[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; O2 + K
} ^si[L52BZ
int i1=l; !V/7q'&t=
int i2=mid+1; 2:nI4S
for(int cur=l;cur<=r;cur++){ w5/6+@}
if(i1==mid+1) s6_i>
data[cur]=temp[i2++]; b9-3
else if(i2>r) iAXGf V
data[cur]=temp[i1++]; lHTr7uF(
else if(temp[i1] data[cur]=temp[i1++]; zh\"sxL
else 15aPoxo>
data[cur]=temp[i2++]; 7kT X
} tuuwoiQ*`
} Hfo<EB2Y9N
`f~$h?}3-@
} Lz:FR*
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改进后的归并排序: EQ :>]O
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package org.rut.util.algorithm.support; xpwy%uo
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import org.rut.util.algorithm.SortUtil; &_hEM~{
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/** SK 5]7C2
* @author treeroot |m@>AbR5dk
* @since 2006-2-2 +StsSZ
* @version 1.0 w&J_c8S
*/ 8ZCA vEy
public class ImprovedMergeSort implements SortUtil.Sort { .4$F~!aj9
[*0M$4
private static final int THRESHOLD = 10; '#,C5*`
WQD:~*C:
/* 6uUn
* (non-Javadoc) Z*h}E
* fM*?i"j;Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G8/q&6f_
*/ ,\#s_N7
public void sort(int[] data) { cN&:V2,
int[] temp=new int[data.length]; C|3cQ{
mergeSort(data,temp,0,data.length-1); -:J<JX)o
} 72*j6#zS
UTN[!0[
private void mergeSort(int[] data, int[] temp, int l, int r) { .P?n<n#
int i, j, k; 2Yd@V}
int mid = (l + r) / 2; [cl+AV "
if (l == r) 9e vQQN6D|
return; )N1iGJO)
if ((mid - l) >= THRESHOLD) oj)(.X<8N
mergeSort(data, temp, l, mid); N#$]W"U
else PCV#O63[
insertSort(data, l, mid - l + 1); Q&^\YgkCf
if ((r - mid) > THRESHOLD) (pd~ 2!;C
mergeSort(data, temp, mid + 1, r); &%qDi_UD
else Tm7LaM
insertSort(data, mid + 1, r - mid); MEp{&#v|1
x7`+T1IJ
for (i = l; i <= mid; i++) { ;)P=WS:=
temp = data; TqfL Sm|
} Ck"db30.
for (j = 1; j <= r - mid; j++) { u&UmI-}
temp[r - j + 1] = data[j + mid]; >lzXyT6x8
} 83{P7PBQ;]
int a = temp[l]; suGd&eP|
int b = temp[r]; _Rkvg-
for (i = l, j = r, k = l; k <= r; k++) { dn Sb}J
if (a < b) { f\.y z[
data[k] = temp[i++]; ]+B.=mO_
a = temp; ^W@%(,xb
} else { (~E-=+R[$&
data[k] = temp[j--]; z5Tsu1c
b = temp[j]; t+]1D@hv
} H=g%>W%3
} `<|<1,
} |>m'szca4
8c_X`0jy
/** i?uX'apk
* @param data X-,oL.:c
* @param l @7.7+blS"H
* @param i r3-<~k-
*/ PB5h5eX
private void insertSort(int[] data, int start, int len) { .]JIo&>5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T{"Ur:p
} o)7Ot\:E
} 9&`";dg
} S7#dyAX8
} j|N<6GSke
a l6y=;\jZ
堆排序： [C<K~
M*Ej*#
package org.rut.util.algorithm.support; "+wkruC
S?C.:
import org.rut.util.algorithm.SortUtil; iF837ng5
op9vz[o#4
/** OJJ [Er1
* @author treeroot H{S+^'5Y.
* @since 2006-2-2 kS9;Tjcx
* @version 1.0 Fu5Y<*x
*/ T]zD+/=
public class HeapSort implements SortUtil.Sort{ Y Q.Xl_
lz36;Fp
/* (non-Javadoc) 8~s0%%{,M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d,Oagx
*/ \@N~{72:k
public void sort(int[] data) { g7*Uuh#
MaxHeap h=new MaxHeap(); NqNU:_}
h.init(data); ~1twGG_;
for(int i=0;i h.remove(); }HmkTk
System.arraycopy(h.queue,1,data,0,data.length); P3Lsfi.
} CV\y60n
vTK8t:JQ~
private static class MaxHeap{ \b8#xT}
V@b7$z
void init(int[] data){ [[6"qq
this.queue=new int[data.length+1]; A|:+c*7]
for(int i=0;i queue[++size]=data; RjPkH$u'Pj
fixUp(size); 7wPI)]$
} nLG)>L
} r `n|fD.
