[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[6X|1
} MRK=\qjD
int i1=l; qV idtSb
int i2=mid+1; >ov#\
for(int cur=l;cur<=r;cur++){ l2YClK
if(i1==mid+1) T3<1{"&
data[cur]=temp[i2++]; b_6cK#
else if(i2>r) _&U#*g
data[cur]=temp[i1++]; LyNmn.nN
else if(temp[i1] data[cur]=temp[i1++]; ='w 2"4
else ,}@4@ >?K
data[cur]=temp[i2++]; MzgP@tB
} a#i|)[
} +se OoTKR
K1A<m=If
} ]s^+/8d=
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改进后的归并排序: I= <eCv
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package org.rut.util.algorithm.support; oQ/T5cOj
@mxaZ5Vv}
import org.rut.util.algorithm.SortUtil; k'N``.
v<g~EjzCf
/** _[rQt8zn
* @author treeroot r-!Qw1
* @since 2006-2-2 <%%)C>l
* @version 1.0 vY|YqWt
*/ "u^vBd[}
public class ImprovedMergeSort implements SortUtil.Sort { &fWC-|
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private static final int THRESHOLD = 10; eD2eDxN2
BY[7`@
/* \xl$z*zI
* (non-Javadoc) {r;_nMfH|[
* EK[J!~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tu$rVwgM
*/ IvkYM`%
public void sort(int[] data) { 9_jiUZFje
int[] temp=new int[data.length]; 5Rs#{9YE
mergeSort(data,temp,0,data.length-1); PH:5
} SpU|Q1Q/h
[a!AKkj
private void mergeSort(int[] data, int[] temp, int l, int r) { .81Y/Gad_
int i, j, k; w:deQ:k
int mid = (l + r) / 2; !vJ$$o6#
if (l == r) Wu|MNB?M
return; o@.{|j
if ((mid - l) >= THRESHOLD) 0x5Ax=ut
mergeSort(data, temp, l, mid); & C)1(
else %bF157X5An
insertSort(data, l, mid - l + 1); uF}dEDB|;
if ((r - mid) > THRESHOLD) Keo<#Cc?
mergeSort(data, temp, mid + 1, r); iEr?s-or
else *U$]U0M
insertSort(data, mid + 1, r - mid); (.@peHu)#
gYrB@W;2
for (i = l; i <= mid; i++) { 6.KEe^[-
temp = data; DQxuV1
} c?_7e9}2
for (j = 1; j <= r - mid; j++) { ~MH^R1=]
temp[r - j + 1] = data[j + mid]; p o)lN[v
} V?G%-+^
int a = temp[l]; ~D|,$E tX4
int b = temp[r]; &@CUxK
for (i = l, j = r, k = l; k <= r; k++) { |X A0F\
if (a < b) { bsU$$;
data[k] = temp[i++]; 9m2FH~
a = temp; %}zkmEY.e
} else { .(cpYKFX
data[k] = temp[j--]; `4xQ#K.-
b = temp[j]; |T/OOIA=sI
} c,;VnZ 9wC
} `f&::>5tD
} bK0(c1*a[e
LkzA_|8:D
/** .4"BN<9
* @param data j][&o-Ev
* @param l >}~[ew
* @param i ~?aFc)
*/ JHm Pa
private void insertSort(int[] data, int start, int len) { d@{12hq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 59j`Z^e
} `~=z0I
} WZ,k][~
} }MMKOr(
} ^8,prxaok
jG{?>^
堆排序： GU/P%c/V
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package org.rut.util.algorithm.support; LB]3-FsU+
A. tGr(r
import org.rut.util.algorithm.SortUtil; ]WYub1
)Z/w|5<
/** ySiZ@i4
* @author treeroot 9RJ#zUK
* @since 2006-2-2 psIo[.$rTk
* @version 1.0 '9.@r\g
*/ JSju4TQ4
public class HeapSort implements SortUtil.Sort{ 6g#yzex
/P9fcNP{y
/* (non-Javadoc) K7JZUS`C!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )O+Zbn
*/ )ej1)RU"
public void sort(int[] data) { ;g#nGs>
MaxHeap h=new MaxHeap(); #U%HGTE0
h.init(data); T`]%$$1s
for(int i=0;i h.remove(); QwG_-
System.arraycopy(h.queue,1,data,0,data.length); 1@'I eywg
} 1QmOUw}yj
}[!=O+gO
private static class MaxHeap{ ;J+iwS*Z
Y&,}q_Z:
void init(int[] data){ =BR+J9
this.queue=new int[data.length+1]; C"5P7F{
for(int i=0;i queue[++size]=data; x5\Du63
fixUp(size); @IbZci)1
} 1@LUxU#Uu$
} >JA-G@3i
^b5+A6?
