[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; ci NTYow
} l:Xf(TLa
int i1=l; OVo
int i2=mid+1; 7LZb*+>
for(int cur=l;cur<=r;cur++){ BNoCE!
if(i1==mid+1) |ij5c@~&
data[cur]=temp[i2++]; ?9okjLp1n
else if(i2>r) >,]e[/p
data[cur]=temp[i1++]; k@)m-K
else if(temp[i1] data[cur]=temp[i1++]; l \n:"*To
else Tvw2py q
data[cur]=temp[i2++]; wQuaB6E
} ]fS~N9B
} Py0i%pZ
*>*/|
} $ 5-2cL
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改进后的归并排序: ^^Q32XC,
v%~ViOgL\
package org.rut.util.algorithm.support; 4qcIoO
C^:&3,
import org.rut.util.algorithm.SortUtil; Nv]/L+i
uqeWdj*Y
/** 5)NfZN#&
* @author treeroot ;|1P1H-W~M
* @since 2006-2-2 >b](v)
* @version 1.0 ^52R`{
*/ a2_IF,p*?
public class ImprovedMergeSort implements SortUtil.Sort { Ijro;rsEKM
X1qj l_A
private static final int THRESHOLD = 10; :>ST)Y@]w
v86`\K*0Y
/* KCT"a:\
* (non-Javadoc) ):EXh#
* 0nnq/u^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -^Va]Lk
*/ \eN/fTPm
public void sort(int[] data) { ~'\u:Imuo
int[] temp=new int[data.length]; o*1`,n
mergeSort(data,temp,0,data.length-1); kakWXGeR
} p5t#d)
t^;Fq{>
private void mergeSort(int[] data, int[] temp, int l, int r) { ,IATJs$E
int i, j, k; ) hB*Hjh
int mid = (l + r) / 2; %,RU)}
if (l == r) 3_/d=ZI\
return; !Ve3:OZ.nO
if ((mid - l) >= THRESHOLD) P*sCrGO%
mergeSort(data, temp, l, mid); f#b[KB^Z,2
else " N4]e/.V
insertSort(data, l, mid - l + 1); }epN<DL
if ((r - mid) > THRESHOLD) +=$G6uR$
mergeSort(data, temp, mid + 1, r); 6* w;xf
else #JM*QVzv
insertSort(data, mid + 1, r - mid); Z`MQ+
x9=lN^/4
for (i = l; i <= mid; i++) { m`|Z1CT
temp = data; jL# akV
} Vswi /(
for (j = 1; j <= r - mid; j++) { R[(,wY_1
temp[r - j + 1] = data[j + mid]; &P;x<7h$t?
} SCo9[EJ
int a = temp[l]; K;95M^C\O*
int b = temp[r]; #[8gH>7
for (i = l, j = r, k = l; k <= r; k++) { d7&PbITN
if (a < b) { \yqiv"'
data[k] = temp[i++]; _C4^J
a = temp; OKP?^%kD
} else { YW5E |z
data[k] = temp[j--]; KhXW5hS1
b = temp[j]; e)cmZ8~S
} F'pD_d9]e
} @@SG0YxZ
} FIC 2)
He">kJx
/** 1G{$ B^ f
* @param data ZLE4XB]
* @param l rb`C:#j{J
* @param i *Z)`:Gae
*/ 5#QB&A>
private void insertSort(int[] data, int start, int len) { -_b}b)2iYN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .$99/2[90
} &S''fxGL
} 9R'rFI
} 89'nbg
} 0DS<(
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堆排序： xU67ztS'E'
I#uJdV|x
package org.rut.util.algorithm.support; N-_2d*l3
`P :-a7_
import org.rut.util.algorithm.SortUtil; l}:9)nXA{
b*?="%eE(
/** h+N75
* @author treeroot TyGXDU
* @since 2006-2-2 |`:Uww+3
* @version 1.0 XXxX;xz$
*/ 3YA !2
public class HeapSort implements SortUtil.Sort{ JMO"(?
