[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; F@mxd
} L|B! ]}
int i1=l; zrf tF2U
int i2=mid+1; UuC-R)
for(int cur=l;cur<=r;cur++){ VfUHqdg-
if(i1==mid+1) $Ggnn#
data[cur]=temp[i2++]; 3W{!\
else if(i2>r) nLx|$=W
data[cur]=temp[i1++]; 6OoOkNWF
else if(temp[i1] data[cur]=temp[i1++]; 6b9J3~d\E
else ;#9ioGx
data[cur]=temp[i2++]; %>5>wP
} I?^(j;QpS
} .h\Py[h<^
|>Fz:b d
} (][-()YV
x=+>J$~Pb
改进后的归并排序: xP/q[7>#Q
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package org.rut.util.algorithm.support; v\_\bT1
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import org.rut.util.algorithm.SortUtil; e\O-5hp7
yDWBrN._
/** #sxv?r
* @author treeroot { {:Fs
* @since 2006-2-2 %ZX9YuXQ
* @version 1.0 :(wFNK/0{
*/ a=`] L`|N
public class ImprovedMergeSort implements SortUtil.Sort { /0$fYrg>J
OzwJ 52
private static final int THRESHOLD = 10; \j5`6}zm
-m@PqJF^
/* "eqzn KT%u
* (non-Javadoc) 'GT^araz
* '#=0q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *,IK4F6>:
*/ - Ry+WS=
public void sort(int[] data) { ;<_a ,5\Q
int[] temp=new int[data.length]; r)OiiD"
mergeSort(data,temp,0,data.length-1); -/V(Z+dj
} E AZX
[cco/=c
private void mergeSort(int[] data, int[] temp, int l, int r) { lcy<taNu)
int i, j, k; DR,7rT{$
int mid = (l + r) / 2; '#h ORQB
if (l == r) 5-y*]:g(
return; r/HTkXs I
if ((mid - l) >= THRESHOLD) O6vxp?:^
mergeSort(data, temp, l, mid); /|<SD.:
else =,h'}(z_
insertSort(data, l, mid - l + 1); [`s0 L#
if ((r - mid) > THRESHOLD) j--byk6PB
mergeSort(data, temp, mid + 1, r); 6B|i-b$~
else :`Ut.E~.
insertSort(data, mid + 1, r - mid); ,.}%\GhY
j/fniyJ)
for (i = l; i <= mid; i++) { %ek0NBE7
temp = data; nO!&;E&
} RV);^, b
for (j = 1; j <= r - mid; j++) { ar6+n^pi0]
temp[r - j + 1] = data[j + mid]; |cgjn*a?M
} k!}(a0h
int a = temp[l]; 8A.7q
int b = temp[r]; EmR82^_:
for (i = l, j = r, k = l; k <= r; k++) { d~QM@<SV
if (a < b) { w;j<$<4=7
data[k] = temp[i++]; >TY;l3ew
a = temp; _U-`/r o
} else { 9}m?E<6&
data[k] = temp[j--]; @!u{>!~0
b = temp[j]; +L`}(yLJ)9
} I:G8B5{J
} {-8Nq`w
} ^D6TeH
goA=U
/** elQjPvb
* @param data Z\xnPhV
* @param l yCav;ZS_
* @param i `lWGwFgg(
*/ I`H&b& .`
private void insertSort(int[] data, int start, int len) { 8V 4e\q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xPPA8~Dm*
} Y0T:%
} W/hzo*o'g
} r)>3YM5
} v_Sa0}K9
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堆排序： 8FMxn{k2
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package org.rut.util.algorithm.support; KFwuz()7
_uLpU4# ?
import org.rut.util.algorithm.SortUtil; ?]$<Ufr
<%Nf"p{K
/** 0NGth(2
* @author treeroot GIH{tr1:<
* @since 2006-2-2 cWZITT{A
* @version 1.0 nJ]7vj,rB
*/ _.Hj:nFHz
public class HeapSort implements SortUtil.Sort{ |+W{c`KL
GEF's#YWK
/* (non-Javadoc) Z@Zg3AVU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]tN)HRk1
*/ `G1"&q,i
public void sort(int[] data) { q i yK
MaxHeap h=new MaxHeap(); ch]Qz[d
h.init(data); DxNob-Fr
for(int i=0;i h.remove(); k>mXh{(
System.arraycopy(h.queue,1,data,0,data.length); z+7V}aPM
} pxgf%P<7
R}gdN-941
private static class MaxHeap{ c-(RjQ~M5
N,-C+r5}<4
void init(int[] data){ &gY578tU
this.queue=new int[data.length+1]; r=0PW_r:
for(int i=0;i queue[++size]=data; |ugdl|f
fixUp(size); 5>.ATfAsV
} Ie/_gz^
} gfj_]
CLzF84@W=
private int size=0; ) hs&?:)
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private int[] queue; jq%<Z,rh
H\oxj,+N
public int get() { ]jxyaE&%4
return queue[1]; jH9PD8D\
} @i!+Z
<Y7j'n
public void remove() { /~u^@@.
