[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; 3AX?B~s
} N+ak[axN
int i1=l; =mDy@%yx!
int i2=mid+1; IJ+O),'
for(int cur=l;cur<=r;cur++){ ~:R4))qpg
if(i1==mid+1) -t;?P2
data[cur]=temp[i2++]; \CP*i_:"
else if(i2>r) ]Fb8.q5(Y
data[cur]=temp[i1++]; s$IcDuBu
else if(temp[i1] data[cur]=temp[i1++]; 8/Lu'rI
else ajf_)G5X P
data[cur]=temp[i2++]; [^cs~ n4
} ")fOup@ ^a
} Ky=(urAd
pb,{$A
} h[vAU 9f)
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改进后的归并排序: H57jBD
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package org.rut.util.algorithm.support; yz54:q?
nhB^Xr=
import org.rut.util.algorithm.SortUtil; 37.)@
y}3 `~a
/** {jq^hM!TEy
* @author treeroot ^!zJf7(+<>
* @since 2006-2-2 /DgT1^&0
* @version 1.0 7Y|Wy Oq
*/ #g5't4zqx
public class ImprovedMergeSort implements SortUtil.Sort { "j*fVn
_N[^Hl`\
private static final int THRESHOLD = 10; G7Edi;y/{
3JwSgcb
/* t[L2'J.5
* (non-Javadoc) UMnR=~.
* iPRJA{$b_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]9!Gg
*/ <m|FccvQ
public void sort(int[] data) { Vs2v j
int[] temp=new int[data.length]; MVu[gB
mergeSort(data,temp,0,data.length-1); <v1_F;{n
} EBN]>zz
Gl3 `e&7
private void mergeSort(int[] data, int[] temp, int l, int r) { =|DkD- O
int i, j, k; $i5G7b
int mid = (l + r) / 2; s.k`];wo
if (l == r) S^_JC
return; x`j_d:C~G
if ((mid - l) >= THRESHOLD) ur,V>J<5A
mergeSort(data, temp, l, mid); gK]T}
else bCe[nmE2
insertSort(data, l, mid - l + 1); gwkZk-f\p
if ((r - mid) > THRESHOLD) X"]mR7k
mergeSort(data, temp, mid + 1, r); '6Rs0__
else ?CL z@u~
insertSort(data, mid + 1, r - mid); _&8KB1~
)^QG-IM
for (i = l; i <= mid; i++) { F~11 _
temp = data; TLR Lng
} {d{WMq$
for (j = 1; j <= r - mid; j++) { kC,DW%Ls
temp[r - j + 1] = data[j + mid]; 1{Sx V
} G5X|JTzpu<
int a = temp[l]; qrORP3D@
int b = temp[r]; <3J=;.\6
for (i = l, j = r, k = l; k <= r; k++) { d-_93
if (a < b) { kG~ivB}x
data[k] = temp[i++]; {#d`&]
a = temp; ~h~r]tV*+
} else { u8$~N$L
data[k] = temp[j--]; PhI{3B/
b = temp[j]; .*clY
} 42H#n]Y
} -qr:c9\px
} g*\v}6 h
oGU.U9~!
/** o 2$<>1^
* @param data d<^6hF
* @param l 8?]%Qi
* @param i =-#iXP@
*/ _cnrGi}T
private void insertSort(int[] data, int start, int len) { ZS 7)(j$.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); YpbdScz
} ,m_&eF
} &Funao>
} Vo58Nz:%
} K;(|v3g6
p%i .(A
堆排序： aO;Q%]VL'
R?FtncL%D
package org.rut.util.algorithm.support; YP@?j
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import org.rut.util.algorithm.SortUtil; :EmMia-)J
Ky{I&}+R|
/** :O_<K&
* @author treeroot ;Ef)7GE@\[
* @since 2006-2-2 /ux#U]x
* @version 1.0 A&@jA5Jb
*/ bN~'cs8 e
public class HeapSort implements SortUtil.Sort{ Q'V,?#
/E1c#@
/* (non-Javadoc) I$sm5oL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EXScqGa]
*/ G5Dji_|
public void sort(int[] data) { c~u F
MaxHeap h=new MaxHeap(); KfI$'F #"/
h.init(data); 3hpz.ISk
for(int i=0;i h.remove(); U#^:f7-$.
