[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; N)S!7%ne
} 341?0%=
int i1=l; 0wFH!s/B
int i2=mid+1; 2Bk$ lx7
for(int cur=l;cur<=r;cur++){ ;Nr]X
if(i1==mid+1) AH4EtZC=W
data[cur]=temp[i2++]; -`f04_@>d
else if(i2>r) _U{([M>;
data[cur]=temp[i1++]; #{9G sD
else if(temp[i1] data[cur]=temp[i1++]; |!q$_at
else @HBEt^!
data[cur]=temp[i2++]; ^E6d`2w-
} 'a^{=+
} pG^}Xf2a
>K# ,cxY
} =`Y.=RL+'n
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改进后的归并排序: ^uS/r#l
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package org.rut.util.algorithm.support; b dJ+@r
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import org.rut.util.algorithm.SortUtil; @<M*qK1h
B/Gd(S`@q
/** -[OXSaf6
* @author treeroot Omi^>c4G
* @since 2006-2-2 ?EU\}N J
* @version 1.0 N~pIC2Woo
*/ r}u%#G+K,
public class ImprovedMergeSort implements SortUtil.Sort { I _i6-<c.Q
MHL("v(@B
private static final int THRESHOLD = 10; tn|,O.t
V@d)?T
/* PuxK?bwC
* (non-Javadoc) k>E`s<3
* |3K)$.6~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .$", *d
*/ x'Pi5NRE
public void sort(int[] data) { JaWv]@9*
int[] temp=new int[data.length]; 7n)&FXK`
mergeSort(data,temp,0,data.length-1); Fg/dS6=n`?
} wA`"\MWm
WxbsD S;
private void mergeSort(int[] data, int[] temp, int l, int r) { .[DthEF
int i, j, k; i`)!X:j
int mid = (l + r) / 2; tvX>{-M
if (l == r) Fv?=Z-wk
return; j%<}jw[2
if ((mid - l) >= THRESHOLD) 6AN)vs}
mergeSort(data, temp, l, mid); yBLUNIr
else }<MR`h1
insertSort(data, l, mid - l + 1); Pw@olG'Ah
if ((r - mid) > THRESHOLD) 5&CDHc7Oj
mergeSort(data, temp, mid + 1, r); rZ_>`}O2
else -~)OF
insertSort(data, mid + 1, r - mid); E?PGu!&u
.Qt4&B
for (i = l; i <= mid; i++) { Bn]K+h\E
temp = data; 7:h!Wj-a]
} ,J mbqOV?!
for (j = 1; j <= r - mid; j++) { !C:rb
temp[r - j + 1] = data[j + mid]; Q\{x)|{$
} &"uV~AM
int a = temp[l]; w W$(r-
int b = temp[r]; ovf/;Q/}
for (i = l, j = r, k = l; k <= r; k++) { WW@"Z}?k
if (a < b) { &jV_"_3n
data[k] = temp[i++]; ~9D~7UR
a = temp; ^_p%Yv
} else { }tST)=M`
data[k] = temp[j--]; ^T4Ay=~{
b = temp[j]; 2 Tvvq(?T
} h5|.Et
} 2aNT#J"_
} F5gObIJtuY
Jx-wO/
/** WVkR56
* @param data iO!6}yJ*V
* @param l ++[5q+b
* @param i d]0a%Xh[
*/ W( *V2<$o
private void insertSort(int[] data, int start, int len) { Em13dem
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N~=A
} [A~G-
} icUT<@0
} *QE<zt
} Z&!!]"I
j?(!^ _!m
堆排序： 0?bA$y
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package org.rut.util.algorithm.support; 5b#QYu
us)*2`?6t
import org.rut.util.algorithm.SortUtil; H5wb_yBQ+
J/D|4fC
/** g?/XZ5$a5
* @author treeroot ){Mu~P
* @since 2006-2-2 SKXBrD=-
* @version 1.0 x.DzViP/
*/ "Q+83adY4x
public class HeapSort implements SortUtil.Sort{ s<T?pH
h.tY 'F
/* (non-Javadoc) Q]JX`HgPaU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &hZwZgV+3
*/ B(HT.%r^A
public void sort(int[] data) { <"&'>?8j
MaxHeap h=new MaxHeap(); t Y1Et0
h.init(data); &m{'nRU}c
for(int i=0;i h.remove(); aSaAC7sFk
System.arraycopy(h.queue,1,data,0,data.length); u@ N~1@RT|
} k1N$+h ;\
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private static class MaxHeap{ gb-{2p>}
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void init(int[] data){ @Gjny BJ
this.queue=new int[data.length+1]; X,fu!
for(int i=0;i queue[++size]=data; eG]a zt
fixUp(size); p6 xPheD
} v"1Po_`
} =fG:A(v%}
J=WB6zi
private int size=0; setLdEi
o$_93<zc
private int[] queue; cqL(^R.
