[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; pBL,kqYNA>
} ^QpP'
int i1=l; 2h IM!wQ
int i2=mid+1; i,8h B(M!
for(int cur=l;cur<=r;cur++){ ;8'hvc3i$
if(i1==mid+1) B~D{p t3y
data[cur]=temp[i2++]; A Ns.`S
else if(i2>r) 4fT,/[k?
data[cur]=temp[i1++]; JLT10c3
else if(temp[i1] data[cur]=temp[i1++]; I ^?TabL
else Z[)t34EY"
data[cur]=temp[i2++]; $k,Z)2
} Ckj2$c~
} ~-.}]N+([
t:eZ`6o$T\
} I+rHb< P%
5@%$M$E
改进后的归并排序: MT[V1I{LV
IGV@tI
package org.rut.util.algorithm.support; ?w#V<3=
^vn8s~#
import org.rut.util.algorithm.SortUtil; yS[:C 2v
6y)TXp
/** 47|Lk]+O
* @author treeroot n;@PaE^8=
* @since 2006-2-2 s )POtJ<
* @version 1.0 +0{m(%i
*/ Qj.]I0d
public class ImprovedMergeSort implements SortUtil.Sort { MCZTeYnx
!g #
private static final int THRESHOLD = 10; jV2L;APCq
:1^ R$0d
/* LBq~?Q.e
* (non-Javadoc) 3k.{gAZKh
* )a AKO`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |]1-ck!
*/ ]P;uQ!
public void sort(int[] data) { i,r O3Jn
int[] temp=new int[data.length]; z#ab V1 Xi
mergeSort(data,temp,0,data.length-1); P"Lk(gY
} wzVx16Rvc
Jz&a9
private void mergeSort(int[] data, int[] temp, int l, int r) { Cc/h|4
int i, j, k; [=7=zV;}4
int mid = (l + r) / 2; 2BZYC5jy
if (l == r) PIR#M('
return; VG0Ty;bV
if ((mid - l) >= THRESHOLD) O-J;iX}
mergeSort(data, temp, l, mid); b`){f\#t
else K1>X%f^
insertSort(data, l, mid - l + 1); 5\gL+qM0
if ((r - mid) > THRESHOLD) GqMa|8j
mergeSort(data, temp, mid + 1, r); c7UmR?m
else VT8PV5z
insertSort(data, mid + 1, r - mid); ?oana%
gqV66xmJ3
for (i = l; i <= mid; i++) { *oopdGue
temp = data; ZUePHI-dP
} Q97F5ru6
for (j = 1; j <= r - mid; j++) { " !F)K
temp[r - j + 1] = data[j + mid]; 'n4Ro|kA
} 'w3BSaJi
int a = temp[l]; $0$'co"
int b = temp[r]; B~+3<#B
for (i = l, j = r, k = l; k <= r; k++) { +Z> Y//
if (a < b) { =r"-Pm{
data[k] = temp[i++]; &|yQwNA*a"
a = temp; *j5>2-C &
} else { TRP#b 7nC
data[k] = temp[j--]; q.0Evr:
b = temp[j]; !~Vo'ykwx'
} 4<}!+X7m
} > %h7)}U
} % `Q[?(z
}<R,)ZV^G
/** iO1ir+B\
* @param data ;;e\"%}@=q
* @param l \d"JYym
* @param i h1}U#XV
*/ R=&9M4
private void insertSort(int[] data, int start, int len) { p7et>;WRx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =1Nz* c
} lS@0 $
} MDV<[${
} ?YE'J~0A6
} -#<6
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堆排序： \9"
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package org.rut.util.algorithm.support; >QyJRMY
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import org.rut.util.algorithm.SortUtil; paKur%2u
0RHKzk6~c
/** `9;0Y
* @author treeroot ],`xd_=]=
* @since 2006-2-2 7egE."
