[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; F;cI0kP=>
} F(T=WR].o
int i1=l; db{NKwpj'
int i2=mid+1; j%6|:o3G(
for(int cur=l;cur<=r;cur++){ F6RyOUma
if(i1==mid+1) M/n[&
data[cur]=temp[i2++]; 2Som0T<2
else if(i2>r) L@C >-F|p
data[cur]=temp[i1++]; wlm3~B\64
else if(temp[i1] data[cur]=temp[i1++]; sqm%iyC=q
else 2AdX)iF@
data[cur]=temp[i2++]; lH6Cd/a
} ph Wc8[Q
} ],BJ}~v,X
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} 0|],d?-h
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改进后的归并排序: C\;;9
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package org.rut.util.algorithm.support; ?9o#%?6k
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import org.rut.util.algorithm.SortUtil; $ka1X&f
/V#MLPA
/** 5A0KV7N5
* @author treeroot nG&w0de<>
* @since 2006-2-2 T+&x{+gZ
* @version 1.0 h1Ke$#$6
*/ sq8tv]
public class ImprovedMergeSort implements SortUtil.Sort { N&R '$w
U92B+up-
private static final int THRESHOLD = 10; f9h:"Dnzin
OlD7-c2L]
/* Ktg&G<%J0
* (non-Javadoc) 1G e)p4
* sRkz WMl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J,dG4.ht
*/ }M"-5K}
public void sort(int[] data) { >i><s>=I`
int[] temp=new int[data.length]; "wc`fg"3
mergeSort(data,temp,0,data.length-1); [15hci+-
} &*V0(
#C;#$|d
private void mergeSort(int[] data, int[] temp, int l, int r) { kphy7>Km
int i, j, k; zJB+C=]D7H
int mid = (l + r) / 2; ,g<>`={kK+
if (l == r) :kf3_?9rc
return; [#H8=
if ((mid - l) >= THRESHOLD) )w}*PL
mergeSort(data, temp, l, mid); e3HF"v]2!
else SdEb[
insertSort(data, l, mid - l + 1); Nlf&]^4(0
if ((r - mid) > THRESHOLD) ql%]$`IV6
mergeSort(data, temp, mid + 1, r); h=p-0 Mx .
else x|~D(zo
insertSort(data, mid + 1, r - mid); `Cb<KAaCH
uK"$=v6|
for (i = l; i <= mid; i++) { ie$fMBIq
temp = data; ,b2O^tJF#
} P:zEx]Y%
for (j = 1; j <= r - mid; j++) { o'= [<
temp[r - j + 1] = data[j + mid]; 2vW,.]95M
} e+]YCp[(
int a = temp[l]; EmBfiuX
int b = temp[r]; f:)K
for (i = l, j = r, k = l; k <= r; k++) { tZJ 9}\r
if (a < b) { 0qaG#&!
data[k] = temp[i++]; `#IT24!
a = temp; 2Wc;hJ.1
} else { 0X S' v,|
data[k] = temp[j--]; z9uEOX&2\
b = temp[j]; Eo25ir%
} nvUkbmZG#
} =8VJ.{xy_e
} o/i5e=9[y
5 \.TZMB
/** N2S!.H!Wz
* @param data $fU/9jTa
* @param l U4mh!
* @param i aaqjE
*/ *$WiJ3'(m
private void insertSort(int[] data, int start, int len) { ?tal/uC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `rOe5Zp$
} ;M(ehX
} 6|(7G64{
} _UbR8
} onS{
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堆排序： 8Vg`;_-
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package org.rut.util.algorithm.support; ggYIq*4
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import org.rut.util.algorithm.SortUtil; < 8W:ij.`
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/** ,2:L{8_L
* @author treeroot !&`7
* @since 2006-2-2 |[n|=ORI'
* @version 1.0 ="[+6X
*/ YM,D`c[pX
public class HeapSort implements SortUtil.Sort{ !Z9ikn4A
94>7-d
/* (non-Javadoc) ph$&f0A6Xc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oVj A$|
*/ tIp\MXkTQ&
public void sort(int[] data) { Lu$:,^ C
MaxHeap h=new MaxHeap(); ",,qFM!
