[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; d0@&2hO
} =}bDT2Nb
int i1=l; jRk"#:
int i2=mid+1; m :6.
for(int cur=l;cur<=r;cur++){ J(k\Pz*
if(i1==mid+1) ?`m#Y&Oi
data[cur]=temp[i2++]; PP2>v|
else if(i2>r) ;oej~
data[cur]=temp[i1++]; +[ +4h}?
else if(temp[i1] data[cur]=temp[i1++]; QD<GXPu?N
else =5a|'O
data[cur]=temp[i2++]; i,[S1g
} )oEHE7y
} #:^aE|s
(qf%,F,_L
} |.OXe!uU41
v)^8e0vx
改进后的归并排序: \!+sL JP
xWZ87
package org.rut.util.algorithm.support; tWBfIHiha
Y|*a,H"_
import org.rut.util.algorithm.SortUtil; OGDCC/
MF7q*f
/** 5Op|="W.
* @author treeroot OKXELP
* @since 2006-2-2 ?9Lp@k~TO
* @version 1.0 P^wDt14>
*/ y:C=Ni&,"
public class ImprovedMergeSort implements SortUtil.Sort { qy]tuKZI
%OI4}!z@l
private static final int THRESHOLD = 10; I}?+>cf
cO&(&*J r
/* 4,nUCT
* (non-Javadoc) V^v?;f?
* f WUFCbSU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z5V~m_RO
*/ ?+Q?K30:
public void sort(int[] data) { =vd9mb-
int[] temp=new int[data.length]; ;x]CaG)f
mergeSort(data,temp,0,data.length-1); K\bA[5+N
} ,Pq@{i#
SxAZ2|/-
private void mergeSort(int[] data, int[] temp, int l, int r) { 4[&L<D6h
int i, j, k; m%=] j<A
int mid = (l + r) / 2; vpnOc2 -
if (l == r) n86=1G:%
return; ZQY]c
if ((mid - l) >= THRESHOLD) W%6Y?pf)z
mergeSort(data, temp, l, mid); lk<}`#(g
else W7\s=t\
insertSort(data, l, mid - l + 1); ji8)/
if ((r - mid) > THRESHOLD) ~8A !..Z
mergeSort(data, temp, mid + 1, r); q6A"+w,N
else :1O49g3R
insertSort(data, mid + 1, r - mid); h(<2{%j
1N3qMm^
for (i = l; i <= mid; i++) { sQIzcnKB
temp = data; s-S#qGZ
} qHU=X"rn
for (j = 1; j <= r - mid; j++) { 4!l%@R>O2
temp[r - j + 1] = data[j + mid]; `oPUf!
} %^zGM^PD
int a = temp[l]; IP#?$X
int b = temp[r]; u0s25JY.%
for (i = l, j = r, k = l; k <= r; k++) { acPX2B[jJ
if (a < b) { v`G[6Z
data[k] = temp[i++]; ees^j4
a = temp; w~}*MsB
} else { :iKk"r,2P[
data[k] = temp[j--]; xE0'eC5n^
b = temp[j]; l-~ o&n
} #9's^}i
} eeix-Wt*E
} 9i8 ~
7uI~Xo?N
/** y}.?`/Q#
* @param data zfm-vU
* @param l t,v=~LE
* @param i x%$as;
*/ 4ayZ.`aK
private void insertSort(int[] data, int start, int len) { ;7 F'xz"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Klv~#9Si
} JX $vz*KF
} Qf$3!O}G
} P {8d.
} '1f:8
~T'!.^/
堆排序： y%wjQC 0~
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package org.rut.util.algorithm.support; Z1&<-T_
u/,ng&!
