[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:,UN07s
} U (7P X`1
int i1=l; ,O{ 5
int i2=mid+1; A0u:Fm{E
for(int cur=l;cur<=r;cur++){ O t<%gj;^
if(i1==mid+1) A"VXs1>_^
data[cur]=temp[i2++]; L([>yQZ
else if(i2>r) ''Ec-b6Q-
data[cur]=temp[i1++]; svjFy/T(lL
else if(temp[i1] data[cur]=temp[i1++]; EZRZ)h
else 1)Bi>X
data[cur]=temp[i2++]; E9-'!I!
} (k.7q~:
} =8_TOvSJ4p
Y!$z7K
} ]3jH^7[?
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改进后的归并排序: j&GKpt
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package org.rut.util.algorithm.support; jk}PucV
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import org.rut.util.algorithm.SortUtil; 9GaER+d|
j=>Gfo
/** Vs"Q-?
* @author treeroot ofCP>Z-
* @since 2006-2-2 UF&Wgj [
* @version 1.0 /2cOZ1G;
*/ |XG7UH
public class ImprovedMergeSort implements SortUtil.Sort { dsuW4^l
S@($c'
private static final int THRESHOLD = 10; `2
TY?io@
/* imQNfNm
* (non-Javadoc) uB5o Ghu-
* d^^>3L!h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CFxs`C^
*/ ohk =7d.'
public void sort(int[] data) { U6PUt'Kk@
int[] temp=new int[data.length]; ]!w52kF7
mergeSort(data,temp,0,data.length-1); 7IH{5o\e
} 8!Kfe
!/j|\_O
private void mergeSort(int[] data, int[] temp, int l, int r) { Kn|dnq|G
int i, j, k; 8+F2 !IM
int mid = (l + r) / 2; 0AenDm@9
if (l == r) e(A&VIp
return; '9XwUQx
if ((mid - l) >= THRESHOLD) ;ecF~-oku
mergeSort(data, temp, l, mid); n\U6oJN
else j)Gr@F>
insertSort(data, l, mid - l + 1); C?k4<B7V
if ((r - mid) > THRESHOLD) ,0xN#&?Ohh
mergeSort(data, temp, mid + 1, r); (fS4qz:&l
else S)?B I
insertSort(data, mid + 1, r - mid); T^t`Hp
#D8)rs.9
for (i = l; i <= mid; i++) { `h#JDcT;a
temp = data; akoILX~u
} =6:Iv"<
for (j = 1; j <= r - mid; j++) { yMxS'j1
temp[r - j + 1] = data[j + mid]; $2 0*&4y^
} 0)#I5tEre
int a = temp[l]; ?##GY;#
int b = temp[r]; e2v,#3Q\
for (i = l, j = r, k = l; k <= r; k++) { O.!?O(
if (a < b) { xgVt0=q
data[k] = temp[i++]; +dRTHz
a = temp; xhv)rhu@
} else { j*nCIxF
data[k] = temp[j--]; ~QXNOtVsN
b = temp[j]; HU'}c*d]
} Z1zC@z4sUj
} ;(A'XA4 6N
} aqlYB7
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/** va)\uXW.N
* @param data F-t-d1w6
* @param l gi8kYHldH
* @param i @: NrC76
*/ {^v50d
private void insertSort(int[] data, int start, int len) { rmhB!Lo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'ga@=;Wj
} cuHs`{u@P
} U i;o/Z3
} Q"\[ICu!,
} H$ v4N8D8I
G{:L^2>
堆排序： 9r!%PjNvE
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package org.rut.util.algorithm.support; ) ":~`Z*@
;2$^=:8
import org.rut.util.algorithm.SortUtil; FD8aO?wvg
umj7-fh
/** hFKYRZtP.8
* @author treeroot {3?g8e]zr
* @since 2006-2-2 6SpkeXL
* @version 1.0 }b44^iL$9y
*/ /OZF3Pft
public class HeapSort implements SortUtil.Sort{ 2'++G[z
VF4F7'
/* (non-Javadoc) a/_`1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dJ$}]
*/ BPW:W }
public void sort(int[] data) { 1iz\8R:0
MaxHeap h=new MaxHeap(); L3&NGcd
h.init(data); ";Lpf]<
for(int i=0;i h.remove(); atYm.qb
System.arraycopy(h.queue,1,data,0,data.length); t&*$@0A
} B}:[~R'
K }r%OOn0
private static class MaxHeap{ mI l_ [
H>VuUH|
void init(int[] data){ QkA79%;j
this.queue=new int[data.length+1]; [IMa0qs'
for(int i=0;i queue[++size]=data; XI pXP,Yy
fixUp(size); w+Ag!O}.L
} W8\K_M}
} xl s_g/Q
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private int size=0; <pz;G}
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private int[] queue; 9NVe>\s_
TfMuQi'>
public int get() { "=HCP,
return queue[1]; @ %kCe>r
} 6kHAoERp
V\Rbnvq
public void remove() { W0X?"Ms|a
SortUtil.swap(queue,1,size--); }9jy)gF*e
fixDown(1); \6*3&p
} ;g*ab
file://fixdown 9"oc.ue.2D
private void fixDown(int k) { :v=Yo
int j; z>hA1*Ti
while ((j = k << 1) <= size) { x# 0(CcKK
if (j < size %26amp;%26amp; queue[j] j++; ?> }bg
if (queue[k]>queue[j]) file://不用交换 +:;r} 7Zh
break; rk{DrbRx
SortUtil.swap(queue,j,k); Td}#o!4!
