[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; U~dqxR"Q
} WC b5
int i1=l; 4JXJ0T ar
int i2=mid+1; U8@P/Z9
for(int cur=l;cur<=r;cur++){ p&D7&Sb[
if(i1==mid+1) 3sDyB-\&
data[cur]=temp[i2++]; 9#kk5)J
else if(i2>r) O'QnfpQ*9
data[cur]=temp[i1++]; ,fo7. h4{
else if(temp[i1] data[cur]=temp[i1++]; PF+Or
else 7p>T6jK)
data[cur]=temp[i2++]; r>.l^U9hJ
} bfkFk
} x'SIHV4M@Q
yV31OBC:
} _Ih"*~ r/&
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改进后的归并排序: 5JhpBx/>o=
lA`-"
package org.rut.util.algorithm.support; u`Kc\BSn
ft0tRv(s:
import org.rut.util.algorithm.SortUtil; 12Fnv/[n'K
7uOtdH+
/** I*/:rb
* @author treeroot !)05,6WQ
* @since 2006-2-2 @g*[}`8]y
* @version 1.0 q;_?e_
*/ ++ObsWZ
public class ImprovedMergeSort implements SortUtil.Sort { @X=sfygk
u#Bj#y!
private static final int THRESHOLD = 10; ]I]G3 e
B~,?Gbl+g
/* G;USVF-'K
* (non-Javadoc) 0T0I<t
* qLw^Qxo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K<WowU
*/ =l6WO*
public void sort(int[] data) { ,'sDauFn
int[] temp=new int[data.length]; 9NZq k
mergeSort(data,temp,0,data.length-1); $_e{Zv[
} rA@|nL{
Ok}e|b[D
private void mergeSort(int[] data, int[] temp, int l, int r) { `M-
int i, j, k; M. _5mZ{
int mid = (l + r) / 2; llCE}Vdh
if (l == r) (&, E}{p9
return; x}x)h3e
if ((mid - l) >= THRESHOLD) )*7{%Ilq
mergeSort(data, temp, l, mid); _^!C4?2!
else c;=St1eoz
insertSort(data, l, mid - l + 1); 0 t/mLw&
if ((r - mid) > THRESHOLD) !"aGo1$$
mergeSort(data, temp, mid + 1, r); T8x/&g''
else 0rif,{"
insertSort(data, mid + 1, r - mid); >:0N)Pj
auM1k]
for (i = l; i <= mid; i++) { 7 Rc/<,X
temp = data; ?q0a^c?A^
} nhd.c2t\
for (j = 1; j <= r - mid; j++) { M3dUGM
temp[r - j + 1] = data[j + mid]; gLx?0eBBA
} vY[u;VU
int a = temp[l]; 5r;)Ppo
int b = temp[r]; 1k"i"kRM
for (i = l, j = r, k = l; k <= r; k++) { @9k3}x K
if (a < b) { h,K&R8S
data[k] = temp[i++]; pTJ_DH
a = temp; )5Cqyp~P
} else { >z,Y%A
data[k] = temp[j--]; R1.Yx?
b = temp[j]; 8-smL^~%#
} y;O 6q206
} 49Y:}<Yd
} Lf{pTxKr
h,]lN'JG{
/** TQvjU!>
* @param data UA#=K+2
* @param l ]HRHF'4
* @param i DvA#zX[
*/ P#;pQC
private void insertSort(int[] data, int start, int len) { kjSzuqB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -7EwZRS@9
} 64:p 4N
} 3@<m/%
} TETfRnm
} qzk]9`i1:
;]rj Kc=
堆排序： c|4_nT 2
[ .3Gb}B
package org.rut.util.algorithm.support; (8em5
8"u.GL.
