[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; j+dQI_']x
} {98e_z w
int i1=l; 8D@Jd
int i2=mid+1; bYpeI(zK
for(int cur=l;cur<=r;cur++){ L^Q;M,.c;
if(i1==mid+1) PJ?C[+&
data[cur]=temp[i2++]; TF!v,cX
else if(i2>r) f[R~oc5P0
data[cur]=temp[i1++]; 5D<ZtsXE
else if(temp[i1] data[cur]=temp[i1++]; zkqn>
else -I6t ^$HA
data[cur]=temp[i2++]; _Yp~Oj
} |& jrU-(
} z$d<ep{6
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} h6?Z
%\|{_]h}y
改进后的归并排序: f)a0!U 44
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package org.rut.util.algorithm.support; AOKC1iD%Y
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import org.rut.util.algorithm.SortUtil; RP+)sCh
uM,Ps}
/** ZvT>A#R;l~
* @author treeroot P,3w b
* @since 2006-2-2 goF87^M
* @version 1.0 L@zhbWY
*/ dkDPze9l
public class ImprovedMergeSort implements SortUtil.Sort { `F&~SU,
bX:h"6{=R
private static final int THRESHOLD = 10; 6@8z3JW.A
z5~W >r
/* FY^Nn
* (non-Javadoc) dVHbIx
* I_->vC|>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kcg\f@d$
*/ v*dw'i
public void sort(int[] data) { s/C'f4
int[] temp=new int[data.length]; <LXx_{=:
mergeSort(data,temp,0,data.length-1); NW 2`)e'
} m_Q&zp["
c>>.>^5
private void mergeSort(int[] data, int[] temp, int l, int r) { GQCdB>
int i, j, k; #)]t4wa_W
int mid = (l + r) / 2; T{f$S
if (l == r) +`{OOp=
return; fG$LqzyqlK
if ((mid - l) >= THRESHOLD) (1GU
mergeSort(data, temp, l, mid); gM=:80
else DU]KD%kl
insertSort(data, l, mid - l + 1); 4G&dBH
if ((r - mid) > THRESHOLD) c>^(=52Q
mergeSort(data, temp, mid + 1, r); vxI9|i
else i 61k
insertSort(data, mid + 1, r - mid); ,R<9yEWm
{$yju_[
for (i = l; i <= mid; i++) { &g^*ep~|#
temp = data; +FqE fY4j
} m}=E$zPbO
for (j = 1; j <= r - mid; j++) { y*-_
temp[r - j + 1] = data[j + mid]; 2@GizT*mA
} |b.xG_-s1
int a = temp[l]; -,p=;t#(
int b = temp[r]; <EN9s
for (i = l, j = r, k = l; k <= r; k++) { {A:uy
if (a < b) { !%('8-x%
data[k] = temp[i++]; hp9U
a = temp; DHw)]WB M
} else { 1nskf*Z
data[k] = temp[j--]; GjHR.p?-
b = temp[j]; u YT$$'S
} (A6~mi r!
} l&qCgw
} 9N}\>L)_
uij^tN%
/** Kmx^\vDs
* @param data Y`bTf@EP>
* @param l ~S\L(B(
* @param i "W(Ae="60
*/ k_0@,b3
private void insertSort(int[] data, int start, int len) { ~:bdS 4w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }A24;'}
} \?^2}K/
} }a6t<m`V
} F1L[3D^-
} ~RuX2u-2&u
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堆排序： E3wL n/<
!ou#g5Q@z
package org.rut.util.algorithm.support; A:r?#7 Ma
J}X{8Ds9
import org.rut.util.algorithm.SortUtil; 6- i.*!I 8
gtA34iw
/** +ZOiL[rS
* @author treeroot 3Hom0g,V4
* @since 2006-2-2 qMNWw\k
* @version 1.0 :V)jm`)#+
*/ ;X,u
public class HeapSort implements SortUtil.Sort{ Z,38eQpM
ns8s2kYcm
/* (non-Javadoc) P#~B@d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FoyYWj?,R
*/ EE!}$qOR
public void sort(int[] data) { EX`P(=zD
MaxHeap h=new MaxHeap(); `R[ZY!=+
h.init(data); lZ\8W^
for(int i=0;i h.remove(); oY18a*_>M1
System.arraycopy(h.queue,1,data,0,data.length); Z nc(Q
} ijF_ KP'
a[O6xA%
private static class MaxHeap{ ?0VR2Yb${b
7w/IHML
void init(int[] data){ %T{]l;5
this.queue=new int[data.length+1]; I9*cEZ!l=e
for(int i=0;i queue[++size]=data; fSuykbZ
fixUp(size); @Iv;y*y
} DYD<?._I
} `a& kD|Yh
\n)',4mY
private int size=0; &r5q,l&@n
+T+@g8S
private int[] queue; @!#e\tx
n{;j
public int get() { KQdIG9O+6
return queue[1]; e`D}[G#
} /8cRPB.