8:g!w:$x
public int get() { -wr(vE,
return queue[1]; FRyPeZR
} -Wo15O"
Y_H/3?b%
public void remove() { Ky9W/dCR
SortUtil.swap(queue,1,size--); !sIwFv)
fixDown(1); ]rX9MA6
} sB7" 0M
file://fixdown o)]FtL:mm
private void fixDown(int k) { y$oW!
int j; i2F(GH?p[
while ((j = k << 1) <= size) { aw$Y`6,S
if (j < size %26amp;%26amp; queue[j] j++; xks?y.wA
if (queue[k]>queue[j]) file://不用交换 |4SW[>WT:
break; VuWib+fT
SortUtil.swap(queue,j,k); }C~]=Z
k = j; fD6GQ*
} emWGIo
} q.oLmX
private void fixUp(int k) { W);W.:F
while (k > 1) { ,{<Fz%
int j = k >> 1; ToU.mM?f^
if (queue[j]>queue[k]) #8?^C]*{0
break; };SV!'9s?~
SortUtil.swap(queue,j,k); YOw?'+8
k = j; :EB,{|m
} dB)[O9K)
} %,?vyY
#<#%>Y^
} ZgF/;8!~V-
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} B7 c[4
vgk9b!Xd
SortUtil： 8eX8IR!K9
05)|"EX)
package org.rut.util.algorithm; l{EU_|q
`p|[rS>
import org.rut.util.algorithm.support.BubbleSort; (T;9us0
import org.rut.util.algorithm.support.HeapSort; |\{Nfm=:%
import org.rut.util.algorithm.support.ImprovedMergeSort; R+Lk~X^*l'
import org.rut.util.algorithm.support.ImprovedQuickSort; >l2w::l%
import org.rut.util.algorithm.support.InsertSort; >UN vkQ:
import org.rut.util.algorithm.support.MergeSort; hWxT!
import org.rut.util.algorithm.support.QuickSort; 84Zgo=P}
import org.rut.util.algorithm.support.SelectionSort; 5; f\0<-
import org.rut.util.algorithm.support.ShellSort; Tk+DPp^
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/** )>$^wT
* @author treeroot ,>S+-L8
* @since 2006-2-2 b;{h?xc6
* @version 1.0 RZ6~c{
*/ @XBH.A^7r
public class SortUtil { q)oN2-
public final static int INSERT = 1; cHEz{'1m
public final static int BUBBLE = 2; >Z"9rF2SW
public final static int SELECTION = 3; +S0u=u65
public final static int SHELL = 4; ,>w}xWSYpG
public final static int QUICK = 5; sRi%1r7
public final static int IMPROVED_QUICK = 6; \^s2W:c
public final static int MERGE = 7; 1*c>I@I;
public final static int IMPROVED_MERGE = 8; |Mlh;
public final static int HEAP = 9; A\g%
)[ b#g(Y(
public static void sort(int[] data) { @LC~*_y
sort(data, IMPROVED_QUICK); UT;4U;a,m
} ~,Mr0
private static String[] name={ xppkLoPK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;+9(;
}; EE9vk*[@C
3{q[q#"
private static Sort[] impl=new Sort[]{ `oPLl0
new InsertSort(), aH^{Vv$]M@
new BubbleSort(), tQf!|]#J
new SelectionSort(), j@SYXKL~
new ShellSort(), 4tnjXP8
new QuickSort(), g-eq&#
new ImprovedQuickSort(), T0?uC/7H
new MergeSort(), nrbazyKm
new ImprovedMergeSort(), x/_dW
new HeapSort() oVEAlBm^v
}; <4$YO-:E
X#7}c5^Y
public static String toString(int algorithm){ PvuAg(?
return name[algorithm-1]; *k[kV
} _Z.;u0Zp8
khS/'b
public static void sort(int[] data, int algorithm) { /x O{ .dr
impl[algorithm-1].sort(data); Vku#;:yUb^
} Un\Ubqi0
\gP. \
public static interface Sort { /pU|ZA.z'2
public void sort(int[] data); i\vpGlx
} Z?C4a}
w Oj88J)
public static void swap(int[] data, int i, int j) { >\&= [C
int temp = data; NkoofhZ
data = data[j]; W/a,.M
data[j] = temp; 7y>(H<^>
} pMDH
} $>(9~Yh0