[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; W5'6L=WG
} |_ED*ATR=
int i1=l; ym5@SBqIx
int i2=mid+1; BPv+gx(>k
for(int cur=l;cur<=r;cur++){ jY\z+lW6A
if(i1==mid+1) W*s=No3C
data[cur]=temp[i2++]; 517"x@6Q
else if(i2>r) >}f!. i
data[cur]=temp[i1++]; oUsfO-dET^
else if(temp[i1] data[cur]=temp[i1++]; <gi~:%T
else cvy 5|;-u
data[cur]=temp[i2++]; z\<,}x}V
} j]&Qai~}Y
} ,j>FCj>
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} =Pn"nkpML
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改进后的归并排序: &8f/6dq
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package org.rut.util.algorithm.support; e.L&A|
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import org.rut.util.algorithm.SortUtil; } *)l
@TW:6v`
/** esZhX)dS
* @author treeroot Zs t)S(
* @since 2006-2-2 * G*VY#L
* @version 1.0 }~&0<8m
*/ hd9~Zw]V
public class ImprovedMergeSort implements SortUtil.Sort { }R}M>^(R4
G6{PrV#
private static final int THRESHOLD = 10; z-K};l9y
GIYdI#0RC
/* :RIqA/
* (non-Javadoc) q]f7D\ M
* }\H. G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "qC3%9e
*/ mpD.x5jm<
public void sort(int[] data) { 4J`-&05O
int[] temp=new int[data.length]; }8l+Jd3"
mergeSort(data,temp,0,data.length-1); + AjV0#n
} XFs7kTY
lMW6D0^
private void mergeSort(int[] data, int[] temp, int l, int r) { w<!&%
int i, j, k; GCQOjqiR
int mid = (l + r) / 2; M@q)\UQ'
if (l == r) ,1|=_M31
return; NR&a er
if ((mid - l) >= THRESHOLD) He4q-\ht
mergeSort(data, temp, l, mid); :T6zT3(")D
else 8KP
insertSort(data, l, mid - l + 1); y#Nrq9r:
if ((r - mid) > THRESHOLD) 7 v3%dCvf
mergeSort(data, temp, mid + 1, r); liB~vdqj
else .'+JA:3R
insertSort(data, mid + 1, r - mid); Z$Ps_Ik
v(O@~8(I
for (i = l; i <= mid; i++) { <.lN'i;(
temp = data; 70*yx?TV
} [KO\!u|?YS
for (j = 1; j <= r - mid; j++) { e6jdSn
temp[r - j + 1] = data[j + mid]; uY3$nlhP6
} zhRF>Y`
int a = temp[l]; [A!=Hv_$
int b = temp[r]; 6xh-m
for (i = l, j = r, k = l; k <= r; k++) { xU.Ymq& 5
if (a < b) { S +73 /Vs
data[k] = temp[i++]; }LIf]YK
a = temp; _cfAJ)8=
} else { V^9%+L+E5
data[k] = temp[j--]; L(`q3>iC4.
b = temp[j]; g2r8J0v
} wE <PXBl\b
} #eI`l`}
} }2?-kj7
[S`Fm>,
/** *i7-_pT
* @param data ON_GD"
* @param l '_=XfTF
* @param i '(($dT
*/ 8=sMmpB 7u
private void insertSort(int[] data, int start, int len) { {}PBYXR
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ORV'dr
} A56aOI=
} oP<E)
} $J:~jY/J
} 9c@\-Z'
bzMs\rj\
堆排序： BA0.B0+"
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package org.rut.util.algorithm.support; ;V~~lcD&Y`
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import org.rut.util.algorithm.SortUtil; fm%-wUgj
RE:$c!E!
/** ! XNTk]!
* @author treeroot (V~PYf%
* @since 2006-2-2 Wr;?t!
