[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; IL`=r6\
} 6w[EJ;=p_
int i1=l; wOsg,p;\'
int i2=mid+1; W:K'2j
for(int cur=l;cur<=r;cur++){ PlCj<b1D:
if(i1==mid+1) gyuBmY
data[cur]=temp[i2++]; jwP5pu
else if(i2>r) 3cF8DNh
data[cur]=temp[i1++]; w/*m_O\!
else if(temp[i1] data[cur]=temp[i1++]; 5GGO:
else 1x%B`d
data[cur]=temp[i2++]; 7mE9Zo1
} 8{_lB#<[E
} lSc=c-iOv
W6B"QbHYz
} AWJA?
QQv%>=_`
改进后的归并排序: <T&v\DN
'.&Y)A6!
package org.rut.util.algorithm.support; D}Sww5ZmP
<. *bJ
import org.rut.util.algorithm.SortUtil; l>KkAA
h J0U-m
/** $tej~xZK
* @author treeroot KC)}Mzt6_
* @since 2006-2-2 r-.>3J
* @version 1.0 YrV@k*O*
*/ :>U+HQll
public class ImprovedMergeSort implements SortUtil.Sort { E;[Uhh|78!
dT[JVl+3=
private static final int THRESHOLD = 10; 'by+hXk
4u+0 )<
/* AQmHa2P
* (non-Javadoc) _,/~P)
* @w`wJ*I4,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _*MK"
*/ {`,)<R>}
public void sort(int[] data) { dqs~K7O^E
int[] temp=new int[data.length]; eze%RjO}
mergeSort(data,temp,0,data.length-1); 2=/-,kOL_
} >Fs/Wet
eTuKu(0 E
private void mergeSort(int[] data, int[] temp, int l, int r) { xF@&wg
int i, j, k; jFUpf.v2
int mid = (l + r) / 2; >H ?k0M`L
if (l == r) >##Z}auY
return; 1GK>&;
if ((mid - l) >= THRESHOLD) 3&nN;4~Zx6
mergeSort(data, temp, l, mid); niKfat?
else 0[e!/*_V
insertSort(data, l, mid - l + 1); 6?;z\AP&
if ((r - mid) > THRESHOLD) 9g>)7Ne
mergeSort(data, temp, mid + 1, r); s^K2,D]P
else |0Xf":
insertSort(data, mid + 1, r - mid); Ri~$hs!
MX8|;t
for (i = l; i <= mid; i++) { @`dlhz
temp = data; *@H\J e`
} gKQV99
for (j = 1; j <= r - mid; j++) { W"GW[~ h
temp[r - j + 1] = data[j + mid]; eLnS1w2
} I7~) q`
int a = temp[l]; ~f[ Y;
int b = temp[r]; k5Fj"U
for (i = l, j = r, k = l; k <= r; k++) { igW* {)h3
if (a < b) { -%@ah:iJ
data[k] = temp[i++]; 5doi4b>]!
a = temp; {ywwJ
} else { uYWD.]X;[
data[k] = temp[j--]; (zsv!U
b = temp[j]; F"UI=7:o
} 6dV )pJd
} R TpNxr{[
} P^Owgr=Y
;81,1 Ie<~
/** &lLfVa-l
* @param data U||GeEd
* @param l `;J`O02
* @param i YWvD+
*/ ,w3-*z
private void insertSort(int[] data, int start, int len) { qz{9ND|)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gXJBb+P
} QA*<$v
} e6Y>Bk
} t>/x-{bH\
} owQ,op#
/Pkz3(1
堆排序： . ump? M
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package org.rut.util.algorithm.support; 5l 3PAG
]B?M3`'>
import org.rut.util.algorithm.SortUtil; Hd\V?#H
V`1{*PrI@L
/** )iQ^HZ
* @author treeroot Dws) 4hH
* @since 2006-2-2 O~6%Iz`
* @version 1.0 .Zv~a&GE
*/ nqm=snh
public class HeapSort implements SortUtil.Sort{ Z$JJ0X
UZ2_FP
/* (non-Javadoc) YLGE{bS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kuD$]A Q`&
*/ ,1#? 0q
public void sort(int[] data) { V<W;[#"
MaxHeap h=new MaxHeap(); xdgAu
h.init(data); <Q\KS
for(int i=0;i h.remove(); ;Pt8\X
System.arraycopy(h.queue,1,data,0,data.length); &hI!mo
} IBo
<D~hhGb
private static class MaxHeap{ T\uIXL?3
7I XWv-
void init(int[] data){ j2<+[h-
this.queue=new int[data.length+1]; ~TEn +
for(int i=0;i queue[++size]=data; .R)P |@z L
fixUp(size); uC^)#Y\"
