[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; 6>e YG<y{
} y&(R1Y75
int i1=l; mA" 82"
int i2=mid+1; .NX>d@ Kc
for(int cur=l;cur<=r;cur++){ 2E/yZ ~2s
if(i1==mid+1) 4+2hj*I
data[cur]=temp[i2++]; r$/.x6g//
else if(i2>r) gU%R9
data[cur]=temp[i1++]; WEZ)>[Xj?
else if(temp[i1] data[cur]=temp[i1++]; X)^&5;\`
else ;sZHE&+
data[cur]=temp[i2++]; 'i7!"Y6>
} KOP*\\1 J
} ?cmv;KV
;Y"*Z2U
} MoP,a9p
*p>1s!i
改进后的归并排序: 38HnW
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package org.rut.util.algorithm.support; W:XN!
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import org.rut.util.algorithm.SortUtil; bR&<vrMmrA
F3,djZq
/** dq U.2~9
* @author treeroot *JmU",X
* @since 2006-2-2 <Q%:c4N
* @version 1.0 ?[~)D}] j
*/ v>]^wH>/"
public class ImprovedMergeSort implements SortUtil.Sort { N \Wd0b
,Y_[+
private static final int THRESHOLD = 10; a"|\n_
O:86*
/* U<Z\jT[
* (non-Javadoc) HZ.Jc"+M
* V9r58hbVT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {I~[a#^
*/ ?ybX&V
public void sort(int[] data) { Pln*?o
int[] temp=new int[data.length]; jy2@t*
mergeSort(data,temp,0,data.length-1); B$kp\yL
} f8X/kz
4}t&AW4
private void mergeSort(int[] data, int[] temp, int l, int r) { v*.#LJEm
int i, j, k; DfL>fk
int mid = (l + r) / 2; AG==A&d>$
if (l == r) 4t;m^Iv
return; d;c<" +
if ((mid - l) >= THRESHOLD) kn1+lF@
mergeSort(data, temp, l, mid); A_\ZY0Xt
else SjRR8p<
insertSort(data, l, mid - l + 1); !&=%#i
if ((r - mid) > THRESHOLD) D8I)3cXa'
mergeSort(data, temp, mid + 1, r); zcTY"w\b
else :1JICxAU
insertSort(data, mid + 1, r - mid); .7EZB
&ivPY
for (i = l; i <= mid; i++) { }bxx]rDl
temp = data; `+go| 5N2
} Q8sCI An{
for (j = 1; j <= r - mid; j++) { %=O$@.%Zc
temp[r - j + 1] = data[j + mid]; HxmCKW!
} YvP u%=eF
int a = temp[l]; [ queXDn"m
int b = temp[r]; wcI4Y0+J
for (i = l, j = r, k = l; k <= r; k++) { Bhnwb0b<
if (a < b) { NXyuv7%5=
data[k] = temp[i++]; te b~KM
a = temp; ~jqh&u$(
} else { =*u:@T=d5
data[k] = temp[j--]; Gr a(DGX
b = temp[j]; VSI.c`=,
} al3[Ph5G
} nPj/C7j
} LpJ_HU7@lk
$*u{i4b
/** <Gr775"
* @param data }nW)+
* @param l c*"TmDY
* @param i s3LR6Z7;i
*/ J&IFn/JK$
private void insertSort(int[] data, int start, int len) { G3G"SJ np
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); aF'9&A;q
} fWBI}~e
} u+RdC;_
} K)`\u7Bu
} ;7]Q'N
u/h!i@_w[
堆排序： zFtwAa=r
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package org.rut.util.algorithm.support; vG<JOxP
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import org.rut.util.algorithm.SortUtil; sO!YM5v8
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/** rl,6ru
* @author treeroot :_qgpE<
* @since 2006-2-2 >Tm|}\qEb
* @version 1.0 AwKxt'()^
*/ t*? CD.S
public class HeapSort implements SortUtil.Sort{ 82X}@5o2
Bkn- OG
/* (non-Javadoc) S>]Jc$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cXJtNW@
*/ E&/D%}Wl
public void sort(int[] data) { hOX$|0i
MaxHeap h=new MaxHeap(); 1MV\ ^l_
h.init(data); [Q/')5b
for(int i=0;i h.remove(); U?6YY`A8
System.arraycopy(h.queue,1,data,0,data.length); gJVakR&
} p,=:Ff}~
"}bk *2
private static class MaxHeap{ $o"PQ!z
^;2dZgJ4^
void init(int[] data){ <N%8"o
this.queue=new int[data.length+1]; \Mv8pU
for(int i=0;i queue[++size]=data; ;n*N9-|.
