[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; p4>$z& _
} ]Hj<IvG
int i1=l; \/7i-B]G7
int i2=mid+1; oz'\q0
for(int cur=l;cur<=r;cur++){ Ey{%XR+*;
if(i1==mid+1) 1iT\df
data[cur]=temp[i2++]; k#TYKft
else if(i2>r) %WG9 dYdS
data[cur]=temp[i1++]; 31+;]W=
else if(temp[i1] data[cur]=temp[i1++]; aMARZ)V
else v;#=e$%}MO
data[cur]=temp[i2++]; {@}?k s5
} ?eV(1Fr@
} .V9e=yW!*
[//R~i?
} V+-$jOh
F,Xo|jjj
改进后的归并排序: Hk_y/97OO
nq}Q
package org.rut.util.algorithm.support; `7aDEzmJ
!;@_VWR
import org.rut.util.algorithm.SortUtil; 38V3o`f
tHD
/** `;,Pb&W~
* @author treeroot 6< J #^ 6
* @since 2006-2-2 YO{GU7
* @version 1.0 $v.C0 x
*/ 9_ICNG%
public class ImprovedMergeSort implements SortUtil.Sort { Thy=yz;p
$DFv30 f
private static final int THRESHOLD = 10; %,@vWmn
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/* wCs3:@UH
* (non-Javadoc) ~cAZB9Fa
* ub0zJTFJ#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @Fv=u
*/ ){s*n=KIO
public void sort(int[] data) { :Br5a34q
int[] temp=new int[data.length]; <O?y-$~
mergeSort(data,temp,0,data.length-1); ;cQW sTfT
} Ou>u%
.o%^'m"=D[
private void mergeSort(int[] data, int[] temp, int l, int r) { )o1eWL}
int i, j, k; Sydh2d
int mid = (l + r) / 2; ,7Y-k'7Kop
if (l == r) @4~=CV%j
return; Dq\ Jz~
if ((mid - l) >= THRESHOLD) J`M&{UP
mergeSort(data, temp, l, mid); |XYEn7^r
else JN/UUfj
insertSort(data, l, mid - l + 1); ?q`0ZuAg\<
if ((r - mid) > THRESHOLD) \2[<XG(^
mergeSort(data, temp, mid + 1, r); TG48%L
else m4K* <
insertSort(data, mid + 1, r - mid); "\"DCDKmG
Eu}b8c
for (i = l; i <= mid; i++) { 5/",<1
temp = data; 6[qA`x#
} pN6%&@) =
for (j = 1; j <= r - mid; j++) { x"kjs.d7[<
temp[r - j + 1] = data[j + mid]; J;t 7&Zpe
} v1U?&C
int a = temp[l]; )/ Ud^wi
int b = temp[r]; rr`;W}3
for (i = l, j = r, k = l; k <= r; k++) { d|9b~_::V
if (a < b) { { kSf{>Ia
data[k] = temp[i++]; rjt8fN
a = temp; ;?fS(Vz~
} else { MmPU7Nl%X
data[k] = temp[j--]; I-D^>\k+
b = temp[j]; 72W,FU~OD
} I7+9~5p
} ~8 H_u
} +1JH
FQ%c~N
/** @K223?c8l
* @param data [$(%dV6O
* @param l h-a!q7]l
* @param i rj]F87"
*/ PupM/?57
private void insertSort(int[] data, int start, int len) { !"Yj|Nu6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |!|^ v
} ! hd</_#
} Th[f9H%
} DF]9@{
} E"iUq
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堆排序： <>eOC9;VY
KT|RF
package org.rut.util.algorithm.support; mpC`Yk
}uHrto3M
import org.rut.util.algorithm.SortUtil; iF5'ygR-Z
c:S] R"
/** W+wA_s2&D
* @author treeroot 5V[oE\B
* @since 2006-2-2 ulT8lw='
* @version 1.0 WFR?fDtE
*/ ^VW PdH/Fe
public class HeapSort implements SortUtil.Sort{ UrlM%Jnq1
TlL^7f}
/* (non-Javadoc) 'AGto'Yy;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bUV >^d
*/ ,)+o
public void sort(int[] data) { _8fr6tO+
MaxHeap h=new MaxHeap(); )C(>H93
h.init(data); NqHy%'R
for(int i=0;i h.remove(); {_N,=DQ!
System.arraycopy(h.queue,1,data,0,data.length); vE6mOM!_L
} T#%/s?_>.