* @version 1.0 aa|u*afWQ
*/ UWU(6J|Fk
public class HeapSort implements SortUtil.Sort{ q4u,pm,@
m=Mb'<
/* (non-Javadoc) (V&5EO8)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o>|&k]W/
*/ g)?Ol
public void sort(int[] data) { ba5,?FVI~
MaxHeap h=new MaxHeap(); o\/&05rp]
h.init(data); NOY`1i
for(int i=0;i h.remove(); k=]#)A(#C
System.arraycopy(h.queue,1,data,0,data.length); -M]B;[^
} $Lj~ge3#
~6{iQZa1Y
private static class MaxHeap{ Fl0(n #L
?'_Ty`vT
void init(int[] data){ Cws;6i*=@
this.queue=new int[data.length+1]; s!k7Wwj
for(int i=0;i queue[++size]=data; \r %y^G
fixUp(size); d]A.=NAc
} u<L<o2
} Sg%h}]~
JJ:pA_uX
private int size=0; SjosbdD
Vz.G!*>Dg
private int[] queue; _V2^0CZ
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public int get() { m:}PVJ-"
return queue[1]; m}UcF oaO
} [^Z)f<l
Xr:gm`[
public void remove() { u+/Uc:XK)
SortUtil.swap(queue,1,size--); {c :7:
fixDown(1); 6a*?m{
} J\@|c.ws
file://fixdown 'FNnFm
private void fixDown(int k) { $-D}y:
int j; Yg/g9$'
while ((j = k << 1) <= size) { (rmOv\hG9V
if (j < size %26amp;%26amp; queue[j] j++; }VU^ 8D
if (queue[k]>queue[j]) file://不用交换 C/$bgK[ev
break; s5bqS'%
SortUtil.swap(queue,j,k); 3_bE12
k = j; ZLjEH7
} X<%`
} K}t=Y
private void fixUp(int k) { agV z
while (k > 1) { RWg'W,v=!
int j = k >> 1; /^]/ iTg
if (queue[j]>queue[k]) Ux,?\Vd
break; sYEh>%mo^C
SortUtil.swap(queue,j,k); 8Y]% S9.
k = j; qX[{_$^Q
} Y/x>wNW
} pV8_i7\
nND; lVQSO
} Z~0TO-Q
`uKsFXM
} vjL +fH<0:
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SortUtil： _<E.?K$gbU
ZZ>"LH
package org.rut.util.algorithm; {|d28!8w
M(^_/1Z
import org.rut.util.algorithm.support.BubbleSort; 9 NGKh3V
import org.rut.util.algorithm.support.HeapSort; U{\9mt7b!
import org.rut.util.algorithm.support.ImprovedMergeSort; )/t&a$[
import org.rut.util.algorithm.support.ImprovedQuickSort; (*M*muk
import org.rut.util.algorithm.support.InsertSort; .5"s[(S
import org.rut.util.algorithm.support.MergeSort; .FN;3HU
import org.rut.util.algorithm.support.QuickSort; &SG5f[
import org.rut.util.algorithm.support.SelectionSort; >'lvZt
import org.rut.util.algorithm.support.ShellSort; xfF;u9$;
wBWqibY|
/** pCf9"LLer
* @author treeroot "ejsz&n
* @since 2006-2-2 )3 I~6ar
* @version 1.0 ?8w5tfN6t
*/ `h|Y0x
public class SortUtil { cP",szcY
public final static int INSERT = 1; Dm@h'*
public final static int BUBBLE = 2; Z0/$XS9|h;
public final static int SELECTION = 3; |KR8=-!7
public final static int SHELL = 4; fsl ZJE
public final static int QUICK = 5; ~.tl7wKkR/
public final static int IMPROVED_QUICK = 6; \.aKxj5
public final static int MERGE = 7; csd9[=HW/Q
public final static int IMPROVED_MERGE = 8; {Rdh4ZKh
public final static int HEAP = 9; =@nE:uto]
5DpvMhc_
public static void sort(int[] data) { !kG|BJ$j
sort(data, IMPROVED_QUICK); naro
} }S$OE))u
private static String[] name={ YV8PybThc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #bJp)&LO
}; .=)[S5.BVq
abAw#XQ8
private static Sort[] impl=new Sort[]{ RWRqu }a
new InsertSort(), 1V wcJd
new BubbleSort(), W ]$/qyc&J
new SelectionSort(), .Y|wG<E
new ShellSort(), n0LNAhM
new QuickSort(), h<Ct[46,S
new ImprovedQuickSort(), ? 'qyI^m@
new MergeSort(), v, CWE
new ImprovedMergeSort(), xk
new HeapSort() `W>Sss
}; TCFr-*x
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public static String toString(int algorithm){ \11+~
return name[algorithm-1]; f|=u{6
} {!j)j6(NY
L PS,\+
public static void sort(int[] data, int algorithm) { S&'?L0
impl[algorithm-1].sort(data); !PA><F
} d-C%R9
;[79Ewd#$
public static interface Sort { -dWg1`;
public void sort(int[] data); diNAT`|?#
} .p]rS =#
Dpwqg3,
public static void swap(int[] data, int i, int j) { #K`0b$
int temp = data; V%{WH}
data = data[j]; ek.@ 0c
data[j] = temp; rq^%)tR
} =k*XGbU
} mr2Mu