[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; ,SBL~JJ
} &lD4-_2J
int i1=l; 4 ClW*l
int i2=mid+1; C1_NGOvT
for(int cur=l;cur<=r;cur++){ QwiC2}/
if(i1==mid+1) hOV+}P6
data[cur]=temp[i2++]; #Jn_"cCRLx
else if(i2>r) 'ySWf,Q^
data[cur]=temp[i1++]; 6Z3v]X
else if(temp[i1] data[cur]=temp[i1++]; ,J[sg7vcv
else L6FUC6x"
data[cur]=temp[i2++]; r8qee$^M
} 607#d):Y
} J&5|'yVX
0-@waK
} Z^sO`C
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改进后的归并排序: (C!fIRY
kAqk~.
package org.rut.util.algorithm.support; K3jno+U&
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import org.rut.util.algorithm.SortUtil; tqHXzmsjW
niFjsTA.Z
/** 0Y\u,\GrxW
* @author treeroot .w0?
* @since 2006-2-2 DQ,QyV
* @version 1.0 Y$N|p{Z
*/ d{0>R{uac
public class ImprovedMergeSort implements SortUtil.Sort { E\QSU88^
&Z9b&P
private static final int THRESHOLD = 10; 5~qr+la
Si;e_a
/* zdY`c
* (non-Javadoc) +q3W t|
* ).-FuL4Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0j3j/={|.1
*/ 7JujU.&{6
public void sort(int[] data) { /q]WV^H
int[] temp=new int[data.length]; $jm'uDvm
mergeSort(data,temp,0,data.length-1); A/'G.H
} Dhq7qz
p0-\G6
private void mergeSort(int[] data, int[] temp, int l, int r) { 1j}o.0\
int i, j, k; #0weN%
int mid = (l + r) / 2; LG;xZQx'
if (l == r) GU=h2LSi]
return; pPh$Jvo]
if ((mid - l) >= THRESHOLD) KxY|:-"Tt
mergeSort(data, temp, l, mid); `P'{HT
else ?9AByg
insertSort(data, l, mid - l + 1); #x'C
if ((r - mid) > THRESHOLD) xe 6x!
mergeSort(data, temp, mid + 1, r); _I2AJn`#
else uu(.,11`
insertSort(data, mid + 1, r - mid); "3Ec0U \s
n] &fod
for (i = l; i <= mid; i++) { :^l`m9
temp = data; 0^hz1\g
} ?Hq`*I?b9
for (j = 1; j <= r - mid; j++) { 3B>!9:w~f
temp[r - j + 1] = data[j + mid]; 6MZfoR
} K~[/n<ks
int a = temp[l]; Qg3 -%i/@
int b = temp[r]; <n0-zCf
for (i = l, j = r, k = l; k <= r; k++) { }Za[<t BWS
if (a < b) { 3wD6,x-e
data[k] = temp[i++]; c!s{QWd%
a = temp; .sCo,
} else { HgbJsv$
data[k] = temp[j--]; 7pkc*@t
b = temp[j]; n`CmbM@@
} $+$+;1[
} u U\UULH0
} Q5baY\"9^
pS51fF9
/** tk~7>S
* @param data ZQ@^(64
* @param l TMGZHOAt
* @param i Dj?95Z,r
*/ 16xM?P
private void insertSort(int[] data, int start, int len) { pp/Cn4"w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,)%nLc
} 9-9`;Z
} c_%vD~6W-
} b>G!K)MS3
} C}wmoYikV
{DAwkJvb]
堆排序： Rg+V;C C~
m/CA
package org.rut.util.algorithm.support; d[jxU/.p;
5'.j+{"
import org.rut.util.algorithm.SortUtil; !k Hpw2
6D) vY
/** 9].!mpR
* @author treeroot I8e{%PK
* @since 2006-2-2 3xbA]u;gp
* @version 1.0 )4"G1R`3
*/ D{\hPv
public class HeapSort implements SortUtil.Sort{ ASPfzW2
pZF`+642
/* (non-Javadoc) lZ'NLbK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xq,{)G%9nM
*/ t4 $cMf
public void sort(int[] data) { 4WU 6CN
MaxHeap h=new MaxHeap(); Zn&X Uvdl
h.init(data); cy%^P^M
for(int i=0;i h.remove(); SkVW8n*s
System.arraycopy(h.queue,1,data,0,data.length); ?;!l-Dy
} -k")#1
cl)%qIXj}H
private static class MaxHeap{ ,}F{V>dhn
enE8T3
void init(int[] data){ /id(atiF^
this.queue=new int[data.length+1]; 6imDA]5N&
for(int i=0;i queue[++size]=data; R8?Xz5
fixUp(size); NgQ {'H[Y
