[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; T@#?{eA
} 8*{jxN'M
int i1=l; h<$%y(lP
int i2=mid+1; N`fFYO
for(int cur=l;cur<=r;cur++){ 0L#i c61U
if(i1==mid+1) QLHEzEvf{/
data[cur]=temp[i2++]; <n~.X<6V'
else if(i2>r) P0hr=/h4
data[cur]=temp[i1++]; *kTp(*K/7`
else if(temp[i1] data[cur]=temp[i1++]; ~7g$TAe{
else 8Exky^OT|
data[cur]=temp[i2++]; F|.tn`j]U
} y x#ub-A8
} r%X M`;bQX
W7_m,{q
} Xc" %-
=OPX9oG
改进后的归并排序: `Eu,SvkFw
kv+^U^WoU
package org.rut.util.algorithm.support; Lw(tO0b2H
%0}}Qt
import org.rut.util.algorithm.SortUtil; 2DJg__("
/Lm~GmPt
/** cVO-iPK
* @author treeroot [cznhIvyO
* @since 2006-2-2 K{@xZ)
* @version 1.0 @o'L!5Y
*/ 83'+q((<
public class ImprovedMergeSort implements SortUtil.Sort { {+d)M
3ZyvX]@_
private static final int THRESHOLD = 10; g`C8ouy
c9CFGo?)N
/* .;ofRx<
* (non-Javadoc) jJt4{c
* CH|cK8q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5M5vxJ)Lh
*/ |/%5~=%7
public void sort(int[] data) { fB,eeT1v?h
int[] temp=new int[data.length]; $ywROa]
mergeSort(data,temp,0,data.length-1); 9b,0_IMHH
} 8tna<Hx
xWK/uE(
private void mergeSort(int[] data, int[] temp, int l, int r) { ~ QohP`_
int i, j, k; g&EK^q
int mid = (l + r) / 2; Y{#*;p*I
if (l == r) +(afO~9
return; S+wT}_BQ
if ((mid - l) >= THRESHOLD) ~%M*@fm
mergeSort(data, temp, l, mid); dw5"}-D
else )uR_d=B&
insertSort(data, l, mid - l + 1); +c C. ZOS
if ((r - mid) > THRESHOLD) WwtVuc|
mergeSort(data, temp, mid + 1, r); wpi$-i`
else P6ktA-Hv>
insertSort(data, mid + 1, r - mid); f5un7,m
|_7k*:#q:
for (i = l; i <= mid; i++) { :&:P4Y1 E
temp = data; 'wMvO{}$
} $o\z4_I
for (j = 1; j <= r - mid; j++) { y&O?`"Uv/M
temp[r - j + 1] = data[j + mid]; G{>PYLxOb
} e"bzZ!c&~V
int a = temp[l]; L$sENOm
int b = temp[r]; ) )FLM^dj
for (i = l, j = r, k = l; k <= r; k++) { J-uQF|
if (a < b) { |s(Ih_Zn
data[k] = temp[i++]; l`A&LQ[
a = temp; 4E2/?3D
} else { |mbD q\U
data[k] = temp[j--]; /N<aN9Z<x,
b = temp[j]; enQW;N1_M
} a8ouk7G
} 6oZHSjC*
} ]o0]i<:
WvfM.D!
/** cS:O|R#%t
* @param data UpE+WzY
* @param l }' Y)"8AIA
* @param i v'Ehr**]+
*/ e?B}^Dk0i
private void insertSort(int[] data, int start, int len) { C8T0=o/-`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); p8@&(+z
} J` gG`?
} V rx,'/IS8
} [{GN#W|AGP
} SDE$ymPx
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堆排序： |>'N^
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package org.rut.util.algorithm.support; |K{d5\_
c?. i;4yh
import org.rut.util.algorithm.SortUtil; w%X@os}E
4pQf*l8e
/** j|&D(]W/
* @author treeroot 5G(dvM-n
* @since 2006-2-2 Yo'Y-h#
* @version 1.0 p=E#!cn3
*/ C#yRop_d]o
public class HeapSort implements SortUtil.Sort{ FBB<1({A
G}+@C]
/* (non-Javadoc) {I$iD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hwL`9.w
*/ Z2})n -
public void sort(int[] data) { u7RlxA:
MaxHeap h=new MaxHeap(); sP2Uj
h.init(data); ){'<67dK
for(int i=0;i h.remove(); /d:hW4}<}.
