[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; Y!v `0z
} 3HC aZ?Ry'
int i1=l; [>Kkj;*
int i2=mid+1; *?7Ie;)
for(int cur=l;cur<=r;cur++){ Sb+pB58&N
if(i1==mid+1) hVI $r
data[cur]=temp[i2++]; Z+@"
else if(i2>r) eXWiTi@
data[cur]=temp[i1++]; agN`) F!
else if(temp[i1] data[cur]=temp[i1++]; IM}T2\tZ}
else SY_T\ }
data[cur]=temp[i2++]; |_8-3
} Ps(3X@
} I|,^a|\
B0NKav
} ^wCjMi(sj
|f&)@fUI
改进后的归并排序: ^)conSm
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package org.rut.util.algorithm.support; IY?[0S
(Kd;l&8
import org.rut.util.algorithm.SortUtil; &!vJ3:
<7/_Vs)F0
/** hgX@?WWR
* @author treeroot &xMR{:
* @since 2006-2-2 mdR:XuRD"t
* @version 1.0 2f16 /0J@
*/ u[dR*o0'
public class ImprovedMergeSort implements SortUtil.Sort { 1+v&SU
MbC7`Sp&i
private static final int THRESHOLD = 10; n;)!N
[ /w{,+U
/* k:Sxs+)?1
* (non-Javadoc) R_:47.qq
* \@vR*E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i)g=Lew
*/ RxY ;'NY
public void sort(int[] data) { ,5HQHo@
int[] temp=new int[data.length]; /<vbv
mergeSort(data,temp,0,data.length-1); iXK.QktHw
} uuHR!
Wc ]BQn
private void mergeSort(int[] data, int[] temp, int l, int r) { t/LQ|/xo
int i, j, k; q3adhY9|)0
int mid = (l + r) / 2; \RyOexNZ
if (l == r) S)of.Nq.;
return; *P_(hG&c
if ((mid - l) >= THRESHOLD) l9"0Wu@_x
mergeSort(data, temp, l, mid); Z;=G5O uvQ
else "qjkwf)\
insertSort(data, l, mid - l + 1); o8.KakrPP
if ((r - mid) > THRESHOLD) l7]:b8
mergeSort(data, temp, mid + 1, r); <61T)7
else sxIvL7jl
insertSort(data, mid + 1, r - mid); im|( 4f
9&fS<Hk
for (i = l; i <= mid; i++) { 0m7ANqE[Z
temp = data; MWl?pG!Y
} G=/a>{
for (j = 1; j <= r - mid; j++) { S#6{4x4
temp[r - j + 1] = data[j + mid]; 0B#9CxU%
} R)MWO5
int a = temp[l]; -U~]Bugvh
int b = temp[r]; 1Y4=D
for (i = l, j = r, k = l; k <= r; k++) { P&"8R
if (a < b) { "{1`~pDj?
data[k] = temp[i++]; :kz*.1
a = temp; a|rN %hA4
} else { {I0b%>r=
data[k] = temp[j--]; 6&_"dg"
b = temp[j]; _jg&}HM
} ["Mq
} NC'+-P'y
} 4^cDp!8
iq2)oC_
/** {q fgvu
* @param data @q:v?AO
* @param l ef8_w6i
* @param i ]=\vl>W
*/ qpzzk9ba[
private void insertSort(int[] data, int start, int len) { u UXj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mW~t/$Y$
} idW=
} l?Vm/YXb
} @v{lH&K:;
} )@+lfIE(l
IlQNo 1
堆排序： DT *'r;
%;ZWYj`]n
package org.rut.util.algorithm.support; ^f*}]`S
h!.#r*vV
import org.rut.util.algorithm.SortUtil; ^*JpdmVhu
vM )2F
/** P7ktr?V0a
* @author treeroot /Iht,@%E
* @since 2006-2-2 )c|S)iJ7=z
* @version 1.0 ,{DZvif
*/ eS)2#=
public class HeapSort implements SortUtil.Sort{ >SRUC
r*?rwtFtg
/* (non-Javadoc) V6l~Aj}/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n.9k<
*/ #=@H-ZuD7
public void sort(int[] data) { qZw4"&,j$
MaxHeap h=new MaxHeap(); #m>Rt~(,S
h.init(data); FyD^\6/x
for(int i=0;i h.remove(); VGFWF3s
System.arraycopy(h.queue,1,data,0,data.length); &%J+d"n(
} oVi_X98R
eyq\a'tyB
private static class MaxHeap{ ybnq;0}$
w&&uk[Gh/a
void init(int[] data){ UrAg*v!Qy
this.queue=new int[data.length+1]; V.<$c1#=$
for(int i=0;i queue[++size]=data; P(iZGOKUs=
fixUp(size); CbPCj.MH
} 2K >tI9);
} r=57,P(:Ca
cfZG3"
private int size=0; &qR1fbw"
dzA5l:5
private int[] queue; RSL%<
:CH*~o
public int get() { BPf;!.
