[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; h#Z["BG
} {Vj&i.2,
int i1=l; w[d8#U
int i2=mid+1; wr"0+J7
for(int cur=l;cur<=r;cur++){ c45s #6
if(i1==mid+1) r<fcZ)jt|
data[cur]=temp[i2++]; {,JO}Dmu5
else if(i2>r) Mq<ob+
data[cur]=temp[i1++]; ;Tnid7:S
else if(temp[i1] data[cur]=temp[i1++]; `$Rgn3
else HghdTs
data[cur]=temp[i2++]; jz_Y|"{`v
} X PyDZk/m
} Qu[QcB{ro-
m[xl)/e
} ZN#b5I2Pf
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改进后的归并排序: cy.r/Z}
~D3S01ecM
package org.rut.util.algorithm.support; _?H3*!>3
2, )>F"R
import org.rut.util.algorithm.SortUtil; %\ i&g$
^O*-|ecA
/** tnobqL'
* @author treeroot iGSJ\
* @since 2006-2-2 dscah0T
* @version 1.0 H2BRId
*/ -y|J_;EG
public class ImprovedMergeSort implements SortUtil.Sort { )XN%pn
-B#1+rUW
private static final int THRESHOLD = 10; U.,S.WP+d
=_pSfKR;
/* AwNr}9`
* (non-Javadoc) "W"^0To
* >fWGiFmlk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3!l>\#q6
*/ 9{OO'at?
public void sort(int[] data) { 6Yn>9llo}=
int[] temp=new int[data.length]; (*$F7oO<
mergeSort(data,temp,0,data.length-1); 2pdeJ
} FShjUl>mV
|\Jnr3)
private void mergeSort(int[] data, int[] temp, int l, int r) { ,:PMS8pS
int i, j, k; @ &N
int mid = (l + r) / 2; P6.PjK!Ar
if (l == r) ldUZ\z(*
return; v|(]u3=1_
if ((mid - l) >= THRESHOLD) nQmHYOF%
mergeSort(data, temp, l, mid); q~ aFV<Q
else nSyLt6zn\
insertSort(data, l, mid - l + 1); Cd)g8<
if ((r - mid) > THRESHOLD) 0YFXF
mergeSort(data, temp, mid + 1, r); 3[u- LYW
else lo>9 \ Po
insertSort(data, mid + 1, r - mid); -$<oY88
:rU.5(,
for (i = l; i <= mid; i++) { 3S3(Gl
temp = data; +"-l~`+<es
} u!|_bI3
for (j = 1; j <= r - mid; j++) { c ^ds|7i]a
temp[r - j + 1] = data[j + mid]; C zJ-tEO
} w\GJ,e
int a = temp[l]; 4,LS08&gh
int b = temp[r]; `z'8"s
for (i = l, j = r, k = l; k <= r; k++) { (|<S%?}J
if (a < b) { fX`u"`o5
data[k] = temp[i++]; bUS:c 2"
a = temp; Oq~{HJ{
} else { Qw2`@P8W
data[k] = temp[j--]; )).=MTk
b = temp[j]; Hi={(Z5tC4
} ]]:K l
} `.J)Z=o
} ,5 ka{Q`K
((A@VcX
/** 0a89<yX
* @param data "O>~osj
* @param l g)czJ=T2
* @param i \JM6zR^Ef
*/ m8F$h-
private void insertSort(int[] data, int start, int len) { Ag9GYm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1ARtFR2C{b
} "}Om0rB}1
} tcj"rV{G
} =h4uN,
} IW!x!~e
"<0!S~]
堆排序： +h"i6`g
5%\K
package org.rut.util.algorithm.support; 5Jo'h]
n~6$CQ5dF(
import org.rut.util.algorithm.SortUtil; u!D?^:u=)
#6\mTL4vg
/** 3g!Z[SZ
* @author treeroot 4A@HR
* @since 2006-2-2 Wd7*7']
* @version 1.0 8J'5%$3u
*/ =? !FO'zt"
public class HeapSort implements SortUtil.Sort{ kEq~M10
2?%*UxcO
/* (non-Javadoc) .\oW@2,RA9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V]--d33/a
*/ \2 DED
public void sort(int[] data) { Ne+Rs+~4
MaxHeap h=new MaxHeap(); #d %v=.1
h.init(data); OE(y$+L3_I
for(int i=0;i h.remove(); X'$H'[8;C
System.arraycopy(h.queue,1,data,0,data.length); |u%;"N'p)
} 1R@G7m
#9TL5-1y
private static class MaxHeap{ Se!w(Y&
J'WzEgCnU
void init(int[] data){ uxxk&+M
this.queue=new int[data.length+1]; [,Rc&7p~R
for(int i=0;i queue[++size]=data; 1sg:8AA
