[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; qW!]co
} s<oNE)xe
int i1=l; 1_\;- !t
int i2=mid+1; !1q 9+e
for(int cur=l;cur<=r;cur++){ %!du,2
if(i1==mid+1) 6ek;8dL
data[cur]=temp[i2++]; e'0{?B
else if(i2>r) Md0sK
data[cur]=temp[i1++]; AgFVv5
else if(temp[i1] data[cur]=temp[i1++]; -PS#Z0>
else ))&;}2{
data[cur]=temp[i2++]; PI`jExL
} q o\?o
} _io+YzS
[k6nW:C
} [ { bV4
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改进后的归并排序: =$nB/K,8AX
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package org.rut.util.algorithm.support; M@?xa/E64
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import org.rut.util.algorithm.SortUtil; w:?oTuw
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/** XLL/4)
* @author treeroot |!"2fI
* @since 2006-2-2 Iz ;G*W18
* @version 1.0 =li|
*/ 'g$(QvGF9
public class ImprovedMergeSort implements SortUtil.Sort { 4\6N~P86
iVd.f A
private static final int THRESHOLD = 10; sVJ!FC
*e-A6Sh
/* :cGt#d6
* (non-Javadoc) {K9/HqH
* _>9.v%5cs(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ti'}MC+0
*/ co9 .wB@
public void sort(int[] data) { ,(;lIP
int[] temp=new int[data.length]; 3:8{"md@2
mergeSort(data,temp,0,data.length-1); #Sa27$&.>
} P&b19K'
zxf"87se
private void mergeSort(int[] data, int[] temp, int l, int r) { f-5:wM&
int i, j, k; VY)9|JJCO
int mid = (l + r) / 2; z}{afEb
if (l == r) #{=;NuP
return; 5g9; +}X;
if ((mid - l) >= THRESHOLD) DSt]{fl`P
mergeSort(data, temp, l, mid); nzmDA6d
else jcI&w#re
insertSort(data, l, mid - l + 1); YhY:~
if ((r - mid) > THRESHOLD) ds&e|VSH;
mergeSort(data, temp, mid + 1, r); ]ut5S>,"
else `&-Mi[1
insertSort(data, mid + 1, r - mid); 8Goh4T H
3"G>>nC&
for (i = l; i <= mid; i++) { 8HRmQ
temp = data; e0J6Ae4V[
} z,VD=Hnz
for (j = 1; j <= r - mid; j++) { jK' N((Hz
temp[r - j + 1] = data[j + mid]; \mV'mZ9>
} 4E+hRKuo,
int a = temp[l]; Op>%?W8/UF
int b = temp[r]; *P#WDXRwd
for (i = l, j = r, k = l; k <= r; k++) { ?}m']4p
if (a < b) { Q4*fc^?u
data[k] = temp[i++]; jq+A-T}@
a = temp; ,:`ND28V7
} else { dlG=Vq&Y
data[k] = temp[j--]; jS]><rm
b = temp[j]; =IUUeFv +r
} _>v<(7
} fgBM_c&9T
} 1&P<
cKn`/\.H
/** i| ZceX/
* @param data kWNV%RlSx
* @param l ;>AL`M+
* @param i ONCnVjZ
*/ YSj+\Z$(
private void insertSort(int[] data, int start, int len) { h68]=KyK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -CRQ&#p1]
} gq"gUaz
} Y;)dct
} Dc+'<"
} ixV0|P8,c
r YF #^
堆排序： }=|!:kiE
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package org.rut.util.algorithm.support; !H2QjW
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import org.rut.util.algorithm.SortUtil; yB3;
l/Vo-#
/** @]![o %
* @author treeroot bcAvM;
* @since 2006-2-2 l27\diKPJ
* @version 1.0 TuW/N L|
*/ 6:]*c[7
public class HeapSort implements SortUtil.Sort{ 06Gt&_Q
JKX_q&bUw
/* (non-Javadoc) ;r6jx"i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tw(JZDc
*/ [2dn\z28
public void sort(int[] data) { (E,Yo
MaxHeap h=new MaxHeap(); Raw)9tUt
h.init(data); ~`D|IWMDq
for(int i=0;i h.remove(); Z(ZiFPx2Z
System.arraycopy(h.queue,1,data,0,data.length); ?]rPRV
} VOr1
PC qZNBN
private static class MaxHeap{ (D 9Su^:1
7Su#Je]
void init(int[] data){ *A~ G_0B
this.queue=new int[data.length+1]; ;3 F"TH
for(int i=0;i queue[++size]=data; >+mD$:L
fixUp(size); )NO<s0?&
} F|&{Rt
} k2xHH$+{#=
m] W5+
private int size=0; 9<vWcq*4
dVQ-k
private int[] queue; RID]pek
fl;s9:<
public int get() { jA(>sz
return queue[1]; 2jbIW*
} $46{<4.
