[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; R_@yj]%H=
} 4qyL' \d[
int i1=l; @9vz%1B<l
int i2=mid+1; 2^UFP+Yw
for(int cur=l;cur<=r;cur++){ ]^Q`CiKd
if(i1==mid+1) x5PQ9Bw,
data[cur]=temp[i2++]; _|6{(
else if(i2>r) w,`x(!&
data[cur]=temp[i1++]; j/^0q90QO
else if(temp[i1] data[cur]=temp[i1++]; p(Qm\g<
else S4?ssI
data[cur]=temp[i2++]; ND21;
} w #1l)+
} 25YJH1x
vV=$N"bT~
} AE7>jkHB
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改进后的归并排序: >mt<`s
eU{=x$o6S
package org.rut.util.algorithm.support; MWhFNfS8=
3s>&h-E
import org.rut.util.algorithm.SortUtil; r."Dc
F*I{?NRN1
/** xQJdt$]U@
* @author treeroot 26\1tOj Np
* @since 2006-2-2 Q*KEODR8\
* @version 1.0 VK?,8Y
*/ ,GR(y^S
public class ImprovedMergeSort implements SortUtil.Sort { C=hE@
M:C*?;K:
private static final int THRESHOLD = 10; @p`#y
[ 8v)\lu
/* >#0yd7BST
* (non-Javadoc) /"/$1F%{
* Sf*VkH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,VHvQU
*/ y4shW|>5_
public void sort(int[] data) { %AW
int[] temp=new int[data.length]; ^PWZ1.T
mergeSort(data,temp,0,data.length-1); wF38c]r`\<
} &:{|nDT_2
9"<)DS
private void mergeSort(int[] data, int[] temp, int l, int r) { a(BC(^1!
int i, j, k; U'lrdc"Q
int mid = (l + r) / 2; wetkmd
if (l == r) j4brDlo?@
return; l"ih+%S
if ((mid - l) >= THRESHOLD) teM&[U
mergeSort(data, temp, l, mid); 0BVMLRB
else 5IMh$!/uc
insertSort(data, l, mid - l + 1); YHeB<v
if ((r - mid) > THRESHOLD) Jnv91*>h8
mergeSort(data, temp, mid + 1, r); S!g&&RDx
else <y`yKXzBUV
insertSort(data, mid + 1, r - mid); T8qG9)~3
Q7#Q6-Q
for (i = l; i <= mid; i++) { Ui1K66{
temp = data; -{P)\5.L
} TWxMexiW
for (j = 1; j <= r - mid; j++) { ,P9B8oIq
temp[r - j + 1] = data[j + mid]; !})+WSs'"s
} \ &_ -
int a = temp[l]; }b,a*4pN
int b = temp[r]; >xH3*0Lp
for (i = l, j = r, k = l; k <= r; k++) { !^\|r<2M
if (a < b) { 0>.'w\,87B
data[k] = temp[i++]; )EcF[aO
a = temp; $'[( DwLS
} else { kv5D=0r
data[k] = temp[j--]; $RF"m"
b = temp[j]; L!e@T'
} 78NAcP~6c
} "w_(p|cm=
} TJO|{Lxm
u`
/** v8wN2[fC
* @param data d5WE^H)E.
* @param l sY1*WolA
* @param i ,~G[\2~p
*/ uswz@ [pa
private void insertSort(int[] data, int start, int len) { lkl#AH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,cbP yg
} 1lx\Pz@ol
} _ k>j?j-
} /?by4v73P
} A 7TP1
9`vse>,-hg
堆排序： 2@A7i<p
;N4mR6
package org.rut.util.algorithm.support; wV(_=LF
n}._Nb 5
import org.rut.util.algorithm.SortUtil; (r7~ccy4
V#sANi?mpo
/** +/UInAM
* @author treeroot Ya,>E@oc
* @since 2006-2-2 4V[+6EV
* @version 1.0 sb8SG_c.
*/ Zi|'lHr
public class HeapSort implements SortUtil.Sort{ H)(Jjk-O
%Cm4a49FNi
/* (non-Javadoc) L-=^GNh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '3<YZWS
*/ i44KTC"sB
public void sort(int[] data) { _s=[z$EN&
MaxHeap h=new MaxHeap(); iF`E>%#
h.init(data); 'RG`DzuF
for(int i=0;i h.remove(); 0eb`9yM
System.arraycopy(h.queue,1,data,0,data.length); >0~y"~M
} tb_}w@:kU
6%:'2;xM
private static class MaxHeap{ Ou,B3kuQ+
&Cdd
void init(int[] data){ 67f#Z&r2k
this.queue=new int[data.length+1]; Ho\z^w+T`
for(int i=0;i queue[++size]=data; O0~[]3Y[=
fixUp(size); =I*"vwc?