{#4a}:3
private int size=0; H>;,r,
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private int[] queue; a7F_{Mm
Qzo -Yw`=
public int get() { H.'9]*
return queue[1]; C7*YZe
} W;UPA~nT~
h$6'9rL&i
public void remove() { r^<,f[yH
SortUtil.swap(queue,1,size--); V&vG.HAT
fixDown(1); l5&5VC)
} fR'!p: ~
file://fixdown {Bk` Zlki
private void fixDown(int k) { xRhGBb{@s
int j; ]BjYUTNm
while ((j = k << 1) <= size) { <jF&+[*iT
if (j < size %26amp;%26amp; queue[j] j++; .!Z5A9^
if (queue[k]>queue[j]) file://不用交换 q0Q[]|L
break; !&g_hmnIF
SortUtil.swap(queue,j,k); V4ePYud;^
k = j; F+Qnf'at1
} )j~{P
} :.]EM*p?GV
private void fixUp(int k) { RH _b
while (k > 1) { !-470J
int j = k >> 1; %N~c9B
if (queue[j]>queue[k]) p}1gac_c
break; Tgtym"=xd
SortUtil.swap(queue,j,k); Y,Z$U| U
k = j; %%?}db1n
} GQY" +xa8]
} Oy=0Hsh@x
X=)L$Kd7
} ;w"h n*
mhhc}dS(H
} JU^Y27
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SortUtil： e.DN,rhqI
cyB+(jLHDs
package org.rut.util.algorithm; 1R~$m
BF gxa#De
import org.rut.util.algorithm.support.BubbleSort; Zn r4^i&(
import org.rut.util.algorithm.support.HeapSort; 3MHpP5C
import org.rut.util.algorithm.support.ImprovedMergeSort; U= f9b]Y
import org.rut.util.algorithm.support.ImprovedQuickSort; XdV>6<gf{
import org.rut.util.algorithm.support.InsertSort; *v K~t|z
import org.rut.util.algorithm.support.MergeSort; kJf0..J[#<
import org.rut.util.algorithm.support.QuickSort; D3dh,&KO\
import org.rut.util.algorithm.support.SelectionSort; u;rmqo1
import org.rut.util.algorithm.support.ShellSort; E.NfVeq
RxJbQs$Ph
/** [9Rh"H;h
* @author treeroot JJWPte/
* @since 2006-2-2 r`6f
* @version 1.0 t855|
*/ R"O%##Ws
public class SortUtil { ]f&]E ~i
public final static int INSERT = 1; K3 BWj33
public final static int BUBBLE = 2; ~< UYJc
public final static int SELECTION = 3; tg#jjXV\0p
public final static int SHELL = 4; 1z&"V}y
public final static int QUICK = 5; YQ?hAAJ
public final static int IMPROVED_QUICK = 6; *#}=>, v
public final static int MERGE = 7; \{ QH^
public final static int IMPROVED_MERGE = 8; f~P YK
public final static int HEAP = 9; Khi6z&B
P}gtJ;
public static void sort(int[] data) { vjm? X
sort(data, IMPROVED_QUICK); ,JK0N_=
} a1I-d=]
private static String[] name={ y4p"LD5%^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ce<z[?u
}; }[PwA[k'
_/>I-\xWA
private static Sort[] impl=new Sort[]{ k}<H
new InsertSort(), i{$P.i/&
new BubbleSort(), !]uB4
new SelectionSort(), t-C|x)J+
new ShellSort(), U ^O4HJ
new QuickSort(), <#M1I!R
new ImprovedQuickSort(), 6<S-o|Xw
new MergeSort(), EmUn&p%hI
new ImprovedMergeSort(), }\8-&VoY#X
new HeapSort() _)Txg2?=
}; MH'%E^n `
*.wj3'wV
public static String toString(int algorithm){ >T[Y>]
return name[algorithm-1]; |-{ Hy(9
} yxpv;v:)=
,|\\C6s
public static void sort(int[] data, int algorithm) { ZyNgG9JL]
impl[algorithm-1].sort(data); 7oIHp_Zq
} P6>C+T1
N@<-R<s^
public static interface Sort { Il@K8?H@
public void sort(int[] data); Nes|4Z<
} /O.q4p
b+whZtNk7
public static void swap(int[] data, int i, int j) { RfvvX$
int temp = data; 4|\M`T
data = data[j]; AdDR<IW
data[j] = temp; {GCp5
} V[WZ#u-p
} kP('X/