[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; r)<A YX]J
} OUv)`K
int i1=l; P\"kr?jZP
int i2=mid+1; T?3Q<[SmI
for(int cur=l;cur<=r;cur++){ J=A)]YE
if(i1==mid+1) [S6u:;7
data[cur]=temp[i2++]; fUw:jExz
else if(i2>r) "Q:Gd6?h;
data[cur]=temp[i1++]; gM96RY
else if(temp[i1] data[cur]=temp[i1++]; NaR} 0
else t{})6
data[cur]=temp[i2++]; ,,H5zmgA
} VDxm|7
} k1Y\g'1
M;A_'h?Z
} [RF,0>^b
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改进后的归并排序: BMp'.9Qgm
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package org.rut.util.algorithm.support; oW~W(h!
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import org.rut.util.algorithm.SortUtil; K V5 '-Sv1
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/** 1AJ6NBC&c
* @author treeroot Vgm*5a6t
* @since 2006-2-2 80nEQT y
* @version 1.0 7L~*%j
*/ WwmYJl0
public class ImprovedMergeSort implements SortUtil.Sort { 'm<Lx _i
zs=3e~o3
private static final int THRESHOLD = 10; 0cm34\*
IMM;LC%rD9
/* #|9W9\f,
* (non-Javadoc) D]~K-[V?l
* rWht},-|1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a`wjZ"}'[
*/ 3kxo1eb
public void sort(int[] data) { |/,SNE
int[] temp=new int[data.length]; "uH>S+%|b
mergeSort(data,temp,0,data.length-1); 0i~U(qoI
} #A)V
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private void mergeSort(int[] data, int[] temp, int l, int r) { +\=g&G,
int i, j, k; '|H+5#
int mid = (l + r) / 2; R ]Ev=V'U
if (l == r) fe\lSGmf
return; :9&c%~7B9
if ((mid - l) >= THRESHOLD) *fN+wiPD
mergeSort(data, temp, l, mid); ,dRaV</2
else :qm\FsO
insertSort(data, l, mid - l + 1); p%I)&- 8
if ((r - mid) > THRESHOLD) N[Z`tk?-
mergeSort(data, temp, mid + 1, r); eo+<@83
else f-~Y
insertSort(data, mid + 1, r - mid); jE0oLEg&
^Iw$(
for (i = l; i <= mid; i++) { j\C6k
temp = data; $>)0t@[f
} 7. F'1oEf
for (j = 1; j <= r - mid; j++) { [CQR
temp[r - j + 1] = data[j + mid]; SaPE 1^}
} SVU>q:ab
int a = temp[l]; 5kHaZ Q
int b = temp[r]; 217G[YE-
for (i = l, j = r, k = l; k <= r; k++) { 7uR;S:WX
if (a < b) { Yjoe|
data[k] = temp[i++]; %+*=Vr
a = temp; VR(R.
} else { |4\1V=(
data[k] = temp[j--]; [t4v/vQT
b = temp[j]; sVyV|!K
} r;Sk[Y5#
} u=:f%l
} /+*"*Br/
bZ*=fdh
/** u99a"+
* @param data 3d}v?q78
* @param l NQ{(G8x9
* @param i )oIh?-WL
*/ v3r3$(Hr
private void insertSort(int[] data, int start, int len) { ?V6,>e_+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #E]K*mE'
} #/>TuJc
} um,f!ho-U
} j_JY[sex
} Tpl]\L1v-
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堆排序： D:T]$<=9
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package org.rut.util.algorithm.support; &ijz'Sg3
]dUG=dWO
import org.rut.util.algorithm.SortUtil; _a$qsY
^xe+(83S2?
/** @!`__>K
* @author treeroot T;6MUmyC
* @since 2006-2-2 ?.e,NHf
* @version 1.0 t/;2rIx>
*/ v@qP &4Sp
public class HeapSort implements SortUtil.Sort{ !!C/($
8}|et~7!