return queue[1]; Xxl>,QUA
} z3F ^OU
1X-KuGaD
public void remove() { ?Q$LIoR
SortUtil.swap(queue,1,size--); *Nfn6lVB
fixDown(1); r]!<iw
} VyRU_<xP
file://fixdown .-kqt^Gc
private void fixDown(int k) { agQ5%t#
int j; "v.]s;g
while ((j = k << 1) <= size) { *7`N^e
if (j < size %26amp;%26amp; queue[j] j++; !: e0cV
if (queue[k]>queue[j]) file://不用交换 &uLxAw
break; /t"p^9!^
SortUtil.swap(queue,j,k); }h+_kRQ
k = j; WW.\5kBl8
} m>po+7"b
} y&y(<
private void fixUp(int k) { 5f54E|vD
while (k > 1) { &p?Oo^
int j = k >> 1; Dq T)%a
if (queue[j]>queue[k]) p(2j7W-/
break; m~K[+P
SortUtil.swap(queue,j,k); eiLtZQ
k = j; .aRL'1xHl
} 9&'I?D&8
} +n1jP<[<N
%9_wDfw~
} *%0f^~!G<p
4SG22$7W
} )p.+39]{2
KR
SortUtil： \L#BAB6z
Dl862$_Q
package org.rut.util.algorithm; K;2]c3T
JOj\#!\>k0
import org.rut.util.algorithm.support.BubbleSort; 7f4R5c
import org.rut.util.algorithm.support.HeapSort; dEXHd@"H
import org.rut.util.algorithm.support.ImprovedMergeSort; DdI7%?hK
import org.rut.util.algorithm.support.ImprovedQuickSort; E(G=~>P
import org.rut.util.algorithm.support.InsertSort; ] =Js5
import org.rut.util.algorithm.support.MergeSort; S"|sD|xOb
import org.rut.util.algorithm.support.QuickSort; -t9oL3J
import org.rut.util.algorithm.support.SelectionSort; m8rz i:
import org.rut.util.algorithm.support.ShellSort; Df_W>QC
1SBc:!2
/** _/[n/"gn
* @author treeroot {GF>HHQb
* @since 2006-2-2 ?KxI|os
* @version 1.0 h.)2,
*/ >Kl78w:
public class SortUtil { -_jV.`t
public final static int INSERT = 1; >l$vu-k)~4
public final static int BUBBLE = 2; t\2myR3
public final static int SELECTION = 3; *$(=I6b
public final static int SHELL = 4; Q^Ln`zMe
public final static int QUICK = 5; RJs_ S
public final static int IMPROVED_QUICK = 6; (PYUfiOf
public final static int MERGE = 7; FV/xp}nz
public final static int IMPROVED_MERGE = 8; syh0E=If_
public final static int HEAP = 9; z(< E %
$"{V],:T |
public static void sort(int[] data) { IidZ-Il
sort(data, IMPROVED_QUICK); Q}jbk9gM5
} :C42yQAP
private static String[] name={ ]P0DPea
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8Gb=aF1
}; sF;1)7]Pq
1at$_\{.(
private static Sort[] impl=new Sort[]{ a73b/_zZ=
new InsertSort(), Xi5kE'_
new BubbleSort(), yZ:|wxVY
new SelectionSort(), \3q{E",\>@
new ShellSort(), SX}GKu
new QuickSort(), 1elx~5v1.=
new ImprovedQuickSort(), Coq0Kzhsab
new MergeSort(), 4\(;}M-R{
new ImprovedMergeSort(), dh/:H/k kR
new HeapSort() kyJv,!};
}; pb%#`2"
,|I\{J #C
public static String toString(int algorithm){ u2<:mu[|P
return name[algorithm-1]; &3{:h
} SU# S'
V`69%35*@
public static void sort(int[] data, int algorithm) { mUy/lo'4
impl[algorithm-1].sort(data); *Oz5I
} y<F$@
}sy3Mrb
public static interface Sort { MC#bo{Bq3-
public void sort(int[] data); [ur/`
} fJv0 B*
F__>`Dol
public static void swap(int[] data, int i, int j) { NtTLvO6
int temp = data; `j>qOT
data = data[j]; !xo@i XL
data[j] = temp; q\#3G
} any\}
} 81W})q8