[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; o$t &MST?i
} 3(o7co-f
int i1=l; fB7ljg
int i2=mid+1; <5k&)EoT
for(int cur=l;cur<=r;cur++){ E|{m"RUOy
if(i1==mid+1) 1w17L]4
data[cur]=temp[i2++]; ;:?*t{r4#
else if(i2>r) Bz:&f46{
data[cur]=temp[i1++]; %",ULtZ+
else if(temp[i1] data[cur]=temp[i1++]; ]zcV]Qj$~
else bM5CDzH(#X
data[cur]=temp[i2++]; #fN/LO
} L^)qe^%3
} z'*ml ?
3A d*,>!
} D$$3fN.iEL
"f<#.}8
改进后的归并排序: =1IEpxh%
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package org.rut.util.algorithm.support; B>@D,)/bT5
jr:drzr{I
import org.rut.util.algorithm.SortUtil; [aHlu[,
F:_FjxU
/** &urb!tQ>&
* @author treeroot gW}}5Xq
* @since 2006-2-2 "*t6t4/Q
* @version 1.0 W8VO)3nmD
*/ KX=/B=3~
public class ImprovedMergeSort implements SortUtil.Sort { M/l95fp
hg4J2m
private static final int THRESHOLD = 10; 2^J/6R$
Y&:/~&'
/* ^Eu_NUFe
* (non-Javadoc) K#@K"N=
* G>JxIrN0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J+iX,X
*/ Zikm?(J
public void sort(int[] data) { <ZV7|'^
int[] temp=new int[data.length]; WSS(Bm|B
mergeSort(data,temp,0,data.length-1); ExQ--!AC=
} _Qg{ ;
Kn.iyR
private void mergeSort(int[] data, int[] temp, int l, int r) { {o {#]fbO%
int i, j, k; |veBq0U
int mid = (l + r) / 2; HwM/}-t
if (l == r) c[Yq5Bu{y
return; ]a=l^Pc(xN
if ((mid - l) >= THRESHOLD) 9!cW
mergeSort(data, temp, l, mid); .jCk#@+
else f@L\E>t
insertSort(data, l, mid - l + 1); =@%MV(
if ((r - mid) > THRESHOLD) =^by0E2
mergeSort(data, temp, mid + 1, r); cmae&Atotw
else 1&}G+y
insertSort(data, mid + 1, r - mid); ONNW.xHp
kHZKj!!R
for (i = l; i <= mid; i++) { so'eZ"A:
temp = data; TZkTz P[
} pIL`WE1'
for (j = 1; j <= r - mid; j++) { *6'_5~G
temp[r - j + 1] = data[j + mid]; hl}dgp((
} [-QK$~[ g
int a = temp[l]; x7Eeb!s0f,
int b = temp[r]; noFh p
for (i = l, j = r, k = l; k <= r; k++) { IG>>j}
if (a < b) { ^T=5zqRD
data[k] = temp[i++]; ID&zY;f
a = temp; fq{I$syY
} else { 2AmR(vVa"
data[k] = temp[j--]; UX?X]ZYVR
b = temp[j]; R+C+$?4NG
} %uF:)
} WGluZhRuT3
} N:5b1TdI,
f7K8m|
/** omr:C8T>
* @param data Y/#:)(&@
* @param l VB}PNg
* @param i s9=pV4fA~w
*/ Ed4_<:
private void insertSort(int[] data, int start, int len) { 5QNBB|X@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =xl7vHn7
} -0/=k_q_
} {3jm%ex
} @ $9m>6V
} 4D0(Fl
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堆排序： WReYF+Uen
aIY$5^x
package org.rut.util.algorithm.support; 9[B<rz
oVAOGHE
import org.rut.util.algorithm.SortUtil; A7mMgb_
VNr!|bp5
/** 4c~*hMry
* @author treeroot 1V#B]x:
* @since 2006-2-2 rAtai}Lx
* @version 1.0 6="M0%
*/ 5B_-nYJDt
public class HeapSort implements SortUtil.Sort{ 9(V=Ubj
}Z<D^Z~w
/* (non-Javadoc) r@\,VD6J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g4?Q.'dZr
*/ DX7Ou%P,mg
public void sort(int[] data) { 8s\8`2=
MaxHeap h=new MaxHeap(); x A@|I#
h.init(data); qFB9,cUqh
for(int i=0;i h.remove(); 8uD8or
System.arraycopy(h.queue,1,data,0,data.length); RRK^~JQI.2
} Mp}!+K
iG?w;
private static class MaxHeap{ q_OY sg
})h'""i&xn
void init(int[] data){ `<. 7?
this.queue=new int[data.length+1]; |E>v~qD8I
for(int i=0;i queue[++size]=data; e-YGuWGN7
fixUp(size); PTfN+
} e<&_tx
} eG a#$x?.