/* (non-Javadoc) f~VlCdf+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }n^Rcz6HeO
*/ TIGtX]`
public void sort(int[] data) { $d*9]M4
MaxHeap h=new MaxHeap(); "\wMs
h.init(data); v#,queGi
for(int i=0;i h.remove(); JL6$7h
System.arraycopy(h.queue,1,data,0,data.length); ;1(^H:7T
} ofB:7
RHUZ:r
private static class MaxHeap{ >~o-6g
GK$[!{w;
void init(int[] data){ T.da!!'B f
this.queue=new int[data.length+1]; v0DDim?cc
for(int i=0;i queue[++size]=data; /p !A:8
fixUp(size); bWTfP8gT
} aqON6|6K
} ) H,Xkex
w<(ubR %$
private int size=0; uSfHlN4l
!1l~UB_
private int[] queue; n3iiW\
`*s:[k5k
public int get() { \0)jWCK
return queue[1]; vhBW1/w&F
} G^.N$wcv
IR-n:z
public void remove() { I!hh_
SortUtil.swap(queue,1,size--); l5D)UO
fixDown(1); 5f*_K6,v
} D40 vCax^J
file://fixdown 3"x_Y
private void fixDown(int k) { _ $a3lR
int j; H$%MIBz>$
while ((j = k << 1) <= size) { ^MpMqm1?8;
if (j < size %26amp;%26amp; queue[j] j++; 0GUJc}fgvN
if (queue[k]>queue[j]) file://不用交换 |Y uf/G%/
break; d"XZlEV
SortUtil.swap(queue,j,k); t'U=K>7
k = j; eIvZhi
} phy}Hk/
} av'm$I|O
private void fixUp(int k) { oh{>nwH
while (k > 1) { 7DAP_C
int j = k >> 1; w5>[hQR\
if (queue[j]>queue[k]) ||:>&
break; %0GwO%h},
SortUtil.swap(queue,j,k); \OW:-
k = j; I Cc{2l
} WZ-~F/:c%
} .I^4Fc}&4
q;68tEupR
} B<d=;V
LhL |ETrJ
} owIpn=8|Q
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SortUtil： ]?}>D?5
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package org.rut.util.algorithm; h%EeU 3
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import org.rut.util.algorithm.support.BubbleSort; YdhV a!Y
import org.rut.util.algorithm.support.HeapSort; <@Q27oEuA
import org.rut.util.algorithm.support.ImprovedMergeSort; d]0:r]e
import org.rut.util.algorithm.support.ImprovedQuickSort; w;,34qbf
import org.rut.util.algorithm.support.InsertSort; T?RY~GA
import org.rut.util.algorithm.support.MergeSort; m}l);P^
import org.rut.util.algorithm.support.QuickSort; V#Wy` ce
import org.rut.util.algorithm.support.SelectionSort; VukbvBWPN
import org.rut.util.algorithm.support.ShellSort; cy^=!EfA
}2]|*?1,
/** =F@ +~)_
* @author treeroot *H/>96
* @since 2006-2-2 'x%gJi#
* @version 1.0 =E2 a#Vd
*/ FtTq*[a
public class SortUtil { xUn"XkhP
public final static int INSERT = 1; 9Jwd*gevV
public final static int BUBBLE = 2; Z:{| ?4
public final static int SELECTION = 3; p4P=T@:
public final static int SHELL = 4; X,49(-~\
public final static int QUICK = 5; vaeQ}F
public final static int IMPROVED_QUICK = 6; -@XSDfy7S
public final static int MERGE = 7; pN^g.
public final static int IMPROVED_MERGE = 8; #aX#gh}1
public final static int HEAP = 9; HR-'8?)R.A
?;l@yx
public static void sort(int[] data) { M8-8T
sort(data, IMPROVED_QUICK); We y*\@
} RsDSsux
private static String[] name={ ,NGHv?.N
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #zP-,2!r
}; 5qM$ahN3wH
lc <V_8
private static Sort[] impl=new Sort[]{ :of([e|u6
new InsertSort(), @1oX&#
new BubbleSort(), 6_%Cd`4Z
new SelectionSort(), atZe`0
new ShellSort(), 2.Z#\6Vj
new QuickSort(), ^;F/^_
new ImprovedQuickSort(), @@H/q
new MergeSort(), x+Yo#u22
new ImprovedMergeSort(), yhKH} kR
new HeapSort() uUjjAGZ
}; J'2 Yrn
|YLja87
public static String toString(int algorithm){ E7O3$B8
return name[algorithm-1]; fnX[R2KZ
} fd4gB6>
B :%Vq2`
public static void sort(int[] data, int algorithm) { 43k'96[2d
impl[algorithm-1].sort(data); 5$ik|e^:y
} u4hn9**a1
o%'1=d3R1Q
public static interface Sort { YXp\C"~g
public void sort(int[] data); vN(~}gOd\
} G/JGb2I/7|
uBts?02
public static void swap(int[] data, int i, int j) { bkdXBCBx?
int temp = data; N)mZ!K44
data = data[j]; ?pIELezfK
data[j] = temp; L,R}l0kc
} 6 ZRc|ZQ
} \~8W0q.4M