[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; 4]xD-sc
} tU>7jo[-p
int i1=l; [3x*47o"z
int i2=mid+1; =t|,6Vp
for(int cur=l;cur<=r;cur++){ j|[>f
if(i1==mid+1) QVl"l'e8
data[cur]=temp[i2++]; LF+E5{=:R
else if(i2>r) oTTE<Ct[
data[cur]=temp[i1++]; dMI G2log
else if(temp[i1] data[cur]=temp[i1++]; n9Vr*RKM)
else Pv*]AF;9pQ
data[cur]=temp[i2++]; ]v+yeGIKS
} ke2M&TV
} P\@efq@!
@R`Ao9n9V
} 8}Q2!,9Q
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改进后的归并排序: c&PaJm
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package org.rut.util.algorithm.support; &WS'Me
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import org.rut.util.algorithm.SortUtil; Sb}=j;F
o76{;Bl\O
/** Qn;,OBk
* @author treeroot (Dx p
* @since 2006-2-2 vLGnLpt
* @version 1.0 F><ficT
*/ &@w0c>Y
public class ImprovedMergeSort implements SortUtil.Sort { gIKQip<
WM ]eb, 8q
private static final int THRESHOLD = 10; .kB!',v\
C>QWV[F
/* %Y9CZRY9
* (non-Javadoc) FJn.V1
* &7r a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c IPOI'3d
*/ !&5*H06
public void sort(int[] data) { |FSp`P
int[] temp=new int[data.length]; {TDZDH
mergeSort(data,temp,0,data.length-1); /0XmU@B
} 2G_]Y8
7j88^59
private void mergeSort(int[] data, int[] temp, int l, int r) { %8xKBL]J
int i, j, k; 4zZ.v"laVM
int mid = (l + r) / 2; s&XL{FE
if (l == r) `v)ZOw9&
return; `^|l+TJG
if ((mid - l) >= THRESHOLD) Y8N+v+V/
mergeSort(data, temp, l, mid); sD|}?7
else }T}xVd0
insertSort(data, l, mid - l + 1); 3PlIn0+LX
if ((r - mid) > THRESHOLD) bCiyz+VyJn
mergeSort(data, temp, mid + 1, r); [2!C^\t
else {BgJ=0g?
insertSort(data, mid + 1, r - mid); x~K79Mya
|/n
for (i = l; i <= mid; i++) { p6ryUJc6
temp = data; QlS_{XV
} "]OROJGa
for (j = 1; j <= r - mid; j++) { R`B} T<*
temp[r - j + 1] = data[j + mid]; $EzWUt
} U2v;GIo$yU
int a = temp[l]; ,H1K sN
int b = temp[r]; hE<Sm*HU
for (i = l, j = r, k = l; k <= r; k++) { N|3#pHm@
if (a < b) { kI2+&
data[k] = temp[i++]; 7 D{%
a = temp; X,{[R |
} else { DO(3hIj
data[k] = temp[j--]; {|B[[W\TN
b = temp[j]; WdB\n/BWB
} =^\?{oV
} Ijk hV
} ]wi0qc2{
O%haaL\
/** +cKOIMu9
* @param data 7|GSs=
* @param l s+z5"3'n
* @param i X5)(,036
*/ >s1?rC
private void insertSort(int[] data, int start, int len) { n{&;@mgI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2e03m62*
} UtQCTNjC{
} ]Qa|9G,b
} !~vx|_$#
} v`]y:Ku|wR
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堆排序： B|,d
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package org.rut.util.algorithm.support; Nwe-7/Q
9!kp3x/`
import org.rut.util.algorithm.SortUtil; \CVHtV
KY%{'"'u
/** l(}MM|ka
* @author treeroot /lh1sHgD
* @since 2006-2-2 5G$ ,2i(
* @version 1.0 =\oL'>q
*/ 9v?@2sOoE
public class HeapSort implements SortUtil.Sort{ .U44p*I
x 4sIZe+
/* (non-Javadoc) O0s!3hKu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4nQ5zwiV
*/ 9qgs*]J
public void sort(int[] data) { e+D]9wM8
MaxHeap h=new MaxHeap(); .N@+Ms3
h.init(data); d3S Me
for(int i=0;i h.remove(); 72.Msnn
System.arraycopy(h.queue,1,data,0,data.length); x5V))~Ou
} I|qhj*_C
(DS"*4ty
private static class MaxHeap{ VaGQre
-sZb+2tDa
void init(int[] data){ S~E@A.7
this.queue=new int[data.length+1]; G_,9h!e
