getSimpleName().toUpperCase()+"\">\r\n");StringBuffer setAppend = new StringBuffer();sb.append("  update "+tableName+" set\r\n");int index = 0;String idFields = "";for (String fields : fieldList) {String[] fieldArr = fields.split("`");if(index>0){String jdbcType = "varchar";if(fieldArr[0].equals("int")||fieldArr[0].equals("Integer")){jdbcType = "Integer";}else if(fieldArr[0].equals("long")||fieldArr[0].equals("Long")){jdbcType = "bigInt";}else if(fieldArr[0].equals("Date")||fieldArr[1].contains("Time")||fieldArr[1].contains("Date")){jdbcType = "TIMESTAMP";}String column = toColumn(fieldArr[1]);setAppend.append("    "+column+" = #{"+fieldArr[1]+",jdbcType="+jdbcType.toUpperCase()+"},\r\n");}else{idFields = fieldArr[1];}index++;}setAppend.deleteCharAt(setAppend.lastIndexOf(","));sb.append(setAppend.toString());sb.append("  where "+toColumn(idFields)+" = #{"+idFields+",jdbcType=BIGINT}\r\n");sb.append("</update>\r\n");return sb.toString();}//生成更新语句public static String genSelectByIdMap(String tableNamePreFix,Class<?> clazz){List<String> fieldList = BeanUtil.getBeanPropertyList(clazz);String tableName =(tableNamePreFix+toColumn(clazz.getSimpleName())).toUpperCase();StringBuffer sb = new StringBuffer();sb.append("<select id=\"selectByPrimaryKey\" parameterType=\"java.lang.Long\" resultMap=\"BaseResultMap\">\r\n");StringBuffer columnAppend = new StringBuffer();StringBuffer valuesAppend = new StringBuffer();int index = 0;String idFields = "";for (String fields : fieldList) {String[] fieldArr = fields.split("`");if(index>0){String jdbcType = "varchar";if(fieldArr[0].equals("int")||fieldArr[0].equals("Integer")){jdbcType = "Integer";}else if(fieldArr[0].equals("long")||fieldArr[0].equals("Long")){jdbcType = "bigInt";}else if(fieldArr[0].equals("Date")||fieldArr[1].contains("Time")||fieldArr[1].contains("Date")){jdbcType = "TIMESTAMP";}columnAppend.append("    "+toColumn(fieldArr[1])+",\r\n");valuesAppend.append("    #{"+fieldArr[1]+",jdbcType="+jdbcType.toUpperCase()+"},\r\n");}else{idFields = fieldArr[1];}index++;}columnAppend.deleteCharAt(columnAppend.lastIndexOf(","));valuesAppend.deleteCharAt(valuesAppend.lastIndexOf(","));sb.append("  select "+columnAppend.toString()+" from "+tableName+" ");sb.append("  where "+toColumn(idFields)+" = #{"+idFields+",jdbcType=BIGINT}\r\n");sb.append("</select>\r\n");return sb.toString();}public static String toColumn(String word) {StringBuffer sb = new StringBuffer();for (int i = 0; i < word.length(); i++) {char c = word.charAt(i);if (Character.isUpperCase(c)) {sb.append("_"+c);}else{sb.append(c);}}return sb.toString().toLowerCase();}public static void main(String[] args) {System.out.println(genBaseResultMap(LoanTransferDto.class));System.out.println(genDeleteMap("JGJ",LoanTransferDto.class));System.out.println(genInsertMap("JGJ",LoanTransferDto.class));System.out.println(genUpdateMap("JGJ",LoanTransferDto.class));System.out.println(genSelectByIdMap("JGJ",LoanTransferDto.class));//System.out.println(toColumn("loanType"));}}

生成后的效果：

<resultMap id="BaseResultMap" type="LOANTRANSFERDTO">
  <id column="ltid" jdbcType="BIGINT" property="ltid" />
  <result column="mid" jdbcType="BIGINT" property="mid" />
  <result column="loan_no" jdbcType="VARCHAR" property="loanNo" />
  <result column="title" jdbcType="VARCHAR" property="title" />
  <result column="bid_count" jdbcType="BIGINT" property="bidCount" />
  <result column="bid_amount" jdbcType="BIGINT" property="bidAmount" />
  <result column="rate" jdbcType="BIGINT" property="rate" />
  <result column="transfer_amount" jdbcType="BIGINT" property="transferAmount" />
  <result column="loan_cycle" jdbcType="BIGINT" property="loanCycle" />
  <result column="loan_cycle_attr" jdbcType="INTEGER" property="loanCycleAttr" />
  <result column="update_time" jdbcType="TIMESTAMP" property="updateTime" />
  <result column="create_time" jdbcType="TIMESTAMP" property="createTime" />
</resultMap>

<delete id="deleteByPrimaryKey" parameterType="java.lang.Long">
   delete from JGJ_LOAN_TRANSFER_DTO  where id = #{id,jdbcType=BIGINT}
</delete>

<insert id="insert" parameterType="LOANTRANSFERDTO">
  insert into JGJ_LOAN_TRANSFER_DTO(    mid,
    loan_no,
    title,
    bid_count,
    bid_amount,
    rate,
    transfer_amount,
    loan_cycle,
    loan_cycle_attr,
    update_time,
    create_time
) values(    #{mid,jdbcType=BIGINT},
    #{loanNo,jdbcType=VARCHAR},
    #{title,jdbcType=VARCHAR},
    #{bidCount,jdbcType=BIGINT},
    #{bidAmount,jdbcType=BIGINT},
    #{rate,jdbcType=BIGINT},
    #{transferAmount,jdbcType=BIGINT},
    #{loanCycle,jdbcType=BIGINT},
    #{loanCycleAttr,jdbcType=INTEGER},
    #{updateTime,jdbcType=TIMESTAMP},
    #{createTime,jdbcType=TIMESTAMP}
)
</insert>

<update id="updateByPrimaryKey" parameterType="LOANTRANSFERDTO">
  update JGJ_LOAN_TRANSFER_DTO set
    mid = #{mid,jdbcType=BIGINT},
    loan_no = #{loanNo,jdbcType=VARCHAR},
    title = #{title,jdbcType=VARCHAR},
    bid_count = #{bidCount,jdbcType=BIGINT},
    bid_amount = #{bidAmount,jdbcType=BIGINT},
    rate = #{rate,jdbcType=BIGINT},
    transfer_amount = #{transferAmount,jdbcType=BIGINT},
    loan_cycle = #{loanCycle,jdbcType=BIGINT},
    loan_cycle_attr = #{loanCycleAttr,jdbcType=INTEGER},
    update_time = #{updateTime,jdbcType=TIMESTAMP},
    create_time = #{createTime,jdbcType=TIMESTAMP}
  where ltid = #{ltid,jdbcType=BIGINT}
</update>

<select id="selectByPrimaryKey" parameterType="java.lang.Long" resultMap="BaseResultMap">
  select     mid,
    loan_no,
    title,
    bid_count,
    bid_amount,
    rate,
    transfer_amount,
    loan_cycle,
    loan_cycle_attr,
    update_time,
    create_time
 from JGJ_LOAN_TRANSFER_DTO   where ltid = #{ltid,jdbcType=BIGINT}
</select>