h.init(data); #@OKp,LJ
for(int i=0;i h.remove(); |H|eH~.yg&
System.arraycopy(h.queue,1,data,0,data.length); V'|g
} V[2<ha[n>
14)kKWG
private static class MaxHeap{ <pa];k(IQL
8aM% 9OU
void init(int[] data){ SUQ}^gn]
this.queue=new int[data.length+1]; Vm5P@RU$w;
for(int i=0;i queue[++size]=data; Yhv`IV-s
fixUp(size); -:1Gr8
} w]}cB+C+l#
} JeSkNs|vB
5;KT-(q~
private int size=0; ;lPhSkD
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private int[] queue; GmWQJYX\
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public int get() { u+i/CE#w
return queue[1]; #| e5
} K|' ]Hje\
qm&53
public void remove() { $EHn;~w T
SortUtil.swap(queue,1,size--); Ns7l-mb
fixDown(1); J,2v~Dq
} ',-X#u
file://fixdown (fjXp75
private void fixDown(int k) { :\HN?_?{4
int j; fJ+E46|4
while ((j = k << 1) <= size) { &cv/q$W4
if (j < size %26amp;%26amp; queue[j] j++; 5<'Jd3N{&
if (queue[k]>queue[j]) file://不用交换 MyR\_)P?
break; 7Bb@9M?i
SortUtil.swap(queue,j,k); 7}HA_@[
k = j; ,2L,>?r6
} tYxlM!
} qb/!;U_
private void fixUp(int k) { KHC(MdZ
while (k > 1) { KQy\l+\gM
int j = k >> 1; :.o0<
if (queue[j]>queue[k]) #T#FUI1p
break; ynz5Dy.d;
SortUtil.swap(queue,j,k); ;]ZHD$g
k = j; bsS|!KT
} E52:c]<'m
} 6/[h24d
er}'}n`@q
} P_}_D{G
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} m>m`aLrnb
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SortUtil： :<|fZa4!"
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package org.rut.util.algorithm; J'oz P^N
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import org.rut.util.algorithm.support.BubbleSort; e}@J?tJK.L
import org.rut.util.algorithm.support.HeapSort; h-u*~5dB<&
import org.rut.util.algorithm.support.ImprovedMergeSort; =>TtX@Q{
import org.rut.util.algorithm.support.ImprovedQuickSort; S%%qn
import org.rut.util.algorithm.support.InsertSort; Vf2!0
import org.rut.util.algorithm.support.MergeSort; wZolg~dg
import org.rut.util.algorithm.support.QuickSort; "PM:&v
import org.rut.util.algorithm.support.SelectionSort; [+2^n7R
import org.rut.util.algorithm.support.ShellSort; ]5MRp7
fN/KXdAy&
/** ]?5@ObG
* @author treeroot ':fbf7EL<
* @since 2006-2-2 uX!y,a/"
* @version 1.0 HAOrwJFqU
*/ 0R{R=r]
public class SortUtil { Z\yLzy#8
public final static int INSERT = 1; "alO"x8t
public final static int BUBBLE = 2; JQv ZTwSI
public final static int SELECTION = 3; Xrs~ove1V
public final static int SHELL = 4; ?9M+fi
public final static int QUICK = 5; B,qZwc|
public final static int IMPROVED_QUICK = 6; yD'h5)yu
public final static int MERGE = 7; &~6O;}\
public final static int IMPROVED_MERGE = 8; E&=?\KM
public final static int HEAP = 9; iONql7S @
y3$\ m
public static void sort(int[] data) { x{w?X.Nt
sort(data, IMPROVED_QUICK); ph.:~n>z
} $BN+SD!
private static String[] name={ (9QRg;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jWjK-q@Y
}; }|,\?7,
KPK!'4,cu
private static Sort[] impl=new Sort[]{ t$Ji{t-
new InsertSort(), Z%d4V<fn
new BubbleSort(), ]nGA1S{
new SelectionSort(), "s^@PzQpN
new ShellSort(), ;^SgV
new QuickSort(), 3W00,f^9
new ImprovedQuickSort(), KV(W|~+rM
new MergeSort(), LA3,e (e
new ImprovedMergeSort(), T"lqPbK
new HeapSort() rW .0_*
}; 6:X\vw
iC\=U
public static String toString(int algorithm){ lJ2/xE]
return name[algorithm-1]; S;kc{?
} 7q=xW6
D($UbT-v
public static void sort(int[] data, int algorithm) { *m/u3.\
impl[algorithm-1].sort(data); PhdL@Mr
} uZI:Kt#
tG&B D\
public static interface Sort { a,\u|T:g
public void sort(int[] data); ;Q 6e&Ips/
} 3 +9|7=d
;0{*V5A
public static void swap(int[] data, int i, int j) { KPrxw }P
int temp = data; CawVC*b3
data = data[j]; X~b+LG/
data[j] = temp; 8hV:bz"
} k!rz8S"
} JB}h}nb