[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; *j]9vktH
} 6^uq?
int i1=l; 8'~[pMn`
int i2=mid+1; pF&(7u
for(int cur=l;cur<=r;cur++){ 0.dgoq3u
if(i1==mid+1) P9=?zh6G.
data[cur]=temp[i2++]; Em?d*z
else if(i2>r) &Ts-a$Z7?S
data[cur]=temp[i1++]; aD=a,
else if(temp[i1] data[cur]=temp[i1++]; @|<<H3I
else )A!>=2M`
data[cur]=temp[i2++]; 5Ycco,x
} -M%_\;"de
} Ae69>bkE0
8d?g]DEN)6
} A6GE,FhsG
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改进后的归并排序: f~Fm4>\(
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package org.rut.util.algorithm.support; $wmvKQc{lx
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import org.rut.util.algorithm.SortUtil; io,M{Ib
Of{/t1o?
/** wSb1"a
* @author treeroot B+[A]dgS
* @since 2006-2-2 O<96/a'
* @version 1.0 ~\=1'D^6CK
*/ -QOw8vm
public class ImprovedMergeSort implements SortUtil.Sort { dYSr4pb
I*x[:)X8
private static final int THRESHOLD = 10; `VKf3&|<A
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/* ?"zY"*>4
* (non-Javadoc) ^&bRX4pYo
* Xv<B1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fRy^Q_~,
*/ }| J79s2M
public void sort(int[] data) { T^T[$26
int[] temp=new int[data.length]; N-I5X2
mergeSort(data,temp,0,data.length-1); nA P.^_K
} <@}I0
zunV<2~(2}
private void mergeSort(int[] data, int[] temp, int l, int r) { vFE;D@bz:
int i, j, k; o4*+T8[|5
int mid = (l + r) / 2; p3]_}Y D[#
if (l == r) "*LD 3
return; ##@$|6
if ((mid - l) >= THRESHOLD) 9Xl`pEhC
mergeSort(data, temp, l, mid); F;gx%[$GX
else G 16!eDMt
insertSort(data, l, mid - l + 1); kqce[hgs<
if ((r - mid) > THRESHOLD) C0S^h<iSe*
mergeSort(data, temp, mid + 1, r); S}$r>[t
else _Qh z3'I1
insertSort(data, mid + 1, r - mid); Kw8u`$Ad7
\e!vj.PU
for (i = l; i <= mid; i++) { S+'rG+NJ
temp = data; GP&vLt51
} R2(3>`FJ
for (j = 1; j <= r - mid; j++) { ({JHZ6uZ
temp[r - j + 1] = data[j + mid]; N@Y ljz|
} = M]iIWQ@`
int a = temp[l]; OE4+GI.r-
int b = temp[r]; taFn![}/!g
for (i = l, j = r, k = l; k <= r; k++) { s3]?8hXd
if (a < b) { 0 ;b[QRmy
data[k] = temp[i++]; v^zu:Z*
a = temp; hoQs @[
} else { +)j1.X
data[k] = temp[j--]; ^5A t?I8
b = temp[j]; \MjJ9u `8
} &}?$i7x5
} 3&6#F"7
} FBpH21|/y
~=KJzOS,S
/** ={5#fgK>
* @param data ;Ra+=z}>
* @param l (y?ITz9
* @param i "TUe%o
*/ e.@uhB.
private void insertSort(int[] data, int start, int len) { mwY IJy[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9*E7}b,
} Mz1G5xcl
} oyNSh8c7c
} zGc: @z
} !'j?.F$}
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堆排序： =xNv\e
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package org.rut.util.algorithm.support; Pt&(npjN,
?gPKcjgoH!