o%$.8)B9F
public void remove() { ,BU;i%G&s
SortUtil.swap(queue,1,size--); SiratkP9n7
fixDown(1); ,^#Jw`w^
} NK_|h%
file://fixdown \c=I!<9
private void fixDown(int k) { V2YK T,5
int j; :]^e-p!z
while ((j = k << 1) <= size) { k9^Hmhjw
if (j < size %26amp;%26amp; queue[j] j++; 7RAB"T;?Q
if (queue[k]>queue[j]) file://不用交换 |\5^ub,m
break; E7fx4kV
SortUtil.swap(queue,j,k); ~Iu!B Y
k = j; *T|B'80
} `2s!%/
} 1uw#;3<L
private void fixUp(int k) { La26"C"X
while (k > 1) { +L(amq;S
int j = k >> 1; [VCC+_
if (queue[j]>queue[k]) a&y^Ps6=
break; D6sw"V#
SortUtil.swap(queue,j,k); ^.SYAwL
k = j; o`?rj!\
} tT$OnZu&
} +]db-
2ej7Ql_@c
} qS!r<'F3dP
5Wt){rG0Z
} yzA05npTl
XH:*J+$O
SortUtil： R$awgSE
S:\i M:
package org.rut.util.algorithm; JE?p'77C
h6 \P&Z
import org.rut.util.algorithm.support.BubbleSort; ) nfoDG#O
import org.rut.util.algorithm.support.HeapSort; hGRj
import org.rut.util.algorithm.support.ImprovedMergeSort; v0^9"V:y
import org.rut.util.algorithm.support.ImprovedQuickSort; N0U/u'J!g
import org.rut.util.algorithm.support.InsertSort; S)rZE*~2
import org.rut.util.algorithm.support.MergeSort; E-MPFL
import org.rut.util.algorithm.support.QuickSort; |m19fg3u
import org.rut.util.algorithm.support.SelectionSort; ;|N:FG
import org.rut.util.algorithm.support.ShellSort; h$>F}n j
[}X|&`'i
/** G4&s_M$
* @author treeroot 3P>gDQP
* @since 2006-2-2 5/48w-fnZ
* @version 1.0 A5?"
*/ q^@*{H
public class SortUtil { gwZ<$6
public final static int INSERT = 1; &dtk&P{
public final static int BUBBLE = 2; aD/Rr3v>
public final static int SELECTION = 3; ;?6vKpj;
public final static int SHELL = 4; 5:Qz
public final static int QUICK = 5; gU9{~-9}
public final static int IMPROVED_QUICK = 6; r@r%qkh(.@
public final static int MERGE = 7; kH!Z|Ps?R
public final static int IMPROVED_MERGE = 8; p:,Y6[gMo
public final static int HEAP = 9; vG&>-Z
:dmE/Tq
public static void sort(int[] data) { k<1yv$/mW
sort(data, IMPROVED_QUICK); ,m=F H?5
} |J`EM7qMK
private static String[] name={ ]`o5eByo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \}-4(Xdaq
}; +,Dc0VC?
#kg`rrFr
private static Sort[] impl=new Sort[]{ 1CtUf7 `/Q
new InsertSort(), e r" w{
new BubbleSort(), fBO/0uW
new SelectionSort(), mDD.D3RS
new ShellSort(), 6*8Wtq
new QuickSort(), gW,[X(
new ImprovedQuickSort(), \j)Evjw
new MergeSort(), #mH@ /6,#[
new ImprovedMergeSort(), &K[*vyD
new HeapSort() 337.' |ZE
}; 3WV(Ok
!U`&a=k
public static String toString(int algorithm){ K2m>D=w
return name[algorithm-1]; M8^ID #
} ,"qCz[aDN1
EIi<g2pM(
public static void sort(int[] data, int algorithm) { gv!8' DKn
impl[algorithm-1].sort(data); [hJ1]RW8
} \u=d`}E
;i{B,!#
public static interface Sort { ,5'o>Y
public void sort(int[] data); M!mL/*G@YE
} J,a&"eOZ
68%aDs
public static void swap(int[] data, int i, int j) { @uSO~.7
int temp = data; ^[ae )}
data = data[j]; gqaM<!]
data[j] = temp; HC0juT OiO
} sA0Ho6
} UhB+c