[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; \M+MDT&
} 2>\b:
int i1=l; pNP_f:A|
int i2=mid+1; {d| |q<.-
for(int cur=l;cur<=r;cur++){ 7raSf&{&6b
if(i1==mid+1) ||R0U@F,
data[cur]=temp[i2++]; /rqqC(1
else if(i2>r) qpoquWZ
data[cur]=temp[i1++]; - o4@#p>>
else if(temp[i1] data[cur]=temp[i1++]; \^Ep>Pq`]
else 7 n\mj\
data[cur]=temp[i2++]; $2Kau 1
} iwvt%7
} PoJmW^:}
`tX@8|
} (RExV?:
Kl2}o|b
改进后的归并排序: #>BX/O*D
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package org.rut.util.algorithm.support; X2i*iW<
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import org.rut.util.algorithm.SortUtil; T0;u+$
FX7M4t#<
/** >J.Qm0TY(
* @author treeroot |Mt&p#y
* @since 2006-2-2 \xF;{}v
* @version 1.0 {z=j_;<]
*/ Ah*wQow
public class ImprovedMergeSort implements SortUtil.Sort { w %;hl#s
R_7 6W&
private static final int THRESHOLD = 10; S)+CTVVE
Z*h43
/* zkd3Z$Ce
* (non-Javadoc) C9o$9 l+B
* j]>=1Rd0b(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ky *DfQA
*/ 4ffU;6~l'
public void sort(int[] data) { ~xw5\Y^
int[] temp=new int[data.length]; n|6?J_{<b>
mergeSort(data,temp,0,data.length-1); 'm[6v}
} f?Z|>3.2
|P>|D+I0
private void mergeSort(int[] data, int[] temp, int l, int r) { U{"f.Z:Ydo
int i, j, k; %06vgjOa (
int mid = (l + r) / 2; c& 3#-DNI
if (l == r) <8f(eP\*F
return; NaF(\j
if ((mid - l) >= THRESHOLD) QGXQ{
mergeSort(data, temp, l, mid); o_sQQF
else y86))
insertSort(data, l, mid - l + 1); 0D<TF>M;pn
if ((r - mid) > THRESHOLD) V`by*s
mergeSort(data, temp, mid + 1, r); #XcU{5Qm5
else -/zp&*0gcx
insertSort(data, mid + 1, r - mid); <>]1Y$^Y
pL! a
for (i = l; i <= mid; i++) { O"\nR:\
temp = data; 7RD$=?oO'
} RE 9nU%!
for (j = 1; j <= r - mid; j++) { MA$Xv`6I\
temp[r - j + 1] = data[j + mid]; Gbn4*<N
} 3524m#4&@
int a = temp[l]; Qo.Uqz.C
int b = temp[r]; vGMJ^q
for (i = l, j = r, k = l; k <= r; k++) { _PV*lK=
if (a < b) { mW~P!7]
data[k] = temp[i++]; U_l7CCK +
a = temp; G,=F<TnI'
} else { Hng!'
data[k] = temp[j--]; 7D
b = temp[j]; #I;D
} 3?@?-q2g
} 7lR<@$q
} Ew]<jF|.#
c yP,[?N
/** H'Ln P>@n#
* @param data 8bt53ta
* @param l ;T>+,
* @param i ;gUXvx~~r
*/ x/xb1"
private void insertSort(int[] data, int start, int len) { srK53vKMHW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ` 5#hjLe
} ~p\n&{P0
} rGQ5l1</
} @;;G88=
} ]-:1se
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堆排序： vOe0}cR
=*O=E@]
package org.rut.util.algorithm.support; f TO+ZTRqf
Tm_8<$ 7
import org.rut.util.algorithm.SortUtil; =JW[pRI5a
AWT"Y4Ie
/** U<[jT=L
* @author treeroot Oc~aW3*A(
* @since 2006-2-2 H2U:@.o2&
* @version 1.0 3$_*N(e
*/ 7}%H2$Do
public class HeapSort implements SortUtil.Sort{ HxIoA
P6YQK+
/* (non-Javadoc) B?3juyB`--
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cIb4-TeV
*/ M|8 3HTJ
public void sort(int[] data) { W Y:s gG
MaxHeap h=new MaxHeap(); 6G}c1nWU
h.init(data); B.*"Xfr8
for(int i=0;i h.remove(); 1"YpO"Rh
System.arraycopy(h.queue,1,data,0,data.length); TBnvV 5_
} ;& |qSa'
'MN1A;IJ
private static class MaxHeap{ +/y]h0aa
A=X-;N#
void init(int[] data){ Xa,\EEmQ
this.queue=new int[data.length+1]; Kam]Mn'
for(int i=0;i queue[++size]=data; @5E,:)T*wR
