[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; mbSG
} yRd[$p
int i1=l; \0)v5u
int i2=mid+1; 5~,usA*
for(int cur=l;cur<=r;cur++){ utSW>
if(i1==mid+1) =}F}XSvXH
data[cur]=temp[i2++]; <V} ec1
else if(i2>r) ,,}& Q%5
data[cur]=temp[i1++]; t3P$UR%
else if(temp[i1] data[cur]=temp[i1++]; Qs\m"yx
else GXk]u
data[cur]=temp[i2++]; :'6vIPN5
} ya`Z eQ-p
} $p(
K9\r2w'T'
} ;W~H|M
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改进后的归并排序: $kAal26z
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package org.rut.util.algorithm.support; zG^|W8um_
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import org.rut.util.algorithm.SortUtil; }0okyGg>q
lf`" (:./
/** ^*g= 65!1
* @author treeroot @zs.M-F
* @since 2006-2-2 rS|nO_9f
* @version 1.0 IuV7~w
*/ uW 7Yem&
public class ImprovedMergeSort implements SortUtil.Sort { >f\$~cp
uO^,N**R#
private static final int THRESHOLD = 10; 7T69tQZ<
E'g?44vyw
/* .DrGr:UW
* (non-Javadoc) >;s!X(6b
* u{J\X$]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zg}#X6\G<_
*/ Xd 5vNmQn
public void sort(int[] data) { 'QOV!D
int[] temp=new int[data.length]; rbw~Ml0
mergeSort(data,temp,0,data.length-1); y8.3tp
} k-jlYHsA
o;[cApiQ,2
private void mergeSort(int[] data, int[] temp, int l, int r) { e'dx Y(
int i, j, k; ]H-5
int mid = (l + r) / 2; (F+]h]KSi
if (l == r) zE8qU;
return; |s!<vvp]
if ((mid - l) >= THRESHOLD) {3@"}Eh
mergeSort(data, temp, l, mid); KFhnv`a.0
else j=kz^o~mH
insertSort(data, l, mid - l + 1); ZCAg)/
if ((r - mid) > THRESHOLD) ./qbWr`L
mergeSort(data, temp, mid + 1, r); 7X{@$>+S
else WupONrH1e
insertSort(data, mid + 1, r - mid); $?*XPzZ
Q$^)z_jai
for (i = l; i <= mid; i++) { oK@_
temp = data; v;.w*x8Jw
} ?QRoSQ6
for (j = 1; j <= r - mid; j++) { XjFaP {
temp[r - j + 1] = data[j + mid]; 4(mRLr%l@`
} J;5G]$s
int a = temp[l]; ],|;
int b = temp[r]; f\u5=!kjN
for (i = l, j = r, k = l; k <= r; k++) { MA+{7 [
if (a < b) { nd)`G$gL
data[k] = temp[i++]; jBr3Ay@<
a = temp; .22}=z
} else { 'GF<_3I2l
data[k] = temp[j--]; 3kJ7aBiR<
b = temp[j]; lz:+y/+1
} __Egr@
} gg?O0W{
} LZ4Z]!V
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/** vSv:!5*
* @param data j"Z9}F@
* @param l '>Uip+'
* @param i Hdda/?{b
*/ zlhU[J}"1|
private void insertSort(int[] data, int start, int len) { }>yQ!3/i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 92D :!C
} lEC91:Jyt
} Ih_=yk
} )YPut.
} czcsXBl[
f)#nXTXeC
堆排序： -~TgA*_5]
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package org.rut.util.algorithm.support; MT^krv(G
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import org.rut.util.algorithm.SortUtil; ? oQ_qleuo
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/** nV_[40KP_
* @author treeroot ^$;5ZkQy
* @since 2006-2-2 !=p^@N7
* @version 1.0 .B_a3K4'{^
*/ 115zvW
public class HeapSort implements SortUtil.Sort{ :^J'_
EMw biGV
/* (non-Javadoc) fctVJ{?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t}fU 2Yb
*/ G|LcTV
public void sort(int[] data) { E>&oe&`o'
MaxHeap h=new MaxHeap(); en8l:INX
h.init(data); </li<1
for(int i=0;i h.remove(); l.%[s6
System.arraycopy(h.queue,1,data,0,data.length); 3h4'DQ.g
} >mp"=Y
]cP$aixd
private static class MaxHeap{ G]E-2 _t7
7NP Ny
void init(int[] data){ mApl}I
this.queue=new int[data.length+1]; @YI-@
for(int i=0;i queue[++size]=data; BE,H`G #h
fixUp(size); Nrfj[I
} _<7e5VR
} A08{]E#v>
L=)Arj@q
private int size=0; X0BBJ(e
R zn%!d^$>
private int[] queue; !^IAn
x`Ik747^v
public int get() { o]WG8Mo-
return queue[1]; X@^"@
} 7rjS.
