[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; x\:KfYr4Y;
} br k*;
int i1=l; +`mI\+y,
int i2=mid+1; <rui\/4NJ
for(int cur=l;cur<=r;cur++){ :w|=o9J
if(i1==mid+1) G^VOA4
data[cur]=temp[i2++]; bF,.6iKI
else if(i2>r) 't*]6^
data[cur]=temp[i1++]; -U9C{q?h
else if(temp[i1] data[cur]=temp[i1++]; ku}`PS0UGd
else o>yXEg
data[cur]=temp[i2++]; MwQt/Qv=
} d, ?GW
} # SJJ@SM
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} cCx{ ")
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改进后的归并排序: Ayn$,
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package org.rut.util.algorithm.support; {=gJGP/}_
./'d^9{
import org.rut.util.algorithm.SortUtil; eMV8`&c'
@y * TVy
/** rHOhi|+
* @author treeroot `e3$jy@
* @since 2006-2-2 JwWxM3(%t
* @version 1.0 Y8lZ]IB
*/ SH8zkAA7u}
public class ImprovedMergeSort implements SortUtil.Sort { B#5[PX
-lv(@7o~
private static final int THRESHOLD = 10; jpW_q+^?
cuy9QBB :
/* V=1zk-XC
* (non-Javadoc) |:2B)X
* fWri7|"0h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <_=O0 t|6
*/ c1y+kvv
public void sort(int[] data) { x7i<dg&
int[] temp=new int[data.length]; WMWMb3
mergeSort(data,temp,0,data.length-1); QSM3qke
} R(P(G;#j
D8Mq '$-
private void mergeSort(int[] data, int[] temp, int l, int r) { 5.yiNWh
int i, j, k; i-@V
int mid = (l + r) / 2; R@_3?Z!W=
if (l == r) ^f"|<r
return; kG}F/GN?
if ((mid - l) >= THRESHOLD) `2x.-
mergeSort(data, temp, l, mid); 0mmHN`<
else gnxD'1_
insertSort(data, l, mid - l + 1); r[GH#vF;7
if ((r - mid) > THRESHOLD) _X=6M gU
mergeSort(data, temp, mid + 1, r); zA3r&stN+
else IQ-l%x[fue
insertSort(data, mid + 1, r - mid); asmu<
anfnqa8
for (i = l; i <= mid; i++) { {7%HK2='
temp = data; \\Q){\S
} 3=Rk(%:;
for (j = 1; j <= r - mid; j++) { 5e7\tBab
temp[r - j + 1] = data[j + mid]; =43NSY
} L8NZU*"
int a = temp[l]; OZ"76|H1`
int b = temp[r]; !g=b=YK
for (i = l, j = r, k = l; k <= r; k++) { s&$e}yxVO
if (a < b) { Zv-1*hhHf
data[k] = temp[i++]; 0E (G1o'
a = temp; &0%B3
} else { ORWi+H|
data[k] = temp[j--]; ryA+Lli.
b = temp[j]; =d:3]M^
} >NV1#\5_R@
} oEFo7X`t
} )<_qTd0`
2*Pk1vrI
/** !u .n
* @param data # kNp);
* @param l O2="'w'kR
* @param i ~kDJ-V
*/ &o1k_!25
private void insertSort(int[] data, int start, int len) { 8HIX$OX>2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1cRF0MI
} HNj;_S
} fM*?i"j;Y
} G8/q&6f_
} n'JS-
FS!)KxC/-
堆排序： gm!sLZ!X
8.I3%u
package org.rut.util.algorithm.support; 3=} P l,
('\sUZ+5
import org.rut.util.algorithm.SortUtil; |R!ozlL{}
k9:|CEP
/** 49}WJC7 )
* @author treeroot lB_X mI1t
* @since 2006-2-2 ~82 {Y _{/
* @version 1.0 C-h?#/#?y
*/ oj)(.X<8N
public class HeapSort implements SortUtil.Sort{ N#$]W"U
@v&s|X'
/* (non-Javadoc) :$PrlE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (pd~ 2!;C
*/ &%qDi_UD
public void sort(int[] data) { Tm7LaM
MaxHeap h=new MaxHeap(); MEp{&#v|1
h.init(data); x7`+T1IJ
for(int i=0;i h.remove(); gwXmoM5
System.arraycopy(h.queue,1,data,0,data.length); S{f,EBE
} }:;UnE}
Km,o+9?1gF
private static class MaxHeap{ R osU~OK
O/d]2<V
void init(int[] data){ suGd&eP|
this.queue=new int[data.length+1]; _Rkvg-
for(int i=0;i queue[++size]=data; dn Sb}J
fixUp(size); f\.y z[
