[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; A6p`ma $L
} {a"RXa
int i1=l; lhPGE_\
int i2=mid+1; P(ZQDTbM :
for(int cur=l;cur<=r;cur++){ (|u31[
if(i1==mid+1) :&yDqoQKJ
data[cur]=temp[i2++]; ^:cRp9l"7
else if(i2>r) -cfx2;68
data[cur]=temp[i1++]; FFzH!=7T?
else if(temp[i1] data[cur]=temp[i1++]; rC }}r!!
else w~+aW(2
data[cur]=temp[i2++]; M{KW@7j
} flnVYQe
} 8MF2K6
8cdsToF(e.
} (:sZ b?*
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改进后的归并排序: m#H_*L0
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package org.rut.util.algorithm.support; j _ ;fWBD:
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import org.rut.util.algorithm.SortUtil; tXq)nfGe{
!OE*z $\
/** IXq(jhm8bL
* @author treeroot CqoG.1jJS
* @since 2006-2-2 2\@Z5m3B
* @version 1.0 &/WAZs$2n
*/ _>_j\b
public class ImprovedMergeSort implements SortUtil.Sort { @ 4UxRp6+
QLr9dnA
private static final int THRESHOLD = 10; PT]GJ<K/
4hAJ!7[A.
/* w^;DG
* (non-Javadoc) o`?zF+M0
* Y(VO.fVJK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .eF_cD7v
*/ OO-k|\{|
public void sort(int[] data) { GozPvR^/
int[] temp=new int[data.length]; g22gIj]
mergeSort(data,temp,0,data.length-1); =mtY
} ' [p)N,
qL 5>o>J
private void mergeSort(int[] data, int[] temp, int l, int r) { oF|N O^H
int i, j, k; nWaNT-
int mid = (l + r) / 2; gH7z
if (l == r) APSgnf
return; b?VV'{4
if ((mid - l) >= THRESHOLD) Yl({)qK{
mergeSort(data, temp, l, mid); o"+ i&Wp~
else 1}g:|Q
insertSort(data, l, mid - l + 1); %SA!p;
if ((r - mid) > THRESHOLD) reiU%C
mergeSort(data, temp, mid + 1, r); -x]`DQUg
else 9-lEtl%
insertSort(data, mid + 1, r - mid); 0Y?H0
T>d.#
for (i = l; i <= mid; i++) { 1FERmf? ?d
temp = data; (! KG)!
} ;ojiJ?jU
for (j = 1; j <= r - mid; j++) { ]<trA$ 0
temp[r - j + 1] = data[j + mid]; ls|LCQPx
} 82:Wvp6
int a = temp[l]; x` /)g(
int b = temp[r]; "/+zMLY
for (i = l, j = r, k = l; k <= r; k++) { Qn+:/zA;
if (a < b) { b2)\ MNH
data[k] = temp[i++]; K1q+~4>\|
a = temp; <$i4?)f(
} else { <bUe/m
data[k] = temp[j--]; ,+1m`9}
b = temp[j]; X.#oEmA,P
} w{,4rk;Hr
} }31ZX
} &m'kI
MC!ZX)mF
/** UY>v"M
* @param data @,OT/egF4:
* @param l C"eXs#A
* @param i QMp rv*i
*/ ]r/^9XaqtA
private void insertSort(int[] data, int start, int len) { Pqp *
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w"zE_9I\
} =$^MQ\S0p
} !a-b6Aa
} fZN><3MO>
} E4oz|2!m
Z"v<0]rN
堆排序： C/@LZ OEL
I.jZ wW!r
package org.rut.util.algorithm.support; p{tK_ZBy]c
%s=Dj2+
import org.rut.util.algorithm.SortUtil; #I0pYA2m
jAhP> t:
/** 1{PG>W
* @author treeroot i*[n{=*l@
* @since 2006-2-2 l*}FXL
* @version 1.0 dt,3"J
*/ M]rO;^;6?
public class HeapSort implements SortUtil.Sort{ W`)<vGn=Y
t~p y=\
/* (non-Javadoc) 6 "gj!/e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k&6I f0i
*/ 2}WDw>V
public void sort(int[] data) { {ERMGd6Jp
MaxHeap h=new MaxHeap(); 1=)r@X/6d
h.init(data); 0Y+FRB]u
for(int i=0;i h.remove(); ${r[!0|
System.arraycopy(h.queue,1,data,0,data.length); /n{1o\
} `=)2<Ca;~@
r@}bDkx
private static class MaxHeap{ 9Sg<K)Mc
>hsuAU.UOR
void init(int[] data){ [~mGsXV
this.queue=new int[data.length+1]; =JO^XwUOo
for(int i=0;i queue[++size]=data; AR&:Q4r|
fixUp(size); +]wuJSxc
} q9*MNHg}
} <M+R\SH-
smy}3k
private int size=0; v;2CU
)b4$A:
private int[] queue; grom\
:1wrVU-?h
public int get() { >s EjR!
return queue[1]; ql{_%x?