import org.rut.util.algorithm.SortUtil; gf]k@-)
_d J"2rx
/** ;oT!\$Mu
* @author treeroot kJfMTfl,
* @since 2006-2-2 kX1#+X
* @version 1.0 }Q<cE$c
*/ ]K^#'[
public class HeapSort implements SortUtil.Sort{ ?T (@<T
NH$!<ffz
/* (non-Javadoc) 5@3hb]J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $z":E(oy
*/ #]MV
public void sort(int[] data) { Y!0ZwwW
MaxHeap h=new MaxHeap(); k04CSzE"%
h.init(data); (G#QRSXc\
for(int i=0;i h.remove(); s2N~p^
System.arraycopy(h.queue,1,data,0,data.length); 1P '_EJ]M
} PDQ\ND
920 o]Dh=t
private static class MaxHeap{ {i!@C(M3
kbR!iPM-;
void init(int[] data){ exfJm'R?n
this.queue=new int[data.length+1]; )r +o51gp
for(int i=0;i queue[++size]=data; q'zV9
fixUp(size); /bBFPrW
} tAxS1<T4
} D(YNa
:OFL@byS
private int size=0; wgV?1S>Z
>oOZDuj
private int[] queue; <aVfgVS
jeLC)lQ*
public int get() { {YT@$K]w,
return queue[1]; !92zC._
} c1CUG1i
+o*&JoC
public void remove() { O.+02C_*
SortUtil.swap(queue,1,size--); 8h=Rfa9
fixDown(1); @*s7~:VQ
} '4x uH3
file://fixdown rf[w&~R
private void fixDown(int k) { NMCMY<o
int j; _go1gf7
while ((j = k << 1) <= size) { dK^WZQ
if (j < size %26amp;%26amp; queue[j] j++; 9yA? 82)E
if (queue[k]>queue[j]) file://不用交换 "A0J~YvYWJ
break; gbclk~kX
SortUtil.swap(queue,j,k); ]u(EEsG/
k = j; + NpHk
} Oj`I=O6
} x[w!buV0\
private void fixUp(int k) { dh.vZ0v=7
while (k > 1) { d0"Xlleld
int j = k >> 1; Kz`g Q|S
if (queue[j]>queue[k]) D3MRRv#
break; qL 0{w7
SortUtil.swap(queue,j,k); nxZ[E.-\
k = j; N*CcJp{Q
} Z8yt8O
} O*%@(w6
re-;s
} fZ6"DJZ
q4wS<,3
} 61"w>;d6
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SortUtil： mO1r~-~AJ
x_K8Gr#Z0
package org.rut.util.algorithm; ja_.{Zv
K:3u/C`
import org.rut.util.algorithm.support.BubbleSort; ?-HLP%C('
import org.rut.util.algorithm.support.HeapSort; y {PUklq
import org.rut.util.algorithm.support.ImprovedMergeSort; Qv`Lc]'
import org.rut.util.algorithm.support.ImprovedQuickSort; r`8>@2sW1
import org.rut.util.algorithm.support.InsertSort; u}:p@j}Zv
import org.rut.util.algorithm.support.MergeSort; %DKQ
import org.rut.util.algorithm.support.QuickSort; POl[]ni=>
import org.rut.util.algorithm.support.SelectionSort; 7LQLeQvB
import org.rut.util.algorithm.support.ShellSort; ZP]l%6\.
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/** |@rPd=G^(/
* @author treeroot bm &$wf
* @since 2006-2-2 mX2(SFpJar
* @version 1.0 ~ PO)>;
*/ N<e=!LV
public class SortUtil { Oc51|[ Wj
public final static int INSERT = 1; 4FWb5b!A=
public final static int BUBBLE = 2; 2itJD1;
public final static int SELECTION = 3; tqnvC UIE
public final static int SHELL = 4; efK|)_i :
public final static int QUICK = 5; ,:Q+>h
public final static int IMPROVED_QUICK = 6; 2]$ 7
public final static int MERGE = 7; <|Pw*L$
public final static int IMPROVED_MERGE = 8; lf<?k
public final static int HEAP = 9; zNu>25/)(
'_f]qNy
public static void sort(int[] data) { JDQ7
sort(data, IMPROVED_QUICK); E3):8>R;1
} ]dx6E6A,
private static String[] name={ *?'^Rc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !`3q9RT3."
}; yXuF<+CJ
ku@sQn
private static Sort[] impl=new Sort[]{ !rK,_wH
new InsertSort(), HF2w?:
new BubbleSort(), 0/1Ay{ns
new SelectionSort(), !9B`
new ShellSort(), M<4tjVQ6
new QuickSort(), @w8MOT$
new ImprovedQuickSort(), w^_[(9 `
new MergeSort(), |f:1Br
new ImprovedMergeSort(), x&ngCB@O
new HeapSort() z'FpP
}; ?89K [D|
yX-h|Cr"
public static String toString(int algorithm){ N"tEXb/,
return name[algorithm-1]; BIBBp=+
} $CgJ+ua\8
^an3&
public static void sort(int[] data, int algorithm) { 'aW}&!H M
impl[algorithm-1].sort(data); qu}&4_`%:V
} q ,C)AZ
G2
public static interface Sort { k*?Axk#
public void sort(int[] data); Cwb}$=p'
} i^i^g5l!
^lt;K{
public static void swap(int[] data, int i, int j) { f vAF0 a
int temp = data; [K*>W[n
data = data[j]; )[w_LHKI
data[j] = temp; jt*VD>ji
} J:N4F.o&K
} +&U{>?.u