[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; S.owVMQ
} Lo9 \[4FP
int i1=l; tqU8>d0^
int i2=mid+1; 7{[i)
for(int cur=l;cur<=r;cur++){ KeC&a=HL
if(i1==mid+1) ve*6WDK,H
data[cur]=temp[i2++]; tQ2S*]"f
else if(i2>r) \=@4F^U7`
data[cur]=temp[i1++]; ?zK>[L
else if(temp[i1] data[cur]=temp[i1++]; ;:Y/"5h
else MV?sr[V-oP
data[cur]=temp[i2++]; CyJZip
} uq]E^#^
} /5:qS\Zl
H4e2#]*i7
} z|N*Gs>,
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改进后的归并排序: A~wyn5:_
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package org.rut.util.algorithm.support; l @r`NFWD@
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import org.rut.util.algorithm.SortUtil; 1h?:gOig
MPJ0>Ly
/** K`cy97
* @author treeroot Q".p5(<
* @since 2006-2-2 3T@`VFbE
* @version 1.0 Dzw>[
*/ %VgK::)r
public class ImprovedMergeSort implements SortUtil.Sort { `b[@GGv
Hd~fSXFl
private static final int THRESHOLD = 10; 8EZ,hY^
j(Tk6S
/* boIFN;Aq"
* (non-Javadoc) hmtDw,j
* 1.z !u%2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (FNX>2Mv
*/ [N*`3UZk"
public void sort(int[] data) { O>arCr=H
int[] temp=new int[data.length]; :j% B(@b
mergeSort(data,temp,0,data.length-1); [AAIBb+U
} #0/^v*
Z-z(SKL
private void mergeSort(int[] data, int[] temp, int l, int r) { U{-[lpd
int i, j, k; q&EwD(k
int mid = (l + r) / 2; 'J#uD|9)
if (l == r) -<gQ>`(0
return; 3- 4jSN\
if ((mid - l) >= THRESHOLD) ~bX ) %jC
mergeSort(data, temp, l, mid); Sy34doAZ
else hHqsI`7c
insertSort(data, l, mid - l + 1); ;5}y7#4C
if ((r - mid) > THRESHOLD) \AB*C_Ri
mergeSort(data, temp, mid + 1, r); ZY> u4v.
else '5SO3/{b
insertSort(data, mid + 1, r - mid); %{";RfSVX%
#'h(o/hz&&
for (i = l; i <= mid; i++) { ju;Myi}a
temp = data; lyrwm{&
} K/XUF#^B]
for (j = 1; j <= r - mid; j++) { bR|1*<
temp[r - j + 1] = data[j + mid]; 'd|E>8fejG
} 3})0p
int a = temp[l]; :Nw7!fd
int b = temp[r]; 4 {3< `
for (i = l, j = r, k = l; k <= r; k++) { |:d:uj/
if (a < b) { 5%(xZ 6
data[k] = temp[i++]; ogKd}qTov
a = temp; rZ7)sE5L
} else { =J&aN1Hgt
data[k] = temp[j--]; vpqMKyy
b = temp[j]; Nx4X1j?-n
} &5;y&dh
} X+k`UM~
} l j*J|%~
d9uT*5f
/** aQhr$aH
* @param data AZjj71UE
* @param l cK+y3`.0
* @param i O\qY?)
*/ h\$juIQa
private void insertSort(int[] data, int start, int len) { $ *^E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H!ISQ8{V
} J*CfG;Y:
} wa4(tM2
} f:K`MW
} VNLggeX'U
2wG4"
堆排序： 4 jeUYkJUM
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package org.rut.util.algorithm.support; ]&/KAk
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import org.rut.util.algorithm.SortUtil; 0NWtu]9QC
8q&*tpE
/** Z<0+<tt
* @author treeroot ec` $2u
* @since 2006-2-2 tqo!WuZAj
* @version 1.0 1z[GYRSt
*/ Yl6\}_h`
public class HeapSort implements SortUtil.Sort{ O6pL )6d
xiPP&$mg
/* (non-Javadoc) f@a@R$y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ku}I;k |
*/ hq^@t6!C\m
public void sort(int[] data) { \LS+.bp%
MaxHeap h=new MaxHeap(); nu#_,x<LS
h.init(data); XK5qE"
for(int i=0;i h.remove(); r?=7#/]
System.arraycopy(h.queue,1,data,0,data.length); y3O Nn~k
} B:\TvWbu
KGm"-W
private static class MaxHeap{ *AU"FI>V
a/wkc*}}/
void init(int[] data){ O$=)
this.queue=new int[data.length+1]; zz4A,XrD
for(int i=0;i queue[++size]=data; 61J01(+|
fixUp(size); ZSTpA,+6
} zSiSZMP"
} +$+'|w
emV@kN.