} \&hq$
} z3K$gEve
3NLn}
private int size=0; g"1V]
jts0ZFHc-
private int[] queue; iX]OF.:
:LY.C<8
public int get() { "u!gfG?oH
return queue[1]; t4_yp_
} ?J2A1iuq3
kt2_WW[
public void remove() { 8%#8PLB2
SortUtil.swap(queue,1,size--); X]p3?"7
fixDown(1); OW4j!W
} qqf`z,u
file://fixdown Zek@xr;]
private void fixDown(int k) { U 5J _Y
int j; LJ/He[r|[
while ((j = k << 1) <= size) { S3ooG14Ls
if (j < size %26amp;%26amp; queue[j] j++; eV|N@
if (queue[k]>queue[j]) file://不用交换 "dX~J3$
break; 4@@Sh`E:
SortUtil.swap(queue,j,k); Vb`Vp(>AU
k = j; E(4c&
} P\7*ql`
} QIGUi,R
private void fixUp(int k) { eyDV911
while (k > 1) { C6;2Dd]"N
int j = k >> 1; [g/D<g5O
if (queue[j]>queue[k]) >,{sFc
break; Q^Cm3|ZO
SortUtil.swap(queue,j,k); BqNeY<zB*
k = j; f47]gtB-
} EVX3uC}{
} ju{Y6XJ)
B-rE8\
} ~~OFymQ%?q
**hQb$
} uGMzU&+
'6dVe2V
SortUtil： Snf_{A<
gM3:J:N
package org.rut.util.algorithm; e.n(NW
"=Br&FN{|
import org.rut.util.algorithm.support.BubbleSort; 1P!)4W
import org.rut.util.algorithm.support.HeapSort; [P`e@$
import org.rut.util.algorithm.support.ImprovedMergeSort; mZR3Hl$
import org.rut.util.algorithm.support.ImprovedQuickSort; #{q.s[g*+1
import org.rut.util.algorithm.support.InsertSort; d2`g,~d
import org.rut.util.algorithm.support.MergeSort; P"_/P8
import org.rut.util.algorithm.support.QuickSort; XGx[Ny_A2
import org.rut.util.algorithm.support.SelectionSort; *vD.\e~
import org.rut.util.algorithm.support.ShellSort; \FVfV`x
\"a{\E,{;
/** aV'bI
* @author treeroot q*3OWr
* @since 2006-2-2 ?uq`|1`
* @version 1.0 gm-[x5O"
*/ WPL@v+
public class SortUtil { xak)YOLRV
public final static int INSERT = 1; }L_YpG7
public final static int BUBBLE = 2; Lb/GL\J)
public final static int SELECTION = 3; p@Y=6Bw
public final static int SHELL = 4; t@qf/1
public final static int QUICK = 5; 9=>fx
public final static int IMPROVED_QUICK = 6; eO!9;dJ
public final static int MERGE = 7; 1#A$&'&\J;
public final static int IMPROVED_MERGE = 8; 53])@Mmus
public final static int HEAP = 9; 7=CkZ&(?
YZg#H)w%
public static void sort(int[] data) { t WI-
sort(data, IMPROVED_QUICK); AoS7B:T;!
} ~5N}P>4*
private static String[] name={ P1-eDHYw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bC<W7qf]}
}; Y$=jAN
? }M81
private static Sort[] impl=new Sort[]{ ,;`f* #
new InsertSort(), Tlw'05\{J
new BubbleSort(), 7Z6=e6/\
new SelectionSort(), ,|]JaZq
new ShellSort(), nq M7Is
new QuickSort(), p~$cwbQ!
new ImprovedQuickSort(), O(T5
new MergeSort(), $H)^o!
new ImprovedMergeSort(), *&NP?-E
new HeapSort() w 9dkJo
}; N[e,){v
yajdRU
public static String toString(int algorithm){ ` =>}*GS
return name[algorithm-1]; M13HD/~O
} VzP az\e
-'&/7e6>y
public static void sort(int[] data, int algorithm) { [;u#79aE
impl[algorithm-1].sort(data); MR#*/Iw~
} za_b jE
;+9OzF ;
public static interface Sort { sK}AS;:
public void sort(int[] data); 'C[tPP
} 4ijtx)SA
N''QQBUD
public static void swap(int[] data, int i, int j) { yKc-:IBb{u
int temp = data; uR0UfKK
data = data[j]; b[74$W{
data[j] = temp; T`&zQQ6F'
} /WuYg OI
} C~ 1]