[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; K7[AiU_I
} y5AXL5
int i1=l; +%le/Pg@
int i2=mid+1; &t*8oNwSs
for(int cur=l;cur<=r;cur++){ TH(Lzrbg
if(i1==mid+1) Z*vpQBbu
data[cur]=temp[i2++]; +Sdx8 Z5
else if(i2>r) |<$<L`xoe
data[cur]=temp[i1++]; O2'bNR
else if(temp[i1] data[cur]=temp[i1++]; k}f<'g<H
else VNxpOoV=S
data[cur]=temp[i2++]; A"bSNHCKF
} ]2xx+P#Y
} hV>4D&<
@cS1w'=
} k qY3r &
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改进后的归并排序: z"s%#/#
AK~`pq[.
package org.rut.util.algorithm.support; SP D207
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import org.rut.util.algorithm.SortUtil; .cH{WZ
WK_y1(v>
/** Oj4u!SY\j
* @author treeroot Dc&9emKI
* @since 2006-2-2 _r<zSH%
* @version 1.0 _,Rsl$Tk'
*/ rKy-u
public class ImprovedMergeSort implements SortUtil.Sort { V$-~%7@>;9
G1?0Q_RN
private static final int THRESHOLD = 10; I4o=6ts
,>QMyI hv
/* N)vk0IM!
* (non-Javadoc) }o!#_N0T
* Xew1LPI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) * Y%<b86U
*/ XYK1-m}2
public void sort(int[] data) { rt3f7 s*
int[] temp=new int[data.length]; f- k|w%R@
mergeSort(data,temp,0,data.length-1); { /F rs*AF
} #4P3xa
?2?S[\@`0U
private void mergeSort(int[] data, int[] temp, int l, int r) { T<TcV9vM
int i, j, k; H4}%;m%
int mid = (l + r) / 2; O ':0V
if (l == r) uXG`6|?
return; 9k=U0]!ch
if ((mid - l) >= THRESHOLD) n2xLgK=
mergeSort(data, temp, l, mid); &*G5J7%w
else |b$>68:
insertSort(data, l, mid - l + 1); tp6csS,
if ((r - mid) > THRESHOLD) Z{,GZT
mergeSort(data, temp, mid + 1, r); S1 EEASr!}
else n) _dH/"
insertSort(data, mid + 1, r - mid); tb:,Uf>E
)h>\05|T
for (i = l; i <= mid; i++) { (B_7\}v|_
temp = data; u0bfX,e2U
} &dhcKO<4
for (j = 1; j <= r - mid; j++) { :jt;EzCLg%
temp[r - j + 1] = data[j + mid]; 93W
} T~i%j@Q.6
int a = temp[l]; KA5~">l
int b = temp[r]; :]CzN^k(1c
for (i = l, j = r, k = l; k <= r; k++) { [%j?.N
if (a < b) { >63)z I
data[k] = temp[i++]; <*s"e)XeqF
a = temp; Q0zW ]a
} else { z-EwXE
data[k] = temp[j--]; B ~fSMB6h
b = temp[j]; csH2_+uG
} ?muDTD%c
} di6B!YQP
} Awu$g.
S~@r
/** {]wIM^$6+
* @param data ~7dM!g{W
* @param l G'ij?^?
* @param i R)0N0gH
*/ \~JNQ&_o
private void insertSort(int[] data, int start, int len) { +h0PR?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s kN9O"^A
} :ozV3`%$(
} Q~Ay8L+
} "$XYIuT
} 2v0!` &?M{
~I{EE[F>qL
堆排序： ^4c,U9J=
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package org.rut.util.algorithm.support; e^j<jV`1
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import org.rut.util.algorithm.SortUtil; bGbqfO`
2t+D8 d|c<
/** Fi mN?s
* @author treeroot nz4<pvC,*
* @since 2006-2-2 *IC^IC:
* @version 1.0 A_!QrM
*/ O0^?f/&k
public class HeapSort implements SortUtil.Sort{ `/#f?Hk=
WfTD7?\dw
/* (non-Javadoc) 10p8|9rE}B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yn SBVb!)
