[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; AQPzId*z
} zomg$@j
int i1=l; UdFYG^i
int i2=mid+1; w!RJ8
for(int cur=l;cur<=r;cur++){ lgC^32y
if(i1==mid+1) Bm;@}Ly=G
data[cur]=temp[i2++]; _:Ov-HIR
else if(i2>r) XeXK~
data[cur]=temp[i1++]; !/Wv\qm
else if(temp[i1] data[cur]=temp[i1++]; CYNpbv
else ?xt${?KP
data[cur]=temp[i2++]; +}C M2>M
} G 'CYvV
} %sS7o3RW\
V6b)
} Yt;@@xe&
2vW@d[<J
改进后的归并排序: wQU-r|
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package org.rut.util.algorithm.support; '~76Y9mv
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import org.rut.util.algorithm.SortUtil; yjucR Fl
^Y^5 @x=
/** NmV][0(BS
* @author treeroot 9|hPl-. .W
* @since 2006-2-2 ]2xoeNF/W{
* @version 1.0 {N0ky=ud
*/ cWa>rUsF
public class ImprovedMergeSort implements SortUtil.Sort { gC/-7/}
[~ |e:
private static final int THRESHOLD = 10; Y0nuwX*{
W97 &[([
/* N-GQ\&
* (non-Javadoc) C5oIl_t
* (ZEDDV2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D"n 3If%
*/ dUpOg{I.x
public void sort(int[] data) { 1I U*:Z;Rz
int[] temp=new int[data.length]; Alb5#tm:m
mergeSort(data,temp,0,data.length-1); WR>2t&;E
} zyFbu=d|O:
eC-nV)]I9
private void mergeSort(int[] data, int[] temp, int l, int r) { %suXp,j
int i, j, k; .g6(07TyV
int mid = (l + r) / 2; !& xc.39
if (l == r) E%>){Y)
return; _:l<4u!
if ((mid - l) >= THRESHOLD) HltURTbI
mergeSort(data, temp, l, mid); ,_yf5 a
else As*59jkB
insertSort(data, l, mid - l + 1); Q_n9}LanP
if ((r - mid) > THRESHOLD) V~qlg1h
mergeSort(data, temp, mid + 1, r); cx(b5Z
else agW#"9]WM
insertSort(data, mid + 1, r - mid); L}%4YB
dDla?)F
for (i = l; i <= mid; i++) { }g[(h=Qi
temp = data; B\Y!5$
} p uLQ_MNV
for (j = 1; j <= r - mid; j++) { & pS5_x
temp[r - j + 1] = data[j + mid]; b."1p7'
} 3:WXrOl
int a = temp[l]; z"lRfOWI
int b = temp[r]; zbL6TP@=
for (i = l, j = r, k = l; k <= r; k++) { >P\/\xL=
if (a < b) { @VcSK`
data[k] = temp[i++]; K-*q3oh G
a = temp; +Udlt)H
} else { B%Spmx8
data[k] = temp[j--]; >T<"fEBI
b = temp[j]; Qf]ACN
} &D~70N\L
} O~AOZ^a:2
} L3-tD67oa
+Ss|4O}'
/** ?(CMm%(8
* @param data !]k$a
* @param l W=EvEx^?%
* @param i Lqv5"r7eV
*/ ?pv}~>
private void insertSort(int[] data, int start, int len) { %%w]-`^h,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,&IBj6%Y
} 6 4da~SEn
} ]='E&=nc
} (U |[C*
} }]H_|V*f
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堆排序： 5E/z.5 q
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package org.rut.util.algorithm.support; vO2o/
2|)3Ly9
import org.rut.util.algorithm.SortUtil; ,]'?Gd
j9za)G-J
/** /0mbG!Ac
* @author treeroot cFoDR
* @since 2006-2-2 x.+}-(`W#~
* @version 1.0 <"@~
*/ \gL H_$}
public class HeapSort implements SortUtil.Sort{ ,"u-V<>6O
qlSc[nEk
/* (non-Javadoc) J..>ApX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ']+-u{+#
*/ cRX0i;zag
public void sort(int[] data) { 0f 1Lu) 2
MaxHeap h=new MaxHeap(); PQsqi;=)
h.init(data); RvYH(!pQ
for(int i=0;i h.remove(); ~3.1. 'A
System.arraycopy(h.queue,1,data,0,data.length); lu(<(t,Lbs
} Dqe/n_Z
})|+tZ
private static class MaxHeap{ /GNRu
RV|: mI
void init(int[] data){ QH6Lb%]/
this.queue=new int[data.length+1]; SQ)$>3>C
