[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; UF<|1;'
} *ILS/`mdav
int i1=l; q30WUO;
int i2=mid+1; T-&CAD3 ,O
for(int cur=l;cur<=r;cur++){ ~N[hY1}X[
if(i1==mid+1) CpS'2@6
data[cur]=temp[i2++]; -7ct+3"J
else if(i2>r) /_,~dt
data[cur]=temp[i1++]; j %TYyL-
else if(temp[i1] data[cur]=temp[i1++]; =[{Pw8['
else q22cp&gmX
data[cur]=temp[i2++]; Hh;w\)/%j
} }U'5j/EFZ
} '! 1ts@
;~]&$2sk
} e%bERds
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改进后的归并排序: (%#d._j>fZ
PR|Trnd&D
package org.rut.util.algorithm.support; ?xQlX%&`6
d?N"NqaN
import org.rut.util.algorithm.SortUtil; no?)GQ
pw>AQ
/** zp4ru\
* @author treeroot U_}$QW0'
* @since 2006-2-2 42p6l
* @version 1.0 ~n[LL)v
*/ #C+Gk4"w
public class ImprovedMergeSort implements SortUtil.Sort { A</[Q>8
%hrv~=
private static final int THRESHOLD = 10; Qb|w\xT^Y
?qO,=ms>-
/* YfMe69/0I
* (non-Javadoc) 'EZ[aY!);
* EE}NA{b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }#'KME4
*/ ,;+\!'lS
public void sort(int[] data) { 7Wb.(` a<
int[] temp=new int[data.length]; A^,(Vyd
mergeSort(data,temp,0,data.length-1); {+xUAmd
} u~s'<c+8_
=AD/5E,3
private void mergeSort(int[] data, int[] temp, int l, int r) { %4 SREq
int i, j, k; 3]N}k|lb%
int mid = (l + r) / 2; M8[YW|VkP
if (l == r) @O45s\4-*
return; :m&`bq
if ((mid - l) >= THRESHOLD) ~7 `x9MUc
mergeSort(data, temp, l, mid); C9=f=sGL
else J$e.$ah;
insertSort(data, l, mid - l + 1); K,IOD t
if ((r - mid) > THRESHOLD) N7oMtlvL[w
mergeSort(data, temp, mid + 1, r); J~_p2TZJ\3
else J.<eX=<
insertSort(data, mid + 1, r - mid); EW5S%Y
,xTbt4J
for (i = l; i <= mid; i++) { l m
temp = data; e-e{-pB6
} 5)nv
for (j = 1; j <= r - mid; j++) { }qKeX4\-
temp[r - j + 1] = data[j + mid]; >`{i[60r
} {Y0I A97,
int a = temp[l]; (Wx)YI
int b = temp[r]; Ap!UX=HBb
for (i = l, j = r, k = l; k <= r; k++) { 0H>Fyl2_
if (a < b) { 7_K(xmK
data[k] = temp[i++]; tjd"05"@:
a = temp; vj^UF(X
} else { ZH0f32K
data[k] = temp[j--]; Hzj*X}X#K
b = temp[j]; $AXz/fGV
} %x927I>
} %eV`};9
} `S~u4+y]
3P6'*pZ
/** x.^vWka(
* @param data KbUX(9+B
* @param l @wFm])}0
* @param i Cfi2N V
*/ D46|)-
private void insertSort(int[] data, int start, int len) { d|o"QYX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jSVO$AW~C
} ?s?uoZ /2
} QE#$bCw
} J<BdIKCma
} \ yOZ&qU
4O`h%`M
堆排序： mCE})S
Dq?2mXOqD
package org.rut.util.algorithm.support; SRD&Uf0M
Rke:*(p*n;
import org.rut.util.algorithm.SortUtil; 8@A[`5
:9`1bZ?a
/** IWWFl6$-
* @author treeroot 5o3_x ~e
* @since 2006-2-2 L|Ydd!m
* @version 1.0 E{6}'FG+A
*/ u]2k%TUY
public class HeapSort implements SortUtil.Sort{ [.Y=~)7FB
ho20>vw#
/* (non-Javadoc) = ]@xXVf/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )/ZSb1!
