[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; 7[pBUDA
} neZ.`"LV
int i1=l; u]*0;-tz
int i2=mid+1; i)a%!1Ar
for(int cur=l;cur<=r;cur++){ u=x+J=AH
if(i1==mid+1) d+eZub94U
data[cur]=temp[i2++]; Lgk
else if(i2>r) dT|vYK}\
data[cur]=temp[i1++]; sD;M!K_
else if(temp[i1] data[cur]=temp[i1++]; hX:"QXx
else 8' DW#%
data[cur]=temp[i2++]; p4!:]0c
} _}xd}QW
} I:cg}JZ>|
i1lBto[
} /YAJbr
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改进后的归并排序: )!:sFa 1
c2nKPEX&5
package org.rut.util.algorithm.support; zAzP,1$?
CusF/>
import org.rut.util.algorithm.SortUtil; :aCrX
hVUh0XeO
/** ,f3pqi9|
* @author treeroot rwLAW"0Qz
* @since 2006-2-2 FzQTDu9
* @version 1.0 'k0[rDFc#3
*/ kRCQv-*
public class ImprovedMergeSort implements SortUtil.Sort { uo%P+om_}
l7H qo)
private static final int THRESHOLD = 10; :KJ pk:<
\NZIEu)5?
/* !E8X~DJ
* (non-Javadoc) w'MGA
* B%CTOi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CAq/K?:8
*/ S-Y=-"
public void sort(int[] data) { f5AjJYq1
int[] temp=new int[data.length]; \wcam`f
mergeSort(data,temp,0,data.length-1); {%lXYMyu
} 'rp }G&m
tGvG
private void mergeSort(int[] data, int[] temp, int l, int r) { -VxTx^)>
int i, j, k; 4fk8*{Y
int mid = (l + r) / 2; L!0OC''C
if (l == r) ULrr=5&8
return; !* Ti}oIo&
if ((mid - l) >= THRESHOLD) g9D^)V
mergeSort(data, temp, l, mid); 9vUO*D
else !U9|x\BqJ2
insertSort(data, l, mid - l + 1); h,aAw#NE*
if ((r - mid) > THRESHOLD) v\16RD
mergeSort(data, temp, mid + 1, r); O/AaYA&
else xsd_Uu*
insertSort(data, mid + 1, r - mid); (wDm*bZ*
{'?)FX*W
for (i = l; i <= mid; i++) { A1'hlAGF
temp = data; F'jWV5"*
} [[PEa-992
for (j = 1; j <= r - mid; j++) { poGc a1
temp[r - j + 1] = data[j + mid]; !tfb*@{;'
} ;c~cet4
int a = temp[l]; S#)Eom?V
int b = temp[r]; /Jf.y*;
for (i = l, j = r, k = l; k <= r; k++) { L^2FQti>
if (a < b) { B~o\+n
data[k] = temp[i++]; wW>zgTG
a = temp; xh7cVE[UM
} else { ]#7zk9
data[k] = temp[j--]; }bY;q-
b = temp[j]; jK \T|vGJa
} x~xa6
} eP*lI<NQ1
} { eCC$&"
Y<1QY?1sd
/** <N\v)Ug`
* @param data i1H\#;`$
* @param l zi`b2h
* @param i rSXh;\MfB4
*/ 'RRmIx2X
private void insertSort(int[] data, int start, int len) { _ZY)M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hxCvk/7sT
} ,'[<bP'%_
} B<j'm0a>B
} >e\9Bf_
} 3a.kBzus
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堆排序： 'F>'(XWWQ
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package org.rut.util.algorithm.support; ml\4xp,
G}&Sle]
import org.rut.util.algorithm.SortUtil; tOfg?)h{dc
\j&^aAp r
/** UnI48Y
* @author treeroot 7AYd!n&S
* @since 2006-2-2 0-~\ W(
* @version 1.0 Fx-8M!