fixUp(size); cZN<}n+q
} h!dij^bD
} 17'd~-lE
t8RtJ2;
private int size=0; eg*aVb
q0%QMut%
private int[] queue; Pxf>=kY
>6Pe~J5,:
public int get() { EgG3XhfS
return queue[1]; 00;SK!+$
} ef*Z;HI0
UucX1%
public void remove() { r8YM#dF
SortUtil.swap(queue,1,size--); f`ibP6%
fixDown(1); mxCneX
} *^@b0f~vj
file://fixdown >uZc#Zt
private void fixDown(int k) { k 76<CX
int j; CP9Q|'oJ
while ((j = k << 1) <= size) { u^SInanw
if (j < size %26amp;%26amp; queue[j] j++; cu1!WD
if (queue[k]>queue[j]) file://不用交换 8zMGpY#
break; rEp\ld
SortUtil.swap(queue,j,k); C"n!mr{srt
k = j; O\Y*s
} )kjQ W&)g
} bJPKe]spJ=
private void fixUp(int k) { rYt|[Pk
while (k > 1) { kO`!!M[Oo
int j = k >> 1; x_O:IK.>
if (queue[j]>queue[k]) 92Gfxld\
break; uy2~<)
SortUtil.swap(queue,j,k); -,*m\Fe}
k = j; a=ZVKb
} =k d-rIBc
} pFd{Tdh
91R7Rrne
} 0 J"g"=
u `ww
} l$!ExXEZO;
V"8Go;[
SortUtil： &&$*MHJ
3-{WFnA
package org.rut.util.algorithm; b&E"r*i|
M3UC9t9]
import org.rut.util.algorithm.support.BubbleSort; J0k!&d8
import org.rut.util.algorithm.support.HeapSort; |a])o
import org.rut.util.algorithm.support.ImprovedMergeSort; O=}
import org.rut.util.algorithm.support.ImprovedQuickSort; p5rq>&"
import org.rut.util.algorithm.support.InsertSort; 93Gj#Mk
import org.rut.util.algorithm.support.MergeSort; IIMf\JdM
import org.rut.util.algorithm.support.QuickSort; j@nK6`d+1
import org.rut.util.algorithm.support.SelectionSort; JO]?u(m01
import org.rut.util.algorithm.support.ShellSort; 19R~&E's
&to~#.qc
/** b"o\-iUioe
* @author treeroot I3.JAoB>!
* @since 2006-2-2 _0 43,
* @version 1.0 ]Rf$&7`g{
*/ F&p42!"
public class SortUtil { HrLws95'
public final static int INSERT = 1; _~1O#*|4
public final static int BUBBLE = 2; eCJtNPd
public final static int SELECTION = 3; <}&J|()
public final static int SHELL = 4; SefF Ci%4
public final static int QUICK = 5; B:i$
public final static int IMPROVED_QUICK = 6; ;L76V$&
public final static int MERGE = 7; A+Un(tU2(
public final static int IMPROVED_MERGE = 8; BJHWx,v
public final static int HEAP = 9; ,^1 #Uz8
N49{J~
public static void sort(int[] data) { &N7q9t
sort(data, IMPROVED_QUICK); Zd)LVc[
} ,*V%
private static String[] name={ 4j+M<g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7^.g\Kt?
}; j?tE#
+#>nOn(B
private static Sort[] impl=new Sort[]{ 6Yva4Lv
new InsertSort(), =j w?*
new BubbleSort(), zvnd@y{[
new SelectionSort(), /!5cf;kl*l
new ShellSort(), m_ wvi
new QuickSort(), OP(om$xm
new ImprovedQuickSort(), fi'zk
new MergeSort(), LD WYFOGQ
new ImprovedMergeSort(), sjLm-pn3
new HeapSort() xzx~H>M
}; 6e,IjocsB
YJz06E1 -9
public static String toString(int algorithm){ H_8PK$c;
return name[algorithm-1]; WuWOC6^
} xG4 C 6s
b:O_PS5h
public static void sort(int[] data, int algorithm) { \qW^AD(it<
impl[algorithm-1].sort(data); T|$tQgY^
} l9%ckC*q
;\13x][
public static interface Sort { T{3-H(-gA
public void sort(int[] data); NP\/9 8|1
} 4%yeEc;z
R Ee~\n+P^
public static void swap(int[] data, int i, int j) { ~r})&`5
int temp = data; Z~w?Qm:/
data = data[j]; `]6W*^'PD
data[j] = temp; c.-dwz
} 6~!7?FK
} KCa@0