for(int i=0;i queue[++size]=data; s&p*.I]@>
fixUp(size); %,GY&hTw
} ky#d`
} a4X J0Tm
T"'"T]^ X
private int size=0; Ay!=Yk^~
x{C=rdp__
private int[] queue; j[yGfDb
\@Gyl_6^
public int get() { k'wF+>
return queue[1]; phUno2fH
} 0,(U_+n
Va06(Cq
public void remove() { !J[3U
SortUtil.swap(queue,1,size--); [zK|OMxoV
fixDown(1); n6[bF"v
} @?{n`K7{`
file://fixdown {!xPq%
private void fixDown(int k) { 7[QU *1bk
int j; `|i #)
while ((j = k << 1) <= size) { %WCA?W0:4
if (j < size %26amp;%26amp; queue[j] j++; yyrCO"eh
if (queue[k]>queue[j]) file://不用交换 O%A:2Y79
break; 52tIe|KwL
SortUtil.swap(queue,j,k); bc5+}&W
k = j; r~u/M0h `
} Q$W0>bUP
} J& +s
private void fixUp(int k) { KSuP'.l
while (k > 1) { O$Wt\Y<q
int j = k >> 1; }?#<)|_5
if (queue[j]>queue[k]) PX[taDN
break; 42:\1B#[
SortUtil.swap(queue,j,k); zrE ~%YR
k = j; Uq~{=hMX
} Q<d\K(<3?:
} 75@){ :
E$34myOVf
} ]}8<h5h)
\S}&QV
} RqXcL,,9
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SortUtil： P 5m{}@g
zVZZdG~8
package org.rut.util.algorithm; v@LK3S/!3
B=7bQli}
import org.rut.util.algorithm.support.BubbleSort; z*YkD"]B
import org.rut.util.algorithm.support.HeapSort; 2K!3+D"
import org.rut.util.algorithm.support.ImprovedMergeSort; RhnSQe
import org.rut.util.algorithm.support.ImprovedQuickSort; d[w'j/{
import org.rut.util.algorithm.support.InsertSort; 3)zanoYHi
import org.rut.util.algorithm.support.MergeSort; r{$ip"f
import org.rut.util.algorithm.support.QuickSort; za1MSR
import org.rut.util.algorithm.support.SelectionSort; .rD@Q{e50
import org.rut.util.algorithm.support.ShellSort; 8V;@yzIha
K\nN2y
/** {%9)l,
* @author treeroot OlK3xdg7
* @since 2006-2-2 VThcG( NF
* @version 1.0 U voX\
*/ =;7gxV3;
public class SortUtil { kTAb <
public final static int INSERT = 1; 0_}OKn)J
public final static int BUBBLE = 2; 36*"oD=@
public final static int SELECTION = 3; wXMKQ)$(
public final static int SHELL = 4; 1%]|O
public final static int QUICK = 5; f/~"_O%
public final static int IMPROVED_QUICK = 6; Y _m4:9p
public final static int MERGE = 7; xM8}Xo
public final static int IMPROVED_MERGE = 8; iN"kv
public final static int HEAP = 9; o=_:g >5
@JZ I
public static void sort(int[] data) { -/ ;y*mP
sort(data, IMPROVED_QUICK); ^G[xQcM73
} {2vk<
private static String[] name={ C~ t?<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" TUIj-HSe
}; YFv/t=`
S 3Tp__
private static Sort[] impl=new Sort[]{ ,aeQXI#@
new InsertSort(), ,=O`'l>K
new BubbleSort(), {UX?z?0T
new SelectionSort(), .X\p;~H 5
new ShellSort(), MIo<sJuv
new QuickSort(), [4"1TyW
new ImprovedQuickSort(), {E-.W"t4
new MergeSort(), t 9&xk?%{
new ImprovedMergeSort(), E0'+]"B
new HeapSort() V&;1n
}; <k<K"{
15+>W4v
public static String toString(int algorithm){ N:GSfM@g
return name[algorithm-1]; ns[v.YDL
} GwQW I]
f.JZ[+
public static void sort(int[] data, int algorithm) { >A5R
impl[algorithm-1].sort(data); 7cW9@xPe
} FRd!UqMXY
!O6e,l
public static interface Sort { {e\Pd!D?|
public void sort(int[] data); u~[HC)4(0
} p4Cw#)BaS
v#0F1a?]D
public static void swap(int[] data, int i, int j) { gyj.M`+y
int temp = data; 0]4kR8R3[
data = data[j]; R*a5bKr
data[j] = temp; )b`Xc+{>
} aDmyr_f$
} Gdmh#pv