[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; VLuhURI)
} #Jv|zf5Z
int i1=l; Q# w`ZQX3
int i2=mid+1; RU3:[(7
for(int cur=l;cur<=r;cur++){ D.zEE-cGyb
if(i1==mid+1) P08=?
data[cur]=temp[i2++]; "d60IM#N?
else if(i2>r) Ah,X?0+
data[cur]=temp[i1++]; )<bgZ, v
else if(temp[i1] data[cur]=temp[i1++]; Hn5:*;N
else ]a)o@FI
data[cur]=temp[i2++]; 7F OG^
} oa(R,{_*q
} nqNL[w6{
*HFRG)[V
} q~68)D(
CM+Nm(|\,
改进后的归并排序: o(GXv3L
p]/HZS.-b
package org.rut.util.algorithm.support; m?DI]sIv#
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import org.rut.util.algorithm.SortUtil; U|QLc
#~l(t_m{
/** ?.d6!vA
* @author treeroot +;uP) "Q/L
* @since 2006-2-2 O4w6\y3U
* @version 1.0 Gf'qPLK0
*/ 4RCD<7
public class ImprovedMergeSort implements SortUtil.Sort { 'NyIy:
x%Ph``XI
private static final int THRESHOLD = 10; 7\>P@s
b^[Ab:`}[V
/* ~.99H
* (non-Javadoc) qPeaSv]W
* fYrC;&n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @X@?jj&
*/ Y;$wD9W
public void sort(int[] data) { {"T$jV:GB
int[] temp=new int[data.length]; $VOSd<87
mergeSort(data,temp,0,data.length-1); Vmq:As^a
} &[u%ZL
{;uOc{~+
private void mergeSort(int[] data, int[] temp, int l, int r) { !nh7<VJ
int i, j, k; jdz]+Q`jq
int mid = (l + r) / 2; -]$q8Q(hM
if (l == r) 72uARF
return; g\_J
if ((mid - l) >= THRESHOLD) \*x'7c/qg
mergeSort(data, temp, l, mid); Qh*"B
else P2la/jN
insertSort(data, l, mid - l + 1); bMe/jQuL.$
if ((r - mid) > THRESHOLD) X{cFqW7
mergeSort(data, temp, mid + 1, r); D6X0(pU0
else Cngi5._Lb
insertSort(data, mid + 1, r - mid); PkM]jbLe8
ncw)VH;_-
for (i = l; i <= mid; i++) { SI_u0j4%*
temp = data; uG-t)pej
} =PU!hZj"L
for (j = 1; j <= r - mid; j++) { F|mppY'<J
temp[r - j + 1] = data[j + mid]; 'cp1I&>
} Qy0Zj$,Z
int a = temp[l]; i7rO5<
int b = temp[r]; s{g^K#BoFi
for (i = l, j = r, k = l; k <= r; k++) { 'M20v-[
if (a < b) { K qK?w*Qw
data[k] = temp[i++]; h{xq
a = temp; .J=<E
} else { *vFXe_.
data[k] = temp[j--]; !*I0}I ~
b = temp[j]; )gNS%tc*K
} h"#[{$(
} LDX>S*cL
} 1u`{yl*+?
LVHIQ9
/** <!qN<#$y
* @param data O+f'Ql
* @param l {HF,F=W
* @param i {3)^$F=T
*/ !H)Cua)
private void insertSort(int[] data, int start, int len) { -_`dA^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _P].Z8
} le7!:4/8
} ~)fd+~4L
} FdwlRuG
} tBB\^xq:
77zfRSb+
堆排序： :`Sd5b>
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package org.rut.util.algorithm.support; RyuI2jEy
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import org.rut.util.algorithm.SortUtil; $!LL
PR+L6DT_
/** tNbL)
* @author treeroot 6}/m~m
* @since 2006-2-2 ]ykMh
* @version 1.0 >Hd Pcsl L
*/ bVgmjt2&>
public class HeapSort implements SortUtil.Sort{ 6s<w}O
j&y>?Y&Sb
/* (non-Javadoc) !'5t(Zw5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (@(rz/H
*/ TGuvyY
public void sort(int[] data) { x2M{=MExE.