private int size=0; IOxtuR
5cA:;{z];g
private int[] queue; alzdYiGf
Ici4y*`M
public int get() { a"O;DYh
return queue[1]; kFkI[WKyZ
} <a_(qh@B
abS~'r14
public void remove() { E+<GsN]
SortUtil.swap(queue,1,size--); ~$^>Vo
fixDown(1); #M!{D
} lq3D!+m
file://fixdown ) 5Ij
private void fixDown(int k) { qo\9,<
int j; `mD!z.`U
while ((j = k << 1) <= size) { iE;F=Rb
if (j < size %26amp;%26amp; queue[j] j++; 3jW&S
if (queue[k]>queue[j]) file://不用交换 @C=gMn.E
break; (#85<|z
SortUtil.swap(queue,j,k); /!>OWh*~
k = j; ]3 GO_tL
} /4 Kd
} #Q=c.AL{
private void fixUp(int k) { nW\W<[O9
while (k > 1) { 4|Y1W}!0/
int j = k >> 1; jvR(e"
if (queue[j]>queue[k]) ~9k E.
break; @aFk|.6
SortUtil.swap(queue,j,k); Cq<Lj
k = j; {=J:
} w3b?i89
} *+6iXMwe
eAP 8!
} !L9]nO 'BL
Pq{p\Qkj
} If&y 5C
u+6D|
SortUtil： [%6)
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package org.rut.util.algorithm; U6H3T0#
vQ2{+5!|
import org.rut.util.algorithm.support.BubbleSort; iY,oaC~?"N
import org.rut.util.algorithm.support.HeapSort; &KI|qtQ;
import org.rut.util.algorithm.support.ImprovedMergeSort; WL,2<[)Ew
import org.rut.util.algorithm.support.ImprovedQuickSort; %8Y+Df;ax
import org.rut.util.algorithm.support.InsertSort; SS_6VE*sI
import org.rut.util.algorithm.support.MergeSort; ^PJN$BJx
import org.rut.util.algorithm.support.QuickSort; )~"0d;6_
import org.rut.util.algorithm.support.SelectionSort; HFyQ$pbBU
import org.rut.util.algorithm.support.ShellSort; !.pcldx
c`S+>:
/** ~d\V>
* @author treeroot c3#eL
* @since 2006-2-2 6;!)^b
* @version 1.0 o.zP1n|G~r
*/ Ml?KnSb
public class SortUtil { '?_~{\9<
public final static int INSERT = 1; 4eSFpy1
public final static int BUBBLE = 2; Ayn$,
public final static int SELECTION = 3; {=gJGP/}_
public final static int SHELL = 4; 5X5UUdTM
public final static int QUICK = 5; ?X\.O-=4X
public final static int IMPROVED_QUICK = 6; 8~RJnwF^
public final static int MERGE = 7; y | I9"R
public final static int IMPROVED_MERGE = 8; =h ~n5wQG
public final static int HEAP = 9; ~>0H k}Hv
lt2MB#
public static void sort(int[] data) { fWri7|"0h
sort(data, IMPROVED_QUICK); 3a ZS1]/
} {t|#>UCK
private static String[] name={ @}{uibLD\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D8Mq '$-
}; C#)T$wl[E
Hmx.BBz
private static Sort[] impl=new Sort[]{ Q uw|KL
new InsertSort(), GM)q\Hx{
new BubbleSort(), /<k5"C%z
new SelectionSort(), O2 + K
new ShellSort(), ^~bdAO81
new QuickSort(), N cGFPi(Z
new ImprovedQuickSort(), >@4AxV\
new MergeSort(), @B(E&
new ImprovedMergeSort(), 7(^F@,,@
new HeapSort() ?q2Yk/P
}; R2 J A(Hn
uf (_<~
public static String toString(int algorithm){ &0%B3
return name[algorithm-1]; E:PPb9Kd
} xpwy%uo
g4+Hq *
public static void sort(int[] data, int algorithm) { E_Y!in 70
impl[algorithm-1].sort(data); |m@>AbR5dk
} IX<9_q
=]pEvj9o
public static interface Sort { HPt\ BK
public void sort(int[] data); A2A_F|f
} )ZrB-(u~k
fZ;}_wR-H
public static void swap(int[] data, int i, int j) { |Sua4~yL(
int temp = data; @'?gan#(
data = data[j]; 8.I3%u
data[j] = temp; r=AA /n<
} ({!H()
} |90X_6(