private int size=0; cKX6pG
hFjXgpz5
private int[] queue; yv<0fQ
h?:lO3)TL=
public int get() { q_N8JQg
return queue[1]; ?_F,HhQ
} Ek,s6B)'d
[lC*|4t&
public void remove() { Tdr^~dcQ
SortUtil.swap(queue,1,size--); RkJ\?
fixDown(1); @:. 6'ji,`
} ^J>jU`)CJ
file://fixdown khb Gyg%
private void fixDown(int k) { X~Li`
int j; %Iv0<oU
while ((j = k << 1) <= size) { -< 7KW0CA
if (j < size %26amp;%26amp; queue[j] j++; tp.qh]2c
if (queue[k]>queue[j]) file://不用交换 ,diV;d
break; ud`.}H~aB
SortUtil.swap(queue,j,k); q*ZjOqj
k = j; 1px:(8]{
} 5}R/C{fs
} eP3)8QC
private void fixUp(int k) { )(&g\
while (k > 1) { J|Lk::Ri
int j = k >> 1; $2^V#GWo
if (queue[j]>queue[k]) Z8=4cWI~;
break; &Sc}3UI/F
SortUtil.swap(queue,j,k); 'PlKCn`(w
k = j; (*%+!PS
} 48n>[ FMSR
} J680|\ER
R9yK"
} '8>#`Yba
&,fBg6A%
} ~"5WQK`@
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SortUtil： }d)>pH
cJm!3X
package org.rut.util.algorithm; KTk%Np
<9/oqp{C4
import org.rut.util.algorithm.support.BubbleSort; "0g1'az}
import org.rut.util.algorithm.support.HeapSort; nrA}36E
import org.rut.util.algorithm.support.ImprovedMergeSort; j*$GP'Df3
import org.rut.util.algorithm.support.ImprovedQuickSort; xGqe )M>8?
import org.rut.util.algorithm.support.InsertSort; ''wWw(2O
import org.rut.util.algorithm.support.MergeSort; ?}B9=R$Pi
import org.rut.util.algorithm.support.QuickSort; @-;-DB]j
import org.rut.util.algorithm.support.SelectionSort; v^[Ny0cM
import org.rut.util.algorithm.support.ShellSort; DnaG$a<
5in6Y5ckj
/** `a2Oj@jP
* @author treeroot [/*854
* @since 2006-2-2 ag?@5q3J}
* @version 1.0 (^9q7)n
*/ Vk$zA<sw"
public class SortUtil { /Yx 1S'5
public final static int INSERT = 1; "F|OJ@M
public final static int BUBBLE = 2; *Yvfp{B
public final static int SELECTION = 3; mb?DnP,z
public final static int SHELL = 4; '8k\a{t_z
public final static int QUICK = 5; tB[(o%k
public final static int IMPROVED_QUICK = 6; bK("8T\?
public final static int MERGE = 7; `/]8C&u
public final static int IMPROVED_MERGE = 8; u3 ?+Hu|*T
public final static int HEAP = 9; 4I^6[{_
rP;Fh|w#
public static void sort(int[] data) { ^$_ifkkLz
sort(data, IMPROVED_QUICK); oRy?Dx+H
} Sd^e!?bp
private static String[] name={ 3VA8K@QiRm
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !V@Y \M d
}; f;pR8
-j]r\EVKS
private static Sort[] impl=new Sort[]{ !U,qr0h
new InsertSort(), ahS*YeS7
new BubbleSort(), R`ZU'|
new SelectionSort(), xv7^
new ShellSort(), `Xmf4
new QuickSort(), zG@9-s* L
new ImprovedQuickSort(), KzeA+PI
new MergeSort(), 6l [TQ
new ImprovedMergeSort(), d)r=W@tF]
new HeapSort() TR{8A^XhE8
}; xJ>hN@5}i
lEZ[0oa
public static String toString(int algorithm){ #&r^~>,#L-
return name[algorithm-1]; `W?aq]4x5
} 9qwVBu ;
]v94U b
public static void sort(int[] data, int algorithm) { 1uMnlimr
impl[algorithm-1].sort(data); |mk$W$h
} q'+XTal
vT%rg r
public static interface Sort { I^M3>}p
public void sort(int[] data); s.C-II?e
} =#T6,[5
[:g6gAuh,
public static void swap(int[] data, int i, int j) { >0@X^o
int temp = data; 3{on$\
data = data[j]; .b N0!
data[j] = temp; 1xM&"p:
} qdZn9i
} wc~a}0uz