[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; )h(Dt(2Wm
} }7k!>+eQ
int i1=l; g@WGd(o0)
int i2=mid+1; a`}b'X:
for(int cur=l;cur<=r;cur++){ >FtW~J"X
if(i1==mid+1) C N9lK29F)
data[cur]=temp[i2++]; -VK6Fq
else if(i2>r) -w41Bvz0
data[cur]=temp[i1++]; rE?(_LI
else if(temp[i1] data[cur]=temp[i1++]; RG(m:N
else SB5[PDL_q
data[cur]=temp[i2++]; BoZG^
} |7IlYy&:
} ibDMhW$n
CbK&.a
} _=0;5OrK1X
GH%'YY3|
改进后的归并排序: Qxds]5WB/
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package org.rut.util.algorithm.support; '&L;y
x'Z<
import org.rut.util.algorithm.SortUtil; F",]*>r
DJl06-s V
/** `?{Hs+4P5
* @author treeroot ^+Ez[S{8
* @since 2006-2-2 .y7&!a35
* @version 1.0 "cerg?ix
*/ Q(lj&!?1k
public class ImprovedMergeSort implements SortUtil.Sort { |_l\.
UA4Q9<>~
private static final int THRESHOLD = 10; }g WSV
U\S%Jq*
/* ?p{xt$<p
* (non-Javadoc) \jn[kQ+pJ
* &fBLPF%6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %gd=d0vm
*/ % '>S9Ja3
public void sort(int[] data) { !O$*/7
int[] temp=new int[data.length]; a!"81*&4#
mergeSort(data,temp,0,data.length-1); 66\0JsT?3
} ld1t1'I'
cvn4Q-^
private void mergeSort(int[] data, int[] temp, int l, int r) { \GtZX!0
int i, j, k; |(Zv g}c_
int mid = (l + r) / 2; u>;#.N/
if (l == r) S=O/W(ZB
return; -&Fxg>FrYb
if ((mid - l) >= THRESHOLD) 2G"mm(
mergeSort(data, temp, l, mid); gnbs^K w
else .vRLK
insertSort(data, l, mid - l + 1); &J|3uY,'j
if ((r - mid) > THRESHOLD) 3j.Ft*SV
mergeSort(data, temp, mid + 1, r); 9GS<d.#Nvc
else Xu#\CYk
insertSort(data, mid + 1, r - mid); gF%lwq
L1u
for (i = l; i <= mid; i++) { Auhw(b>}TW
temp = data; w<_.T#
} fys@%PZq
for (j = 1; j <= r - mid; j++) { qs6yEuh#
temp[r - j + 1] = data[j + mid]; #bPio
} p$}iBk0B(z
int a = temp[l]; gf+Kr02~
int b = temp[r]; 5EIhCbA
for (i = l, j = r, k = l; k <= r; k++) { ErF;5ec
if (a < b) { _<5o1
data[k] = temp[i++]; ;VS;),h/
a = temp; <FH3ePz
} else { F#_7mC
data[k] = temp[j--]; JJ56d)37.
b = temp[j]; 3+m#v8h1
} c1wM"
} aKaqi}IT
} / /qTMxn
Vn1kC
/** j'-akXo<
* @param data JnCY O^Qj
* @param l ~az6n)
* @param i (c(c MC'
*/ Y',s|M1})\
private void insertSort(int[] data, int start, int len) { UuxWP\~2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9;Ezm<VQ
} 'DF3|A],
} xc R
} s)yEVh
} v%> ?~`Y
ZeK*MPxQ
堆排序： EF0{o_
) 0$7{3
package org.rut.util.algorithm.support; 4UoUuKzt
g'Ft5fQ"o/
import org.rut.util.algorithm.SortUtil; j._9;HifZ
fl~k')s
/** n4)G g~PE
* @author treeroot #e&j]Q$Eh
* @since 2006-2-2 N`y!Km
* @version 1.0 \~xsBPX+x
*/ wpY%"x#-+=
public class HeapSort implements SortUtil.Sort{ H's67E/>*
~=%eOoZP;c
/* (non-Javadoc) uW4G!Kw28
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z>k6T4(
*/ H7"I+qE-G
public void sort(int[] data) { 133lIX+(k
MaxHeap h=new MaxHeap(); 5<4njo?k
h.init(data); {#q<0l
for(int i=0;i h.remove(); .D^k0V
System.arraycopy(h.queue,1,data,0,data.length); HeGGAjc
} L3nHvKA]
Opmb
private static class MaxHeap{ jL8&
e}/c`7M
void init(int[] data){ UuT>qWxQ8
this.queue=new int[data.length+1]; Gyy:.]>&
for(int i=0;i queue[++size]=data; 8NeP7.U<w
fixUp(size); 65ijzZL;
} (Tn*;Xjq
} 9{i6g+
\ ;Hj,z\
private int size=0; >?M:oUVDU
#x#.@
private int[] queue; $a\q<fN}
wx(|$2{h
public int get() { F.?:Gd1
return queue[1]; ;eG%#=>
} *|$s0ga C
xQ1&j,R]
public void remove() { e@k ti@ZJ
SortUtil.swap(queue,1,size--); -sO EL{
fixDown(1); ]9zc[_ !
