Oracle_PL-SQL_JavaSource_13

JAVA Source

有的时候，我们需要在Oracle的Prodedure、Function中调用JAVA代码来实现功能，比方说下面的这个例子，调用JAVA代码来实现大小写金额的转换，如果这个代码用PL实现，难度还是有的，那如果我们先写成JAVA代码，然后通过调用，来实现，还是可以的。

创建

--create or replace and compile java source named javasource_name--as --package package_name/** java code here*/CREATE or replace and compile java source named js_translaterASpackage com.yzupope.util;/** 人民币大小写金额转化*/public class XhgUtil {  private static final String UNIT = "万千佰拾亿千佰拾万千佰拾元角分";  private static final String DIGIT = "零壹贰叁肆伍陆柒捌玖";  private static final double MAX_VALUE = 9999999999999.99D;  public static String trans(double v) {    if (v < 0 || v > MAX_VALUE)      return "参数非法!";    long l = Math.round(v * 100);//round(double a):返回最接近参数的long(返回值为static long)        if (l == 0)      return "零元整";    String strValue = l + "";    // j用来控制单位    int j = UNIT.length() - strValue.length();    String rs = "";    boolean isZero = false;    // i用来控制数    for (int i = 0; i < strValue.length(); i++, j++) {      char ch = strValue.charAt(i);      if (ch == '0') {        isZero = true;        if (UNIT.charAt(j) == '亿' || UNIT.charAt(j) == '万'            || UNIT.charAt(j) == '元') {          rs = rs + UNIT.charAt(j);          isZero = false;        }      } else {        if (isZero) {          rs = rs + "零";          isZero = false;        }        rs = rs + DIGIT.charAt(ch - '0') + UNIT.charAt(j);      }    }    if (!rs.endsWith("角") && !rs.endsWith("分")) {      rs = rs + "整";    }    rs = rs.replaceAll("亿万", "亿");    return rs;  }}

创建引用

CREATE OR REPLACE FUNCTION xchg(v NUMBER) RETURN VARCHAR2ASLANGUAGE JAVA NAME com.yzupope.util.XhgUtil.trans(double)return java.lang.String';

函数调用

select xchg(105.91) FROM dual;

Where are java classes stored in Oracle?（如何查看呢）

SELECT object_name, object_type, status, TIMESTAMPFROM   user_objectsWHERE  (object_name NOT LIKE 'SYS_%' AND object_name NOT LIKE 'CREATE$%' AND       object_name NOT LIKE 'JAVA$%' AND object_name NOT LIKE 'LOADLOB%')       AND object_type LIKE 'JAVA %'ORDER  BY object_type, object_name;

当然也可以通过工具查看

点击下载《大小写金额转化》《大小写金额转换IN Excel》