[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; ;2^=#7I?
} dc*#?G6^
int i1=l; UNJ|J$T]
int i2=mid+1; <?eZ9eB
for(int cur=l;cur<=r;cur++){ 4*]`s|fbu
if(i1==mid+1) KT}}=st%
data[cur]=temp[i2++]; X|as1Y$O+
else if(i2>r) BScysoeD
data[cur]=temp[i1++]; 3D3K:K!FK
else if(temp[i1] data[cur]=temp[i1++]; )xU70:X
else G[<iVt$y
data[cur]=temp[i2++]; _]NM@'e
} %pdfGM9g
} WA+v&*]
mtp[]
} @eul~%B{X
. 2WZb_B
改进后的归并排序: Wo%&,>]<H
5m/r,d^H
package org.rut.util.algorithm.support; VrDvd
) Ez=#dIq
import org.rut.util.algorithm.SortUtil; uAJC Q)@
Q"\[ICu!,
/** [69aTl>/
* @author treeroot 2ZnTT{]_m
* @since 2006-2-2 2w%1\TcB$
* @version 1.0 &Jj?C
*/ &p*N8S8
public class ImprovedMergeSort implements SortUtil.Sort { MTQdyTDHl
p 7sYgz
private static final int THRESHOLD = 10; r\yj$Gu>(
(jXgJ" m
/* ?tOzhrv
* (non-Javadoc) ;2$^=:8
* WWY9U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F4@h}T5)
*/ phTZUmi
public void sort(int[] data) { G[jCmkK
int[] temp=new int[data.length]; hFKYRZtP.8
mergeSort(data,temp,0,data.length-1); nBQG.3
} VFyt9:a
6w54+n
private void mergeSort(int[] data, int[] temp, int l, int r) { ,]+6kf5
int i, j, k; y8sI @y6
int mid = (l + r) / 2; <I}k%q'
if (l == r) ?x:\RNB/
return; tFRWxy[5
if ((mid - l) >= THRESHOLD) P5Fm<f8\
mergeSort(data, temp, l, mid); V'_^g7}l&
else /dCZoz~~T
insertSort(data, l, mid - l + 1); UOq$88sr
if ((r - mid) > THRESHOLD) *Owq_)_(|
mergeSort(data, temp, mid + 1, r); UO</4WJ
else K[sfsWQ.
insertSort(data, mid + 1, r - mid); D[<8(~VP
!j- 7,
for (i = l; i <= mid; i++) { >:s:`Au
temp = data; Qf"gH<vT
} [!v:fj
for (j = 1; j <= r - mid; j++) { 3ZC[H'|
temp[r - j + 1] = data[j + mid]; 7;Wj^#
} \jC}>9
int a = temp[l]; 4Vt YR
int b = temp[r]; yNO5h]o
for (i = l, j = r, k = l; k <= r; k++) { Y40{v(Pi
if (a < b) { =oSv=xY
data[k] = temp[i++]; %lvSO/F+
a = temp; hhwV)Z
} else { b-wFnMXk+
data[k] = temp[j--]; D:%v((Ccw
b = temp[j]; (fq>P1-
} zd+8fP/UB
} W8\K_M}
} "8s0~[6S
Pb!kl #
/** 98A ;R
* @param data Zl]\sJ1"
* @param l cU+/I>V
* @param i #Ez>]`]TB
*/ ms<?BgCSz
private void insertSort(int[] data, int start, int len) { ,!c.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8K{ TRPy
} 5pz%DhjLo
} .F9>|Xx[
} D\>CEBt
} S&9{kt|BI
i_V~SC`
堆排序： 55fV\3F|R
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package org.rut.util.algorithm.support; 8JGt|,
)Nk^;[
import org.rut.util.algorithm.SortUtil; MOdodyG
3:!+B=woR
/** \6*3&p
* @author treeroot nx=Zl:Q}
* @since 2006-2-2 3nxJ`W5j
* @version 1.0 Hw_(Af?C
*/ J-hP4t&x
public class HeapSort implements SortUtil.Sort{ T0v;8Ee
u3Ua>A-
/* (non-Javadoc) &+u$96
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x# 0(CcKK
*/ GV* B$
public void sort(int[] data) { G=(F-U;*
MaxHeap h=new MaxHeap(); rj<r6
h.init(data); Kt9:V,
for(int i=0;i h.remove(); ](:aDHa
System.arraycopy(h.queue,1,data,0,data.length); N^B YNqr
} na_Y<R`
}h>QkV,{2
private static class MaxHeap{ ]k5l]JB
8I3"68c_a
void init(int[] data){ jCxw|tmgq
this.queue=new int[data.length+1]; q@H?ohIH
for(int i=0;i queue[++size]=data; 3S ,D~L^
fixUp(size); d0eMDIm3R\
} | x/,
} $Ic: c