System.arraycopy(h.queue,1,data,0,data.length); I n%yMH8
} 1Y"y!\t7G
GCmVmOdKr
private static class MaxHeap{ Z6HkQ=A64
. KSr@Gz
void init(int[] data){ (\[!,T"[
this.queue=new int[data.length+1]; EEnTq
for(int i=0;i queue[++size]=data; (]# JpQ
fixUp(size); x[,wJzp\6
} H'(o}cn7~
} 8`R}L
bKbpI>;[
private int size=0; kv FOk
7G #e~,M5
private int[] queue; '}[L sU
c^/?VmCQ}
public int get() { ?.'oxW
return queue[1]; rD)v%vvr&`
} ?VHwYD.B
5v03<m0`y
public void remove() { AhFI, x
SortUtil.swap(queue,1,size--); X2mm'JDwK
fixDown(1); .J! $,O@
} Q $,kB<M
file://fixdown )#TJw@dNf^
private void fixDown(int k) { ?&bVe__
int j; EYj2h .k
while ((j = k << 1) <= size) { %QcG^R
if (j < size %26amp;%26amp; queue[j] j++; DT~y^h
if (queue[k]>queue[j]) file://不用交换 2nz'/G
break; Ih0>]h-7
SortUtil.swap(queue,j,k); ,'0oj$~S:
k = j; N`^W*>XB
} KPvYq?F>4
} _1bd)L&dF
private void fixUp(int k) { m##z
while (k > 1) { ^)K[1]"uM
int j = k >> 1; /bj`%Q.n
if (queue[j]>queue[k]) C4K&flk]
break; 9YsO+7[
SortUtil.swap(queue,j,k); |a~&E@0c
k = j; JqhVD@1{
} a-A4xL.gm
} h]z|OhG
{xx;zjt%}}
} SNV+.xN
gKH"f%lK
} GHrT?zEX
,oVBgCf
SortUtil： ?;QKe0I^
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package org.rut.util.algorithm; 7)X&fV6<8
Q`fA)6U
import org.rut.util.algorithm.support.BubbleSort; Bc,z]
import org.rut.util.algorithm.support.HeapSort; !6`nN1A
import org.rut.util.algorithm.support.ImprovedMergeSort; a5+v)F/=
import org.rut.util.algorithm.support.ImprovedQuickSort; [t\Mu}b
import org.rut.util.algorithm.support.InsertSort; tTxo:+xg
import org.rut.util.algorithm.support.MergeSort; OehB"[;+
import org.rut.util.algorithm.support.QuickSort; *y@]zNPD
import org.rut.util.algorithm.support.SelectionSort; m!>'}z
import org.rut.util.algorithm.support.ShellSort; bWzc=03
-m-WUox4"
/** t|XC4:/>T
* @author treeroot by3kfY]4s
* @since 2006-2-2 x \{jWR%
* @version 1.0 PH=8'GN
*/ #j5^/*XW
public class SortUtil { 5?Ao9Q]@
public final static int INSERT = 1; s9dBXfm
public final static int BUBBLE = 2; !f2>6}hE
public final static int SELECTION = 3; T1TZ+\
public final static int SHELL = 4; +f~3FXM
public final static int QUICK = 5; aQuy*\$$
public final static int IMPROVED_QUICK = 6; Ss/="jC
public final static int MERGE = 7; mq} #{
public final static int IMPROVED_MERGE = 8; mM%BO(X{=
public final static int HEAP = 9; mT$tAwzTC{
"N"k8,LH
public static void sort(int[] data) { _Dt TG<E
sort(data, IMPROVED_QUICK); 6E&&0'm
} Wm/k(R`O<
private static String[] name={ akoKx)(<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ZdzGJ[$
}; 4vJIO{m
+Uk.|@b=-V
private static Sort[] impl=new Sort[]{ U7'oI;C$e
new InsertSort(), wBGxJ\+M
new BubbleSort(), )y Y;%
new SelectionSort(), a"N_zGf2$
new ShellSort(), Vp94mi#L}
new QuickSort(), 1T`"/*!
new ImprovedQuickSort(), q/zdd3a
new MergeSort(), 1Tkdr2
new ImprovedMergeSort(), {.)D)8`<d
new HeapSort() jC7XdYp
}; 2}#PDhn
X28WQdP,7
public static String toString(int algorithm){ 5qko`r@#
return name[algorithm-1]; 0pz X!f1~
} /!3:K<6@
L4-Pq\2
public static void sort(int[] data, int algorithm) { Y'R1\Go-
impl[algorithm-1].sort(data); [K QZHIe
} T!E LH!
(]dZ+"O{
public static interface Sort { <H#K`|Ag
public void sort(int[] data); j3F=P
} *mtv[
r4zS,J;,
public static void swap(int[] data, int i, int j) { GT0'bge
int temp = data; +?'acn
data = data[j]; 9)X<}*(qo
data[j] = temp; Hn.UJ4V
} yh!vl&8M
} 3E9j%sYk