[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; "l@~WE
} 0y1t%C075
int i1=l; vaU7tJ:
int i2=mid+1; +I~?8*
for(int cur=l;cur<=r;cur++){ rLXn35O
if(i1==mid+1) u}h'v&"e,
data[cur]=temp[i2++]; x-QP+M`Pu
else if(i2>r) >L(F{c:
data[cur]=temp[i1++]; g ` {0I[
else if(temp[i1] data[cur]=temp[i1++]; }9kq?
else 97g-*K
data[cur]=temp[i2++]; }hf*Jw
} =0-qBodbl
} H9Z3.F(2
KWYG\#S0]
} ^49moC-
g[n8N{s
改进后的归并排序: Lr~K3nb
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package org.rut.util.algorithm.support; ditzl(L
x?F{=\z/o
import org.rut.util.algorithm.SortUtil; 0CR;t`M@
;|%r!!#-t
/** I"!{HnSG`
* @author treeroot (M=Br
* @since 2006-2-2 uXC?fMWp.
* @version 1.0 O*PHo_&G
*/ ) jvkwC
public class ImprovedMergeSort implements SortUtil.Sort { RAxz+1JT
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private static final int THRESHOLD = 10; kr/h^e
s [!SG`&
/* j AE0$u~.
* (non-Javadoc) W7 E-j+2
* z~_\onC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |)_R bqZ
*/ %xruPWT:k
public void sort(int[] data) { &Y>u2OZ
int[] temp=new int[data.length]; +OmSR*fA0
mergeSort(data,temp,0,data.length-1); ig,|3(
} izw}25SW
R pbl)
private void mergeSort(int[] data, int[] temp, int l, int r) { R;yAqr29
int i, j, k; ?x0yiV~dL
int mid = (l + r) / 2; 2uTa}{/%
if (l == r) ww2Qa-K
return; bi[l,
if ((mid - l) >= THRESHOLD) q ha1b$
mergeSort(data, temp, l, mid); K_aN7?#.v`
else ._3NqE;
insertSort(data, l, mid - l + 1); .R'i=D`Pz
if ((r - mid) > THRESHOLD) i=D,T[|>a
mergeSort(data, temp, mid + 1, r); ^&.?kJM
else -T8 gV1*(<
insertSort(data, mid + 1, r - mid); 1sJN^BvuG
lN'/Z&62
for (i = l; i <= mid; i++) { ""d>f4,S
temp = data; a3 x~B=E
} a*hThr+$M
for (j = 1; j <= r - mid; j++) { X A|`wAGP
temp[r - j + 1] = data[j + mid]; z,)sS<t(
} &^H "T6
int a = temp[l]; h~@+M5r,
int b = temp[r]; d/&|%Z r
for (i = l, j = r, k = l; k <= r; k++) { WdAGZUp
if (a < b) { SS~Q;9o
data[k] = temp[i++]; gT OMD
a = temp; lo:~~l
} else { c5R{Sl
data[k] = temp[j--]; yh:,[<q
b = temp[j]; cZ>W8{G
} L'Zud,JKg
} 3c3Z"JV
} `[CJtd2\
clw91yrQn
/** 'qJ-eQ7e
* @param data 02[II_< 1
* @param l R!,)?j;
* @param i gxM8IQ
*/ "~<~b2Y"5
private void insertSort(int[] data, int start, int len) { jVIpbG44
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~S6{VK.
} njMy&$6a##
} ~P_kr'o
} ]Qr8wa>Z
} ;l()3;
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堆排序： GJs[m~`8#
c!Vc_@V,
package org.rut.util.algorithm.support; J36@Pf]h
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import org.rut.util.algorithm.SortUtil; b<AE}UK
fm>K4\2
/** ]F;]<_
* @author treeroot 2hJ3m+N^
* @since 2006-2-2 ,~xU>L^
* @version 1.0 "}p?pF<'0
*/ --`LP[ll
public class HeapSort implements SortUtil.Sort{ #\BI-zt
o(/ia3
/* (non-Javadoc) dY<#a,eS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ; ZV^e
*/ 5R`6zhf
public void sort(int[] data) { `YNC_r#tG
MaxHeap h=new MaxHeap(); %E"/]!}3
h.init(data); "NH+qQhs
for(int i=0;i h.remove(); 7RE6y(V1
System.arraycopy(h.queue,1,data,0,data.length); B:4qW[U#
} ]a#]3(o]}
FM"BTA:C
private static class MaxHeap{ ~#_$?_/(
lMez!qx,=
void init(int[] data){ N>%KV8>{L
this.queue=new int[data.length+1]; T1HiHvJ
for(int i=0;i queue[++size]=data; Xl6ZV,1=n7
fixUp(size); 0DIM]PS
} kZ-~ ;fBe
} ws>Iyw.u
}#>d2 =T$
private int size=0; NoZ4['NI\
:TYzzl43
private int[] queue; 8;\tP29
jnzz~:
public int get() { KH>sCEt
return queue[1]; <S@mQJS!y
} vC<kpf!