l}># p'$
private int size=0; Y;4nIWe JL
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private int[] queue; ,vl][MhM
)EcE{!H6+
public int get() { Ag^Cb'3X
return queue[1]; z`]'~
} JiCDY)bu
Q >] v?4
public void remove() { F`r=M%yh
SortUtil.swap(queue,1,size--); 4#!NVI3t
fixDown(1); 5Z,^46J
} dr'#
file://fixdown d\+smED
private void fixDown(int k) { (g*2OS
int j; .|;`qUo
while ((j = k << 1) <= size) { H[BY(a@c
if (j < size %26amp;%26amp; queue[j] j++; vE^Hk!^
if (queue[k]>queue[j]) file://不用交换 );'8*e'
break; C AVqjT7
SortUtil.swap(queue,j,k); fE8/tx](
k = j; iZyhj%#
} LcI,Dy|P
} 76(-!Z@=J
private void fixUp(int k) { TU&gj1
while (k > 1) { 17 Hdj
int j = k >> 1; 4Bsx[~ u&
if (queue[j]>queue[k]) 8xW_N"P.>
break; Tl6%z9rY@
SortUtil.swap(queue,j,k); FhVi|Va
k = j; "hdcB 0
} e/'d0Gb-
} h/W@R_Y
wz3BtCx
} Ox#%Dm2
^&>(_I\w.6
} "9:1>Gr{G
OB FG!.)
SortUtil： #p_3j 0S
<E[X-S%&
package org.rut.util.algorithm; s~W:N.}*
CA, &R<]
import org.rut.util.algorithm.support.BubbleSort; pn<M`,F~q
import org.rut.util.algorithm.support.HeapSort; x >hnH{~w
import org.rut.util.algorithm.support.ImprovedMergeSort; ep* (
import org.rut.util.algorithm.support.ImprovedQuickSort; r~N0P|Tq
import org.rut.util.algorithm.support.InsertSort; dcew`$SJp
import org.rut.util.algorithm.support.MergeSort; -$yNJ5F`
import org.rut.util.algorithm.support.QuickSort; 8wKF.+_A
import org.rut.util.algorithm.support.SelectionSort; tG+ E'OP
import org.rut.util.algorithm.support.ShellSort; )o-rg
HdQd =q(
/** ~_OtbNj#
* @author treeroot zZE 2%fqM
* @since 2006-2-2 R/&Bze
* @version 1.0 ,{!~rSq-l
*/ Z<T%:F
public class SortUtil { Ke@zS9
public final static int INSERT = 1; #Y6'Q8gf
public final static int BUBBLE = 2; Lwm2:_\_b
public final static int SELECTION = 3; cPZD#";f
public final static int SHELL = 4; Rrmk\7/
public final static int QUICK = 5; $)t ]av
public final static int IMPROVED_QUICK = 6; {p@uH<)
public final static int MERGE = 7; ve;#o<
public final static int IMPROVED_MERGE = 8; a/Z >-
public final static int HEAP = 9; }c?/-ab>
#&a-m,Y$sx
public static void sort(int[] data) { 9&a&O Z{
sort(data, IMPROVED_QUICK); {fW(e?8)
} /X>Fn9mM
private static String[] name={ /2Q@M>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" m08:EXP
}; ?UuJk
cD5c&+,&I
private static Sort[] impl=new Sort[]{ (lBgWz
new InsertSort(), ASME~]]?
new BubbleSort(), c~bi ~ f
new SelectionSort(), tp"dho
new ShellSort(), %QH "x`;
new QuickSort(), qP@d)XRQ
new ImprovedQuickSort(), ^o^[p %
new MergeSort(), r^3/Ltd5/
new ImprovedMergeSort(), 7.@$D;L9
new HeapSort() tCH4-~,#
}; QwPLy O
.4DX/~F
public static String toString(int algorithm){ ~7a(KJgvd"
return name[algorithm-1]; GZXBzZ}
} BBnW0vAZ*
=g|e-XC
public static void sort(int[] data, int algorithm) { zG)XB*c
impl[algorithm-1].sort(data); j}}:&>;
} |eH>55 b
e%.Xya#\
public static interface Sort { Hg$t,\j
public void sort(int[] data); NGZEUtj
} R+,eXjz"
m:U.ao6
public static void swap(int[] data, int i, int j) { gw[\7
int temp = data; `@?f@p$(B
data = data[j]; <,/k"Y=
data[j] = temp; 9ReH@5_bGM
} Sz4G,c
} (s`oJLW>