} _<5> E
} ^mG-O
2#|Q=rWB
private int size=0; LR`/pet
beO*|
private int[] queue; I-+D+DhRx
WxIP~
public int get() { P:CwC"z>sS
return queue[1]; L18Olu
} McA,
@n})oAC,
public void remove() { d)q{s(<;
SortUtil.swap(queue,1,size--); b}k`'++2,
fixDown(1); T\2cAW5
} @dO~0dF
file://fixdown Na[bCt
private void fixDown(int k) { "esV#%:#J
int j; iUSs)[]H>
while ((j = k << 1) <= size) { *UEo&B2+
if (j < size %26amp;%26amp; queue[j] j++; hX[hR
if (queue[k]>queue[j]) file://不用交换 :a`l_RMU
break; YMm Fpy
SortUtil.swap(queue,j,k); =FdS'<GM
k = j; S* <:He&1
} oBIKtS*L
} !&! sn"yD
private void fixUp(int k) { (8{h I
while (k > 1) { t'7)aJMP
int j = k >> 1; ="Dmfy7
if (queue[j]>queue[k]) o3%+FWrVTS
break; Fet>KacTht
SortUtil.swap(queue,j,k); o2Z# 5-
k = j; H?O*
} X;zy1ZH
} 6``!DMDt/P
Soq 'B?>
} oSTGs@EK
UJlKw `4
} C+2*m=r
O(wt[AEA
SortUtil： .!=2#<
wVw3YIN#
package org.rut.util.algorithm; v')T^b F@
~ dmyS?Or
import org.rut.util.algorithm.support.BubbleSort; o- GHAQ
import org.rut.util.algorithm.support.HeapSort; &e2") 4oh
import org.rut.util.algorithm.support.ImprovedMergeSort; 1oodw!hW
import org.rut.util.algorithm.support.ImprovedQuickSort; _H@S(!
import org.rut.util.algorithm.support.InsertSort; uvZ|6cM
import org.rut.util.algorithm.support.MergeSort; "EhA _ =i
import org.rut.util.algorithm.support.QuickSort; 6XB9]it6
import org.rut.util.algorithm.support.SelectionSort; "EHwv2Hm>
import org.rut.util.algorithm.support.ShellSort; Pm V:J9
{6v+ Dz>
/** !a4pKN`qLY
* @author treeroot S,qsCnz
* @since 2006-2-2 _[IN9ZC2G
* @version 1.0 6?(*:}Q
*/ }&EPH}V2n
public class SortUtil { CA:t](xqQ
public final static int INSERT = 1; }6ec2I%`o
public final static int BUBBLE = 2; keCM}V`?"
public final static int SELECTION = 3; J`V7FlM
public final static int SHELL = 4; \$GlB+ iCx
public final static int QUICK = 5; vvdC.4O
public final static int IMPROVED_QUICK = 6; W aks*^|
public final static int MERGE = 7; :'a |cjq
public final static int IMPROVED_MERGE = 8; >L5[dkg%
public final static int HEAP = 9; z l@ <X0q
{n2jAR9nq
public static void sort(int[] data) { |)yO]pB:
sort(data, IMPROVED_QUICK); ;/ WtO2
} >`\~=ivrD
private static String[] name={ 62a{Ggs{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" iv:[]o
}; B-'Xk{
(t fADaJM
private static Sort[] impl=new Sort[]{ -=2tKH`Q
new InsertSort(), 0zdH6&
new BubbleSort(), |a/"7B|?\
new SelectionSort(), +qDudGI
new ShellSort(), jSpmE
new QuickSort(), s$|GVv1B
new ImprovedQuickSort(), m03;'Nj'7#
new MergeSort(), Y|>y]x
new ImprovedMergeSort(), :J}L| `U9
new HeapSort() D+#QQH
}; #k5Nnv#(J
w}YO+
public static String toString(int algorithm){ O-5H7Kd-
return name[algorithm-1]; ~S#Le
} )Q&:$]
0P&rTtU6
public static void sort(int[] data, int algorithm) { Z[Uz~W6M]
impl[algorithm-1].sort(data); 0ir]
} ^JJ*pT:
Ftu4 V*lD
public static interface Sort { *8t_$<'dQ
public void sort(int[] data); 0x[v)k9"0
} Rw=gg>\
fg^$F9@
public static void swap(int[] data, int i, int j) { ~Wf&$p<|
int temp = data; VuPa'2
data = data[j]; 34&n{ xv
data[j] = temp; +{4ziqYj
} $5s?m\!jZz
} pma'C\b>