[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; v@Eb[7Kq/1
} 6M&ajl`o
int i1=l; PEEaNOk 1b
int i2=mid+1; A z@@0
for(int cur=l;cur<=r;cur++){ :|kO}NGM
if(i1==mid+1) ;b65s9n^b
data[cur]=temp[i2++]; *w0|`[P+h
else if(i2>r) xP~GpVhLF
data[cur]=temp[i1++]; ds+K7B$
else if(temp[i1] data[cur]=temp[i1++]; \( V1-,
else I,#E`)
data[cur]=temp[i2++]; i[9gcL"
} \?t8[N\_[(
} @` Pn<_L
`lE&:)
} I~F&@
mD7NQ2:wA
改进后的归并排序: `AE6s.p?
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package org.rut.util.algorithm.support; >;Oa|G
C)FO:lLr\
import org.rut.util.algorithm.SortUtil; #2i$:c~
lz>00B<Z
/** Bj4c_YBte
* @author treeroot vkJyD/;=
* @since 2006-2-2 `:7r5}(^
* @version 1.0 W=A0+t%XC
*/ Tv7W)?3h
public class ImprovedMergeSort implements SortUtil.Sort { K_Y{50#
2~hdJ/
private static final int THRESHOLD = 10; wN'S+4
@1'OuX^
/* Z?xaXFm_
* (non-Javadoc) _+P*XY5
* 0 N7I:vJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~SBW`=aP}
*/ 9;XbyA]
public void sort(int[] data) { MVzj7~+
int[] temp=new int[data.length]; p_BG#dRM
mergeSort(data,temp,0,data.length-1); ^PFiO 12
} V C VqUCc
KO8vUR*2R
private void mergeSort(int[] data, int[] temp, int l, int r) { xib}E[-l#
int i, j, k; p'^}J$
int mid = (l + r) / 2; yB7si(,1>
if (l == r) =%I[o=6
return; U%r{{Q1
if ((mid - l) >= THRESHOLD) 2X' H^t]7
mergeSort(data, temp, l, mid); )MIw/
else HLz<C
insertSort(data, l, mid - l + 1); /Z*$k{qIR&
if ((r - mid) > THRESHOLD) L|APXy]>
mergeSort(data, temp, mid + 1, r); r)>'cjx/
else SE(<(w
insertSort(data, mid + 1, r - mid); *IbDA
Y<POdbg
for (i = l; i <= mid; i++) { z5({A2q
temp = data; +7OE,RoQ
} W:n\,P
for (j = 1; j <= r - mid; j++) { 4J,6cOuW4
temp[r - j + 1] = data[j + mid]; Mfz(%F|<
} o7+<sL
int a = temp[l]; bS:$VyH6
int b = temp[r]; jo"+_)]
for (i = l, j = r, k = l; k <= r; k++) { Ke@Bf
if (a < b) { ]b}3f<
data[k] = temp[i++]; < q(i(%
a = temp; yD3vq}U!
} else { 'p[6K'Uq5
data[k] = temp[j--]; l]DRJ
b = temp[j]; =>Ae]mi7
} Kc r)W
} h\#4[/
} C`Vuw|Xl
~hk!N!J\
/** QP<P,Bi~
* @param data rA<J^dX=C
* @param l :FSg%IUX
* @param i :W&klUU"
*/ GPAC0K^p
private void insertSort(int[] data, int start, int len) { vr47PM2al
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (.oDxs()I
} FLPN#1
} Th,]nVsGs~
} E.$//P n|1
} @:hWahMy
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堆排序： AS0(NlV
_kOuD}_|
package org.rut.util.algorithm.support; i-0AcN./p
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import org.rut.util.algorithm.SortUtil; <5]_u:
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/** UlN}SddI9
* @author treeroot /Y\q&}
* @since 2006-2-2 -{eiV0<^
* @version 1.0 -=rGN"(M _
*/ /s)It
public class HeapSort implements SortUtil.Sort{ 25, [<Ao
;ACeY
/* (non-Javadoc) {QK9pZB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k]& I(VQ"
*/ Obc,
public void sort(int[] data) { N]c:8dOj
MaxHeap h=new MaxHeap(); h;K9}w
h.init(data); :1iXBG\
for(int i=0;i h.remove(); <9=RLENmY"
System.arraycopy(h.queue,1,data,0,data.length); . VI #
} Jl"DMUy[kW
Tig6<t+Q
private static class MaxHeap{ ,,9vk\
%u|Qh/?7
void init(int[] data){ QIN# \
this.queue=new int[data.length+1]; Grd9yLF
for(int i=0;i queue[++size]=data; `n|k+tsC
fixUp(size); IfRrl/!nw
} %ULd_ES^
} "J >, Hr9
&:+_{nc,
private int size=0; Z.>?Dt
!})3Fb
private int[] queue; I$i1o#H
Pt;\]?LVrD
public int get() { mW_A3S5
return queue[1]; Q%GLT,f1.
