[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; 7 m&M(ct
} a|5GC pp
int i1=l; WLNkO^zb
int i2=mid+1; +zs;>'Sf
for(int cur=l;cur<=r;cur++){ <g,k[
if(i1==mid+1) O(/K@e
data[cur]=temp[i2++]; 1WcT>_$
else if(i2>r) 5jy>)WqK
data[cur]=temp[i1++]; QsDab4
else if(temp[i1] data[cur]=temp[i1++]; vD1jxk'fd
else Aid{PGDk
data[cur]=temp[i2++]; ,i*^fpF`F"
} 0,m*W?^31
} yQ+#Tlji
m98k/w_
} EE&~D~yHUL
,)GCg@7B
改进后的归并排序: xvp{F9~qT
#JuO
package org.rut.util.algorithm.support; 'L3 \I
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import org.rut.util.algorithm.SortUtil; [rPW@|^5
TmX~vZ
/** ,[Cl'B
* @author treeroot o?p) V^7
* @since 2006-2-2 }tv-
* @version 1.0 `p#A2ApA
*/ *TE6p
public class ImprovedMergeSort implements SortUtil.Sort { 7GK| A{r
qg.[M*
private static final int THRESHOLD = 10; !h&hPY1
6tG9PG98q9
/* ,=oq)Fm]
* (non-Javadoc) A7|"0*62
* pb E`Eq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .D4D!!
*/ $!obpZ~}
public void sort(int[] data) { ^5,ASU
int[] temp=new int[data.length]; -+Q,xxu
mergeSort(data,temp,0,data.length-1); '`[nt25N
} Fl*@@jQ8cV
[(btpWxb^
private void mergeSort(int[] data, int[] temp, int l, int r) { kmov(V
int i, j, k; Q `E{Oo,
int mid = (l + r) / 2; %Si3t2W/
if (l == r) zG& N5t96X
return; %$]u6GKabi
if ((mid - l) >= THRESHOLD) h.2!d0j]
mergeSort(data, temp, l, mid); \=yg@K?"AJ
else SfL,_X]*
insertSort(data, l, mid - l + 1); uVscF 4
if ((r - mid) > THRESHOLD) >%[(C*Cks
mergeSort(data, temp, mid + 1, r); ?m?e2{]u,
else _FdWV?
insertSort(data, mid + 1, r - mid); }clFaT>m?
`GPK$ue
for (i = l; i <= mid; i++) { Qr0JJoHT
temp = data; JxD@y}ZYE
} 'Fc&"(!||
for (j = 1; j <= r - mid; j++) { X% _~9'#%
temp[r - j + 1] = data[j + mid]; 3\D jV2t
} 5>A3;P
int a = temp[l]; iNQk{n
int b = temp[r]; $(zJ
for (i = l, j = r, k = l; k <= r; k++) { 1Kc*MS
if (a < b) { f4g(hjETbu
data[k] = temp[i++]; 4,<~t>M1
a = temp; +p<Y)Z(>6
} else { /;.M$}Z>`
data[k] = temp[j--]; P9%9/ B:-
b = temp[j]; ]"CAP%
} }JlQQ
} z>y,}#D?C
} Vx0V6{JX
n:<avl@o<
/** {v`wQM[
* @param data CSsb~/Oxu
* @param l t 8M3VGN
* @param i `b7o
*/ 8o{ SU6pH
private void insertSort(int[] data, int start, int len) { f"-<Z_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w$B7..r
} ;[9cj&7C<
} Y$Uvt_
} 1km=9[;w'
} %0u7pk
h/_z QR-
堆排序： !J2Lp
d[$1:V
package org.rut.util.algorithm.support; ^R<= }
y"9TS,lmK
import org.rut.util.algorithm.SortUtil; 9Hc#[Ml
k8*=1kl"
/** 8g0& (9<)
* @author treeroot w[|!$J?
* @since 2006-2-2 }%XNB1/`
* @version 1.0 'QW 0K]il
*/ }y[o[>
public class HeapSort implements SortUtil.Sort{ {O^1WgGc[
5 !NPqka}.
/* (non-Javadoc) #bdJ]v.n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5Cz:$-+
*/ =6A<>
public void sort(int[] data) { T+.wJW:jh
MaxHeap h=new MaxHeap(); VUt 6[~?
h.init(data); Y0eu^p)
for(int i=0;i h.remove(); !8A5Y[(XD
System.arraycopy(h.queue,1,data,0,data.length); H"&N<"hw
} [yVU p+
<B``/EX^
private static class MaxHeap{ u?'X%'K*
d+^4;Hv4
void init(int[] data){ JTs.NY <z
this.queue=new int[data.length+1]; fi,=z
for(int i=0;i queue[++size]=data; 94lmsE
fixUp(size); L$ ON=$q5
} Nvew^c)x
} f9\7v_
E=x\f "Z
private int size=0; H+: $ 7;
5?I]\Tb
private int[] queue; Icr'l$PE
QR8F'7S
public int get() { d5],O48A
return queue[1]; .g|pgFM?
