[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; Dhoj|lc
} I1~g?jpH
int i1=l; 0Pk-FSY|f
int i2=mid+1; Izu.I_$4
for(int cur=l;cur<=r;cur++){ %K7}yy&9C
if(i1==mid+1) cw.7YiU
data[cur]=temp[i2++]; (% P=#vZ
else if(i2>r) Ev16xL8B
data[cur]=temp[i1++]; wrU[#g,uvr
else if(temp[i1] data[cur]=temp[i1++]; -wfV
else }TW=eu~
data[cur]=temp[i2++]; !*gAGt_
} >``GDjcJ
} ,GIqRT4K
|Y11sDa9h
} ]r6bJ2
Bl];^W^P
改进后的归并排序: 6pR#z@,
aw1J#5j`n
package org.rut.util.algorithm.support; M'iKk[Hjfx
~@a R5Q>us
import org.rut.util.algorithm.SortUtil; +kL(lBv'
dk/*%a +
/** N}G(pq}
* @author treeroot 1`{ib
* @since 2006-2-2 G65N:
* @version 1.0 /GUuu
*/ w)n]}k
public class ImprovedMergeSort implements SortUtil.Sort { z%tu6_4j
S+Yg!RrNqj
private static final int THRESHOLD = 10; ;g jp&g9Q
6,1|y%(f
/* ".?{Y(~
* (non-Javadoc) (K6StNtN
* ]s@8I2_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #7h fEAk
*/ V&H8-,7z
public void sort(int[] data) { (02(:;1
int[] temp=new int[data.length]; gUA}%YXe
mergeSort(data,temp,0,data.length-1); nh)R
} `F8;{`a
{2^@jD
private void mergeSort(int[] data, int[] temp, int l, int r) { 9AzGk=^
int i, j, k; ,r;d{
int mid = (l + r) / 2; ]H~,K]@.
if (l == r) dy?|Q33Y"
return; XH$|DeAFM
if ((mid - l) >= THRESHOLD) q&T'x> /
mergeSort(data, temp, l, mid); f*}E\,V"&
else CJ
insertSort(data, l, mid - l + 1); 22~X~=
if ((r - mid) > THRESHOLD) cV,Dl`1r
mergeSort(data, temp, mid + 1, r); /ASI0h
else WI_mJ/2
insertSort(data, mid + 1, r - mid); @!3^/D3
, vyx`wDd
for (i = l; i <= mid; i++) { ,D,f9
temp = data; G| oG:
} Lu.tRZ`$38
for (j = 1; j <= r - mid; j++) { !13 /+ u
temp[r - j + 1] = data[j + mid]; _C=[bI@
} h\\2r>
int a = temp[l]; B-'BJ|*4I
int b = temp[r]; VQMd[/
for (i = l, j = r, k = l; k <= r; k++) { W r7e_
if (a < b) { _kX/LR"L+
data[k] = temp[i++]; %uqD\`-
a = temp; ![ID0}MjJ
} else { 7Sq{A@ET
data[k] = temp[j--]; +{!t~BW
b = temp[j]; cG!2Iy~lA
} =2]rA
} VQjFEJ
} 1";e'?^x
SliQwm5
/** -G#@BtB2+
* @param data iiB)/~!O
* @param l ^i)Q CDU7
* @param i L00;rTs>
*/ K |} ]<
private void insertSort(int[] data, int start, int len) { JD`;,Md
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); udI:]:,P
} |O+>#
} qS}RFM5|
} BBE1}V!u
} ^^3va)1{!
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堆排序： ^1yTL5#:Vw
<&EO=A
package org.rut.util.algorithm.support; "|r^l
s1 ^mk]
import org.rut.util.algorithm.SortUtil; !vVjZ
p2DNbY\]
/** Mth`s{sATa
* @author treeroot ;6 6_G Sjz
* @since 2006-2-2 5@t uo`k
* @version 1.0 )LrCoI =|
*/ $0S#d@v}
public class HeapSort implements SortUtil.Sort{ 4\SBf\ c
5J\|gZQF
/* (non-Javadoc) ;@YF}%!+W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xgqv2s>L
*/ uQtk|)T E
public void sort(int[] data) { <bXWkj
MaxHeap h=new MaxHeap(); S]%U]
h.init(data); Dw/Gha/
for(int i=0;i h.remove(); \R>5F\ 0
System.arraycopy(h.queue,1,data,0,data.length); DEp%\sj?