Sgim3):Z
private static class MaxHeap{ C`=p+2I]
r;9 r!$d
void init(int[] data){ 7*Qk`*Ii
this.queue=new int[data.length+1]; .LVQx
for(int i=0;i queue[++size]=data; Ng><n}
fixUp(size); h2z_,`iS7
} dG QG!l+>
} eg<bi@C1|
\}6;Kf}\
private int size=0; 3<=,1 cU
spU)]4P&
private int[] queue; 0tISXu-
bawJ$_O_
public int get() { "xcX'F^
return queue[1]; N#V.1<Y
} m^'uipa\
lN,/3\B
public void remove() { ~AYN
SortUtil.swap(queue,1,size--); sb:d>6
fixDown(1); ]3ONFa
} r`&-9"+
file://fixdown ?1L.:CS
private void fixDown(int k) { [=O/1T
int j; )}Q(Tl\$
while ((j = k << 1) <= size) { Gir#"5F
if (j < size %26amp;%26amp; queue[j] j++; ^Jb H?
if (queue[k]>queue[j]) file://不用交换 HS'Vi9
break; Er/bO
SortUtil.swap(queue,j,k); Ze<K=Q%(i
k = j; UT~a&u
} tqAd$:L
} s &Dg8$
private void fixUp(int k) { W{z.?$SH
while (k > 1) { G6VF>2
int j = k >> 1; &<zd.~N"
if (queue[j]>queue[k]) gh`m*@
break; `&0Wv0D0
SortUtil.swap(queue,j,k); G;> _<22
k = j; *"9><lJ-!
} 6cqP2!~
} w6`9fX6{h
5tQ1fJze
} aKU*j9A?;Z
Q 4CjA3
} #T`t79*N
8x`.26p
SortUtil： fQrhsuCrC
Ehzo05/!
package org.rut.util.algorithm; ntNI]~z&
bo.(zAz
import org.rut.util.algorithm.support.BubbleSort; =to=8H-
import org.rut.util.algorithm.support.HeapSort; N@B9 @8h
import org.rut.util.algorithm.support.ImprovedMergeSort; r"$.4@gc
import org.rut.util.algorithm.support.ImprovedQuickSort; .xf<=ep
import org.rut.util.algorithm.support.InsertSort; [c_|ob]
import org.rut.util.algorithm.support.MergeSort; E{6~oZ#L
import org.rut.util.algorithm.support.QuickSort; (}.@b|s
import org.rut.util.algorithm.support.SelectionSort; 2Q;9G6p
import org.rut.util.algorithm.support.ShellSort; V"cKJ;s
f7Ul(D:j\
/** q&C""!h^
* @author treeroot !4]9!<.k
* @since 2006-2-2 O1')nYF7
* @version 1.0 tx?dIy;
*/ CctJFcEZ
public class SortUtil { kw2T>
public final static int INSERT = 1; &A#~)i5gF
public final static int BUBBLE = 2; rD>*j~_+P
public final static int SELECTION = 3; G0E121`h
public final static int SHELL = 4; ,C3,TkA]
public final static int QUICK = 5; $mF_,|
public final static int IMPROVED_QUICK = 6; EpQ8a[<-3
public final static int MERGE = 7; `3p~m,
public final static int IMPROVED_MERGE = 8; c8Z wr]DF
public final static int HEAP = 9; vb9OonE2
1+?^0%AC
public static void sort(int[] data) { hsu{eyp
sort(data, IMPROVED_QUICK); fnx-s{c?
} fdONP>K[E
private static String[] name={ Dk48@`l2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .`?@%{
}; IK*07h/!
TLehdZ>^
private static Sort[] impl=new Sort[]{ @cU&n6C@
new InsertSort(), 8enEA^
new BubbleSort(), :[;hu}!&
new SelectionSort(), hY`\&@
new ShellSort(), ybp -$e
new QuickSort(), <w3!!+oK"
new ImprovedQuickSort(), Z"unF9`"1
new MergeSort(), g^zs,4pPU<
new ImprovedMergeSort(), r'gOVi4t1*
new HeapSort() {v3P9s(
}; yDNOtC|
HSq}7S&U
public static String toString(int algorithm){ A 7[:5$
return name[algorithm-1]; 'vNG(h#%d
} $1SUU F\.
TX
public static void sort(int[] data, int algorithm) { SwZA6R&
impl[algorithm-1].sort(data); e{Z &d
} EJ2yO@5O
<FZ@Q[RP
public static interface Sort { e}1uz3Rh
public void sort(int[] data); ^pHq66d%Z
} },|M9I0
H#ClIh?'b
public static void swap(int[] data, int i, int j) { #m={yck *
int temp = data; T0]MuIJ).
data = data[j]; _V`DWR *
data[j] = temp; JU&+c6>
} vm>b m
} (h:Rh