[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; AJ2Xq*fk
} S+ymdZ)xZ`
int i1=l; HB{-^9{E
int i2=mid+1; |}^[f]
for(int cur=l;cur<=r;cur++){ 6R%c+ok8i
if(i1==mid+1) YH)Unql
data[cur]=temp[i2++]; I|RN/RVN
else if(i2>r) =}\]i*
data[cur]=temp[i1++]; jPPaL]
else if(temp[i1] data[cur]=temp[i1++]; |(}uagfrd
else XtT;UBE
data[cur]=temp[i2++]; Bh:AY@k
} j8?$Hk
} TUJ]u2J8?
W2|*:<Jt
} CWE jX-
(sS[F-2R7
改进后的归并排序: C@pDX>~2=b
-4,qAnuMx
package org.rut.util.algorithm.support; *D~@xypy
Id]WKL:
import org.rut.util.algorithm.SortUtil; E?y0UD[8J
NhCO C
/** _8\Uukm
* @author treeroot kOVx]=
* @since 2006-2-2 K).X=2gjY
* @version 1.0 tH5f;mY,
*/ \@pl:Os
public class ImprovedMergeSort implements SortUtil.Sort { [4kx59J3b
:|<D(YA
private static final int THRESHOLD = 10; |?s%8c'w=
*{Wh-bc
/* J4j?rLR3p
* (non-Javadoc) &w2.b:HF
* S#jH2fRo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1(w0*`
*/ ]WN{8
public void sort(int[] data) { o80pmy7@
int[] temp=new int[data.length]; x?:WR*5w
mergeSort(data,temp,0,data.length-1); g0rdF
} j!mI9*hP
3=t}py7M
private void mergeSort(int[] data, int[] temp, int l, int r) { 8czo#&
int i, j, k; `C=!8q
int mid = (l + r) / 2; dulW!&*No
if (l == r) $msT,$NJ
return; da\K>An>
if ((mid - l) >= THRESHOLD) s?~Abj_
mergeSort(data, temp, l, mid); 5zpk6FR$
else mt fDl;/D
insertSort(data, l, mid - l + 1); H\8i9RI
if ((r - mid) > THRESHOLD) +SPC@E_v
mergeSort(data, temp, mid + 1, r); -5p=gO
else G8QJM0VpS
insertSort(data, mid + 1, r - mid); XS9k&~)*
GJ%It.
for (i = l; i <= mid; i++) { RK'3b/T
temp = data; m oFK/5cJ
} 5PKv@Mk
for (j = 1; j <= r - mid; j++) { ?j8CkqX!
temp[r - j + 1] = data[j + mid]; 1Na CGD"
} '9auQ(2
int a = temp[l]; t@}<&{zk
int b = temp[r]; ~rpYZLH/:0
for (i = l, j = r, k = l; k <= r; k++) { XZd !c Ff
if (a < b) { F!pUfF,&
data[k] = temp[i++]; {zbH.V[
a = temp; WHbvb3'
} else { ?aSL'GI
data[k] = temp[j--]; Lrq+0dI 65
b = temp[j]; jt3s;U*
} MuZ\<;W$
} c1|o^eZ
} #A:I|Q1$g
xd(AUl4qY
/** k]R O=/ ?M
* @param data L4Nk+R;
* @param l zG [-n.
* @param i bn<&Xe
*/ T:;e73
private void insertSort(int[] data, int start, int len) { oVl:./(IB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z+wV(i97
} 1)u=&t,
} )/ s9ty
} r+m8#uR
} q n=6>wP
gjo\gP@
堆排序： @sfV hWG
bnD>/z]E
package org.rut.util.algorithm.support; bI]1!bi]i
Q=e?G300#L
import org.rut.util.algorithm.SortUtil; H@G7oK
O;H/15j:sK
/** T]CvfvO5
* @author treeroot @|-ydm0
* @since 2006-2-2 ^o,@9GTs
* @version 1.0 1O(fI|gcO
*/ }[AIE[
public class HeapSort implements SortUtil.Sort{ R0. `2=
Qx.E+n\
/* (non-Javadoc) pNQd\nY|0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ),M8W15
*/ JG/sKOlA
public void sort(int[] data) { <LBMth
MaxHeap h=new MaxHeap(); 50_%Tl[
h.init(data); c%xxsq2n
for(int i=0;i h.remove(); q".l:T%|C}
System.arraycopy(h.queue,1,data,0,data.length); (B$2)yZY
} e#_xDR:
Bct>EWQ
private static class MaxHeap{ L x9`y t6
)j6S<mn
void init(int[] data){ 5fVdtJk7
this.queue=new int[data.length+1]; ?:U6MjlQ"{
for(int i=0;i queue[++size]=data; 3c9v~5og4
fixUp(size); &2QN^)q
} rycscE4,
} uO"@YX/
i}HF
private int size=0; w'L;`k;Q
&X|z(vSJ$
private int[] queue; {jk {K6 }
[;|g2\
public int get() { pMX7Rl
return queue[1]; @&,r|-
} X-n'?=
m1+DeXR_g
public void remove() { W9eR3q
SortUtil.swap(queue,1,size--); !>>$'.nb@~
fixDown(1); L Q;JtLu1
} .'X$SF`
file://fixdown E"V|Plf c
private void fixDown(int k) { 4=q\CK2^A
int j; (/qY*?
