[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; Iw<: k
} u`]J]gE
int i1=l; 7O,y%NWaK
int i2=mid+1; 2/c^3[ccR
for(int cur=l;cur<=r;cur++){ oe8sixZ[
if(i1==mid+1) 2yyJ19Iul
data[cur]=temp[i2++]; ^U`Bj*"2
else if(i2>r) VHlN;6Qlff
data[cur]=temp[i1++]; -W:te7
else if(temp[i1] data[cur]=temp[i1++]; ,L"1Ah
else h!L/ZeRaV
data[cur]=temp[i2++]; w<ol$2&B
} / ao|v
} 2V1|b`b#4
BSGC.>$s
} wewYlm5@
VNmQ'EuV}2
改进后的归并排序: gJ8+HV
fgW>U*.ar
package org.rut.util.algorithm.support; vThK@P!s
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import org.rut.util.algorithm.SortUtil; o"Dk`L2
!4(X9}a
/** 4[ 7)$
* @author treeroot :|\{mo1NB
* @since 2006-2-2 <=D\Ckmb
* @version 1.0 I+?9}t
*/ #xMl<
public class ImprovedMergeSort implements SortUtil.Sort { />Z`?
avb'J^}f
private static final int THRESHOLD = 10; BP6|^Q
k-$5H~(PZ
/* 1FCHqqZ=
* (non-Javadoc) :q.g#:1s
* l1&NU'WW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;w/|5 ;{A;
*/ NT^m.o~4
public void sort(int[] data) { LB1AjNJ
int[] temp=new int[data.length]; YQ&Ww|xe
mergeSort(data,temp,0,data.length-1); ^11y8[[
} 6i6m*=h
%q~YJ*\
private void mergeSort(int[] data, int[] temp, int l, int r) { c/G4@D>
int i, j, k; 7Z#r9Vr
int mid = (l + r) / 2; 3q!hY
if (l == r) xIN&>D'|N
return; vnNX)$f
if ((mid - l) >= THRESHOLD) P9Yw\
mergeSort(data, temp, l, mid); 0~(K@U>#
else /YP,Wfd%
insertSort(data, l, mid - l + 1); BP&T|s
if ((r - mid) > THRESHOLD) ]5V=kNui
mergeSort(data, temp, mid + 1, r); dOm@cs
else o1m+4.-
insertSort(data, mid + 1, r - mid); 5cv&`h8uo_
6%hr]>L
for (i = l; i <= mid; i++) { 7wivu*0
temp = data; "G^Z>Z-`
} E^)>9f7
for (j = 1; j <= r - mid; j++) { JH4hy9i
temp[r - j + 1] = data[j + mid]; m~[4eH,
} i;u#<y{E
int a = temp[l]; *Vbf;=Mb
int b = temp[r]; VO (KQx
for (i = l, j = r, k = l; k <= r; k++) { }=dUASL
if (a < b) { &%@b;)]J
data[k] = temp[i++]; B#>7;xy>
a = temp; 0^H"eQO
} else { =N62 ){{
data[k] = temp[j--]; r~K5jL%z9
b = temp[j]; ZU=omRh5
} xppl6v(
} BwLggo
} i#&iT P`
r%craf
/** I`$"6 Xy
* @param data ma +iIt;
* @param l 1BA/$8G
* @param i Ihd{@6m
*/ 8=GgTpO5
private void insertSort(int[] data, int start, int len) { JE a~avyJ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); tJ"8"T#6Vr
} 6aw1
} zS9HR1
} `b11,lg
} !mjrI "_
-`I&hzl6E
堆排序： B<p-qPR K
b"DV8fdX
package org.rut.util.algorithm.support; 6T?$m7c
.T2P%Jn.
import org.rut.util.algorithm.SortUtil; pR3@loFQ`o
>@Nn_d
/** m-<"`:+
* @author treeroot 'n>v}__&|
* @since 2006-2-2 sjZ@}Vk3b
* @version 1.0 gB3Tz(!