import org.rut.util.algorithm.SortUtil; ?w)A`G_
i_I`
/** 475jmQ{q
* @author treeroot zD sV"D8
* @since 2006-2-2 &d"scM5
* @version 1.0 >q&e.-qL
*/ Kke _?/fT
public class HeapSort implements SortUtil.Sort{ U/7jK40
uR!'v
/* (non-Javadoc) ux[13]yY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'qeUI}[
*/ BpF}H^V-
public void sort(int[] data) { m^^#3*qa
MaxHeap h=new MaxHeap(); q"LT8nD\
h.init(data); 6-nf+!#G
for(int i=0;i h.remove(); frWY8&W^H
System.arraycopy(h.queue,1,data,0,data.length); g~OG~g@
} uLN.b339
4XeO^#
private static class MaxHeap{ 4U[X-AIY&
aCBq}Xcn
void init(int[] data){ 0s.4]Zg>5
this.queue=new int[data.length+1]; Qk^}
for(int i=0;i queue[++size]=data; ork{a.1-_w
fixUp(size); 2$gFiZ
} t"6u
} EV~?]Kt~
;uuBX0B
private int size=0; \i)@"}
<(us(zbk]
private int[] queue; \/r]Ra
=e6!U5 f
public int get() { E7]a#
return queue[1]; (. ,{x)H
} [bN_0T.YI
<H1e+l{8$
public void remove() { V("T9g
SortUtil.swap(queue,1,size--); N/E=-&E8
fixDown(1); Ge76/T%{Q
} "(:8$Fb
file://fixdown wee5Nirw6
private void fixDown(int k) { b/=>'2f
int j; M/}i7oS]
while ((j = k << 1) <= size) { 0LP>3"Sm
if (j < size %26amp;%26amp; queue[j] j++; r\} O{ZO
if (queue[k]>queue[j]) file://不用交换 /(i~Hpp
break; S'sI[?\x
SortUtil.swap(queue,j,k); J!zL)u|
k = j; o1Wf#Zq
} G:MQ_tfr&
} 'gk^NAG2^E
private void fixUp(int k) { N&u(9Fxn
while (k > 1) { /IC]}0kkp
int j = k >> 1; ,9.NMFn
if (queue[j]>queue[k]) 0fR?zT?
break; D\sh +}"
SortUtil.swap(queue,j,k); BagV\\#v4
k = j; V>Nw2u!!
} 1sfs!b&E
} [wUJ~~2#
~hU^5R-%
} 'W[Nr
CWnRRZ}r
} @OC*:?!4
/?6
SortUtil： ;7!u(XzN
SxM5'KQ
package org.rut.util.algorithm; w)gMJX/0yw
0-U%R)Q
import org.rut.util.algorithm.support.BubbleSort; J5\2`U_FZ
import org.rut.util.algorithm.support.HeapSort; IPnx5#eB
import org.rut.util.algorithm.support.ImprovedMergeSort; Ly6) ,[q~
import org.rut.util.algorithm.support.ImprovedQuickSort; hQDl&A
import org.rut.util.algorithm.support.InsertSort; R"QWap}
import org.rut.util.algorithm.support.MergeSort; SJ:Wr{ Or3
import org.rut.util.algorithm.support.QuickSort; &>hln<a>
import org.rut.util.algorithm.support.SelectionSort; `mKK1x
import org.rut.util.algorithm.support.ShellSort; X!]p8Q y
ybgw#jv=
/** m pM,&7}
* @author treeroot jiLt *>I
* @since 2006-2-2 Oxh.&
* @version 1.0 97VS xhr
*/ [JVUa2Sm
public class SortUtil { T-lHlm
public final static int INSERT = 1; >zv}59M
public final static int BUBBLE = 2; UC"_#!3
public final static int SELECTION = 3; [b@9V_
public final static int SHELL = 4; F#7A6|
public final static int QUICK = 5; IQ9Rvnna
public final static int IMPROVED_QUICK = 6; ==~ lc;
public final static int MERGE = 7; K_BF=C.k
public final static int IMPROVED_MERGE = 8; Uj~ :|?Wz
public final static int HEAP = 9; qg8T}y>
{+|Em(M
public static void sort(int[] data) { `~ R%}ID
sort(data, IMPROVED_QUICK); M{U7yE6*j*
} &0euNHH;sL
private static String[] name={ i>@"&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @!Q\| <
}; ZN(@M@}
I~7eu&QZ
private static Sort[] impl=new Sort[]{ B_|jDH#RyJ
new InsertSort(), x^6sjfAW
new BubbleSort(), o!|TCwt
new SelectionSort(), ,"4
new ShellSort(), QgW4jIbx
new QuickSort(), iYzm<3n?
new ImprovedQuickSort(), ^2!l/(?
new MergeSort(), N>+L?C
new ImprovedMergeSort(), \-)augq([
new HeapSort() [+4--#&{
}; &V7{J9
-8,lXrH
public static String toString(int algorithm){ 8E\6RjM
return name[algorithm-1]; 2sXX0kq~V
} /'>#1J|TlK
'~kAsn*/
public static void sort(int[] data, int algorithm) { dK?vg@|'
impl[algorithm-1].sort(data); 4krK CD>|G
} YW)&IA2
ZG)%vB2c
public static interface Sort { u6u1>
public void sort(int[] data); fk:oCPo
} Q::6|B,G
}\)O1
public static void swap(int[] data, int i, int j) { twJ)h :!_y
int temp = data; ?hwT{h
data = data[j]; '-m )fWf
data[j] = temp; GOhGSV#
} NhA_dskvo
} 3_+$x4%