[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; $b,o3eC
} 56Z 1jN^U
int i1=l; B[%FZm$`M
int i2=mid+1; oKLL~X>!U
for(int cur=l;cur<=r;cur++){ }1=V`N(
if(i1==mid+1) u[5*RTE
data[cur]=temp[i2++]; TcPYDAa
else if(i2>r) 5V;BimI
data[cur]=temp[i1++]; )kfj+/
else if(temp[i1] data[cur]=temp[i1++]; NokAP|<y
else 1:h{( %`&
data[cur]=temp[i2++]; 56T<s+X>
} kq&xH;9=.
} Q(=} PF
h;?=:(
} rtd&WkU rD
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改进后的归并排序: 00X~/'!
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package org.rut.util.algorithm.support; UIPi<_Xa
owM3Gz%?UA
import org.rut.util.algorithm.SortUtil; biLx-F c
}SpjB
/** -LI^(_
* @author treeroot 4iMo&E<
* @since 2006-2-2 \Ld/'Z;w
* @version 1.0 CT(VV6I\
*/ s ~c_9,JK
public class ImprovedMergeSort implements SortUtil.Sort { FRqJ#yd]
do@`(f3g
private static final int THRESHOLD = 10; |)`<D
MHar9)$}
/* cBs:7Pnp%
* (non-Javadoc) COvcR.*0F
* 1W*%}!&Gm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VSns_>o
*/ Y%eFXYk.
public void sort(int[] data) { rG)K?B~
int[] temp=new int[data.length]; /R\]tl#2j
mergeSort(data,temp,0,data.length-1); QT)D|]bH
} "5:^aC]
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private void mergeSort(int[] data, int[] temp, int l, int r) { sx7;G^93
int i, j, k; [*^`rQ
int mid = (l + r) / 2; W?is8r:
if (l == r) /o%J /|
return; 6%?bl{pNn
if ((mid - l) >= THRESHOLD) Z&BJ/qk \-
mergeSort(data, temp, l, mid); ]U?)_P@}
else ,tqMMBwC~_
insertSort(data, l, mid - l + 1); 3Run.Gv\
if ((r - mid) > THRESHOLD) V/xGk9L~
mergeSort(data, temp, mid + 1, r); 8ExEhBX8
else )%H@.;cD_r
insertSort(data, mid + 1, r - mid); k<xPg5
[HNWM/ff7+
for (i = l; i <= mid; i++) { =qG%h5]n
temp = data; cXP*?N4Cf
} t6m&+N
for (j = 1; j <= r - mid; j++) { {6}H}_(]
temp[r - j + 1] = data[j + mid]; \o}m]v i
} A9qbE
int a = temp[l]; 5A^$!q P
int b = temp[r]; ,c }R*\
for (i = l, j = r, k = l; k <= r; k++) { )*6]m1
if (a < b) { od\-o:bS
data[k] = temp[i++]; a;@G
a = temp; 7tbM~+<0
} else { "%^T~Z(_j
data[k] = temp[j--]; jFAnhbbCE
b = temp[j]; C(/{53G(
} m+&)eQ:
} ~\HGV+S!g}
} N_<wiwI<
bp"@vlv
/** pHO,][VZ
* @param data pYXusS7S
* @param l ^&^~LKl~
* @param i _4~'K?
