[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; ^lt2,x
} 9!(%Vf>
int i1=l; &bz% @p;
int i2=mid+1; AH:uG#
for(int cur=l;cur<=r;cur++){ df$.gP
if(i1==mid+1) `g3AM%3
data[cur]=temp[i2++]; !Ve0:$
else if(i2>r) q&J5(9]O|L
data[cur]=temp[i1++]; FR[I~unqD
else if(temp[i1] data[cur]=temp[i1++]; 3>^]r jFw
else i@.Tv.NZ
data[cur]=temp[i2++]; ,dR.Sacv
} 0FtwDM))
} a#"orc j
icIn>i<m
} JRw,${W
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改进后的归并排序: ||>4XDV#
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package org.rut.util.algorithm.support; Yj1|]i5b
VC/-5'_6
import org.rut.util.algorithm.SortUtil; JPAjOcmU/
@B(oq1i@
/** tp}/>gU!
* @author treeroot P%lD9<jED
* @since 2006-2-2 Fz';H
* @version 1.0 $] "M`h
*/ o+&Om~W
public class ImprovedMergeSort implements SortUtil.Sort { lUB?eQuN_
On}1&!{1]
private static final int THRESHOLD = 10; Ba8=nGa4KY
%L*EB;nK
/* l;0([_>*j
* (non-Javadoc) #i@f%Bq-
* OU/}cu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S xJ&5q
*/ !(F?`([A
public void sort(int[] data) { A6]X aF
int[] temp=new int[data.length]; M%`CzCL u
mergeSort(data,temp,0,data.length-1); i,r:R g~
} cVW7I
TPJF?.le '
private void mergeSort(int[] data, int[] temp, int l, int r) { .)b<cH~%
int i, j, k; h8asj0
int mid = (l + r) / 2; yy8-t2V
if (l == r) +FqD.=8
return; @d0f+9d
if ((mid - l) >= THRESHOLD) ih".y3
mergeSort(data, temp, l, mid); KhfADqji|
else XQ}J4J~Vm
insertSort(data, l, mid - l + 1); i`2SebDj'w
if ((r - mid) > THRESHOLD) ")Not$8
mergeSort(data, temp, mid + 1, r); B1)Eo2i#
else g=$U&Hgs
insertSort(data, mid + 1, r - mid); BA:x*(%~
)~wKRyQff
for (i = l; i <= mid; i++) { -i:WA^yKgw
temp = data; z qq
} lf7bx}P*
for (j = 1; j <= r - mid; j++) { bwXeEA@{
temp[r - j + 1] = data[j + mid]; RH;ulAD6(~
} %m |I=P
int a = temp[l]; ML905n u
int b = temp[r]; a{T.U-0
for (i = l, j = r, k = l; k <= r; k++) { ~gd#cL%
if (a < b) { am]M2+,2Ip
data[k] = temp[i++]; D8wf`RUt
a = temp; jG[Vp b
} else { HJAiQ[m5s
data[k] = temp[j--]; `xBoNQai
b = temp[j]; tdH[e0x B
} Wn=sF,c
} MT&aH~YB
} `HRL .uX
~-zTY&c_
/** fwz:k]vk
* @param data cb9-~*1
* @param l 754MQK|g
* @param i e3;&
*/ }i~k:kmV
private void insertSort(int[] data, int start, int len) { $os]$5(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {1Ra|,;
} h~k<"
} Gw<D'b)!
} 27D*FItc
} {}YA7M:L
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堆排序： MV"n{1B
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package org.rut.util.algorithm.support; epiviCYC
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import org.rut.util.algorithm.SortUtil; $NVVurXa
1VgGF^cYR
/** zzf@U&x<
* @author treeroot {cs>Sy 4
* @since 2006-2-2 q%4X1 W
* @version 1.0 jKml:)k
*/ 0zH-g
public class HeapSort implements SortUtil.Sort{ Ku,wI86
dC({B3#e{
/* (non-Javadoc) |E1U$,s~u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C1D:Xi-
*/ K ";Et
public void sort(int[] data) { n2mO-ZXud
MaxHeap h=new MaxHeap(); >_2~uF@pb
h.init(data); bh.&vp.kP
for(int i=0;i h.remove(); /2Wg=&H
System.arraycopy(h.queue,1,data,0,data.length); x:FZEyalG
} 8 MO-QO
&gp&i?%X9b
private static class MaxHeap{ PMytk`<`zw
Ar!0GwE+
void init(int[] data){ ,4Q4{Tx
this.queue=new int[data.length+1]; ?62Im^1/
for(int i=0;i queue[++size]=data; ^{uHph9ny
fixUp(size); @U_CnhPQq
} v#Rh:#7O%U
} l5T[6C
3>h2W
private int size=0; JVIFpN"`
C+TB>~Gv`
private int[] queue; iO$87!