} XoL9:s(m~
} t d-EB&i\
N'3Vt8o,
private int size=0; (hs[B4nV
V;Te =4
private int[] queue; m'@NF--#Oq
:p5V5iG
public int get() { PG+ICg
return queue[1]; gtqgf<mS
} 5o'V}
4ijoAW3A^
public void remove() { cea%M3
SortUtil.swap(queue,1,size--); 8?J\
fixDown(1); yIOoVi\m
} G"3D"7fa
file://fixdown U_B"B;ng+
private void fixDown(int k) { S3A OT
int j; 3I@j=:(%Y
while ((j = k << 1) <= size) { h1q?kA
if (j < size %26amp;%26amp; queue[j] j++; +)dQd T0Fq
if (queue[k]>queue[j]) file://不用交换 2:Zb'Mj
break; H<Ed"-n$I<
SortUtil.swap(queue,j,k); k[&+Iy
k = j; ]|@RWzA
} Xq` '^)
} cEhwv0f!qS
private void fixUp(int k) { 2a3i]e5Kt
while (k > 1) { -[^aWNqyJ
int j = k >> 1; wRCGfILw
if (queue[j]>queue[k]) OxZw;yD
break; &Vd,{JU
SortUtil.swap(queue,j,k); 2*ZB[5_V
k = j; \J.PrE'(}
} 7&DhEI ^
} &>XIK8*
eZ8~t/8
} ^~E?7{BL
!/[/w39D0o
} Mnn\y Tblp
g!,>.
SortUtil： A|Up>`QH
KD11<&4_x
package org.rut.util.algorithm; n3da@ClBt
'P3CgpF<Z2
import org.rut.util.algorithm.support.BubbleSort; TGlIt<&
import org.rut.util.algorithm.support.HeapSort; rd vq(\A
import org.rut.util.algorithm.support.ImprovedMergeSort; lb{<}1YR0o
import org.rut.util.algorithm.support.ImprovedQuickSort; M[g9D
import org.rut.util.algorithm.support.InsertSort; cNZuwS~,
import org.rut.util.algorithm.support.MergeSort; y 4j0nF
import org.rut.util.algorithm.support.QuickSort; mQ*:?\@
import org.rut.util.algorithm.support.SelectionSort; }`FC'!(
import org.rut.util.algorithm.support.ShellSort; w)2X0ev"
Yg3Vj=
/** 7j8nDX<
* @author treeroot }\!&3^I
* @since 2006-2-2 $<xa "aN!
* @version 1.0 Y_ b;1RN
*/ -]C3_ve
public class SortUtil { -|"W|K?nq
public final static int INSERT = 1; &-mPj82R
public final static int BUBBLE = 2; 60ccQ7=
public final static int SELECTION = 3; ~G+o;N,V
public final static int SHELL = 4; vN=e1\
public final static int QUICK = 5; p~vq1D6
public final static int IMPROVED_QUICK = 6; 5xtIez]x?
public final static int MERGE = 7; Ztu _UlGC
public final static int IMPROVED_MERGE = 8; 8+5z-vd
public final static int HEAP = 9; uQIa"u7
'85@U`e.
public static void sort(int[] data) { v1*Lf/
sort(data, IMPROVED_QUICK); Hpo7diBE
} $k5mI1~
private static String[] name={ ZJlmHlAX
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bL v_<\:m
}; J$JXY@mBSC
f?}~$agc
private static Sort[] impl=new Sort[]{ kGR5!8$z
new InsertSort(), \3a(8Em
new BubbleSort(), 'mx_]b^O
new SelectionSort(), U{6i5;F#H
new ShellSort(), aZ"9)RJe
new QuickSort(), 1iyd{r7|
new ImprovedQuickSort(), F0 x5(lpQ
new MergeSort(), ?nN3K
new ImprovedMergeSort(), $Hh3*reSg-
new HeapSort() _?$P?
}; MLf,5f;e
!|}(tqt
public static String toString(int algorithm){ A14}
return name[algorithm-1]; Hyx%FN=
} &.~Xl:lq
s4h3mypw
public static void sort(int[] data, int algorithm) { UlF=,0P
impl[algorithm-1].sort(data); 9U$n;uA
} j{PuZ^v1
o_C j o
public static interface Sort { 1<g,1TR
public void sort(int[] data); aMI\gCB/
} *ElR
.b'hVOs{
public static void swap(int[] data, int i, int j) { #Q320}]{
int temp = data; DWT4D)C,U
data = data[j]; OJ0Dw*K<
data[j] = temp; KFd !wZ@e
} 7[aSP5e>T
} k=L(C^VP