[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; ]LcCom:]
} wZ&l6J4L
int i1=l; WOw( -
int i2=mid+1; )Z.v fc
for(int cur=l;cur<=r;cur++){ 3sh}(
if(i1==mid+1) 2P`Z>_
data[cur]=temp[i2++]; :5YL!D/&
else if(i2>r) DZ-2Z@{PX
data[cur]=temp[i1++]; C;mcb$@
else if(temp[i1] data[cur]=temp[i1++]; Pv- i.
else t)!(s,;T
data[cur]=temp[i2++]; ,;&j*qFi
} %T~3xQ
} MBeubS
[&Yrnkgr
} IE^xk@
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改进后的归并排序: %5?Zjp+9
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package org.rut.util.algorithm.support; thT2U8%T
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import org.rut.util.algorithm.SortUtil; DW@|H
ZGa;'
/** &xAwk-{W
* @author treeroot T[M:%vjYF
* @since 2006-2-2 LqZsH0C
* @version 1.0 yYdow.b!
*/ n<GTc{>Z
public class ImprovedMergeSort implements SortUtil.Sort { kH.e"e
d[0R#2y=
private static final int THRESHOLD = 10; i[IOR0
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/* *Y:;fl +v
* (non-Javadoc) -o+<m4he
* jDWmI%Y.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {IB}g:
*/ zs=[C+Z\
public void sort(int[] data) { [>IV#6$
int[] temp=new int[data.length]; !R`E+G@
mergeSort(data,temp,0,data.length-1); 8M<\?JD~_f
} jTeHI|b
[3@Pu.-I+M
private void mergeSort(int[] data, int[] temp, int l, int r) { eYpK!9
int i, j, k; Z,jR:_p
int mid = (l + r) / 2; efT@A}sV
if (l == r) _~QiQDq
return; 8q}955Nl
if ((mid - l) >= THRESHOLD) vtA%^~0
mergeSort(data, temp, l, mid); =._V$:a6o
else ~W>3EJghR,
insertSort(data, l, mid - l + 1); v,[E*qMN
if ((r - mid) > THRESHOLD) sB~|V <
mergeSort(data, temp, mid + 1, r); P]~apMi:
else `X8wnD
insertSort(data, mid + 1, r - mid); /WxCsQn
QC,LHt?6
for (i = l; i <= mid; i++) { _HAtTW
temp = data; z^FJ
} rGn6S&-
for (j = 1; j <= r - mid; j++) { *^+]`S
temp[r - j + 1] = data[j + mid]; 2FE13{+f
} oAxRI+&|.
int a = temp[l]; : Yb_
int b = temp[r]; N 4!18{/2
for (i = l, j = r, k = l; k <= r; k++) { Ib&]1ger#=
if (a < b) { +$;#bw)yH
data[k] = temp[i++]; ]4X08Cm^
a = temp; 5qL;@Y
} else { O{<uW-
data[k] = temp[j--]; ~VKuRli|m
b = temp[j]; Ux!q(9<_
} <Od5}
} -T8'|"g
} Ai*+LSG
e#<A\?
/** =j!nt8]8
* @param data kZK1{
* @param l d1>L&3HKx
* @param i }v`Z.?|Z
*/ dsG:DS`q
private void insertSort(int[] data, int start, int len) { \uyZl2=WWa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Swxur+hfH
} S] R.:T_%
} (RBB0CE
} 9zD,z+
} "+Kp8n6
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堆排序： Qm)c!
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package org.rut.util.algorithm.support; ~(-df>
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import org.rut.util.algorithm.SortUtil; ;8Ts
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/** &`2$,zX#
* @author treeroot c9ea%7o{0a
* @since 2006-2-2 Vif)e4{Pn
* @version 1.0 ~93#L_V_O
*/ I~&*8)xM
public class HeapSort implements SortUtil.Sort{ C,) e7
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/* (non-Javadoc) zxrbEE Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T( CTU/a-,
*/ Z^t{m!v
public void sort(int[] data) { >f:OU,"
MaxHeap h=new MaxHeap(); 'EO"0,
h.init(data); o<L=l Q
for(int i=0;i h.remove(); 2rrC y C
System.arraycopy(h.queue,1,data,0,data.length); 3Lm7{s?=Z-
} u a_(wBipy
*@fVogr^
private static class MaxHeap{ a\xf\$Ym
DoFF<LXBt
void init(int[] data){ W0LJXp-v
this.queue=new int[data.length+1]; |5(un/-C
for(int i=0;i queue[++size]=data; bmw"-W^U[
fixUp(size); Ih%LKFT
} ,H@ x.