VN >X/
public void remove() { Z:Nm9m
SortUtil.swap(queue,1,size--); k(R&`
fixDown(1); 3sz?49tX
} i1-wzI
file://fixdown $&to(
private void fixDown(int k) { }x+s5a;!3/
int j; "dFuQB
while ((j = k << 1) <= size) { ]7 2wv#-
if (j < size %26amp;%26amp; queue[j] j++; hC2_Yr>N%
if (queue[k]>queue[j]) file://不用交换 RrRE$g
break; =Y<RG"]a&J
SortUtil.swap(queue,j,k); nhI1`l&
k = j; UO8./%'
} [|dQZ
} .Eg[[K_iD
private void fixUp(int k) { &/{x7;e
while (k > 1) { 1ZRSeh
int j = k >> 1; ['\u?m
if (queue[j]>queue[k]) {U7A&e0eW
break; mqKr+
SortUtil.swap(queue,j,k); ZfSAXr "(
k = j; z|WDqB%/I
} Nh+ZSV4WJ:
} .>+jtp}
p WLFJH}N
} UkgiSv+
'`/w%OEVC5
} O>Ao#_*hOb
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SortUtil： 3`>nQ4zC
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package org.rut.util.algorithm; XE.Y?{,R$
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import org.rut.util.algorithm.support.BubbleSort; \ 0aa0=
import org.rut.util.algorithm.support.HeapSort; Q\{$&0McF
import org.rut.util.algorithm.support.ImprovedMergeSort; `'}c- Q
import org.rut.util.algorithm.support.ImprovedQuickSort; +,A7XBn
import org.rut.util.algorithm.support.InsertSort; ~4C:2
import org.rut.util.algorithm.support.MergeSort; bT#re
import org.rut.util.algorithm.support.QuickSort; X8| 0RU@f
import org.rut.util.algorithm.support.SelectionSort; D?@e,e
import org.rut.util.algorithm.support.ShellSort; @g==U{k;t
7 J+cs^2
/** 2` j#eB1
* @author treeroot ,]8$QFf
* @since 2006-2-2 Q(7M_2e7
* @version 1.0 )ZQML0}P;
*/ [;8vO=Z
public class SortUtil { D_-<V,3t
public final static int INSERT = 1; O"~BnA`dJ
public final static int BUBBLE = 2; mZb[Fi
public final static int SELECTION = 3; z\r|5Z
public final static int SHELL = 4; *u?N{LkqS
public final static int QUICK = 5; [I4&E >
public final static int IMPROVED_QUICK = 6; c&u~M=EW
public final static int MERGE = 7; J<=k [Q
public final static int IMPROVED_MERGE = 8; iJem9XXb
public final static int HEAP = 9; ;'xd8Jf
=EdLffU[J
public static void sort(int[] data) { v %GcNjZk5
sort(data, IMPROVED_QUICK); wC4:OJ[d
} &W:R#/|
private static String[] name={ ;,Q6AS!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /;\{zA$uC=
}; YMTB4|{
*m9,_~t
private static Sort[] impl=new Sort[]{ 6d# V
new InsertSort(), (v$$`zh
new BubbleSort(), 1pHt3Vc(G
new SelectionSort(), >5+]~[S
new ShellSort(), &0QtHcXpR
new QuickSort(), ^VAvQ(b!:i
new ImprovedQuickSort(), gyAKjLqqpi
new MergeSort(), FQGh+.U
new ImprovedMergeSort(), ]eD5It\
new HeapSort() L#X!.
}; V=DT.u
)3RbD#?
public static String toString(int algorithm){ >Vvjs
return name[algorithm-1]; L fx$M
} K3($,aB}
)Y:9sd8g7
public static void sort(int[] data, int algorithm) { r%^J3
impl[algorithm-1].sort(data); @[(<oX%
} "f-z3kL
2h^9lrQcQG
public static interface Sort { I]OVzM
public void sort(int[] data); E]26a,^L
} b+qdl`Vd
A-XWG9nL
public static void swap(int[] data, int i, int j) { \4r?=5v*
int temp = data; X`E3lgfqT
data = data[j]; 8!q$8]M
data[j] = temp; .<|.nK`6
} 9Di@r!Db
} &*r'Sx)V