*/ )uZoH8?
public void sort(int[] data) { # ;K,,ku x
MaxHeap h=new MaxHeap(); `E@kFJ(<On
h.init(data); =M7TCE
for(int i=0;i h.remove(); EXuLSzQwv
System.arraycopy(h.queue,1,data,0,data.length); MkwU<ae AB
} D^Te%qnW
w/ TKRCO3
private static class MaxHeap{ LO)GTyzvJ
{Fbg]'FQ
void init(int[] data){ ]eE 1n2
this.queue=new int[data.length+1]; ]kx-,M(
for(int i=0;i queue[++size]=data; ?hnx/z+uT
fixUp(size); 3gAR4
} xq}-m!nX
} $9K(F~/
pz{'1\_+9
private int size=0; )zU:
]*qU+&
private int[] queue; axmsrjW#
7paUpQit
public int get() { $.pTB(tO
return queue[1]; NmJ`?-Z
} OTj,O77k
I,b9t\(6
public void remove() { ?v:ZU~i
SortUtil.swap(queue,1,size--); IV'p~t
fixDown(1); c!It^*
} YTK^ijmU6x
file://fixdown qj&bo
private void fixDown(int k) { .20V 3
int j; &)n_]R#)
while ((j = k << 1) <= size) { \R(R9cry
if (j < size %26amp;%26amp; queue[j] j++; w/W7N
if (queue[k]>queue[j]) file://不用交换 8nCp\0
break; )0^>#k
SortUtil.swap(queue,j,k); i31<].|kA*
k = j; `H>b5
} gxwo4.,
} ,MQVE
private void fixUp(int k) { Oe51PEqn
while (k > 1) { RT^v:paNT2
int j = k >> 1; 9Hd;353Q
if (queue[j]>queue[k]) !;S"&mcPDJ
break; .[?BlIlm
SortUtil.swap(queue,j,k); R_^/,^1
k = j; qz!Ph5(
} ]dSK wxk
} p~&BChBl!=
SRZL\m}
} 5u r)uz]w8
UZGDdP
} }g|nz8
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SortUtil： Tkw;pb
LH2PTW\b!6
package org.rut.util.algorithm; }u%"$[I}
sYqgXE.
import org.rut.util.algorithm.support.BubbleSort; y500Xs[c
import org.rut.util.algorithm.support.HeapSort; i0:>Nk
import org.rut.util.algorithm.support.ImprovedMergeSort; :]PM_V|
import org.rut.util.algorithm.support.ImprovedQuickSort; Dw_D+7>(v
import org.rut.util.algorithm.support.InsertSort; +f>cxA
import org.rut.util.algorithm.support.MergeSort; ]5' d&f
import org.rut.util.algorithm.support.QuickSort; ye%iDdf
import org.rut.util.algorithm.support.SelectionSort; _OMpIdY,R*
import org.rut.util.algorithm.support.ShellSort; TW7:q83{l
Z o=]dBp.
/** 1D F/6y
* @author treeroot >xqM5#m`E$
* @since 2006-2-2 (gwj)?:
* @version 1.0 "0CjP+1k
*/ V5mlJml2(
public class SortUtil { e$e#NoN
public final static int INSERT = 1; ";x+1R.d
public final static int BUBBLE = 2; tnz+bX26
public final static int SELECTION = 3; Ub_4yN;
public final static int SHELL = 4; e)H!uR
public final static int QUICK = 5; -)jax
public final static int IMPROVED_QUICK = 6; c>HK9z{
public final static int MERGE = 7; \,&9
public final static int IMPROVED_MERGE = 8; Pf<[|yu4?
public final static int HEAP = 9; oH#v6{y
Pm+tQ
public static void sort(int[] data) { kM/Te{<
sort(data, IMPROVED_QUICK); EpYy3^5d
} 3QXjD/h
private static String[] name={ [q*%U4qGO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" JWv{=_2w
}; 6/Fzco#N
R"AUSO|{
private static Sort[] impl=new Sort[]{ 52d^K0STC
new InsertSort(), C[uOReo
new BubbleSort(), ka"337H
new SelectionSort(), ~rD={&0
new ShellSort(), 8X$LC
new QuickSort(), k|YWOy@D~
new ImprovedQuickSort(), yClx` S(
new MergeSort(), 9Q;c,]
new ImprovedMergeSort(), .]x2K-Sf
new HeapSort() d$W
}; -%CoWcGP
;eL9{eF
public static String toString(int algorithm){ )IL #>2n?
return name[algorithm-1]; EW<kI+0D
} ObG|o1b
A"v{~
public static void sort(int[] data, int algorithm) { Q=uRKh
impl[algorithm-1].sort(data); /9pM>Cd*Z
} ln!'_\{
I$t3qd{H&
public static interface Sort { _>m-AI4^
public void sort(int[] data); 44ed79ly0)
} 5O/i3m26
I1Sa^7
public static void swap(int[] data, int i, int j) { %+)o'nf"U
int temp = data; @}-r&/#
data = data[j]; ->^~KVh&
data[j] = temp; N|g;W
} )~J>X{hy
} kq=V4-a[