P`V#Wj4\
/* (non-Javadoc) 2\EMtR>.M'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -kQ{~">w
*/ 9at7$Nq
public void sort(int[] data) { *K-,<hJ#L
MaxHeap h=new MaxHeap(); S\g8(\u
h.init(data); TxPP{6t
for(int i=0;i h.remove(); l3l[jDa,2
System.arraycopy(h.queue,1,data,0,data.length); w;>]L.n
} V`@@ufU}
fv<($[0
private static class MaxHeap{ p]=8=pE<
QJGRi
void init(int[] data){ NoDq4>
this.queue=new int[data.length+1]; -pa.-@
for(int i=0;i queue[++size]=data; @36^4E>h
fixUp(size); %"+FN2nbm
} `~pB1sS{
} F!^ Y!Y@H
2ORWdR.b
private int size=0; EUUj-.dEN
K& 2p<\2
private int[] queue; +z("'Cv
lKH"PH7*_w
public int get() { cnCUvD]'
return queue[1]; j!:U*}f
} %#ms`"H
fIWQ+E
public void remove() { ~iF*+\
SortUtil.swap(queue,1,size--); +apIp(E+
fixDown(1); *%uv7G@%N
} fB;'U
file://fixdown /i DS#l\0
private void fixDown(int k) { 988aF/c
int j; R!}B^DVt
while ((j = k << 1) <= size) { P{QRmEE
if (j < size %26amp;%26amp; queue[j] j++; Pgye{{
if (queue[k]>queue[j]) file://不用交换 pN4!*7M
break; ]p+t>'s
SortUtil.swap(queue,j,k); ^b>E_u
k = j; ?uQ|?rk
} bis/Nfr]
} ><`.(Z5c
private void fixUp(int k) { |W*f6F3
while (k > 1) { [>Q{70 c[
int j = k >> 1; glk I9~
if (queue[j]>queue[k]) Ldir'FW
break; 3^1)W!n/
SortUtil.swap(queue,j,k); \EB]J\x<
k = j; WMh'<'wN_
} w8FZXL
} ufEt"P-X.
zS?i@e $
} tGM)"u-
mn0QVkb}lc
} JBb}{fo~
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SortUtil： dVe3h.,[v
8Bhot,u'T
package org.rut.util.algorithm; Z][?'^`^!
@@ZcW<Y"
import org.rut.util.algorithm.support.BubbleSort; &[RC4^;\V
import org.rut.util.algorithm.support.HeapSort; ]V.9jlXF
import org.rut.util.algorithm.support.ImprovedMergeSort; nV']^3b
import org.rut.util.algorithm.support.ImprovedQuickSort; nW|[poQK
import org.rut.util.algorithm.support.InsertSort; 1Rp|*>
import org.rut.util.algorithm.support.MergeSort; ^D vaT9s
import org.rut.util.algorithm.support.QuickSort; ' P-K}Y
import org.rut.util.algorithm.support.SelectionSort; QW6k!ms$
import org.rut.util.algorithm.support.ShellSort; 8yztVdh
_DJ0MR~3
/** kAy.o
* @author treeroot ?{{E/J:%
* @since 2006-2-2 =WDf [?ED
* @version 1.0 @X\nY</E#M
*/ 8oA6'%.e
public class SortUtil { {MYlW0)~
public final static int INSERT = 1; vO4 &ZQ>6
public final static int BUBBLE = 2; 6;(Slkv
public final static int SELECTION = 3; )]qFI"B7
public final static int SHELL = 4; D0x+b2x^
public final static int QUICK = 5; ,LzS"lmmo
public final static int IMPROVED_QUICK = 6; ?pQ, 5+8
public final static int MERGE = 7; n,Ux>L
public final static int IMPROVED_MERGE = 8; <w2Nh eM 3
public final static int HEAP = 9; (!Ml2
w;#9 hW&
public static void sort(int[] data) { y8<,>
sort(data, IMPROVED_QUICK); {z.}u5N
} possM'vC
private static String[] name={ XUSfOf(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #Q$4EQB
}; K7_)!=DcX
T>?sPq
private static Sort[] impl=new Sort[]{ ff:&MsA|,
new InsertSort(), Q&F@[k
new BubbleSort(), >StvP=our
new SelectionSort(), =,0E3:X^
new ShellSort(), SH`"o
new QuickSort(), ZFdQZ=.'
new ImprovedQuickSort(), ?T4%"0
new MergeSort(), <!w-op2@ir
new ImprovedMergeSort(), *~:@xMa
new HeapSort() (U7%Z<
}; H=yD}!j
p>!r[v'
public static String toString(int algorithm){ &.4lhfI+(Q
return name[algorithm-1]; -<s?`Rnk
} 47icy-@kg
;V%lFP3#
public static void sort(int[] data, int algorithm) { ipbVQ7
impl[algorithm-1].sort(data); :*oI"U*f
} %@rh\Z
_;@kS<\N
public static interface Sort { K=B[MT#V{2
public void sort(int[] data); 2?}(
} H-rf?R2
FS@SC`~(
public static void swap(int[] data, int i, int j) { vb70~k
int temp = data; >w*"LZjTTK
data = data[j]; IO6i
data[j] = temp; R=9j+74U
} Jl9T[QAJn1
} zJx<]=]