} a>sUq["
file://fixdown FlVGi3
private void fixDown(int k) { I=f1kr pR
int j; 4OCz:t
while ((j = k << 1) <= size) { LLgN%!&
if (j < size %26amp;%26amp; queue[j] j++; RZ|s[bU
if (queue[k]>queue[j]) file://不用交换 @z dmB~C
break; z2!NBOv
SortUtil.swap(queue,j,k); ,a$LT
k = j; 4s`*o/it
} 3z&,>CEX
} Zi7(lG
private void fixUp(int k) { d7Q. 'cyQ
while (k > 1) { Js^ADUy
int j = k >> 1; ,n &|+&
if (queue[j]>queue[k]) 4x8mJ4[H^
break; e[915Q_
SortUtil.swap(queue,j,k); sXoBw.^Ir_
k = j; 2c0eh-Gf
} `mw@"
} Ow//#:
f`WmRx]K
} ^ 9;s nr
X~GZI*P
} &xH>U*c
X,O&X
SortUtil： ]N1$ioC#
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package org.rut.util.algorithm; Fhxg^
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import org.rut.util.algorithm.support.BubbleSort; {!^HG+
import org.rut.util.algorithm.support.HeapSort; U@f3V8CPy
import org.rut.util.algorithm.support.ImprovedMergeSort; ?3KI}'}EM
import org.rut.util.algorithm.support.ImprovedQuickSort; jGI!}4_
import org.rut.util.algorithm.support.InsertSort; Wf: AMxDm
import org.rut.util.algorithm.support.MergeSort; L$@RSKYp
import org.rut.util.algorithm.support.QuickSort; J5J3%6I
import org.rut.util.algorithm.support.SelectionSort; B+zq!+ HJ
import org.rut.util.algorithm.support.ShellSort; * +A!12s@
\FVR'A1
/** =\X<UA}
* @author treeroot oH6(Lq'q
* @since 2006-2-2 n6Q 3X
* @version 1.0 lt,x(2
*/ s)/i_Oe$\
public class SortUtil { .vpQ3m>
public final static int INSERT = 1; Qg9{<0{u
public final static int BUBBLE = 2; ~Gwn||g78
public final static int SELECTION = 3; Kn\Oj=4
public final static int SHELL = 4; 8l!S<RA
public final static int QUICK = 5; L>@0Nne7
public final static int IMPROVED_QUICK = 6; Fdc bmQ
public final static int MERGE = 7; 1`aFL5[0$
public final static int IMPROVED_MERGE = 8; 6_zL#7E'
public final static int HEAP = 9; `;cKN)Xk
A*\4C3a'%
public static void sort(int[] data) { '^Sa|WXq
sort(data, IMPROVED_QUICK); oVC~RKA*
} ^o?.Rph|i]
private static String[] name={ ctt5t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;C{2*0"H|
}; u=rY
S'E6#
private static Sort[] impl=new Sort[]{ 3kYUO-qw
new InsertSort(), 7qL]_u[^
new BubbleSort(), fVf.u'.8
new SelectionSort(), )%ja6Vg
new ShellSort(), jgEiemh&
new QuickSort(), [FyE{NfiJ%
new ImprovedQuickSort(), w`#lLl B
new MergeSort(), >-)i_C2
new ImprovedMergeSort(), S'3l<sY
new HeapSort() |:H[Y"$1;
}; T w"^I*B
DeXnE$XH
public static String toString(int algorithm){ ?`FI!3j
return name[algorithm-1]; $: Qi9N
} d54>nycU~N
.P,\69g~A
public static void sort(int[] data, int algorithm) { Atfon&^
impl[algorithm-1].sort(data); GVEjB;
} I[[rVts
"me Jn/
public static interface Sort { ?]3`WJOj
public void sort(int[] data); ,qvz:a
} IK%j+UB
H%faRUonz
public static void swap(int[] data, int i, int j) { .4KXe"~E
int temp = data; ~=0zZTG
data = data[j]; 4|++0=#D$
data[j] = temp; /5yWvra
} N{Is2Ia
} 5,?9#n\E,