[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; kqdF)Wa am
} kwF4I)6
int i1=l; 1w*DU9f
int i2=mid+1; U51C /A
for(int cur=l;cur<=r;cur++){ Q4i@y6z
if(i1==mid+1) =wE1j
data[cur]=temp[i2++]; ancs
else if(i2>r) m_ >+$uL
data[cur]=temp[i1++]; HY|=Z\l"
else if(temp[i1] data[cur]=temp[i1++]; 2B Dz \
else 0Rgo#`7l
data[cur]=temp[i2++]; ='"DUQH|*
} b}s)3=X@q
} `tZm
csABfxib
} ay4E\=k
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改进后的归并排序: a$-:F$z
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package org.rut.util.algorithm.support; zI1-l9 o
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import org.rut.util.algorithm.SortUtil; #4?Z|_j3
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/** bruM#T@}
* @author treeroot &ZmWR
* @since 2006-2-2 ]w*w@:Zk
* @version 1.0 {\u=m>2U|
*/ D}YAu,<K
public class ImprovedMergeSort implements SortUtil.Sort { d'y\~M9(
KicPW}_
private static final int THRESHOLD = 10; 9b88):[qO
L!2BE[~
/* +OM`c7M:
* (non-Javadoc) EdgcdSb7
* lyZ[tPS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ! 3&_#VO
*/ afE`GG-
public void sort(int[] data) { *|97 g*G(
int[] temp=new int[data.length]; fjGYp
mergeSort(data,temp,0,data.length-1); J)yNp,V
} ii,/omn:
bvpP/LeY
private void mergeSort(int[] data, int[] temp, int l, int r) { (x"TM),Q
int i, j, k; `*Ar6
int mid = (l + r) / 2; 5ctH=t0
if (l == r) N i\*<:_
return; t.f#_C\
if ((mid - l) >= THRESHOLD) mV\QZfoF
mergeSort(data, temp, l, mid); YhpNeP{A
else gpt98:w:
insertSort(data, l, mid - l + 1); s{q)P1x
if ((r - mid) > THRESHOLD) B{`4"uEb$G
mergeSort(data, temp, mid + 1, r); ea7l:(C
else <S/`-/=2
insertSort(data, mid + 1, r - mid); LY>-kz]
8~q%H1[I\N
for (i = l; i <= mid; i++) { o'uv5asdb
temp = data; -^a?]`3_v
} 60*;a*cy
for (j = 1; j <= r - mid; j++) { #A&(b}#:o
temp[r - j + 1] = data[j + mid]; Nw74T
} @t W;(8-
int a = temp[l]; UM?{ba9
int b = temp[r]; CY{`IZ
for (i = l, j = r, k = l; k <= r; k++) { (+_i^SqK
if (a < b) { ah1DuTT/G
data[k] = temp[i++]; 8+gti*C?\
a = temp; %x Xib9J
} else { io8c[#"uU
data[k] = temp[j--]; f[}N
b = temp[j]; 4O~E4" ]
} )}{V#,xz@
} l,(Mm,3
} `/+%mKlC|[
>=<qAkk
/** 4s{_(gy
* @param data ^Md]e<WAp
* @param l k{fTqKS%h
* @param i qT U(]O1
*/ O^tH43C
private void insertSort(int[] data, int start, int len) { }digw(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .Fdqn?c|+
} Q"2t:
} GoVB1)
} G'*_7HD
} WGxe3(d
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堆排序： m%mA0r
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package org.rut.util.algorithm.support; !y1]S .;
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import org.rut.util.algorithm.SortUtil; J?Y1G<&
A..,.
/** ?2#!63[Kg
* @author treeroot h}vzZZ2,
* @since 2006-2-2 pWU3?U
* @version 1.0 7.-g=Rcz
*/ ZjlFr(
public class HeapSort implements SortUtil.Sort{ cy0 %tsB|
\ow3_^Bk
/* (non-Javadoc) u9d4zR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MT`gCvoF4P
*/ J2c.J/o
public void sort(int[] data) { z0XH`H|~
MaxHeap h=new MaxHeap(); f^ q0#+k)
h.init(data); "K.XoG4|
for(int i=0;i h.remove(); Nk~Xz
System.arraycopy(h.queue,1,data,0,data.length); qNhV zx
} a!`b`r-4
6##}zfl
private static class MaxHeap{ D4CN%^?
>g):xi3qK
void init(int[] data){ +Lq;0tRC
this.queue=new int[data.length+1]; $~#N1
for(int i=0;i queue[++size]=data; 994
fixUp(size); k>W5ts2+
} KJ7[DN'(
} $jLJ&R=?]