fixUp(size); ^N-'xy
} #\ #3r
} 7"cv|6y|
H^ BYd%-
private int size=0; xA #H0?a]
k':s =IXW
private int[] queue; >f$NzJ}
9Ejyg*
public int get() { ]Ik%#l.G_
return queue[1]; uPLErO9Es[
} m$:&P|!'p
V!&P(YO:
public void remove() { ehT%s+aUw
SortUtil.swap(queue,1,size--); 6Dst;:
fixDown(1); r~>,$[|n})
} 'N6 S}w7
file://fixdown $r79n-
private void fixDown(int k) { /oL8;:m
int j; K5`Rk"s
while ((j = k << 1) <= size) { Jhy(x1%
if (j < size %26amp;%26amp; queue[j] j++; OipqoI2
if (queue[k]>queue[j]) file://不用交换 6(KmA-!b(O
break; URw5U1
SortUtil.swap(queue,j,k); $iPP|Rw
k = j; !h: Q
} eW50s`bKY
} <n^3uXzD
private void fixUp(int k) { .~mCXz<x
while (k > 1) { *7RvHHf
int j = k >> 1; CT*,<l-D
if (queue[j]>queue[k]) h}&b+1{X
break; ]tY:,Mfs
SortUtil.swap(queue,j,k); Cv^`&\[SW+
k = j; 6ep>hS4A&
} tsv$r$Se
} Lgi[u"Du
_~M^ uW^l
} wC` R>)
1mH\k5xu
} SlaDt
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SortUtil： c\.P/~
,.v7FM^gO
package org.rut.util.algorithm; 7bF*AYM
,}J_:\j
import org.rut.util.algorithm.support.BubbleSort; euQ.ArF
import org.rut.util.algorithm.support.HeapSort; ?WFh',`:
import org.rut.util.algorithm.support.ImprovedMergeSort; |vu>;*K
import org.rut.util.algorithm.support.ImprovedQuickSort; i9m*g*"2
import org.rut.util.algorithm.support.InsertSort; YI@Fhr &NU
import org.rut.util.algorithm.support.MergeSort; =SBBvnPLI
import org.rut.util.algorithm.support.QuickSort; yPgmg@G@/
import org.rut.util.algorithm.support.SelectionSort; ir[jCea,
import org.rut.util.algorithm.support.ShellSort; ,Z~;U
hfrnxeM#~
/** C@gXT]Q 0}
* @author treeroot qp~gP
* @since 2006-2-2 >/^#Drwb!i
* @version 1.0 UtJa3ya
*/ `78V%\
public class SortUtil { S$[k Q|Am
public final static int INSERT = 1; 0rE(p2
public final static int BUBBLE = 2; NlF}{
public final static int SELECTION = 3; 'q{733o
public final static int SHELL = 4; Vrp[r *V@E
public final static int QUICK = 5; 'C>U=cE7
public final static int IMPROVED_QUICK = 6; ^p=L\SJ
public final static int MERGE = 7; KQ`=t
public final static int IMPROVED_MERGE = 8; ||eAE)
public final static int HEAP = 9; M+xdHBg
R_kQPP
public static void sort(int[] data) { ,1UZv>}S
sort(data, IMPROVED_QUICK); Qa`hR
} ^b-18 ~s
private static String[] name={ m,_d^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %XTA;lrz
}; <@uOCRbV
la^ DjHA$
private static Sort[] impl=new Sort[]{ vkcRm`.
new InsertSort(), ]}PV"|#K{c
new BubbleSort(), H0*,8i5I
new SelectionSort(), @pza>^wk
new ShellSort(), N_DT7
new QuickSort(), z#Nl@NO&
new ImprovedQuickSort(), Fn|gVR
new MergeSort(), ]v29 Rx
new ImprovedMergeSort(), uTvv(f
new HeapSort() K_/B?h
}; SO?8%s(
m{%t?w$Au
public static String toString(int algorithm){ ;4#D,zlO^
return name[algorithm-1]; LE=k
} [QczlwmO
*"{&FEV
public static void sort(int[] data, int algorithm) { x?yD=Mq_
impl[algorithm-1].sort(data); XbXA+ey6
} ^TFs;|..
d- E4~)Qy
public static interface Sort { 9NpD!A&64<
public void sort(int[] data); F%/h*
} m7qqY
}5 9U}@xC
public static void swap(int[] data, int i, int j) { yL1bS|@
int temp = data; $u9]yiY.{
data = data[j]; s0W2?!>)
data[j] = temp; O#kq^C}
} =VP=|g
} 2+"r~#K*