*/ 4Y2!q$}I+
public class HeapSort implements SortUtil.Sort{ 8|z@"b l)
lU`}
/* (non-Javadoc) H%peE9>$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !Ojf9 6is
*/ (bX77 Xr
public void sort(int[] data) { ]O^C'GzZ
MaxHeap h=new MaxHeap(); L[D<e?j
h.init(data); wWI1%#__|o
for(int i=0;i h.remove(); kH.W17D~
System.arraycopy(h.queue,1,data,0,data.length); Vr<eU>W
} U.$7=Zl8t
m0}1P]dc
private static class MaxHeap{ 0qCx.<"p8#
[P3].#"]M=
void init(int[] data){ 69/br @j%`
this.queue=new int[data.length+1]; z0jF.ub
for(int i=0;i queue[++size]=data; ;(F_2&he
fixUp(size); nlq"OzcH04
} Izapx\GK9
} Rv/=bY
$:RP tG
private int size=0; u ? }T)B
hhM?I$t:
private int[] queue; /c&;WlE/n
r(VGdG
public int get() { Ft[)m#Dj`
return queue[1]; l0v]+>1i:
} Ag82tDL[u
fF|m~#y
public void remove() { f4[Bj{F
SortUtil.swap(queue,1,size--); 4Odf6v,*@
fixDown(1); 6^+T_{gl
} ,ix>e
file://fixdown M>yt\qbkA
private void fixDown(int k) { Qy!;RaA3T
int j; Ih;I&D+e;
while ((j = k << 1) <= size) { zm&?G
if (j < size %26amp;%26amp; queue[j] j++; ] 'B4O1
if (queue[k]>queue[j]) file://不用交换 8HaBil
break; K:JM*4W
SortUtil.swap(queue,j,k); s?,\aSsU@
k = j; -s!cZ3
} }#Q?\
} 6p}dl>T_y
private void fixUp(int k) { 8rNRQOXOa
while (k > 1) { 2," (
int j = k >> 1; p%]ZG,
if (queue[j]>queue[k]) Jg2*$gL;_
break; n a3st*3V_
SortUtil.swap(queue,j,k); Cu`uP[# ch
k = j; (nUSgZz5
} kWKAtv5@w
} K]Rb~+a<
rQ:+LVfXjA
} u]uUm1Er
|/M^q{h&7s
} A4mnm6Tf
}Y=X{3+~.
SortUtil： F5(DA
s~)I1G
package org.rut.util.algorithm; H7}@56
6$y$ VeW
import org.rut.util.algorithm.support.BubbleSort; .*,W%r?1n6
import org.rut.util.algorithm.support.HeapSort; )bkJ['9
import org.rut.util.algorithm.support.ImprovedMergeSort; *$Tz g!/
import org.rut.util.algorithm.support.ImprovedQuickSort; .271at#-
import org.rut.util.algorithm.support.InsertSort; p4sU:
import org.rut.util.algorithm.support.MergeSort; ;&~9k?v7L
import org.rut.util.algorithm.support.QuickSort; ,mY3oyu
import org.rut.util.algorithm.support.SelectionSort; rF:l+I]
import org.rut.util.algorithm.support.ShellSort; <AN=@`+
Lt?k$U{qe)
/** $psPNJG
* @author treeroot [a2Q ^ab
* @since 2006-2-2 =kiDW6 JJU
* @version 1.0 7FYq6wi
*/ vkK8D#K
public class SortUtil { c)q'" r
public final static int INSERT = 1; '#ow9w+^
public final static int BUBBLE = 2; -n#fj;.2_
public final static int SELECTION = 3; P6~&,a
public final static int SHELL = 4; 5W4Tp% Lda
public final static int QUICK = 5; }n;.E&<[
public final static int IMPROVED_QUICK = 6; Pg%k>~i
public final static int MERGE = 7; 6jpfo'uB$
public final static int IMPROVED_MERGE = 8; +j!$88%Z{
public final static int HEAP = 9; $Ao iH{f
yM`QVO!;
public static void sort(int[] data) { e'MLLC[
sort(data, IMPROVED_QUICK); OY'6~w9
} 37U$9]
private static String[] name={ Y3M"a8e'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8v12<ktR`
}; $?M$^-(e
*3s,~<''%
private static Sort[] impl=new Sort[]{ #P/}'rdt
new InsertSort(), Cz)/Bq
new BubbleSort(), SYaL@54
new SelectionSort(), Nxr%xTD
new ShellSort(), [qHtN.
new QuickSort(), NB)$l2<d
new ImprovedQuickSort(), {K ,-fbE
new MergeSort(), ;]I~AGH:
new ImprovedMergeSort(), *m.4)2u=
new HeapSort() =t!$72g\
}; ZD`p$:pT
RuBL_Vi
public static String toString(int algorithm){ 7Pp~)Kq=
return name[algorithm-1]; JXKo zy41
} me`|i-
%}ASll0uq
public static void sort(int[] data, int algorithm) { "IMq +
impl[algorithm-1].sort(data); $QC^hC
} /vrjg)fer
ki<4G
public static interface Sort { }:9UI
public void sort(int[] data); yTpvKCC
} <52)
M?G4k]
public static void swap(int[] data, int i, int j) { -xMM}r y
int temp = data; cjyb:gAO
data = data[j]; A>Y!d9]ti
data[j] = temp; 0?/vcsO
} dePI&z:
} 6,j&u7