MaxHeap h=new MaxHeap(); Y I?4e7Z+
h.init(data); znq/ %7
for(int i=0;i h.remove(); +)<H,?/
System.arraycopy(h.queue,1,data,0,data.length); 7dh--.i
} 5^0K5R6GQf
$T2n^yz
private static class MaxHeap{ XEpwk,8*g
%YLyh?J
void init(int[] data){ GiS{=+=5
this.queue=new int[data.length+1]; R64/m9
for(int i=0;i queue[++size]=data; cERmCe|/CG
fixUp(size); @\)a&p]a
} dk@j!-q^
} ] RLEyDB
$ 0Up.
private int size=0; Op 0Qpn
Hphfqdh0`
private int[] queue; @'lO~i
|)pgUI2O[
public int get() { UEh-k"
return queue[1]; Fq`wx
} Ynx.$$`$=
> Du>vlTY
public void remove() { a"pejW`m
SortUtil.swap(queue,1,size--); 15U[F0b
fixDown(1); >&DNxw
} @;P\`[(*
file://fixdown 3`^NaQ
private void fixDown(int k) { QVJvuiUh
int j; 'boAv%1_sa
while ((j = k << 1) <= size) { nv-_\M
if (j < size %26amp;%26amp; queue[j] j++; +jrMvk"
if (queue[k]>queue[j]) file://不用交换 vkg."G:=
break; L\/YS;Y
SortUtil.swap(queue,j,k); =k|hH~
k = j; y|O)i I/g
} M hJ;)(
} EVE<LF?
private void fixUp(int k) { }29Cm$p
while (k > 1) { *=~X1s
int j = k >> 1; lBcRt)_O7
if (queue[j]>queue[k]) qcdENIy0b
break; ]>'yt #]
SortUtil.swap(queue,j,k); 3!<} -sW4
k = j; B_uAa5'
} ]Yd7
} d*(wU>J '
%n<.)R
} ,Y_[+
m<wEw-1.
} B9Z=`c.T
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SortUtil： a"|\n_
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package org.rut.util.algorithm; C~([aH@-I
ab-MEN`5
import org.rut.util.algorithm.support.BubbleSort; sXmo.{Ayb
import org.rut.util.algorithm.support.HeapSort; y|0I3n]e
import org.rut.util.algorithm.support.ImprovedMergeSort; ?ybX&V
import org.rut.util.algorithm.support.ImprovedQuickSort; `h+1u`FJ
import org.rut.util.algorithm.support.InsertSort; .jps6{
import org.rut.util.algorithm.support.MergeSort; YTo^Q&
import org.rut.util.algorithm.support.QuickSort; ;rJ
import org.rut.util.algorithm.support.SelectionSort; WKB@9Vfju
import org.rut.util.algorithm.support.ShellSort; /naGn@m5u
7IV:X _y
/** y9'F D5\s
* @author treeroot i@|.1dWh
* @since 2006-2-2 xgQ]#{tG
* @version 1.0 |Sf` Cs
*/ A1u|L^
public class SortUtil { zcTY"w\b
public final static int INSERT = 1; :1JICxAU
public final static int BUBBLE = 2; .7EZB
public final static int SELECTION = 3; &ivPY
public final static int SHELL = 4; }bxx]rDl
public final static int QUICK = 5; $}/Q%r
public final static int IMPROVED_QUICK = 6; g :Z, ab4
public final static int MERGE = 7; ]p.eFYDh7
public final static int IMPROVED_MERGE = 8; T1}9^3T?{
public final static int HEAP = 9; `'^&* 7,
/|. |y S9
public static void sort(int[] data) { ie+746tFW
sort(data, IMPROVED_QUICK); #:?MtVC
} $3C$])k
private static String[] name={ UIl^s8/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !Ho=(6V
}; D;l)&"|r?
LN?b6s75U
private static Sort[] impl=new Sort[]{ ^MZdht
new InsertSort(), M+N7JpR
new BubbleSort(), koizk&)
new SelectionSort(), W%k0_Y/5
new ShellSort(), P=jbr"5Q:
new QuickSort(), !Ci\Zg
new ImprovedQuickSort(), [!v| M
new MergeSort(), cLD-,v;c
new ImprovedMergeSort(), i%R2#F7I
new HeapSort() :8<\]}J
}; QhHexr6
;%R+]&J
public static String toString(int algorithm){ `Y`QxU!d%
return name[algorithm-1]; pdrF/U+
} L'JEkji"
Y=6b oT
public static void sort(int[] data, int algorithm) { K)`\u7Bu
impl[algorithm-1].sort(data); L,F )l2
} u/h!i@_w[
jKcnZu
public static interface Sort { 2Rp'ju~O)/
public void sort(int[] data); K)!?np{km
} #^bkM)pc
[@qUQ,Ie
public static void swap(int[] data, int i, int j) { N!e?K=}tL
int temp = data; Dl#%tYL+3h
data = data[j]; w C0fPPeA
data[j] = temp; B!hrr
} |Gw[vY
} /?; 8F