} om/gk4S2
$8eq&_gJ
public void remove() { f'.yM*
SortUtil.swap(queue,1,size--); j<gnh
fixDown(1); }3i@5ctQ
} :#|77b0
file://fixdown \NSwoP
private void fixDown(int k) { $jntT(V
int j; ,Y5+UzE@
while ((j = k << 1) <= size) { )1i)I?m
if (j < size %26amp;%26amp; queue[j] j++; O'mX7rY<<(
if (queue[k]>queue[j]) file://不用交换 C<7J5
break; ! TRiFD
SortUtil.swap(queue,j,k); %-SP
k = j; ~&qe"0
} I7Eg$J&
} M1g|m|H7
private void fixUp(int k) { '"KK|]vJ
while (k > 1) { U{_O=S u
int j = k >> 1; WW_X:N~~e\
if (queue[j]>queue[k]) c,-< 4e
break; nh8h?&q|
SortUtil.swap(queue,j,k); ]v#T'<Nl
k = j; 6zI?K4o
} ?IWLl
} L NE]#8ue
{&4qknPd%
} $Z,+aLmb
Q^F-8
} UU !I@
!#?tA/t@
SortUtil： < xV!vN
v>e4a/
package org.rut.util.algorithm; +HcH]D;
m[7a~-3:J
import org.rut.util.algorithm.support.BubbleSort; $i2gOz
import org.rut.util.algorithm.support.HeapSort; IQ~()/;3d
import org.rut.util.algorithm.support.ImprovedMergeSort; >/n/n{{
import org.rut.util.algorithm.support.ImprovedQuickSort; w5|"cD#8A
import org.rut.util.algorithm.support.InsertSort; vTP_vsdeG
import org.rut.util.algorithm.support.MergeSort; )a6i8b3
import org.rut.util.algorithm.support.QuickSort; |On6?5((e
import org.rut.util.algorithm.support.SelectionSort; mPh;
import org.rut.util.algorithm.support.ShellSort; LnL<WI*Pq
H_2hr[
/** <zUmcZ
* @author treeroot TRiB|b]8Q#
* @since 2006-2-2 +GGj*sD
* @version 1.0 \"*l:x-u
*/ dEL>Uly
public class SortUtil { !Zwl9DX3
public final static int INSERT = 1; jBQQ?cA
public final static int BUBBLE = 2; N" 8o0>
public final static int SELECTION = 3; aL`pvsnF
public final static int SHELL = 4; t3WlVUtq3
public final static int QUICK = 5; L\B+j+~
public final static int IMPROVED_QUICK = 6; ]x Kmz
public final static int MERGE = 7; YA|*$$
public final static int IMPROVED_MERGE = 8; %NBD^gF
public final static int HEAP = 9; ;L)}blN.
[WK_Vh{
public static void sort(int[] data) { W%wS+3Q/
sort(data, IMPROVED_QUICK); n}+ DO6J
} p\HXE4d'
private static String[] name={ IW46-;l7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" k^L (q\D
}; jC@^/rMh
l)|CPSN?w
private static Sort[] impl=new Sort[]{ =1,g#HS
new InsertSort(), FJ!>3V;}
new BubbleSort(), <FJ#Hy+
new SelectionSort(), qzLRA.#f^
new ShellSort(), X}Csl~W8in
new QuickSort(), byMO&Lb*
new ImprovedQuickSort(), r9%W?fEBp
new MergeSort(), _Nj;Ni2rD
new ImprovedMergeSort(), "K@os<
new HeapSort() v ;9s
}; W,<Vr2J[
v3/cNd3
public static String toString(int algorithm){ QO k%Q$^G
return name[algorithm-1]; B;@yOm=
} RDZq(rKc
m ;KP
public static void sort(int[] data, int algorithm) { uaGg8
impl[algorithm-1].sort(data); Ff,M~zn
} (&B & V
b)V[d8IA
public static interface Sort { Gq{v)iN
public void sort(int[] data); 0s8S`hCn>
} oYF8:PYB
bZi>
public static void swap(int[] data, int i, int j) { tQ/w\6{
int temp = data; mI.*b(Irp
data = data[j]; I?PKc'b
data[j] = temp; GM%|mFqeu
} J+;.t&5R
} lH6t d