} ^eYJ7&t
kr1^`>O5
public void remove() { d7c m?+
SortUtil.swap(queue,1,size--); Z[j-.,Qu
fixDown(1); )>=|oY3
} )^^}!U#|e
file://fixdown ~>$(5s2
private void fixDown(int k) { 10/3-)+
int j; !q PUQ+
while ((j = k << 1) <= size) { J_|>rfW
if (j < size %26amp;%26amp; queue[j] j++; wVs|mG"
if (queue[k]>queue[j]) file://不用交换 -gS/
break; ]}0+7Q
SortUtil.swap(queue,j,k); / dn]`Ge)
k = j; R91u6r#
} D3 E!jQ1
} 2gjA>ET`N
private void fixUp(int k) { 483vFLnF
while (k > 1) { QaEXk5>e
int j = k >> 1; KQqQ@D&n
if (queue[j]>queue[k]) tX}Fb0y
break; `+@%l*TQ
SortUtil.swap(queue,j,k); [c6_6q As
k = j; -3b0;L&4>x
} Ki@8
} ]7"mt2Q=3
Vk~}^;`Y
} G}~b
d{GXFT;0
} WI'csM;M#
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SortUtil： 4';['
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package org.rut.util.algorithm; DFjkp;`1
tbk9N( R
import org.rut.util.algorithm.support.BubbleSort; 8@Km@o]?
import org.rut.util.algorithm.support.HeapSort; J5rR?[i{
import org.rut.util.algorithm.support.ImprovedMergeSort; E3KPJ`=!*"
import org.rut.util.algorithm.support.ImprovedQuickSort; ,9M \`6
import org.rut.util.algorithm.support.InsertSort; `0 F"zu
import org.rut.util.algorithm.support.MergeSort; %BHq2~J
import org.rut.util.algorithm.support.QuickSort; h;unbz
import org.rut.util.algorithm.support.SelectionSort; CGg6nCB
import org.rut.util.algorithm.support.ShellSort; D{z=)'/F
qC|re!K
/** aA yFu_
* @author treeroot ->#7_W
* @since 2006-2-2 @o^sp|k !
* @version 1.0 Vgm{=$
*/ B'0Il"g'
public class SortUtil { ,>jm|BTD {
public final static int INSERT = 1; (}qLxZ/U
public final static int BUBBLE = 2; V[#lFl).
public final static int SELECTION = 3; Ul@'z|
public final static int SHELL = 4; $1@{Zz!S
public final static int QUICK = 5; Hm^p^,}_x
public final static int IMPROVED_QUICK = 6; {S&&X&A`v
public final static int MERGE = 7; *AN#D?X_
public final static int IMPROVED_MERGE = 8; |m EJJg`"7
public final static int HEAP = 9; %yrP: fg/
NAocmbfNz
public static void sort(int[] data) { QY fS-
sort(data, IMPROVED_QUICK); !c`1~a!
} jKQP0 t-
private static String[] name={ :{6[U=O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5Q'R5]?h
}; =UP)b9*h
4* hmeS"
private static Sort[] impl=new Sort[]{ _1JvA-
new InsertSort(), hg>YOf&RG
new BubbleSort(), ! O>mu6:Rf
new SelectionSort(), Yr,1##u
new ShellSort(), ^~I
new QuickSort(), &\K#UVDyhh
new ImprovedQuickSort(), Bms?`7}N
new MergeSort(), ,?f(~<Aj
new ImprovedMergeSort(), sR0nY8@F
new HeapSort() WL~`L!_. A
}; K=>/(sWiq
U5PCj ]-Xt
public static String toString(int algorithm){ 8UZEC-K
return name[algorithm-1]; Te/)[I'Tn
} Y+7v~/K=
Q'Tn+}B&
public static void sort(int[] data, int algorithm) { /][U$Q;Ke
impl[algorithm-1].sort(data); ljCgIfZ_4
} w/<hyEpxg
n#fg7d%
public static interface Sort { 0?sp
public void sort(int[] data); 8YJ({ Ou_
} Y#5S;?bR
]_,~q@r$
public static void swap(int[] data, int i, int j) { *]=)mM#
int temp = data; m ;vNA
data = data[j]; 5f5`7uVJF
data[j] = temp; s_8!x
} 3IxT2@H)
} ]7O?c=