System.arraycopy(h.queue,1,data,0,data.length); Y_jc*S
} D|m3.si
/VufL+q1
private static class MaxHeap{ }+pwSjsno
D&o\q68W
void init(int[] data){ x0ipk}
this.queue=new int[data.length+1]; +L.D3
for(int i=0;i queue[++size]=data; K?!W9lUq
fixUp(size); _E'}8.#{
} V]+y*b.60
} Y~{<Hs
%g@\SR.
private int size=0; DC1.f(cdR
%Y=r5'6l
private int[] queue; |?Edk7`
"a~r'+'<
public int get() { 6k>5+-&_
return queue[1]; ^--R#$X
} cb0rkmO
Ay 4P_>^
public void remove() { ")vtS}Ekt
SortUtil.swap(queue,1,size--); /!?Tv8TPp
fixDown(1); ;|?_C8
} @{_X@Wv4iV
file://fixdown a:UkVK]MP
private void fixDown(int k) { D]}~`SO
int j; fmQif]J;;
while ((j = k << 1) <= size) { \#Jq%nd
if (j < size %26amp;%26amp; queue[j] j++; -=gI_wLbM
if (queue[k]>queue[j]) file://不用交换 x7<l*WQ
break; fKr_u<|
SortUtil.swap(queue,j,k); v^s?=9
k = j; 0|j44e}
} G"-V6CA[
} D86F5HT}}
private void fixUp(int k) { U\qbr.<
while (k > 1) { YsVKdh
int j = k >> 1; e Ru5/y~
if (queue[j]>queue[k]) HK<S|6B7V
break; u pUJF`3
SortUtil.swap(queue,j,k); 26k~Z}
k = j; \$DBtq5=
} CdmpKkq#
} WoGnJ0N q
71P. 9Iz
} ![r)KE=v8I
0)b1'xt',
} .JB1#&B+
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SortUtil： Vjt7X"_/
tx9%.)M:n
package org.rut.util.algorithm; tKLeq(
HpIi-Es7C
import org.rut.util.algorithm.support.BubbleSort; ILH[q>
import org.rut.util.algorithm.support.HeapSort; 5EI"5&`*
import org.rut.util.algorithm.support.ImprovedMergeSort; +2 oZML
import org.rut.util.algorithm.support.ImprovedQuickSort; cl&?'` )
import org.rut.util.algorithm.support.InsertSort; ~uZ9%UB_m
import org.rut.util.algorithm.support.MergeSort; G;u~H<
import org.rut.util.algorithm.support.QuickSort; MmvOyKNZF
import org.rut.util.algorithm.support.SelectionSort; $^^M&[b-
import org.rut.util.algorithm.support.ShellSort; B]<N7NYn1
=FIZh}JD
/** HDzeotD
* @author treeroot @}!?}QU
* @since 2006-2-2 {v=[~H>bt
* @version 1.0 dnwzf=+>e
*/ I{U|'a
public class SortUtil { ts@$*
public final static int INSERT = 1; G9QvIXRi
public final static int BUBBLE = 2; H*3u]Ebh
public final static int SELECTION = 3; Q#ksf h!D
public final static int SHELL = 4; DA>nYj-s
public final static int QUICK = 5; *?uUP
public final static int IMPROVED_QUICK = 6; ;'V[8`Z@
public final static int MERGE = 7; MMET^SO
public final static int IMPROVED_MERGE = 8; a`^$xOK,
public final static int HEAP = 9; n[K%Xs)
Q{uO/6
public static void sort(int[] data) { iiJT%Zq`#
sort(data, IMPROVED_QUICK); @g;DA)!(
} %++: K
private static String[] name={ }93FWo.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" eX"Ecl{
}; z@\mn
vShB26b
private static Sort[] impl=new Sort[]{ =+T0[|gc(r
new InsertSort(), 4h--x~ @
new BubbleSort(), o_Y?s+~i[/
new SelectionSort(), VZ`YbY
new ShellSort(), tS3&&t
new QuickSort(), AT3HHQD
new ImprovedQuickSort(), {6qxg_{
new MergeSort(), :PY8)39@K
new ImprovedMergeSort(), ip{b*@K
new HeapSort() XfMUodV-OZ
}; <'sm($.2
%_p]6doF
public static String toString(int algorithm){ h]z8.k2n
return name[algorithm-1]; ZTfW_0
} gYGoJH1
UCj+V@{
public static void sort(int[] data, int algorithm) { sIaehe'B
impl[algorithm-1].sort(data); >Sk%78={R
} d`$w3Hy
+cmi?~KS*
public static interface Sort { <GQ=PrT|/
public void sort(int[] data); gjnEN1T22
} 'IIa,']H
D5bi)@G7z
public static void swap(int[] data, int i, int j) { OT|0_d?bD
int temp = data; oSy9Xw
data = data[j]; Q$`uZ
data[j] = temp; 4%_c9nat
} MzKl=G
} 4A(h'(^7A