[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; Q]/g=Nn ^~
} "% \y$
int i1=l; bjUe+#BL
int i2=mid+1; AJ 0Bb7
for(int cur=l;cur<=r;cur++){ 7OZ0;fK
if(i1==mid+1) D{]w+
data[cur]=temp[i2++]; Pd:tRY+t/
else if(i2>r) OG IN-
data[cur]=temp[i1++]; .O5|d+S
else if(temp[i1] data[cur]=temp[i1++]; 0NsPo
else n\JSt}A
data[cur]=temp[i2++]; a6T!)g
} ;XY#Jl>tg
} I<lkociUCG
#r&yH^-
} =aT8=ihP
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改进后的归并排序: N*w{NB7L
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package org.rut.util.algorithm.support; i/N68
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import org.rut.util.algorithm.SortUtil; +],2smd@N
~}YgZ/U7T
/** "(F:'J} X
* @author treeroot qB3&F pgW
* @since 2006-2-2 Y$q--JA
* @version 1.0 K<ldl.
*/ 0J)VEMC
public class ImprovedMergeSort implements SortUtil.Sort { P`hg*"<V
$I@. <J*
private static final int THRESHOLD = 10; x@@k_'~t%
e]jzFm~
/* h" YA>_1
* (non-Javadoc) b#e|#!Je
* @(st![i+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q!Dr3x
*/ vP<8,XG
public void sort(int[] data) { !ImtnU}
int[] temp=new int[data.length]; fwyz|>H_Y(
mergeSort(data,temp,0,data.length-1); 5#? HL
} YsjTC$Tx,
]\R%@FCYc
private void mergeSort(int[] data, int[] temp, int l, int r) { bDcWPwe
int i, j, k; Y6%O9b
int mid = (l + r) / 2; ;@u+b0 j
if (l == r) g60rm1b
return; {,m W7
if ((mid - l) >= THRESHOLD) _EZrZB
mergeSort(data, temp, l, mid); ~_L_un.R
else Q_R&+@ju
insertSort(data, l, mid - l + 1); 0jwex
if ((r - mid) > THRESHOLD) b_0Xi
mergeSort(data, temp, mid + 1, r); 93N:?B9
else ~4tu*\P
insertSort(data, mid + 1, r - mid); RIl+QA
=:=uV0jX\
for (i = l; i <= mid; i++) { AUAJMS!m
temp = data; AA,n.;zy<
} NvfQa6?;
for (j = 1; j <= r - mid; j++) { "Tm`V9
temp[r - j + 1] = data[j + mid]; UYb:q
} MY}B)`yx=
int a = temp[l]; _gF )aE
int b = temp[r]; f?A*g$v
for (i = l, j = r, k = l; k <= r; k++) { Ik4U+'z6
if (a < b) { ;HeUD5Nt6F
data[k] = temp[i++]; 3"hPplE
a = temp; sk_Q\0a
} else { EWg\\90
data[k] = temp[j--]; wGf SVA-q\
b = temp[j]; _6 |lw&o07
} }A%Sx!7~
} +H~})PeQ
} l;SqjkN
anTS8b
/** C2</.jeLa
* @param data ?8Hr 9
* @param l !8U\GR `
* @param i .pOTIRbA
*/ ^i^/d#
private void insertSort(int[] data, int start, int len) { 0Y9\,y_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W`^Zb[
} LMrb 1lg$
} i7f/r.
} V4PD]5ZW
} $>;U^-#3
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堆排序： /gKX%`ZF/r
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package org.rut.util.algorithm.support; !$x9s'D
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import org.rut.util.algorithm.SortUtil; .ns1;8
Nj_h+=UE!
/** ~g+?]Lk}
* @author treeroot nTweQ
* @since 2006-2-2 LuB-9[^<
* @version 1.0 <$LVAy"RD
*/ !K#Q[Ee
public class HeapSort implements SortUtil.Sort{ <3iL5}
8-c1q*q)
/* (non-Javadoc) Bg*Oj)NM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }^;Tt-*k
*/ 3EN?{T<yf
public void sort(int[] data) { ^|?/ y=
MaxHeap h=new MaxHeap(); Q&;dXE h
h.init(data); POQRq%w
for(int i=0;i h.remove(); V_?5cwZ
System.arraycopy(h.queue,1,data,0,data.length); :;S]jNy}j)
} $UAmUQg)}_
CxC&+';
private static class MaxHeap{ |"vUC/R2&
N246RV1W
void init(int[] data){ -gl7mO*
this.queue=new int[data.length+1]; -aPvls
for(int i=0;i queue[++size]=data; `g&<7~\=A
fixUp(size); Tp&03
} C#`VVtei
} Lf|5miO
Q"KD O-t
private int size=0; F7wpGtt
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private int[] queue; /ov&h;
0!YB.=\{_q
public int get() { _4VF>#b
return queue[1]; j()<.h;'
} +(*S@V$c
;#G)([
public void remove() { A>8uLO G}
SortUtil.swap(queue,1,size--); .olDmFQD
fixDown(1); TOp|Qtn
} GtRc7,
file://fixdown r7r>1W%4
private void fixDown(int k) { IPK.