import org.rut.util.algorithm.SortUtil; -0_d/'d
rp6q?3=g
/** ^':!1
* @author treeroot @#P,d5^G
* @since 2006-2-2 549jWG
* @version 1.0 {5d9$v7k4
*/ @FC"nM
public class HeapSort implements SortUtil.Sort{ RPIyO
X^\>:<
/* (non-Javadoc) !A>z(eIsv`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f]G>(V=i
*/ hFk3[zTy
public void sort(int[] data) { p/2jh&
MaxHeap h=new MaxHeap(); &q`q4g&7
h.init(data); 2-"0 ^n{
for(int i=0;i h.remove(); 0]D{Va
System.arraycopy(h.queue,1,data,0,data.length); {0;3W7
} f8SL3+v
t^[8RhD
private static class MaxHeap{ kl"+YF5/
4n %?YQ[t
void init(int[] data){ Z0`T\ay
this.queue=new int[data.length+1]; DhX#E&
for(int i=0;i queue[++size]=data; A<6%r7&B'
fixUp(size); *loOiM\5a
} )@~J
} }?&k a$rI
>yXN,5d[
private int size=0; #U*_1P0h
RN)dS>$
private int[] queue; :> &fV
y!5$/`AF
public int get() { r1<F
return queue[1]; }BiiE%a
} Y3h/~bM%
Yp0/Ab(v
public void remove() { dgDy5{_
SortUtil.swap(queue,1,size--); 8/t$d#xHI
fixDown(1); *26334B.R
} `;YU.*
file://fixdown 7HVZZ!>~
private void fixDown(int k) { _;4 [Q1
int j; w=|GJ0
while ((j = k << 1) <= size) { ]r3Kg12Mi
if (j < size %26amp;%26amp; queue[j] j++; %?aS#4jI
if (queue[k]>queue[j]) file://不用交换 DAwqo.m
break; CiR%Ujf
SortUtil.swap(queue,j,k); K_ lVISBQ
k = j; /B5-Fx7j3
} nuoPg3Nl
} <" @zn
private void fixUp(int k) { Ne$"g[uFU
while (k > 1) { tX!nsm1
int j = k >> 1; pA;-vMpMj
if (queue[j]>queue[k]) lpRR&
break; i/b'4o=8
SortUtil.swap(queue,j,k); BC,.^"fA6
k = j; '|7Woxl9
} '+ xu#R
} RUr=fEH
4lqH8l.
} H'MJ{r0,
QI]Ih
} 1xU3#b&2tC
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SortUtil： kQaSbpNmH
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package org.rut.util.algorithm; }n7th
:L_BG)dM
import org.rut.util.algorithm.support.BubbleSort; 341?0%=
import org.rut.util.algorithm.support.HeapSort; U$H@ jJ*
import org.rut.util.algorithm.support.ImprovedMergeSort; 3+J0!FVla
import org.rut.util.algorithm.support.ImprovedQuickSort; `:O\dN>ON
import org.rut.util.algorithm.support.InsertSort; >a1{397Y}
import org.rut.util.algorithm.support.MergeSort; V:/7f*n7
import org.rut.util.algorithm.support.QuickSort; UZEI:k,dv
import org.rut.util.algorithm.support.SelectionSort; -o+74=E8[?
import org.rut.util.algorithm.support.ShellSort; @HBEt^!
<`!PCuR
/** .)|a2d ~F
* @author treeroot z4@k$ L8
* @since 2006-2-2 BZb]SoAL
* @version 1.0 u*7Z~R
*/ XhdSFxW}
public class SortUtil { OG3/-K8R
public final static int INSERT = 1; q8:{Nk
public final static int BUBBLE = 2; y fSM
public final static int SELECTION = 3; `.#@@5e
public final static int SHELL = 4; 4f~["[*ea
public final static int QUICK = 5; #k<":O
public final static int IMPROVED_QUICK = 6; T@%m7|P
public final static int MERGE = 7; |wox1Wt|E
public final static int IMPROVED_MERGE = 8; r}u%#G+K,
public final static int HEAP = 9; H0a/(4/xg
Dml*T(WM>
public static void sort(int[] data) { [!^-J}^g~\
sort(data, IMPROVED_QUICK); 1Uf*^WW4
} dbS +
private static String[] name={ l7JY]?p
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1!p/6
}; x'Pi5NRE
mL~z~w*s
private static Sort[] impl=new Sort[]{ w62=06`@
new InsertSort(), uhV0J97
new BubbleSort(), Px M!U!t
new SelectionSort(), 7&O`p(j
new ShellSort(), qQxz(}REu9
new QuickSort(), .bf<<+'o
new ImprovedQuickSort(), PN$ .X"D8
new MergeSort(), Sd IX-k.
new ImprovedMergeSort(), aFY_:.o2k`
new HeapSort() *m+5Pr`7
}; U,1AfzlF
iRG?# "
public static String toString(int algorithm){ NHw x:-RH
return name[algorithm-1]; xx*2?i
} Lt#'W
rZ_>`}O2
public static void sort(int[] data, int algorithm) { &~B5.sppnB
impl[algorithm-1].sort(data); oUx[+Gnv
} rZbEvS
ql5x2n
public static interface Sort { 5/m$)wE
public void sort(int[] data); RV-hIdAU
} !C:rb
Y{f7 f'_
public static void swap(int[] data, int i, int j) { {OT:3SS7
int temp = data; w W$(r-
data = data[j]; ,]Zp+>{
data[j] = temp; LF*Q!
} 5;)*T6Y
} 0;~yZ?6_F