[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; !L5[s
} ("HT0&#a
int i1=l; 4.@gV/U(|
int i2=mid+1; I^'U_"vB
for(int cur=l;cur<=r;cur++){ >we/#C"x
if(i1==mid+1) 8p3pw=p
data[cur]=temp[i2++]; 8!e1T,:b
else if(i2>r) =l&A9 >\
data[cur]=temp[i1++]; tF> ?]
else if(temp[i1] data[cur]=temp[i1++]; W/Rb7q4v
else 6.fahg?E
data[cur]=temp[i2++]; +{* @36A5A
} Q=hf,/N
} Mq7d*Bgb
[;5?=X,LD
} e[D'0L
U?dd+2^};t
改进后的归并排序: adEcIvN$
0Me*X
package org.rut.util.algorithm.support; 9p,<<5{
v&CKtk!3{
import org.rut.util.algorithm.SortUtil; w`~j(G4N
lZ^UAFF
/** Rb_HD
* @author treeroot Epm'u[wV
* @since 2006-2-2 neC]\B[Xm
* @version 1.0 e<|'
*/ S9Kay'.aJ(
public class ImprovedMergeSort implements SortUtil.Sort { dm4dT59
,$ICv+7]
private static final int THRESHOLD = 10; <{\UE~
^%|(dMo4
/* !?Tu pi
* (non-Javadoc) n1Ag o3NM
* ii%n:0+zm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v5i?4?-Z
*/ E|f&SEnzK
public void sort(int[] data) { a8fLj
int[] temp=new int[data.length]; 1zE_ SNx
mergeSort(data,temp,0,data.length-1); VN=S&iBa/
} WZ"g:Khw
|qra.\
private void mergeSort(int[] data, int[] temp, int l, int r) { IyE9G:fY
int i, j, k; $;<h<#_n;
int mid = (l + r) / 2; ; *G[3kk
if (l == r) *GsrG*OM*D
return; XK:KWqW
if ((mid - l) >= THRESHOLD) 2fc8w3
mergeSort(data, temp, l, mid); wzAp`Zs2Dm
else 7S<Z&1(
insertSort(data, l, mid - l + 1); ?3tR(H<
if ((r - mid) > THRESHOLD) A/NwM1z[o)
mergeSort(data, temp, mid + 1, r); "yMr\jt~-
else 6"Tr$E
insertSort(data, mid + 1, r - mid); p-U'5<n
Xg#g`m%(M
for (i = l; i <= mid; i++) { ~mUP!f
temp = data; |L{<=NNs:D
} GXaCH))TO
for (j = 1; j <= r - mid; j++) { B^(0>Da\
temp[r - j + 1] = data[j + mid]; D]+tr%
} Py(l+Ik`>
int a = temp[l]; ;D_6u(IC4:
int b = temp[r]; m{gK<T
for (i = l, j = r, k = l; k <= r; k++) { O2{_:B>K[
if (a < b) { YW"?Fy
data[k] = temp[i++]; o?P(Fuf
a = temp; "42u0rH0J
} else { d>F=|dakL
data[k] = temp[j--]; ff"Clp
b = temp[j]; zqAK|jbL
} ;2RCgX!'%
} (E)/' sEb
} Xmy(pV!PF
]4@z.1Mr
/** Dbr(Wg
* @param data yS/ovd
* @param l T8YqCT"EA<
* @param i ,)+O.Lf7&.
*/ j#%*@]>Tg
private void insertSort(int[] data, int start, int len) { g#=^U`y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); R{.wAH(
} Ki-CJy
} z$p+l]
} =Feavyx
} nM8aC&Rd\
De|@}@
堆排序： PpN+q:(
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package org.rut.util.algorithm.support; ox {Cm
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import org.rut.util.algorithm.SortUtil; 3 Yl[J;i
=_cWCl^5
/** Pw /wAUt
* @author treeroot iZ[o2Tre
* @since 2006-2-2 ,%dn)gt7
* @version 1.0 ;BoeE3* 6
*/ y)U8\
public class HeapSort implements SortUtil.Sort{ O3*Vilx
-tx)7KV-
/* (non-Javadoc) qd3B>f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C%#C|X193
*/ XuHJy
public void sort(int[] data) { n*D)RiW
MaxHeap h=new MaxHeap(); Uk ?V7?&
h.init(data); LnZz=
for(int i=0;i h.remove(); ~;m~)D
System.arraycopy(h.queue,1,data,0,data.length); W5:S+
} _?Jm.nT
!0`ZK-nA6
private static class MaxHeap{ NLb/Bja
D'O[0?N"g
void init(int[] data){ z[qM2
this.queue=new int[data.length+1]; hFa\x5I5
for(int i=0;i queue[++size]=data; @]*z!>1
fixUp(size); 0e8)*2S
} m{Q{ qJ5>
} 6?}8z q[
R|NmkqTK~(
private int size=0; bz H5Lc{%
OAw/
private int[] queue; Q*$x!q
TQ@*eoJj
public int get() { lKIHBi
return queue[1]; 9 J5Z'd_
} =sG(l
2T?t[;-
public void remove() { u[2R>=
SortUtil.swap(queue,1,size--); 5 +(YcV("
fixDown(1); v-G(bw3
} X+iA"B
file://fixdown f$V']dOj1q
private void fixDown(int k) { {br4B7b
int j; =]W{u`
while ((j = k << 1) <= size) { 94nvh:n
if (j < size %26amp;%26amp; queue[j] j++; m!;mEBL{
if (queue[k]>queue[j]) file://不用交换 @ n;WVG
break; ~n"V0!:'4
SortUtil.swap(queue,j,k); IRo[|&c
k = j; 0]>p|m9K^<
} V^L;Nw5h
} HdWghxz?)