SortUtil.swap(queue,1,size--); +bLP+]7oZ
fixDown(1); =o~+R\1ux+
} yO7y`;Q(sF
file://fixdown nt$PA(Y
private void fixDown(int k) { En9J7es_
int j; X-(( [A
while ((j = k << 1) <= size) { 81x/bx@L%
if (j < size %26amp;%26amp; queue[j] j++; :XFQ}Cl
if (queue[k]>queue[j]) file://不用交换 LF!KP
break; \O"H#gt
SortUtil.swap(queue,j,k); m`-:j"]b$
k = j; =K}Pfh
} PL&>pM
} pLCj"D).M
private void fixUp(int k) { gi,7X\`KQ
while (k > 1) { 8xAIn>,_
int j = k >> 1; oQ r.cKD ?
if (queue[j]>queue[k]) STjb2t,a
break; d.~ns4bt9
SortUtil.swap(queue,j,k); A?#i{R
k = j; xjbI1qCfe
} 9nc_$H{
} H"? 5]!p
#;a+)~3*O
} hzr, %r
_]o7iqtv
} iXo;e
VQH48{X
SortUtil： Xydx87L/-e
/!5ohQlPJ
package org.rut.util.algorithm; PWl;pBo
Lm=EN%*#9
import org.rut.util.algorithm.support.BubbleSort; ]^>Inh!
import org.rut.util.algorithm.support.HeapSort; #BP0MY&
import org.rut.util.algorithm.support.ImprovedMergeSort; "KK}}$>
import org.rut.util.algorithm.support.ImprovedQuickSort; }C_g;7*
import org.rut.util.algorithm.support.InsertSort; a%m )8N;C
import org.rut.util.algorithm.support.MergeSort; 5*Zz_ .
import org.rut.util.algorithm.support.QuickSort; ^2$b8]q
import org.rut.util.algorithm.support.SelectionSort; )yb~ kbe
import org.rut.util.algorithm.support.ShellSort; mvT/sC7I
~3j+hN8<
/** oCOv 6(
* @author treeroot 5l8F.LtO\
* @since 2006-2-2 L]z8'n,
* @version 1.0 YT!iI
*/ @-S7)h>~
public class SortUtil { :2c(.-[`
public final static int INSERT = 1; 6/L[`n"G
public final static int BUBBLE = 2; _VdJFjY?zc
public final static int SELECTION = 3; Z72%Bv
public final static int SHELL = 4; c!6v-2ykv
public final static int QUICK = 5; ]lfufjj
public final static int IMPROVED_QUICK = 6; 7=fNvES2
public final static int MERGE = 7; xI?'Nh
public final static int IMPROVED_MERGE = 8; 9?ll(5E
public final static int HEAP = 9; A]0R?N9wb_
H4 O"^#5
public static void sort(int[] data) { jbS@6 *_
sort(data, IMPROVED_QUICK); h/\Zq
} q[qX O5
private static String[] name={ 8BAe6-*S8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" s-Gd{=%/q
}; ;q9Y%*
{= &&J@:
private static Sort[] impl=new Sort[]{ n Yx[9HN
new InsertSort(), `Z>=5:+G@2
new BubbleSort(), F%y#)53g
new SelectionSort(), :* |WE29U
new ShellSort(), =3'B$PY
new QuickSort(), 1N$OXLu
new ImprovedQuickSort(), { /!ryOA65
new MergeSort(), igTs[q=Ak
new ImprovedMergeSort(), ^E\4`
new HeapSort() a] c03$fK
}; ,/p+#|>C=
Ou4hAm91s
public static String toString(int algorithm){ ,ov$`v
return name[algorithm-1]; OjffN'a+N
} -:_3N2U=+
b)Nd}6}<?
public static void sort(int[] data, int algorithm) { aU.3
impl[algorithm-1].sort(data); %u9Q`
} Mj>QV(L8t
e/g9r
public static interface Sort { 6bj77CoB
public void sort(int[] data); fI;nVRfp
} 8SroA$^n
"kcix!}&
public static void swap(int[] data, int i, int j) { [Y`E"1f2
int temp = data; lQ^"-zO4
data = data[j]; *N ~'0"#
data[j] = temp; ~u0<c:C^
} /<T{g0s
} w]xr ~D+