[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; )\,hc$<=m
} d,%@*v]S
int i1=l; KS(Ms*k;'
int i2=mid+1; Zj2tQ}N
for(int cur=l;cur<=r;cur++){ QNCG^ub
if(i1==mid+1) _CXXgF[OCA
data[cur]=temp[i2++]; btIh%OM
else if(i2>r) =s[P =dU
data[cur]=temp[i1++]; {$^Lb4O[V
else if(temp[i1] data[cur]=temp[i1++]; /R)(u@jk
else p?eQN Y
data[cur]=temp[i2++]; HZzdelo
} ,Y2){8#l
} +0FmeM&`h_
Ov8{ny
} px.]m-
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改进后的归并排序: fO$~jxR.
cLCzLNyKl
package org.rut.util.algorithm.support; )z2hyGX
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import org.rut.util.algorithm.SortUtil; {t&+abY
p&,2@(Q
/** kR|(hA,$N
* @author treeroot z}*74lhF
* @since 2006-2-2 ;/<J&#2.
* @version 1.0 v0S7 ]?_
*/ ShRkL<
public class ImprovedMergeSort implements SortUtil.Sort { ];G$~[
z3p#`
private static final int THRESHOLD = 10; '8bT9
B=J/HiwV)
/* D1<$]r,
* (non-Javadoc) t"Djh^=y
* j 1#T]CDs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _gi?GQj
*/ -YP>mwSN?
public void sort(int[] data) { 9{V54ue;
int[] temp=new int[data.length]; JIyIQg'5i
mergeSort(data,temp,0,data.length-1); LuIs4&[EW
} \m;"KyP+
WL5!H.q
private void mergeSort(int[] data, int[] temp, int l, int r) { D^W?~7e^r
int i, j, k; I@9k+JB
int mid = (l + r) / 2; OM 5h>\9
if (l == r) haMt2S2_B:
return; za@`,Yq
if ((mid - l) >= THRESHOLD) {BKr/) H
mergeSort(data, temp, l, mid); rC!~4xj-
else XDi[Iyj
insertSort(data, l, mid - l + 1); $N1UEvC%Q
if ((r - mid) > THRESHOLD) f; 1C)
mergeSort(data, temp, mid + 1, r); kKg%[zXS
else g>*t"Rf:
insertSort(data, mid + 1, r - mid); e'Th[ wJ
O%(k$fvM
for (i = l; i <= mid; i++) { m]NyEMYg
temp = data; l+1GA0'JP
} |J#mgA}(
for (j = 1; j <= r - mid; j++) { d^.fB+)A3
temp[r - j + 1] = data[j + mid]; y-c2tF@'v
} &D 4Ci_6k
int a = temp[l]; _GK3]F0
int b = temp[r]; zn|/h,.
for (i = l, j = r, k = l; k <= r; k++) { @}cZxFQ!C
if (a < b) { `Dco!ih
data[k] = temp[i++]; mMEa*9P
a = temp; h^KLqPBt{
} else { 13nXvYo'
data[k] = temp[j--]; =K2mR}n\;
b = temp[j]; D*R49hja{
} tgbr/eCoU
} zbDM+;
} ' Z}/3 dp
Dj9).lgc
/** Zu/}TS9bi
* @param data ]}&f<X
* @param l $lMEZt8A
* @param i r%/*,lLO
*/ H]7;OM/g
private void insertSort(int[] data, int start, int len) { 3yfq*\_uXw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); a jCx"J
} ^#4?v^QNh
} ?#LbhO*
} 4F+n`{~
} DEw_dOJ(
kt;| $
堆排序： R)w|bpW
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package org.rut.util.algorithm.support; ]7, mo
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import org.rut.util.algorithm.SortUtil; 'B>%5'SdD
C +%&!Q
/** zU'\r~c
* @author treeroot &&;ol}W
* @since 2006-2-2 ]'F{uDm[
* @version 1.0 5Go&+|cvJ
*/ 'MHbXFM
public class HeapSort implements SortUtil.Sort{ ''f07R
L@|W&N;%a
/* (non-Javadoc) XKU+'Tz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qi\!<clv
*/ ^vjN$JB
public void sort(int[] data) { R;_U BQ)
MaxHeap h=new MaxHeap(); ,rp-`E5ap
h.init(data); ,HxsU,xiG
for(int i=0;i h.remove(); [~ sXjaL8
System.arraycopy(h.queue,1,data,0,data.length); lr[a~ca\
} DVNGV
#Pulbk8
private static class MaxHeap{ _Z|s!~wdz
@JWoF^U
void init(int[] data){ aNpeePF)z
this.queue=new int[data.length+1]; %7PprN0>
for(int i=0;i queue[++size]=data; wR?M2*ri
fixUp(size); -T4{PM
} bqXCe\#
} .3%eSbt0
o?f7_8fG
private int size=0; :4"SJ
HN\Zrb
private int[] queue; B8^tIq
Oph4&Ip[w
public int get() { C^S?W=1=w
return queue[1]; "-4V48ci
} ?gb"S,
x-0IxWD%
public void remove() { {_1^ GIIS
SortUtil.swap(queue,1,size--); #dDsI]E)
fixDown(1); AF1";duA
} PXcpROg56
file://fixdown 2,O-/A;tW*
private void fixDown(int k) { (XJehdB0
int j; 0Ng6Xg(QHc
while ((j = k << 1) <= size) { )^uLZMNaI
if (j < size %26amp;%26amp; queue[j] j++; p3:x\P<|
if (queue[k]>queue[j]) file://不用交换 QeA)@x.p
break; R0;c'W)
SortUtil.swap(queue,j,k); BBw`8!