private void fixUp(int k) { =#%e'\)a
while (k > 1) { #3u8BLy$Q
int j = k >> 1; =K8`[iH
if (queue[j]>queue[k]) Q1eiU Y6
break; |7%$+g
SortUtil.swap(queue,j,k); WHAEB1c#Q
k = j; 7\{<AM?*
} {!oO>t
} Y]8l]l 1
{2Gp+&
} 9lTA/-
7Oxvq^[
} (2qo9j"j/Y
D"1ciO8^I]
SortUtil： ]]%C\Ryy}
0TA/ExJ-LT
package org.rut.util.algorithm; nsgNIE{>gO
Vp5qul%
import org.rut.util.algorithm.support.BubbleSort; I8^z\ef&
import org.rut.util.algorithm.support.HeapSort; j-{WPJa4\
import org.rut.util.algorithm.support.ImprovedMergeSort; T/S-}|fhQ
import org.rut.util.algorithm.support.ImprovedQuickSort; ,u]kZ]
import org.rut.util.algorithm.support.InsertSort; J_P2%b=C
import org.rut.util.algorithm.support.MergeSort; 4TR:bQZs
import org.rut.util.algorithm.support.QuickSort; 6dq U4
import org.rut.util.algorithm.support.SelectionSort; )sNtwSl^
import org.rut.util.algorithm.support.ShellSort; 3wR5:O$H
hDp'=}85@
/** N;[w`d'#
* @author treeroot +}9%Duim
* @since 2006-2-2 yxA0#6so
* @version 1.0 5@ZD'
*/ yDd&*;9%Qg
public class SortUtil { Pi*,&D>{7
public final static int INSERT = 1; b:%>TPT
public final static int BUBBLE = 2; /h2`?~k+
public final static int SELECTION = 3; $/wr?
public final static int SHELL = 4; `hH1rw@7<
public final static int QUICK = 5; =}c~BHT
public final static int IMPROVED_QUICK = 6; SKG_P)TnO
public final static int MERGE = 7; 7%w4?Nv3I
public final static int IMPROVED_MERGE = 8; m?B@VDZ
public final static int HEAP = 9; pbm4C0W}
j<L!ONvJ1
public static void sort(int[] data) { K{|;'N-1
sort(data, IMPROVED_QUICK); Q_uv.\*z_
} kP;Rts8JD
private static String[] name={ z5Nw+#m| i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D]oS R7h
}; 54}s:[O
'm/b+9?.
private static Sort[] impl=new Sort[]{ g]d"d
new InsertSort(), +U6! bu>C
new BubbleSort(), TD3R/NP
new SelectionSort(), qvk?5#B
new ShellSort(), {I2jLc
new QuickSort(), kc"U)>
new ImprovedQuickSort(), PiH#9XB
new MergeSort(), [|F.*06SK
new ImprovedMergeSort(), ! B)Em
new HeapSort() vB.LbYyF
}; Qgf_
ied<1[~S
public static String toString(int algorithm){ R`$Odplh>
return name[algorithm-1]; HDy[/7"
} VNytK_F0P
:wn![<`3q
public static void sort(int[] data, int algorithm) { e dD(s5
impl[algorithm-1].sort(data); TS1k'<c?
} d;CD~s
Z)?"pBv'
public static interface Sort { AMO{?:8Y;
public void sort(int[] data); pCg0xbc`
} zSq+#O1#
j f^fj-
public static void swap(int[] data, int i, int j) { !Sw7!h.ut
int temp = data; f'%}{l: ss
data = data[j]; `,7BU??+u
data[j] = temp; +F0M?,
} 8H{@0_M
} m$O@+;>l