*/ ;.dyuKlI
private void insertSort(int[] data, int start, int len) { woI.1e5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [3KP@'52k
} )P>-~G2P
} Rb!V{jQ
} NW$_w
} UqsJ44QEZ
W_JFe(=3,
堆排序： rt +a/:4+
z#DgoA
package org.rut.util.algorithm.support; (tY0/s
ONr}{T%@/
import org.rut.util.algorithm.SortUtil; }wY6^JF
>s*ZT%TF
/** jEaU;
* @author treeroot RH^!7W*
* @since 2006-2-2 9|('*
* @version 1.0 Qg^Ga0Lf6
*/ ],.1=iY
public class HeapSort implements SortUtil.Sort{ aFfd!a"n
coG_bX?e
/* (non-Javadoc) w6cW7}ZD,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9?xD"Z
*/ E$8D^Zt
public void sort(int[] data) { r:xbs0 7
MaxHeap h=new MaxHeap(); L+GVB[@3Y
h.init(data); PP1?UT=]
for(int i=0;i h.remove(); * |dz.Tr
System.arraycopy(h.queue,1,data,0,data.length); j*7#1<T
} -9f+O^x
BNj@~uC{
private static class MaxHeap{ 4ju=5D];
7~f"8\
void init(int[] data){ ,\]`X7r
this.queue=new int[data.length+1]; WciL zx/
for(int i=0;i queue[++size]=data; k/lU]~PE
fixUp(size); 4Y.o RB
} V{D~e0i/v
} d[( }
zyh #ygH
private int size=0; -G|?Kl
ZYMacTeJjg
private int[] queue; m,3H]
x@aWvrL
public int get() { |<2g^ZK)
return queue[1]; j92X"yB
} O3*}L2j@
@,\J\ rb
public void remove() { CW+]Jv]"
SortUtil.swap(queue,1,size--); Ow3t2G
fixDown(1); O_S%PX
} |qAU\m"Pc
file://fixdown 1x'H#
private void fixDown(int k) { ;Yr?"|
int j; 1*VArr6*6
while ((j = k << 1) <= size) { 2d60o~E
if (j < size %26amp;%26amp; queue[j] j++; e$t$,3~
if (queue[k]>queue[j]) file://不用交换 jl)7Jd
break; =^5,ua6
SortUtil.swap(queue,j,k); [11D7L%1t
k = j; ,qz:(Nr
} R5b!Ao
} 2m8|0E|@
private void fixUp(int k) { wRj||yay#-
while (k > 1) { Z!81\5
int j = k >> 1; bd$``(b`v
if (queue[j]>queue[k]) j8cXv
break; l'Kx#y$
SortUtil.swap(queue,j,k); <aRsogu"P
k = j; x o{y9VS
} s~tZN
} s9\N{ar#
Hgk@I;
} t`!@E#VK
oQ{ X2\
} Pxy+W*t
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SortUtil： &`LR{7m
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package org.rut.util.algorithm; O,_k.EH
oa"_5kn,
import org.rut.util.algorithm.support.BubbleSort; \&,{N_G#L.
import org.rut.util.algorithm.support.HeapSort; j0.E!8Ae{
import org.rut.util.algorithm.support.ImprovedMergeSort; G^W'mV$xl
import org.rut.util.algorithm.support.ImprovedQuickSort; x1'4njTV$
import org.rut.util.algorithm.support.InsertSort; S0]JeP+3!
import org.rut.util.algorithm.support.MergeSort; 6$5?%ZLJ
import org.rut.util.algorithm.support.QuickSort; ,T;T%/ S
import org.rut.util.algorithm.support.SelectionSort; >V$ S\"
import org.rut.util.algorithm.support.ShellSort; o ?`LZd:{
jFH wu*
/** x T{s%wE
* @author treeroot Id<O/C
* @since 2006-2-2 k"pN
* @version 1.0 *a2-Vte
*/ k+%c8w 9
public class SortUtil { FE4P EBXvu
public final static int INSERT = 1; g}gOAN3.
public final static int BUBBLE = 2; 6Z>G%yK
public final static int SELECTION = 3; `Re{j{~s
public final static int SHELL = 4; dhCrcYn
public final static int QUICK = 5; m> YjV>5
public final static int IMPROVED_QUICK = 6; (p!w`MSv
public final static int MERGE = 7; ypy
public final static int IMPROVED_MERGE = 8; =}OcMM`f
public final static int HEAP = 9; 3T)_(SM"
5STk"
public static void sort(int[] data) { {9;x\($&a
sort(data, IMPROVED_QUICK); 3'xmq
} (/e[n.T
private static String[] name={ Lz:Q6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N;|:Ks#!
}; @@=e-d
557%^)v
private static Sort[] impl=new Sort[]{ :7L[v9'
new InsertSort(), ltg\x8w?c
new BubbleSort(), z>A;|iL
new SelectionSort(), WCL#3uYk"
new ShellSort(), 0o]T6
new QuickSort(), ,: Z7P@
new ImprovedQuickSort(), z:)z]6
new MergeSort(), =DsFR9IB
new ImprovedMergeSort(), ohlCuH3
new HeapSort() xDO1gnH%
}; Z1N=tL
& oj$h
public static String toString(int algorithm){ kj]m@mS[
return name[algorithm-1]; B{2WvPX~q
} eEZZ0NNe;
{D`_q|
public static void sort(int[] data, int algorithm) { s#4Q?<65u
impl[algorithm-1].sort(data); %j. *YvveW
} #QM9!k@9k
=j^wa')
public static interface Sort { rL23^}+^`
public void sort(int[] data); `-yiVUp1:z
} 1{$=N2U
)F3>
public static void swap(int[] data, int i, int j) { 5XF&yYWq
int temp = data; wfq}NK;
data = data[j]; 01">$
data[j] = temp; [{-5
} wCw_aXqq
} ^<`uyY))Q