} |6w{%xC?"
}_h2:^n
private int size=0; " XlXu
3z!^UA>q
private int[] queue; Gf<%bQE
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public int get() { e[g.&*!
return queue[1]; 7xfN}iHG
} n7,LfO#
wT&P].5n
public void remove() { v4W<_ 7L_
SortUtil.swap(queue,1,size--); &&TAX
fixDown(1); xeKfc}:&z
} g)=-%n'RoE
file://fixdown Df}3^J~JX
private void fixDown(int k) { "[2D&\$
int j; a!mdL|eA@
while ((j = k << 1) <= size) { c#T0n !}
if (j < size %26amp;%26amp; queue[j] j++; x-HR[{C
if (queue[k]>queue[j]) file://不用交换 %!V=noo
break; jWGX:XB
SortUtil.swap(queue,j,k); o(Q='kK
k = j; U>a~V"5,u
} $j'8Z^
} BF(Kaf;<t.
private void fixUp(int k) { PaBqv]
while (k > 1) { fK5iOj'Q
int j = k >> 1; @iaz_;
if (queue[j]>queue[k]) ke5_lr(
break; WbHI>tt
SortUtil.swap(queue,j,k); 4FcY NJq
k = j; Wq/0}W.
} ($s%B
} r95$( N
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} r&O:Bt}x
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} 3.?B')
E>NL/[1d
SortUtil： v$EgVcK
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package org.rut.util.algorithm; c3|/8
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import org.rut.util.algorithm.support.BubbleSort; ez^b{s`
import org.rut.util.algorithm.support.HeapSort; ziG]BZ
import org.rut.util.algorithm.support.ImprovedMergeSort; 'Q4V(.
import org.rut.util.algorithm.support.ImprovedQuickSort; Y[`%j\=
import org.rut.util.algorithm.support.InsertSort; m^Rf6O^
import org.rut.util.algorithm.support.MergeSort; m95;NT1N/g
import org.rut.util.algorithm.support.QuickSort; y3NMt6
import org.rut.util.algorithm.support.SelectionSort; W=?s-*F[~
import org.rut.util.algorithm.support.ShellSort; <UBB&}R0
1/vcj~|)t
/** e(EXQP2P>
* @author treeroot Jk=d5B
* @since 2006-2-2 nISfRXU;
* @version 1.0 H^0`YQJ3
*/ FW!1 0K?
public class SortUtil { ARa9Ia{@
public final static int INSERT = 1; YhJ*(oWL
public final static int BUBBLE = 2; hxj[gE'R(
public final static int SELECTION = 3; P:tl)ob
public final static int SHELL = 4; bPo*L~xdk
public final static int QUICK = 5; UZ3oc[#D=]
public final static int IMPROVED_QUICK = 6; a?ii)GGq
public final static int MERGE = 7; w@\quy:
public final static int IMPROVED_MERGE = 8; 7|$ H}$
public final static int HEAP = 9; x\!Uk!fM
7s'r3}B`
public static void sort(int[] data) { uY*|bD`6&
sort(data, IMPROVED_QUICK); cT,5xp"a
} '3V?M;3|K
private static String[] name={ bhc .UmH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]2'{W]m
}; rd4\N2- 6
2Uq4PCx!
private static Sort[] impl=new Sort[]{ U{~R39
new InsertSort(), _+x&[^gjP
new BubbleSort(), o9D]\PdL>
new SelectionSort(), 'CC;=@J
new ShellSort(), nLv"ON~
new QuickSort(), yct^AN|%
new ImprovedQuickSort(), /Jw65 e
new MergeSort(), 4e55
new ImprovedMergeSort(), H:&|q+K=#
new HeapSort() OBJk\j+Wi
}; K/+w6d
%b(non*
public static String toString(int algorithm){ Dt p\T|)
return name[algorithm-1]; ]>\!}\R<
} tr$~INe
I%fz^:[#<
public static void sort(int[] data, int algorithm) { y:N>t+'5
impl[algorithm-1].sort(data); ^9PB+mz
} 3-Xc3A=w
C!r9+z)<
public static interface Sort { 6Jf\}^4@k
public void sort(int[] data); _& qM^
} {=GWQn6cc
<!M ab}
public static void swap(int[] data, int i, int j) { %T:7I[f
int temp = data; }v?_.MtS
data = data[j]; G~;hD-D~.
data[j] = temp; L?gak@E
} *K1GX
} zIjUfgO/M