]#q7}Sd
public void remove() { )^S^s>3
SortUtil.swap(queue,1,size--); :YXQ9/iRr
fixDown(1); |uwteG5?$s
} TL{pc=eBo
file://fixdown .N5R?fmD
private void fixDown(int k) { rbun5&RCyW
int j; gc7:Rb^E5t
while ((j = k << 1) <= size) { Rn(F#tI
if (j < size %26amp;%26amp; queue[j] j++; iH}rI'U.
if (queue[k]>queue[j]) file://不用交换 Po!JgcJ#\
break; 'Oy5G7^R
SortUtil.swap(queue,j,k); {R!TUQ5
k = j; 8tRhV2
} +Y9D!=_lj
} -_*XhD
private void fixUp(int k) { I u~aTgHX%
while (k > 1) { Doc'7P
int j = k >> 1; 'A(-MTd%
if (queue[j]>queue[k]) \ Q8q9|g?]
break; DD6`k*RIk.
SortUtil.swap(queue,j,k); obc^<ZD]
k = j; VueQP|
} @1-GPmj-
} m *bKy;'8
xKLcd+hCZ
} i =fOdp
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} ="w8U'
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SortUtil： }%ZG>LG5J
0/00W6r0
package org.rut.util.algorithm; (9 z.IH7}k
UNcJ=
import org.rut.util.algorithm.support.BubbleSort; RQ)!KlY
import org.rut.util.algorithm.support.HeapSort; IfmIX+t?
import org.rut.util.algorithm.support.ImprovedMergeSort; O{cGk: y
import org.rut.util.algorithm.support.ImprovedQuickSort; q{Ta?|x#
import org.rut.util.algorithm.support.InsertSort; :f !=_^}
import org.rut.util.algorithm.support.MergeSort; @uM3iO7&
import org.rut.util.algorithm.support.QuickSort; k#:@fH4{PA
import org.rut.util.algorithm.support.SelectionSort; Hs`#{W{.
import org.rut.util.algorithm.support.ShellSort; iMeRQYW
9s6>9hMb)
/** a2=uM}Hsp
* @author treeroot K-Dk2(x
* @since 2006-2-2 sa gBmA~
* @version 1.0 # /,2MQ
*/ # pjyhH@
public class SortUtil { g9weJ6@}M
public final static int INSERT = 1; +yP[(b/
public final static int BUBBLE = 2; 8&A|)ur4
public final static int SELECTION = 3; 3|'#n[3
public final static int SHELL = 4; JXRf4QmG
public final static int QUICK = 5; (zw=qbS&
public final static int IMPROVED_QUICK = 6; wI]R+.
public final static int MERGE = 7; k E#_Pc
public final static int IMPROVED_MERGE = 8; L[D/#0qp
public final static int HEAP = 9; Rr;LV<q+
vD)A)
public static void sort(int[] data) { T.w}6?2
sort(data, IMPROVED_QUICK); $L&9x3+?Kg
} B[/['sD
private static String[] name={ LY88;*:S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" XAULD]Q
}; lF}$`6
i h$@:^\
private static Sort[] impl=new Sort[]{ vPl6Dasr
new InsertSort(), NtA|#"^
new BubbleSort(), ZG\ I1
new SelectionSort(), Z>w^j.(
new ShellSort(), vrm{Ql&
new QuickSort(), .1z$ A
new ImprovedQuickSort(), J.e8UQ@=5
new MergeSort(), D@rn@N
new ImprovedMergeSort(), ! N"L`RWD
new HeapSort() g"dZB2`C
}; \l=KWa3Q
Q1ABnacR
public static String toString(int algorithm){ }2BH_ 2
return name[algorithm-1]; [>M*_1F
} [,o5QH\Etq
v1X&p\[d
public static void sort(int[] data, int algorithm) { r@ T-Hi
impl[algorithm-1].sort(data); IB.'4B7
} ofPF}
Nvx)H(8F
public static interface Sort { y5AXL5
public void sort(int[] data); +%le/Pg@
} X~)V)'R
\A3>c|
public static void swap(int[] data, int i, int j) { x(3 I?#kE
int temp = data; x,w`OMQ}c
data = data[j]; {Z?$Co^R
data[j] = temp; 2NArE@
} :9x084ESR)
} `3sy>GU?