* @version 1.0 8[z& g%u
*/ ~dqEUu!C
public class HeapSort implements SortUtil.Sort{ nR~L$Wu5_a
_\xd]~ELj
/* (non-Javadoc) Mio~CJ"?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GwVSRI:[N
*/ 7_#i,|]58
public void sort(int[] data) { |2~fOyA+
MaxHeap h=new MaxHeap(); lN^} qg><
h.init(data); #(NkbJ5ka
for(int i=0;i h.remove(); sh"\ kk9
System.arraycopy(h.queue,1,data,0,data.length); KuO5`
} &ExYul
4 p(KdYc
private static class MaxHeap{ Dy@f21+
3l@={Ts
void init(int[] data){ i;>Hy|
this.queue=new int[data.length+1]; :xT=uE.I
for(int i=0;i queue[++size]=data; 4RqOg1
fixUp(size); .ZrQ{~t
} ' RjFWHAp
} UI 7JMeV
Y<S,Xr;J:
private int size=0; `QlChxd
tXTa>Q
private int[] queue; RSY{IY
&?<o692
public int get() { { LJRdV
return queue[1]; l~M86 h
} /*lSpsBn
xla9:*pPn
public void remove() { 'qhA4W9
SortUtil.swap(queue,1,size--); jn#
fixDown(1); eRa1eRgP
} h2Z Gh
file://fixdown f[!QR
private void fixDown(int k) { xF_ Y7rw1w
int j; '+|{4-V
while ((j = k << 1) <= size) { @fbB3
if (j < size %26amp;%26amp; queue[j] j++; qf9.S)H1Z
if (queue[k]>queue[j]) file://不用交换 *"Ipu"G5?
break; swnov[0
SortUtil.swap(queue,j,k); g4I&3 M
k = j; _~DFZt@T
} 'wX'}3_/g
} b#.hw2?a`
private void fixUp(int k) { .8o?`
while (k > 1) { X,5}i5'!
int j = k >> 1; #jrtsv]
if (queue[j]>queue[k]) L hp
break; o<h2]TN
SortUtil.swap(queue,j,k); (g" {A
k = j; 8Z&M}Llk
} G)|Xj70
} ;X_bDiG$
FOPfob[
} vYFtw L`
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} 7MWd(n-
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SortUtil： ^fiJxU
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package org.rut.util.algorithm; ,NO2{Ha$
Hs:0j$
import org.rut.util.algorithm.support.BubbleSort; !hs33@*u~
import org.rut.util.algorithm.support.HeapSort; ^ps6\>=0cW
import org.rut.util.algorithm.support.ImprovedMergeSort; 7vo8lnQ{
import org.rut.util.algorithm.support.ImprovedQuickSort; eOoqH$ i
import org.rut.util.algorithm.support.InsertSort; g6 H}a
import org.rut.util.algorithm.support.MergeSort; 6i+<0b}!/
import org.rut.util.algorithm.support.QuickSort; F50l->F2&
import org.rut.util.algorithm.support.SelectionSort; mEm=SpO[$o
import org.rut.util.algorithm.support.ShellSort; LR "=(
A"e4w?
/** YdZ9##IU3
* @author treeroot jn 5v
* @since 2006-2-2 t$Bu<frQ
* @version 1.0 eMV{rFmT
*/ >'lvZt
public class SortUtil { wBWqibY|
public final static int INSERT = 1; YQ$LU\:
public final static int BUBBLE = 2; kwXUjnp
public final static int SELECTION = 3; i]#"@xQ
public final static int SHELL = 4; 'fs tfk
public final static int QUICK = 5; =F2`X#x_j
public final static int IMPROVED_QUICK = 6; `;=-71Gn~
public final static int MERGE = 7; 86pA+c+U
public final static int IMPROVED_MERGE = 8; d5>EvK U
public final static int HEAP = 9; }S$OE))u
7KHQ0
public static void sort(int[] data) { ?y]R /?
sort(data, IMPROVED_QUICK); ~?4BP%g-y
} gyQPQ;"H$2
private static String[] name={ U(PW$\l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (rc7Cp3
}; A^E 6)A=
0h~{K
private static Sort[] impl=new Sort[]{ +1a3^A\
new InsertSort(), ]h#QA;
new BubbleSort(), bU/4KZ'-^
new SelectionSort(), >=d 5Scix
new ShellSort(), ]WzeJ"r {3
new QuickSort(), _s+G02/q1
new ImprovedQuickSort(), 3GNcnb
new MergeSort(), jXVvVv
new ImprovedMergeSort(), M}j[{wW3
new HeapSort() aZ|?i }
}; kdWUz(
c|d,:u#
public static String toString(int algorithm){ @eZBwFe
return name[algorithm-1]; D66NF;7q
} @`#x:p:
2~4&4
public static void sort(int[] data, int algorithm) { `dD_"Hdt
impl[algorithm-1].sort(data); 8{]nS8i
} 7x=4P|(\}
>gs_Bzy]
public static interface Sort { 3A{)C_1a
public void sort(int[] data); , O/IY
} h1"|$
ZW9OPwV
public static void swap(int[] data, int i, int j) { ;Xa N
int temp = data; UM#.`
data = data[j]; mBJr*_p
data[j] = temp; >_xuXEslUz
} dC8}Ttc}
} ,[T/O\k