} mc=!X
.Jat^iFj0
private static class MaxHeap{ Q()RO*9
-1r&s
void init(int[] data){ ji)4WG/1
this.queue=new int[data.length+1]; 2DCcGKa"
for(int i=0;i queue[++size]=data; SAE'?_
fixUp(size); cvXI]+`<3\
} +s(IQt
} } .H Fm'p
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private int size=0; 3auJ^B}
NuS|X
private int[] queue; {}J@+Zsi
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public int get() { ;ko[(eFN@
return queue[1]; MLD>"W
} "kBqY+:Cn
P2Qyz}!wo
public void remove() { r{B,uj"
SortUtil.swap(queue,1,size--); 0.BUfuuh
fixDown(1); 2HK
} kGuk -P
file://fixdown $sL|'ZMbS
private void fixDown(int k) { q>|[JJ*6_N
int j; &A9A#It
while ((j = k << 1) <= size) { #C,f/PXfaB
if (j < size %26amp;%26amp; queue[j] j++; bu"68A;>
if (queue[k]>queue[j]) file://不用交换 ic0v*Y$
break; IL>/PuZku
SortUtil.swap(queue,j,k); ,F`KQ )\"
k = j; |`Oa/\U
} Y9@dZw%2
} W]yClx \
private void fixUp(int k) { ;4/dk_~p]
while (k > 1) { 97]a-)SA
int j = k >> 1; S-LZ(o{ZL
if (queue[j]>queue[k]) SC $`
break; >SxZ9T|%
SortUtil.swap(queue,j,k); m]=oaj@9
k = j; iy.%kHC
} @ Zgl>
} 3gI[]4lRH
Z?~d']XD
} e:GgA
Id.Z[owC`Y
} rxy{a
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SortUtil： H?`)[#
+F7<5YW&(
package org.rut.util.algorithm; 3?*M{Y|
s*)41\V0
import org.rut.util.algorithm.support.BubbleSort; :<t{ =0G
import org.rut.util.algorithm.support.HeapSort; 8G5)o`
import org.rut.util.algorithm.support.ImprovedMergeSort; Nr]8P/[~
import org.rut.util.algorithm.support.ImprovedQuickSort; )pZekh]v
import org.rut.util.algorithm.support.InsertSort; te\h?H
import org.rut.util.algorithm.support.MergeSort; 7dlKdKH
import org.rut.util.algorithm.support.QuickSort; N7~)qqb
import org.rut.util.algorithm.support.SelectionSort; rZ!Yi*? f
import org.rut.util.algorithm.support.ShellSort; ] [HGzHA
E/dO7I`B
/** g* \P6
* @author treeroot Yt/SnF
* @since 2006-2-2 ,\S pjE
* @version 1.0 0 .FHdJ<
*/ 1~R$$P11[9
public class SortUtil { R*Xu(89
public final static int INSERT = 1; ie$`pyj!x
public final static int BUBBLE = 2; (!0j4'
public final static int SELECTION = 3; kh<pLI>$h
public final static int SHELL = 4; yWv<A^C&
public final static int QUICK = 5; +w k]iH
public final static int IMPROVED_QUICK = 6; 4{*tn"y
public final static int MERGE = 7; |ilv|UV
public final static int IMPROVED_MERGE = 8; XJ:>UNf5;
public final static int HEAP = 9; q4Oxs
7ZV~op2Q
public static void sort(int[] data) { yNrinYw
sort(data, IMPROVED_QUICK); dcl.wD0~V
} e'~-`Z9-)
private static String[] name={ /]/>jz>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [:nx);\
}; >k&8el6h
Q$|^~
private static Sort[] impl=new Sort[]{ R,x>$n
new InsertSort(), GP[6nw_'^
new BubbleSort(), <DeKs?v
new SelectionSort(), Ue{vg$5||
new ShellSort(), Sg.+`xww3
new QuickSort(), }xkLD!
new ImprovedQuickSort(), ?~aZ#%*i8
new MergeSort(), $Wr\[P:
new ImprovedMergeSort(), tLD~
new HeapSort() *t#s$Ga
}; poXLy/K
@%EE0)IA
public static String toString(int algorithm){ XOysgX0g
return name[algorithm-1]; 861i3OXVE>
} Gh]_L+
hncS_ZA
public static void sort(int[] data, int algorithm) { Pv/Pww\
impl[algorithm-1].sort(data); )|w*/JK\Z
} =y<">-
ET,Q3X\Oe
public static interface Sort { y:[BP4H?y
public void sort(int[] data); <#+oQ>5s
} eeW' [
LbJtpwz>z
public static void swap(int[] data, int i, int j) { 0$eyT-:d
int temp = data; ~9JW#HHzn
data = data[j]; |'V DI]p&
data[j] = temp; O!+nF]V4f
} L@{!r=%_>
} )p$\gwr=2