int j; ^~k2(DLk
while ((j = k << 1) <= size) { @bQf =N+
if (j < size %26amp;%26amp; queue[j] j++; 1-4iy_d
if (queue[k]>queue[j]) file://不用交换 ,rT62w*e
break; M/XxiF
SortUtil.swap(queue,j,k); i>w'$ {
k = j; >L F y:a
} !N--
} &)@|WLW
private void fixUp(int k) { B>}=x4-8
while (k > 1) { :gMcl"t--
int j = k >> 1; Mvq5s+.
if (queue[j]>queue[k]) gz-X4A"
break; V)CS,w
SortUtil.swap(queue,j,k); %y{#fZHc
k = j; =Jd('r
} 3A'vq2beM
} FMCX->}$
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} vs-%J6}G
=l?F_
} N6Mo|
:uE:mY%R
SortUtil： #'N"<o[
RHc63b\
package org.rut.util.algorithm; w,fA-*bZ 0
5|>FM&
import org.rut.util.algorithm.support.BubbleSort; pJ Iq`)p5
import org.rut.util.algorithm.support.HeapSort; M8oCh
import org.rut.util.algorithm.support.ImprovedMergeSort; e"9u}-Q@
import org.rut.util.algorithm.support.ImprovedQuickSort; jEwfa_Q%
import org.rut.util.algorithm.support.InsertSort; zi7,?bD
import org.rut.util.algorithm.support.MergeSort; Ergh]"AD6-
import org.rut.util.algorithm.support.QuickSort; [EUp4%Z #
import org.rut.util.algorithm.support.SelectionSort; BFP (2j
import org.rut.util.algorithm.support.ShellSort; f$vWi&(
9~8 A>
/** f>\guuG
* @author treeroot :=qblc
* @since 2006-2-2 R#OVJ(#
* @version 1.0 gPs%v`y)*D
*/ vovc,4}
public class SortUtil { 7'g'qUW+~
public final static int INSERT = 1; byz2u
public final static int BUBBLE = 2; S&]AIG)
public final static int SELECTION = 3; Wy{xTLXk2
public final static int SHELL = 4; *"4d6
public final static int QUICK = 5; dLb9p"EE#
public final static int IMPROVED_QUICK = 6; V7}5Zw1
public final static int MERGE = 7; n]$50_@
public final static int IMPROVED_MERGE = 8; Ve,h]/G
public final static int HEAP = 9; +L(0R&C
<T?H H$es)
public static void sort(int[] data) { P%`|Tu!B
sort(data, IMPROVED_QUICK); fx&b*OC
} $^|I?5xD
private static String[] name={ HAa2q=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" oxkA+}^j8M
}; EugQr<sM#
X=O}k&
private static Sort[] impl=new Sort[]{ /5 rWcX
new InsertSort(), tmM8YN|
new BubbleSort(), 6E~T$^Q}
new SelectionSort(), v0EF?$Wo
new ShellSort(), >05_#{up
new QuickSort(), ^B[%|{cO
new ImprovedQuickSort(), $FV!HD
new MergeSort(), QJ{to%
new ImprovedMergeSort(), m/W0vPM1
new HeapSort() 3QlV,)}
}; 6*3J3Lc_<
^+Ho#]
public static String toString(int algorithm){ So &c\Ff
return name[algorithm-1]; T8|aFoHCK
} 6- H81y3
'_)NI
public static void sort(int[] data, int algorithm) { V_Owi5h
impl[algorithm-1].sort(data); S}zh0`+d'Z
} =/xTUI4
{oIv%U9
public static interface Sort { a&yIH;-
public void sort(int[] data); fJ"#c<n
} -oGJPl{r
2w>lnJ-
public static void swap(int[] data, int i, int j) { *Jd,8B/hC
int temp = data; rG7S^,5o
data = data[j]; xsjJ8>G
data[j] = temp; .O9A[s<
} > "G HLi
} Wl3jbupu _