Z_ iQU1
private int size=0; ~7FEY0/
P*?d6v,r
private int[] queue; XY&]T'A
g^Ugl=f,
public int get() { ^^20vwq
return queue[1]; n#/U@qVgc
} v]UU&Jq8U
3Y.d&Nz
public void remove() { 3 LZL!^ 5N
SortUtil.swap(queue,1,size--); D~[N_
fixDown(1); w yuJSB
} <lsi.x\y<
file://fixdown rF <iWM=
private void fixDown(int k) { p0%6@_FT~
int j; 4DG 9`5.
while ((j = k << 1) <= size) { A,-[/Z K/
if (j < size %26amp;%26amp; queue[j] j++; 98"z0nI%
if (queue[k]>queue[j]) file://不用交换 sYW1T @
break; 3"2<T^H]
SortUtil.swap(queue,j,k); n]kQtjJ
k = j; fS8XuT
} ?(|TP^
} 9OO0Ht4j
private void fixUp(int k) { i75?*ld
while (k > 1) { ,Jw\3T1V
int j = k >> 1; .~V".tZV[
if (queue[j]>queue[k]) Z`0r]V`Ys
break; 3\+[38 _
SortUtil.swap(queue,j,k); VdjU2d
k = j; ;'Z,[a
} Q9Xmb2LN
} P %U9S
6w:g77SH)%
} 4q@9
ZIGbwL
} pU'`9fLi_
[xp~@5r'
SortUtil： <*b]JY V@
|{}d5Z"5;}
package org.rut.util.algorithm; ?$`1%Y9
KqG$zC^N
import org.rut.util.algorithm.support.BubbleSort; ` i^`Q
import org.rut.util.algorithm.support.HeapSort; ?()E5 4y
import org.rut.util.algorithm.support.ImprovedMergeSort; ]ZU:%Qhu
import org.rut.util.algorithm.support.ImprovedQuickSort; KY(l<pm
import org.rut.util.algorithm.support.InsertSort; [W8iM7D
import org.rut.util.algorithm.support.MergeSort; |n-a\
import org.rut.util.algorithm.support.QuickSort; 7!` C TE
import org.rut.util.algorithm.support.SelectionSort; D{Jc+Q$
import org.rut.util.algorithm.support.ShellSort; t"!8
3qV>TE]6,
/** %'D:bi5
* @author treeroot 4p/V6kr&r
* @since 2006-2-2 @zq\z$
* @version 1.0 S3JygN*
*/ =":V WHf
public class SortUtil { =."WvBKg
public final static int INSERT = 1; iu:p&h
public final static int BUBBLE = 2; iA{chQBr
public final static int SELECTION = 3; aF4V|?+
public final static int SHELL = 4; gen3"\Og{
public final static int QUICK = 5; 7p"~:1hU
public final static int IMPROVED_QUICK = 6; 6m;wO r
public final static int MERGE = 7; m%[2x#
public final static int IMPROVED_MERGE = 8; DlQ[}5STF
public final static int HEAP = 9; C>(M+qXL+
*Tlws
public static void sort(int[] data) { )MX1776kU
sort(data, IMPROVED_QUICK); ?-6x]l=]
} O}\"$n>
private static String[] name={ jW+VUF-t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }1^tK(Am
}; ?6l,
3vvFF]D5k
private static Sort[] impl=new Sort[]{ _`Yvfz3
new InsertSort(), #dn%KMo2r
new BubbleSort(), "l2N_xX;
new SelectionSort(), [7Kj$PB3
new ShellSort(), gWU(uBS
new QuickSort(), 5GWM )vrZg
new ImprovedQuickSort(), d9e H}#OY
new MergeSort(), e[VJ0 A=
new ImprovedMergeSort(), nH3b<k;S
new HeapSort() X:} 5L>'
}; SJ|.% gn
5IF~]5s
public static String toString(int algorithm){ >=q!!'$:
return name[algorithm-1]; 6[Pr<4J
} %_X[{(
=w>>7u$4
public static void sort(int[] data, int algorithm) { 4@V<Suw
impl[algorithm-1].sort(data); B#V4
} m#}{"d&J
"lnk
public static interface Sort { + 1%^c(3
public void sort(int[] data); =jd=Qs IL
} rQQPs\o
^{]sD}Q"
public static void swap(int[] data, int i, int j) { fB ,!|u
int temp = data; Tk@g9\6O9
data = data[j]; {CyPcD'$s
data[j] = temp; C?<XtIoB
} }JTgj
} :@4>}k*