fixUp(size); O/IW.t
} H>-?/H
} {V!Jj6n
=#i#IF42?
private int size=0; j${:Y$VmE
UC^Bn1
private int[] queue; nFl=D=50-
AcN~Q/xU
public int get() { {Y9m;b,X
return queue[1]; 6dh@DG*k
} #EpDIL
(WK$ )f
public void remove() { [UI4YZu}
SortUtil.swap(queue,1,size--); `he{"0U~S
fixDown(1); p;VqkSQ76
} -K`0`n}
file://fixdown qVFz-!6b
private void fixDown(int k) { |67j__XC
int j; U/M(4H3>H
while ((j = k << 1) <= size) { x7J|
if (j < size %26amp;%26amp; queue[j] j++; q4$R?q:^
if (queue[k]>queue[j]) file://不用交换 rG"}CX`]:
break; aW3yl}`{
SortUtil.swap(queue,j,k); Osb"$8im
k = j; R0fZ9_d7}
} fV3!x,H
} AAsl)
private void fixUp(int k) { H{x}gBQ
while (k > 1) { unmuY^+<
int j = k >> 1; n>\BPiz
if (queue[j]>queue[k]) YtNoYOB
break; AQ-P3`bCb
SortUtil.swap(queue,j,k); ij6ME6
k = j; Y.yM1 z
} (J): >\a]
} BNg\;2r
!&C8y
} oJ`ih&Q8
`"m"qUd
} gv;=Yhw.c
J%xp1/=2
SortUtil： .9WUp>
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package org.rut.util.algorithm; gtz!T2%
5/mW:G,&
import org.rut.util.algorithm.support.BubbleSort; "HVwm>qEi
import org.rut.util.algorithm.support.HeapSort; B[-%A!3 F
import org.rut.util.algorithm.support.ImprovedMergeSort; )F<<M+q=
import org.rut.util.algorithm.support.ImprovedQuickSort; g?(Z+w4A 3
import org.rut.util.algorithm.support.InsertSort; 5JI+42S \
import org.rut.util.algorithm.support.MergeSort; "8Pxf=
import org.rut.util.algorithm.support.QuickSort; `NV =2T
import org.rut.util.algorithm.support.SelectionSort; <P( K,L?r
import org.rut.util.algorithm.support.ShellSort; qo.~5
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/** h GS";g[?
* @author treeroot y]?%2ud/=
* @since 2006-2-2 9L?EhDcDV
* @version 1.0 <l5{!g
*/ &P!^k0NJR
public class SortUtil { p&_a kQj
public final static int INSERT = 1; 0(3t#
public final static int BUBBLE = 2; G4s!q1H
public final static int SELECTION = 3; *E.{i
public final static int SHELL = 4; (EUX>IJ
public final static int QUICK = 5; J mFzSR?}
public final static int IMPROVED_QUICK = 6; YFLWkdqAY
public final static int MERGE = 7; -MHu BgYJ-
public final static int IMPROVED_MERGE = 8; gSu+]N
public final static int HEAP = 9; .gT@_.ZD9
e\.|d<N?
public static void sort(int[] data) { pZGso
sort(data, IMPROVED_QUICK); 5cyl:1Ln
} .4F(Y_c
private static String[] name={ 7 m&M(ct
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" pWps-e
}; e7/J:n$
GG;M/}E9
private static Sort[] impl=new Sort[]{ .6$ST Ksr
new InsertSort(), u|8`=
new BubbleSort(), pa+^5N
new SelectionSort(), h+.^8fPR
new ShellSort(), V85a{OBm,8
new QuickSort(), tq@<8?
new ImprovedQuickSort(), LiQs;$V
new MergeSort(), IwFg1\>
new ImprovedMergeSort(), ,X\z#B
new HeapSort() J;"XRE[%5
}; gNs@Q!
1 EC0wX
public static String toString(int algorithm){ FL/y{;
return name[algorithm-1]; % C6 H(
} #)>>f
<2H0m
public static void sort(int[] data, int algorithm) { .,m$Cm
impl[algorithm-1].sort(data); IO>Cyo
} [ Q=)f
sTv/;*
public static interface Sort { 7\a(Imq
public void sort(int[] data); giaO7Qh~
} HE+VanY![
PU?kQZU~)
public static void swap(int[] data, int i, int j) { kHz3_B9[
int temp = data; iyH<!>a
data = data[j]; rIge6A>I
data[j] = temp; *i%!j/QDAP
} 348Bu7':
} do=VPqy