while ((j = k << 1) <= size) { J3q}DDnEo
if (j < size %26amp;%26amp; queue[j] j++; o<C~67o_
if (queue[k]>queue[j]) file://不用交换 ]t#,{%h
break; ](T*f'LN
SortUtil.swap(queue,j,k); 2H]&3kM3X
k = j; B623B HwS
} OsC1('4@
} i ;X'1TN(y
private void fixUp(int k) { ,j5fzA
while (k > 1) { "h:xdaIE/p
int j = k >> 1; Nb B`6@r
if (queue[j]>queue[k]) Kx<bVK4"
break; 56TUh_
SortUtil.swap(queue,j,k); J+z0,N[
k = j; qPzgGbmD9
} *B3` #t
} ^[qmELW#7
@x{;a9y
} "]JS,g {m
*7-uQKp
} (_-zm)F7
z` gR*+
SortUtil： B3I< $
j\Q_NevV
package org.rut.util.algorithm; 3!*J;Y
o ue;$8
import org.rut.util.algorithm.support.BubbleSort; I.(/j
import org.rut.util.algorithm.support.HeapSort; CZbp}:|
import org.rut.util.algorithm.support.ImprovedMergeSort; :L\@+}{(c
import org.rut.util.algorithm.support.ImprovedQuickSort; bLf }U9
import org.rut.util.algorithm.support.InsertSort; ~~yo& ]
import org.rut.util.algorithm.support.MergeSort; vk[Km[(U'
import org.rut.util.algorithm.support.QuickSort; @$~%C) %u
import org.rut.util.algorithm.support.SelectionSort; jfgAI7;b
import org.rut.util.algorithm.support.ShellSort; $vc:u6I[
JsiJ=zo<
/** l&T;G9z
* @author treeroot n{UB^-}5
* @since 2006-2-2 8+GlM+>4
* @version 1.0 Pb[wysy
*/ ,T1t`
public class SortUtil { eqjl$QWPJS
public final static int INSERT = 1; r!#a.
public final static int BUBBLE = 2; L4Kkbt<x
public final static int SELECTION = 3; eOLS
public final static int SHELL = 4; nk6xavQji
public final static int QUICK = 5; [QL)6Xr
public final static int IMPROVED_QUICK = 6; vT[%*)`
public final static int MERGE = 7; D+"5R5J",
public final static int IMPROVED_MERGE = 8; /4=O^;
public final static int HEAP = 9; e'7!aysj
#M8"b]oh6
public static void sort(int[] data) { eR5swy&
sort(data, IMPROVED_QUICK); 2;6p2GNSh
} "CLd_H*)c
private static String[] name={ neOR/]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9Y-s],2V
}; Ym!Ia&n
vw+ @'+
private static Sort[] impl=new Sort[]{ nc l-VN
new InsertSort(), j7uiZU;3Rx
new BubbleSort(), c: #1Aym
new SelectionSort(), 9~u1fk{
new ShellSort(), BU])@~$
new QuickSort(), qFvtqv2
new ImprovedQuickSort(), rF 7EO%,
new MergeSort(), )!M:=}."
new ImprovedMergeSort(), }{9E~"_[
new HeapSort() LI(Wu6*Y
}; Yo:>m*31
uZW1 :cx
public static String toString(int algorithm){ H\)on"
return name[algorithm-1]; Ym0Xl(Se
} 6K*7%8Y/G
,=z8aiUu
public static void sort(int[] data, int algorithm) { mqtl0P0
impl[algorithm-1].sort(data); kS+*@o
} )2FS9h.t
g!aM-B^C
public static interface Sort { }R.cqk\qa^
public void sort(int[] data); :IS]|3wD
} )/f,.Z$
}4ta#T Ea
public static void swap(int[] data, int i, int j) { | F:?
int temp = data; ]36R_Dp
data = data[j]; TQbhK^]
data[j] = temp; &.Yh_
} U7 Z_
} +mV4Ty