*/ 9U$EJN_G
public class HeapSort implements SortUtil.Sort{ ^G6RjJxqp8
vAyFmdJ^
/* (non-Javadoc) nstUMr6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7S?4XyU/o
*/ \[Z?&
public void sort(int[] data) { .e_cgad :
MaxHeap h=new MaxHeap(); ^]{R.(#z
h.init(data); ByCnD
for(int i=0;i h.remove(); `jwa<N4e@
System.arraycopy(h.queue,1,data,0,data.length); 7o8{mp'_
} V<Z[ nq
]XI*Wsn
private static class MaxHeap{ /_`lz^
gx%|Pgd
void init(int[] data){ ABUSTf<
this.queue=new int[data.length+1]; bV ZMW/w
for(int i=0;i queue[++size]=data; zN [2YJ$
fixUp(size); v{}#?=I5
} ,"B+r6}EF
} Iu$K i
lP<:tR~K
private int size=0; '` pDngX
<~ Sz04
private int[] queue; ~%YBI9$+
*zr(Zv
public int get() { r$2P;Cxj
return queue[1]; ">#wOm+ +
} cReB~wk
Mbb x`
public void remove() { Nm|!#(L
SortUtil.swap(queue,1,size--); `ho1nY$)CE
fixDown(1); ]xuG&O"SBV
} 0qX3v<+[6
file://fixdown Th=eNL]
private void fixDown(int k) { lV%N
int j; L'u\w
while ((j = k << 1) <= size) { 2Lx3=[ik
if (j < size %26amp;%26amp; queue[j] j++; L:FoSCN Y(
if (queue[k]>queue[j]) file://不用交换 ;<leKcvhQ&
break; Q=]w !I\
SortUtil.swap(queue,j,k); 0}b tXh
k = j; ^<e.]F25M
} rwGKfoKI
} YCP) %}
private void fixUp(int k) { z<yU-m2h
while (k > 1) { q5?# 3T=
int j = k >> 1; '0FhL)x?"T
if (queue[j]>queue[k]) t+eVR8
break; l8?>>.<P=
SortUtil.swap(queue,j,k); 2$Tj84'X
k = j; %Ah^E$&n2
} y3h/IpT
} -{ H0g]
5=f|7yl
} KN*
eM+!Y>8Y
} dH-s2r%s
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SortUtil： y~FV2$
&}A[x1x06)
package org.rut.util.algorithm; gSh+}r<7
M8tRjNWS?
import org.rut.util.algorithm.support.BubbleSort; ~J P=T
import org.rut.util.algorithm.support.HeapSort; 1R,:
import org.rut.util.algorithm.support.ImprovedMergeSort; l(02W
import org.rut.util.algorithm.support.ImprovedQuickSort; hRCed4qA
import org.rut.util.algorithm.support.InsertSort; /Z$&pqs!
import org.rut.util.algorithm.support.MergeSort; ~8]NK&J
import org.rut.util.algorithm.support.QuickSort; dxmE3*b`
import org.rut.util.algorithm.support.SelectionSort; !_"fP:T>
import org.rut.util.algorithm.support.ShellSort; Y*UA,<-
Vv ?-"\Z>
/** UXh9:T'%
* @author treeroot `DC2gJKk%
* @since 2006-2-2 l g-X:Z.
* @version 1.0 {DR`;ea])1
*/ ndkti5L,
public class SortUtil { Cvf[/C+
public final static int INSERT = 1; B#M5}QT|2
public final static int BUBBLE = 2; Rp5#clsy
public final static int SELECTION = 3; ?#45wC
public final static int SHELL = 4; DK$s&zf
public final static int QUICK = 5; $fzaPD4.
public final static int IMPROVED_QUICK = 6; f\jLqZY
public final static int MERGE = 7; G%s2P.cd
public final static int IMPROVED_MERGE = 8; Iu <?&9t
public final static int HEAP = 9; F F|FU<
QDhOhGK
public static void sort(int[] data) { JhLgCnm
sort(data, IMPROVED_QUICK); AT%u%cE-
} 'hs2RSq
private static String[] name={ PF53mUs4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +1D+]*t_?[
}; 3nhXZOO1
HBMhtfWW
private static Sort[] impl=new Sort[]{ i{`;R
new InsertSort(), GgB,tam{p
new BubbleSort(), ?W)A
new SelectionSort(), vMm1Z5S/
new ShellSort(), lGOgN!?i
new QuickSort(), Vb= Mg
new ImprovedQuickSort(), ;NHt7p8SE
new MergeSort(), RR]CW
new ImprovedMergeSort(), tfGHea)M
new HeapSort() !s&NT @ S
}; yI"6Da6|y
!Y[lQXv
public static String toString(int algorithm){ XR;eY:89
return name[algorithm-1]; eb=D/
} #':fkIYe'
7BJzMlJ1Y
public static void sort(int[] data, int algorithm) { QC9eUYe
impl[algorithm-1].sort(data); fP(d8xTx2y
} m+Rv+_R
W;,C_
public static interface Sort { s[w6FXt
public void sort(int[] data); ~W{2Jd
} hBBUw0"
e8GEoD
public static void swap(int[] data, int i, int j) { K~| 4[\
int temp = data; L{8xlx`
data = data[j]; E6pMT^{K
data[j] = temp; 9T*v9d
} DKBSFm{~Q
} <=>=.kmGt