k = j; >\K<q>*
} H*3f8A&@s
} `LnLd;Z
private void fixUp(int k) { ics
while (k > 1) { %*<k5#Yq
int j = k >> 1; _Kx /z
if (queue[j]>queue[k]) 6g!#"=ls;
break; N~ljU;wo-9
SortUtil.swap(queue,j,k); !&TbE@Xk
k = j; )$yqJ6y5
} #$%9XD3
} jK\2y|&&c
Ly\$?3h
} .G1NY1\
z-uJ+SA
} C^Tc9
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SortUtil： e%N\Pshgv
|!dyk<}oIu
package org.rut.util.algorithm; A$A7F=x
fu9y3`
import org.rut.util.algorithm.support.BubbleSort; zY(*Xk
import org.rut.util.algorithm.support.HeapSort; 8nQlmWpJ
import org.rut.util.algorithm.support.ImprovedMergeSort; P$2J`b[H$
import org.rut.util.algorithm.support.ImprovedQuickSort; JrseU6N
import org.rut.util.algorithm.support.InsertSort; C;wN>HE
import org.rut.util.algorithm.support.MergeSort; A) p}AEBc
import org.rut.util.algorithm.support.QuickSort; 'Y6{89y
import org.rut.util.algorithm.support.SelectionSort; J @"wJEF
import org.rut.util.algorithm.support.ShellSort; tQ'E"u1
):&A\nb
/** DyG3|5s1R
* @author treeroot Uk-^n~y
* @since 2006-2-2 V>@NkQ<|y
* @version 1.0 kJ>l,AD/
*/ %fh ,e5(LT
public class SortUtil { =9y'6|>l
public final static int INSERT = 1; 2#@S6zc
public final static int BUBBLE = 2; )& %X AW{
public final static int SELECTION = 3; [f.[C5f%"'
public final static int SHELL = 4; x+nrdW+
public final static int QUICK = 5; nWbe=z&y8[
public final static int IMPROVED_QUICK = 6; /`D]m?
public final static int MERGE = 7; TuBg4\V
public final static int IMPROVED_MERGE = 8; HV&N(;@
public final static int HEAP = 9; k x6%5%
R7e`Wn
public static void sort(int[] data) { DM!vB+j+,
sort(data, IMPROVED_QUICK); 9Q^>.^~^
} Ne@Iv)g?
private static String[] name={ zkI\ji
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kxhvy,t
}; "X>Z!>
,L\OhT
private static Sort[] impl=new Sort[]{ %D\TLY
new InsertSort(), /Y:_qsO1
new BubbleSort(), B y6:
new SelectionSort(), 9HRYk13ae
new ShellSort(), J@H9nw+Q
new QuickSort(), D._q'v<
new ImprovedQuickSort(), 8G1Tpn
new MergeSort(), K`j#'`/KC
new ImprovedMergeSort(), jbn{5af
new HeapSort() Ngu+V
}; engql;
QSAz:Yvf|
public static String toString(int algorithm){ G#Nh)ff
return name[algorithm-1]; . CLiv
} w%VHq z$
3kdTteyy+
public static void sort(int[] data, int algorithm) { @&S4j]rq
impl[algorithm-1].sort(data); r=s,Ath
} oA"t`,3
4NQS'*%D
public static interface Sort { E4HG`_cWb
public void sort(int[] data); u\ytiGO*
} _|wgw^.LJ]
JQ%e'
public static void swap(int[] data, int i, int j) { V(=~p[
int temp = data; N/8qd_:8
data = data[j]; 2 Nr j@q
data[j] = temp; Z%N{Y x(
} G!8O*4+A
} IpoZ6DB$