} cx&\oP
} ^W@%(,xb
(~E-=+R[$&
private int size=0; z5Tsu1c
t+]1D@hv
private int[] queue; H=g%>W%3
`<|<1,
public int get() { |>m'szca4
return queue[1]; 8c_X`0jy
} [/VpvQ'
X-,oL.:c
public void remove() { @7.7+blS"H
SortUtil.swap(queue,1,size--); r3-<~k-
fixDown(1); PB5h5eX
} "Jg.)1Jw
file://fixdown H270)Cwn+
private void fixDown(int k) { 4gNN "
int j; J]{<Z?%
while ((j = k << 1) <= size) { 2 >j0,2
if (j < size %26amp;%26amp; queue[j] j++; YPNW%N!$|
if (queue[k]>queue[j]) file://不用交换 re}PpXRC
break; r)K5<[\r
SortUtil.swap(queue,j,k); [?O4l`
k = j; 1sonDBd0@;
} n00J21
} _<Ij)#Rq7
private void fixUp(int k) { >D}|'.&
while (k > 1) { Q.h.d))
int j = k >> 1; ;BT7pyu%[
if (queue[j]>queue[k]) k.o8!aCm
break; )Ho"b
SortUtil.swap(queue,j,k); KZVdW@DY
k = j; sK&kp=zu
} @F$}/
} {2D|,yH=
X#ud5h
} v>Kh5H5e~
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} o^*:
pL`Q+}c}
SortUtil： -;&I S
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package org.rut.util.algorithm; bj6Yz,g F
}Bsh!3D<.
import org.rut.util.algorithm.support.BubbleSort; #)twk`!^
import org.rut.util.algorithm.support.HeapSort; X"r.*fb;N
import org.rut.util.algorithm.support.ImprovedMergeSort; YZSQOLN{
import org.rut.util.algorithm.support.ImprovedQuickSort; B7|%N=S%/
import org.rut.util.algorithm.support.InsertSort; <j,3Dn
import org.rut.util.algorithm.support.MergeSort; e.%I#rNI
import org.rut.util.algorithm.support.QuickSort; -o`K/f}d
import org.rut.util.algorithm.support.SelectionSort; ^,AE;ZT7
import org.rut.util.algorithm.support.ShellSort; S<cz2FlV
7 @}`1>97
/** c ^.^5@
* @author treeroot 1r}i[5
* @since 2006-2-2 ^RT_Lky
* @version 1.0 Y&U-d{"
*/ Haekr*1%
public class SortUtil { ~_ZK93o(
public final static int INSERT = 1; ge6S_"
public final static int BUBBLE = 2; ?< teHFj
public final static int SELECTION = 3; ]sL.+.P
public final static int SHELL = 4; Y;huTZ
public final static int QUICK = 5; t!6uz
public final static int IMPROVED_QUICK = 6; Ka-o$o[^u`
public final static int MERGE = 7; JehanF[
public final static int IMPROVED_MERGE = 8; ]Sa#g&}T>
public final static int HEAP = 9; 8]`s&d@GY
GIcq|Pe
public static void sort(int[] data) { zuW4gJ
sort(data, IMPROVED_QUICK); HR8YPU5
} I *sT*;U
private static String[] name={ 8Q<Nl=g>'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R%\3[
}; -Fn/=
'/9j"mIA9$
private static Sort[] impl=new Sort[]{ U:n~S
new InsertSort(), CLVT5pj='
new BubbleSort(), gT$WG$^i
new SelectionSort(), FK~wr;[
new ShellSort(), rOt{bh6r
new QuickSort(), %7aJSuQN%
new ImprovedQuickSort(), *GBV[D[G,
new MergeSort(), r"h09suZBW
new ImprovedMergeSort(), Z$KyK.FUU
new HeapSort() %N~c9B
}; )e`9U.C
A^X\
public static String toString(int algorithm){ ('C)S)98C
return name[algorithm-1]; ecz-jZ! `
} wbKJ:eWgt
[7gz?9VyLF
public static void sort(int[] data, int algorithm) { xW5`.^5
impl[algorithm-1].sort(data); [m h>N$
} `^hA&/1
:.XlAQR~b
public static interface Sort { ~,&8)1
public void sort(int[] data); o4EY2
} S|k@D2k=
9ck"JMla
public static void swap(int[] data, int i, int j) { Dbj?l;'1
int temp = data; (Z?f eUxp
data = data[j]; CkNR{?S
data[j] = temp; yx-"&K=`
} :LNZC,-f}5
} U2<q dknB