M"q]jeaM
private int size=0; =44hI86
vcsrI8+
private int[] queue; 2>Uy`B|f
FQV]/
public int get() { WYHr'xJ
return queue[1]; Iyo ey
} @B<B#
DXbzl +R
public void remove() { eSV_.uvsb
SortUtil.swap(queue,1,size--); *b{C`[ =V
fixDown(1); q>$[<TsE&}
} bzz{ p1e
file://fixdown ^8_`IT
private void fixDown(int k) { ) h*)_7
int j; uO4kCK<7C
while ((j = k << 1) <= size) { auV'`PR
if (j < size %26amp;%26amp; queue[j] j++; >DHpD?Pm!
if (queue[k]>queue[j]) file://不用交换 aJnZco6
break; =cy;{2S'p
SortUtil.swap(queue,j,k); f87>ul!*
k = j; Hk65c0
} c*O{?b
} c1v,5c6d j
private void fixUp(int k) { Ch`nDIne
while (k > 1) { 0YMmWxV
int j = k >> 1; vV2px
if (queue[j]>queue[k]) aFI?^"L
break; O@.afk"{
SortUtil.swap(queue,j,k); nm[ yp3B
k = j; k+(UpO=/*
} S Z@ JzOA
} 1wx&/#a
MX3ss,F
} =xO q-M
/eM_:H5
} k'_p*H
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SortUtil： 8QFn/&Ql$B
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package org.rut.util.algorithm; oB3,"zY
&hK5WP6whW
import org.rut.util.algorithm.support.BubbleSort; -:O~J#D
import org.rut.util.algorithm.support.HeapSort; VrV* -J'
import org.rut.util.algorithm.support.ImprovedMergeSort; ^':Az6Z
import org.rut.util.algorithm.support.ImprovedQuickSort; W#pA W
import org.rut.util.algorithm.support.InsertSort; >s@6rNgf
import org.rut.util.algorithm.support.MergeSort; Cm4$&?
import org.rut.util.algorithm.support.QuickSort; X%S9H^9
import org.rut.util.algorithm.support.SelectionSort; NXAP=y3
import org.rut.util.algorithm.support.ShellSort; .3(=UQ
$(2c0S{1
/** s+"[S%
* @author treeroot *^'$YVd#
* @since 2006-2-2 _$OhV#LKG
* @version 1.0 d|,,,+fS
*/ jg ~;s
public class SortUtil { 3I)!.N[m
public final static int INSERT = 1; G\ twx ;
public final static int BUBBLE = 2; 97H2hYw9l
public final static int SELECTION = 3; X#s:C=q1
public final static int SHELL = 4; !}sYPz]7!
public final static int QUICK = 5; )N{Qpbh
public final static int IMPROVED_QUICK = 6; <{C oM
public final static int MERGE = 7; 48.2_H<
public final static int IMPROVED_MERGE = 8; X X>Y]P a
public final static int HEAP = 9; E6);\SJG}
RvL-SI%E
public static void sort(int[] data) { dAOmqu,6
sort(data, IMPROVED_QUICK); X&^8[,"
} I,{9vew
private static String[] name={ 'ADaz75`*r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E'p5
}; %@<}z|.4
9R XT
private static Sort[] impl=new Sort[]{ /rd6p{F
new InsertSort(), 05".;(
new BubbleSort(), (7nWv43
new SelectionSort(), 7y",%WYSD
new ShellSort(), Qtmsk:qm
new QuickSort(), MSPzOJQPy
new ImprovedQuickSort(), K5x&:z
new MergeSort(), >w:px$g4
new ImprovedMergeSort(), ziuhS4k
new HeapSort() H'uRgBjWJ
}; 0T!_;IQ
u7!X#<
public static String toString(int algorithm){ ;{]%ceetcu
return name[algorithm-1]; P;>8S:8
} V Iof4?i
Im{I23.2
public static void sort(int[] data, int algorithm) { _oxc~v\<
impl[algorithm-1].sort(data); <Bc J;X/
} +p =n-
w'q}aQS
public static interface Sort { u</21fz'
public void sort(int[] data); ~ifo7,
} UzVnC:
?i*kwEj=
public static void swap(int[] data, int i, int j) { %g3@m5&
int temp = data; 3@e#E4+ff
data = data[j]; 6Lw34R
data[j] = temp; WU-.lg'c'
} kV7c\|N9
} i(q%EMf