EHC7b^|3}
public int get() { |SOLC
return queue[1]; _qa]T'8
} 8ao-]QoMZ
_Tj&gyS
public void remove() { -P}A26qB
SortUtil.swap(queue,1,size--); FoetP`
fixDown(1); >/A]C$?3
} S9Sgd&a9
file://fixdown U823q-x
private void fixDown(int k) { +4:eb)e
int j; 4 . 7X*1
while ((j = k << 1) <= size) { M{L- V
if (j < size %26amp;%26amp; queue[j] j++; 7FE36Ub9
if (queue[k]>queue[j]) file://不用交换 N (4H}2
break; TaRPMKk
SortUtil.swap(queue,j,k); a^%)6E.[,
k = j; J1G}l5N
} J9[7AiEd(/
} pT|s#-}
private void fixUp(int k) { GTR*3,rw
while (k > 1) { gF,=rT1:>r
int j = k >> 1; B@(d5i{h
if (queue[j]>queue[k]) I;w!
break; 'W(u.
SortUtil.swap(queue,j,k); 4gen,^Ij
k = j; F1.Xk1y%
} U 3< 3T
} j,.M!q]
DC h !Z{I
} 6Hnez@d
.Exvuo`F
} #%[;vK
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SortUtil： 23tX"e
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package org.rut.util.algorithm; qKD
m#UQ,EM
import org.rut.util.algorithm.support.BubbleSort; A1prYD
import org.rut.util.algorithm.support.HeapSort; 4J5zSTw
import org.rut.util.algorithm.support.ImprovedMergeSort; f0H.$UAL
import org.rut.util.algorithm.support.ImprovedQuickSort; vQ}ZfP
import org.rut.util.algorithm.support.InsertSort; ?SNacN@r
import org.rut.util.algorithm.support.MergeSort; qHub+"2
import org.rut.util.algorithm.support.QuickSort; M*0^<e~]F
import org.rut.util.algorithm.support.SelectionSort; U\P4ts
import org.rut.util.algorithm.support.ShellSort; |N`0G.#
b,^ "-r
/** WJD2(el
* @author treeroot ?(gha
* @since 2006-2-2 + Tp% *
* @version 1.0 @MOQk
*/ |aP`hVm
public class SortUtil { 684& H8
public final static int INSERT = 1; 3*<@PXpK&
public final static int BUBBLE = 2; ,cNe-KJk
public final static int SELECTION = 3; 3WP\MM
public final static int SHELL = 4; 8r(awp
public final static int QUICK = 5; ``CM7|)>`
public final static int IMPROVED_QUICK = 6; Da 7(jA+
public final static int MERGE = 7; 5a/A?9?,
public final static int IMPROVED_MERGE = 8; th73eC'
public final static int HEAP = 9; a(vt"MQ_
#ZCgpg$wM
public static void sort(int[] data) { <C+:hsS=
sort(data, IMPROVED_QUICK); ~bigaY
} QMy;?,
private static String[] name={ "LaNXZ9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &5(|a"5+G
}; PLFM[t/
L(`^T`
private static Sort[] impl=new Sort[]{ : 60PO
new InsertSort(), p|(910OEQ
new BubbleSort(), Arir=q^2
new SelectionSort(), =ub&@~E
new ShellSort(), U6jlv3
new QuickSort(), o$d; Y2K
new ImprovedQuickSort(), "SLN8x49(
new MergeSort(), U+@yx>!
new ImprovedMergeSort(), XLqS{r~?
new HeapSort() MukPY2[Am
}; w,eYrxR|N
H!Uy4L~>
public static String toString(int algorithm){ v :6`(5
return name[algorithm-1]; *r:8=^C7S
} bxkp9o
T-fW[][&$
public static void sort(int[] data, int algorithm) { n@T4z.*~lA
impl[algorithm-1].sort(data); fhMtnh:
} {* >$aI
+wD--24!(
public static interface Sort { yHr/i) c
public void sort(int[] data); B*Hp
} oF]0o`U&a
#4%,09+
public static void swap(int[] data, int i, int j) { UgSSZ05Lq
int temp = data; H&mw!=FV0
data = data[j]; eW\7X%I
data[j] = temp; xzW]D0o0
} 5y}}?6n+
} OPwp(b