-!)xQvagD.
public void remove() { x)UwV
SortUtil.swap(queue,1,size--); !J=sk4T
fixDown(1); )I\=BPo|B
} a,o_`s<
file://fixdown {,cCEXag%
private void fixDown(int k) { k/03ZxC-
int j; jt@SZI`
while ((j = k << 1) <= size) { <F )_!0C
if (j < size %26amp;%26amp; queue[j] j++; 0A:n0[V:]
if (queue[k]>queue[j]) file://不用交换 fGv#s X
break; zFQ&5@43
SortUtil.swap(queue,j,k); &wU'p-V
k = j; $o+5/c?|
} !;Jmg
} BI:k#jO!
private void fixUp(int k) { *0_yT$
while (k > 1) { w0ZLcND{
int j = k >> 1; 7?v#'Ies
if (queue[j]>queue[k]) 2qi'g:qe
break; /cK%n4l.y
SortUtil.swap(queue,j,k); IG?'zppjd6
k = j; m'-|{c
} xvNo(>
} f/kI|Z
\*\R1_+
} h C=:q
9]'($:LF08
} >\ u<&>i
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SortUtil： za'6Y*CGgX
hCYQGx0
package org.rut.util.algorithm; E(Rh#+]Y5
=&dW(uyzY
import org.rut.util.algorithm.support.BubbleSort; 7DKz;o
import org.rut.util.algorithm.support.HeapSort; @=5qT]%U3J
import org.rut.util.algorithm.support.ImprovedMergeSort; aS}1Q?cU
import org.rut.util.algorithm.support.ImprovedQuickSort; ?4CNkk=v
import org.rut.util.algorithm.support.InsertSort; Cv)/7vyB8
import org.rut.util.algorithm.support.MergeSort; IkzTJ%>
import org.rut.util.algorithm.support.QuickSort; NA$zd(
import org.rut.util.algorithm.support.SelectionSort; 0lM{l?
import org.rut.util.algorithm.support.ShellSort; jxgj,h"}9`
GFk1/ F
/** zciCcrJ
* @author treeroot .bD_R7Bi6
* @since 2006-2-2 U Q@7n1
* @version 1.0 zu2HH<E
*/ Q/I)V2a1i
public class SortUtil { >\<*4J$PZ
public final static int INSERT = 1; }]UB;id'
public final static int BUBBLE = 2; "Dy'Kd%,%/
public final static int SELECTION = 3; Z.i{i^/#(
public final static int SHELL = 4; %b?$@H-Re
public final static int QUICK = 5; ^")F7`PF
public final static int IMPROVED_QUICK = 6; r,(et
public final static int MERGE = 7; nsb4S{
public final static int IMPROVED_MERGE = 8; I1U7.CT
public final static int HEAP = 9; 6 fz}
Q6C-4ja
public static void sort(int[] data) { z5Qs@dG
sort(data, IMPROVED_QUICK); XA_FOw!cX
} +~nzii3
private static String[] name={ _U|7'^|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Xj+q~4{|vt
}; wyxGe<1
:`vP}I ^
private static Sort[] impl=new Sort[]{ 6qo^2
new InsertSort(), >cL{Ya}Rz
new BubbleSort(), uk`8X`'
new SelectionSort(), qIwV q!=
new ShellSort(), fR-C0"c
new QuickSort(), W</n=D<,I
new ImprovedQuickSort(), t j Vh^
new MergeSort(), VyG4(Xva
new ImprovedMergeSort(), ^4v*W;Q
new HeapSort() T_<BVM
}; 1+y"i<3)
Zt3}Z4d
public static String toString(int algorithm){ ?lCd{14Mkh
return name[algorithm-1]; N?4q
} RAs0]K
io4A>>W==/
public static void sort(int[] data, int algorithm) { ALd;$fd qf
impl[algorithm-1].sort(data); Fs/?
} ^a9 oKI9n
^ons:$0h
public static interface Sort { w8~K/>!f
public void sort(int[] data); j%Y\A~DV
} ;SKh
s]B"qFA
public static void swap(int[] data, int i, int j) { *j)M]
int temp = data; -dTLunv
data = data[j]; ET^|z
data[j] = temp; \[wCp*;1}
} mZ0J!QYk
} pF=g||gS