k = j; In5'(UHW:
} 8I3"68c_a
} @MS;qoc
private void fixUp(int k) { 3S ,D~L^
while (k > 1) { |lrLTI^a
int j = k >> 1; tGe|@.!
if (queue[j]>queue[k]) \-gZ_>)
break; Pqi>,c<&mL
SortUtil.swap(queue,j,k); pS;jrq I#
k = j; #toKT_
} t L}i%7
} J[du>1D
!0{":4\
} XTyJ*`>
wz<YflF
} x~rIr#o
*^ g7kCe(
SortUtil： #/\5a;Elc
xQ=[0!p+
package org.rut.util.algorithm; XOAZ
$_%yr ~2
import org.rut.util.algorithm.support.BubbleSort; =rFgOdj
import org.rut.util.algorithm.support.HeapSort; 9K-=2hvv
import org.rut.util.algorithm.support.ImprovedMergeSort; HeCQF=R
import org.rut.util.algorithm.support.ImprovedQuickSort; sFqZ@t}~
import org.rut.util.algorithm.support.InsertSort; 9X/c%:)\=
import org.rut.util.algorithm.support.MergeSort; 89?$xm_m
import org.rut.util.algorithm.support.QuickSort; nJ<h}*[
import org.rut.util.algorithm.support.SelectionSort; Yh\} i
import org.rut.util.algorithm.support.ShellSort; #XE`8$
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/** Ew~piuj
* @author treeroot O'a Srjl
* @since 2006-2-2 yS%IE>?
* @version 1.0 x'tYf^Va28
*/ rZm|7A)i
public class SortUtil { &W)Lzpx8c
public final static int INSERT = 1; ),1MR=
public final static int BUBBLE = 2; ]-FK6jw
public final static int SELECTION = 3; Y5M>&}N
public final static int SHELL = 4; ;"l>HL:^
public final static int QUICK = 5; YtI2Vr/9
public final static int IMPROVED_QUICK = 6; ;& ny< gQ
public final static int MERGE = 7; WB<_AIt+
public final static int IMPROVED_MERGE = 8; )>abB?RZ
public final static int HEAP = 9; :f<3`x'
Au(zvgP
public static void sort(int[] data) { R`sU5:n
sort(data, IMPROVED_QUICK); 3eX;T +|o
} _7Z|=)
private static String[] name={ `&xo;Vnc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?UuJk
}; _PUgK\
Exd$v"s Y
private static Sort[] impl=new Sort[]{ tp"dho
new InsertSort(), o\6A]T=R
new BubbleSort(), 6Tjj++b(*
new SelectionSort(), Q[+&n*
new ShellSort(), ,5J-C!C
new QuickSort(), %v 0 I;t
new ImprovedQuickSort(), HF>Gf2-C
new MergeSort(), z=C'qF`
new ImprovedMergeSort(), G Xx7/X
new HeapSort() Ct2m l
}; NGZEUtj
ClZ:#uMbN
public static String toString(int algorithm){ KZ_d..l*W
return name[algorithm-1]; <,/k"Y=
} x|C[yu^c
M\\t)=q
public static void sort(int[] data, int algorithm) { yM}b
impl[algorithm-1].sort(data); G=?2{c}U
} n-iy;L^b
}@Rq'VPZd
public static interface Sort { hwgLJY?
public void sort(int[] data); ^Qrezl&
} S ykblP37
::bK{yZm
public static void swap(int[] data, int i, int j) { []B9Me
int temp = data; xe ng`!
data = data[j]; F-K=Otj
data[j] = temp; 7g@P$e]
} W[B%,Km%]
} m?LnO5Vs