} L8$1K&!
Ib`-pRU;
public void remove() { yi6N-7
SortUtil.swap(queue,1,size--); `wz[='yM
fixDown(1); pmc=NTr&<
} 3=.Y,ENM;
file://fixdown On_@HQ/FI
private void fixDown(int k) { 6ghx3_%w
int j; D]03eu
while ((j = k << 1) <= size) { 1=VJ&D;
if (j < size %26amp;%26amp; queue[j] j++; Z|m`7xeCy
if (queue[k]>queue[j]) file://不用交换 5Jk<xWKj
break; p.K*UP
SortUtil.swap(queue,j,k); *VeW?mY,P
k = j; <=um1P3X
} %&blJ6b
} I["j=r
private void fixUp(int k) { Qu\@Y[eia5
while (k > 1) { dJuD|9R
int j = k >> 1; JAb6zpP
if (queue[j]>queue[k]) hf<J \
break; QfpuZEUK
SortUtil.swap(queue,j,k); #2p#VQh
k = j; lFG9=Wf
} Y%`SHe7M
} 1T|$BK@)
Z*!O:/B
} JgfVRqm
&)9{HRP
} hlbvt-C?}"
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SortUtil： TpfZ>d2
Ty4S~ClO#'
package org.rut.util.algorithm; WCq /c6 D
.IrNa>J~
import org.rut.util.algorithm.support.BubbleSort; 4vZ4/#(x
import org.rut.util.algorithm.support.HeapSort; N3A<:%s
import org.rut.util.algorithm.support.ImprovedMergeSort; LEWhb!U
import org.rut.util.algorithm.support.ImprovedQuickSort; `#s#it'y
import org.rut.util.algorithm.support.InsertSort; ~W#sTrK
import org.rut.util.algorithm.support.MergeSort; Gwec4D
import org.rut.util.algorithm.support.QuickSort; @_ygnNn4R
import org.rut.util.algorithm.support.SelectionSort; ii|?;
import org.rut.util.algorithm.support.ShellSort; s95F#>dr
{,$rkwW
/** 4mYCSu14:`
* @author treeroot ?8V UOx
* @since 2006-2-2 s|yVAt|=
* @version 1.0 [a1jCo
*/ (c\hy53dP
public class SortUtil { ':h =*v8a
public final static int INSERT = 1; Rd&9E
public final static int BUBBLE = 2; kyYLP"oB=
public final static int SELECTION = 3; 8G^<[`.@j
public final static int SHELL = 4; 7{kP}?
public final static int QUICK = 5; ht97s
public final static int IMPROVED_QUICK = 6; %/9;ZV
public final static int MERGE = 7; R`'1t3p0i
public final static int IMPROVED_MERGE = 8; P7 yq^|
public final static int HEAP = 9; }(FPV*mS
}M>rE
public static void sort(int[] data) { S7iDTG_@t
sort(data, IMPROVED_QUICK); /%rq hHs
} \1%l^dE@
private static String[] name={ vv0Q$ O->
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,I.WX,OR
}; VRng=,
-%c<IX>z9
private static Sort[] impl=new Sort[]{ 6cS>bl
new InsertSort(), X*eW#|$\
new BubbleSort(), w|Cx>8P8@
new SelectionSort(), uBnoQ~Qd[z
new ShellSort(), K!z`
new QuickSort(), kQ>^->w
new ImprovedQuickSort(), w!^~<{Kz
new MergeSort(), G7LIdn=
new ImprovedMergeSort(), Q\Kx"Y3i
new HeapSort() Td\o9
}; O'*@ Ytn
afEF]i
public static String toString(int algorithm){ 0$.m_0H
return name[algorithm-1]; |Bo .4lX
} _s.;eHp,
\[:/CxP
public static void sort(int[] data, int algorithm) { Z?NW1m()F
impl[algorithm-1].sort(data); AasZuO_I
} `RRE(SiKU
El2e~l9
public static interface Sort { M" lg%j
public void sort(int[] data); 3.Gj4/f
} /s:fW+C
bJ /5|E?
public static void swap(int[] data, int i, int j) { _D7]-3uC!
int temp = data; &K+0xnUH
data = data[j]; |`d0^(X
data[j] = temp; A Io|TD5{~
} Q%S9fq,q
} jvy$t$az