for(int i=0;i queue[++size]=data; #z<#oC5
fixUp(size); BV }CmU&DA
} C/#pK2xY
} Xo]2iQy
B]:|;d
private int size=0; dUt4] ar
DwZRx@
private int[] queue; N)AlQ'Lwx
%KkC1.yu<
public int get() { dr+(C[=
return queue[1]; >]xW{71F@
} -2>s#/%
u'Q82l&Y
public void remove() { 0t}v@-abU
SortUtil.swap(queue,1,size--); / o I 4&W
fixDown(1); :]]x^wony~
} bgKC^Q/F
file://fixdown v'b%m8
private void fixDown(int k) { 80'@+AD
int j; *78c2`)[
while ((j = k << 1) <= size) { HKI\i)c
if (j < size %26amp;%26amp; queue[j] j++; *Egg*2P;"Q
if (queue[k]>queue[j]) file://不用交换 cL~WDW/
break; WFFQxd|Z
SortUtil.swap(queue,j,k); saQs<1
k = j; EU%v |]
} ]+3M\ ib
} {i?G:K
private void fixUp(int k) { ~<9e}J
while (k > 1) { }r,xx{.u7
int j = k >> 1; ~;H,cPvrEg
if (queue[j]>queue[k]) (=;'>*L(
break; DuR9L'
SortUtil.swap(queue,j,k); _ahp7-O
k = j; vYb4&VV
} <!XunXh
} #jG?{j3;?
,d38TN
} %=9o'Y,4
LjE3|+pJ
} *pSnEWwE
a^@.C5
SortUtil： rTR"\u7&H
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package org.rut.util.algorithm; Qkx*T9W
a{Y|`*7y
import org.rut.util.algorithm.support.BubbleSort; ^Cp2#d*
import org.rut.util.algorithm.support.HeapSort; Ao}<a1f
import org.rut.util.algorithm.support.ImprovedMergeSort; gj @9(dk%
import org.rut.util.algorithm.support.ImprovedQuickSort; <nD@4J-A0
import org.rut.util.algorithm.support.InsertSort; d7[^pN
import org.rut.util.algorithm.support.MergeSort; .BBJhXtrdu
import org.rut.util.algorithm.support.QuickSort; [r8[lkR
import org.rut.util.algorithm.support.SelectionSort; av|T|J/(
import org.rut.util.algorithm.support.ShellSort; BlU&=;#r5>
;<Hk Cd
/** JfSe; v
* @author treeroot *8?2+)5"
* @since 2006-2-2 G"J nQ
* @version 1.0 ]bh%pn
*/ rC_1f3A
public class SortUtil { 5;" $X 1{
public final static int INSERT = 1; U\:Y*Ai
public final static int BUBBLE = 2; `14@dk
public final static int SELECTION = 3; XWS]4MB+vm
public final static int SHELL = 4; 76@W:L*J$J
public final static int QUICK = 5; SF+L-R<e
public final static int IMPROVED_QUICK = 6; fv+ET:T%
public final static int MERGE = 7; ='b)6R
public final static int IMPROVED_MERGE = 8; RIXeV*ix
public final static int HEAP = 9; y.D+M$f
#UL75
public static void sort(int[] data) { W0sLMHq
sort(data, IMPROVED_QUICK); ^U5N!"6R
} 6_QAE6A
private static String[] name={ Y`]P&y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" '%ilF1#
}; \}=T4w-e
[niFJIsc
private static Sort[] impl=new Sort[]{ 1q-;+Pd;
new InsertSort(), \UZGXk
new BubbleSort(), Qe_{<E
new SelectionSort(), /"D,gn1S*
new ShellSort(), ?<3 d Fb
new QuickSort(), Q%d%Io\-t
new ImprovedQuickSort(), =-:%~ng
new MergeSort(), 6}I X{nQI
new ImprovedMergeSort(), {c_bNYoE
new HeapSort() ?.< Qgd
}; dGOFSH
L5`k3ap|
public static String toString(int algorithm){ 1]=X
return name[algorithm-1]; j#2Xw25
} *|W](id7e
l3F$5n
public static void sort(int[] data, int algorithm) { K<5yjG8&
impl[algorithm-1].sort(data); Ro9:kEG$
} ANBuX6q
~%=%5}
public static interface Sort { U&])ow):
public void sort(int[] data); oc] C+l
} )e3w-es~4
8,IF%Z+LI
public static void swap(int[] data, int i, int j) { i*:QbMb
int temp = data; k-n`R)p:
data = data[j]; $}tF66d
data[j] = temp; , p}:?uR
} "}xIt)n%;
} SJP3mq/^K