*/ ZF t^q/pw
public void sort(int[] data) { ..T(9]h
MaxHeap h=new MaxHeap(); ]OrFW4tiE
h.init(data); r{TNPa6!
for(int i=0;i h.remove(); x$Oz0[
System.arraycopy(h.queue,1,data,0,data.length); )KuvG:+9W
} ?oJ~3Kg
\\lC"Z#J`
private static class MaxHeap{ R:xmcUq} (
vXvV5Oq
void init(int[] data){ .Ep3~9TBW
this.queue=new int[data.length+1]; lC4By,1*
for(int i=0;i queue[++size]=data; -Q@d
fixUp(size); Jzdc'3dq
} 6~8 RFf"
} *]eZ Y
q kKABow
private int size=0; \l2 s^7G_
oTfbx+i/G
private int[] queue; KC(Ug4
^~aSrREo
public int get() { |pgkl`
return queue[1]; :L[6a>"neE
} vjb?N
m#ie{u^
public void remove() { :mrGB3x{
SortUtil.swap(queue,1,size--); /trc&V
fixDown(1); h+W^k+~(
} O9_YVE/-]
file://fixdown )QE_+H}p
private void fixDown(int k) { 10J*S[n1
int j; (J4utw Z
while ((j = k << 1) <= size) { YXtGuO\q
if (j < size %26amp;%26amp; queue[j] j++; d<Os TA
if (queue[k]>queue[j]) file://不用交换 !LJ.L?9qw
break; J50 ~B3bj`
SortUtil.swap(queue,j,k); %_[-[t3
k = j; ?>y-5B[K/(
} RI(uG-Y
} `Z/IW
private void fixUp(int k) { q KM]wu0Et
while (k > 1) { ?R(3O1,v^
int j = k >> 1; IebS~N E
if (queue[j]>queue[k]) 5);#\&B
break; JqUVGEg
SortUtil.swap(queue,j,k); e%U*~{m+
k = j; .vv*bx
} 8j'*IRj*q
} fh_ .J[Y.k
bIArAS9%
} 8w&rj-
lnDDFsA
} =5ih,>>g
4I-p/&Q
SortUtil： //Gvk|O1
Oi0;.<kX
package org.rut.util.algorithm; JY2 F-0t)
j''Iai_
import org.rut.util.algorithm.support.BubbleSort; ?iX=2-
import org.rut.util.algorithm.support.HeapSort; /;rN/ot2o
import org.rut.util.algorithm.support.ImprovedMergeSort; \V>%yl{8
import org.rut.util.algorithm.support.ImprovedQuickSort; -W_s]oBg
import org.rut.util.algorithm.support.InsertSort; .Y|\7%(
import org.rut.util.algorithm.support.MergeSort; V,+[XB
import org.rut.util.algorithm.support.QuickSort; .m?~TOR
import org.rut.util.algorithm.support.SelectionSort; .( h$@|Y
import org.rut.util.algorithm.support.ShellSort; #Qr4Ke$g[l
JP4Moq~r
/** pQ 6#L
* @author treeroot f~FehN7
* @since 2006-2-2 U!/nD~A
* @version 1.0 NVeRn
*/ FIjET1{
public class SortUtil { @q/1m~t
public final static int INSERT = 1; pK9^WT@
public final static int BUBBLE = 2; 2?T:RB}
public final static int SELECTION = 3; z#VpS=
public final static int SHELL = 4; +Rgw+o
public final static int QUICK = 5; )$B+3f
public final static int IMPROVED_QUICK = 6; !Blk=L+p
public final static int MERGE = 7; o#xg:m_py
public final static int IMPROVED_MERGE = 8; ;a&:r7]=
public final static int HEAP = 9; oKi1=d+T
(AG
public static void sort(int[] data) { r^t{Ii~
sort(data, IMPROVED_QUICK); 1N!g`=}
} X-1Vp_(,TP
private static String[] name={ Z9&D'n)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c@-K
}; 7V{"!V5
66<\i ltUQ
private static Sort[] impl=new Sort[]{ LU,"i^T
new InsertSort(), " ^baiN@ac
new BubbleSort(), i=UTc1
new SelectionSort(), WcwW@cY7\
new ShellSort(), y8vH?^:%<
new QuickSort(), P\4tK<P|
new ImprovedQuickSort(), L"h@`3o|
new MergeSort(), h.$__Gs
new ImprovedMergeSort(), ky[Xf -9#
new HeapSort() Bh,)5E^m
}; kc'0NE4oq
En9]x"_
public static String toString(int algorithm){ \TB%N1^
return name[algorithm-1]; SMO%sZ]
} 2 dD<]
0?us]lx
public static void sort(int[] data, int algorithm) { {[5L96RH%
impl[algorithm-1].sort(data); SP*JleQN
} 'ZH<g8:=@
(kQ.tsl
public static interface Sort { (+LR u1z
public void sort(int[] data); 0BB@E(*
} rm=~^eB
:{s%=\k {d
public static void swap(int[] data, int i, int j) { Q|B|#?E==
int temp = data; ; eF4J
data = data[j]; Rca Os
data[j] = temp; [Z#.]gb
} Qf-k&d
} V$<G)dwUG5