[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; gynh#&r
} uIZWO.OdU
int i1=l; !A%<#Gjt
int i2=mid+1; rylzcN9RM$
for(int cur=l;cur<=r;cur++){ M}!2H*
if(i1==mid+1) PiA0]>
data[cur]=temp[i2++]; HF(KN{0.B
else if(i2>r) 3d|9t9v
data[cur]=temp[i1++]; YQY%M>F@d%
else if(temp[i1] data[cur]=temp[i1++]; :^(>YAyHj^
else Qf@
data[cur]=temp[i2++]; D::rGB?.b
} G\(|N9^:
} 8(* [Fe9
F8apH{&t
} 50={%R
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改进后的归并排序: p/h Rk<K6
sM9+dh
package org.rut.util.algorithm.support; ,TFIG^Dvq
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import org.rut.util.algorithm.SortUtil; p|]\P%,\
L`24?Y{
/** J_;o|gqX
* @author treeroot ? YG)I;(
* @since 2006-2-2 |iwP:C^\mJ
* @version 1.0 _]:z \TDn
*/ #_u~/jhX
public class ImprovedMergeSort implements SortUtil.Sort { V5rST +
KY~-;0x
private static final int THRESHOLD = 10; BT(CM,bp
G["c\Xux
/* w`5xrqt@
* (non-Javadoc) Ih"XV
* Sm5H_m!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ' MxrQ;|S
*/ vuYSVI2=H
public void sort(int[] data) { O6OP =K!t:
int[] temp=new int[data.length]; {E8~Z8tT
mergeSort(data,temp,0,data.length-1); VX1-JxY
} \P6$mh\T
15sp|$&`
private void mergeSort(int[] data, int[] temp, int l, int r) { >:b Q
int i, j, k; @/31IOIV]`
int mid = (l + r) / 2; ^- d%r
if (l == r) -(=eM3o-9m
return; 3p'I5,}
if ((mid - l) >= THRESHOLD) ^N)R=tl
mergeSort(data, temp, l, mid); gdQvp=v]
else zOiu5
insertSort(data, l, mid - l + 1); 1Yn +<I
if ((r - mid) > THRESHOLD) S.f5v8
mergeSort(data, temp, mid + 1, r); Pjc Tx +
else .qZI$ l.
insertSort(data, mid + 1, r - mid); f=9|b
qXwPDq/
for (i = l; i <= mid; i++) { &mx)~J^m
temp = data; Dg?:/=,=9r
} v'3J.?N
for (j = 1; j <= r - mid; j++) { .yEBOMNZ
temp[r - j + 1] = data[j + mid]; 7yh/BZ1
} @qYp>|AF
int a = temp[l]; [;J>bi;3N
int b = temp[r]; @ rc{SB
for (i = l, j = r, k = l; k <= r; k++) { %B.yW`,X
if (a < b) { %xyou:~0zs
data[k] = temp[i++]; K9up:.{QQ
a = temp; N=7pK&NHSG
} else { k-^mIJo}
data[k] = temp[j--]; 5f 5f0|ok
b = temp[j]; :w^Ed%>y7
} #e$5d>j(
} ]'=)2 .}
} W}mn}gTQ
>: g3k
/** R)m'lMi|
* @param data D-._z:_
* @param l +O?KNZ
* @param i 7](KV"%V
*/ Xx>X5Fy
private void insertSort(int[] data, int start, int len) { OL^l 3F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V: TM]
} L bmawi^
} JVSA&c%3
} @pRlxkvV
} g0["^P1tV
m3/O.DY%0
堆排序： m()RU"WY
ElW~48
package org.rut.util.algorithm.support; ,tu.2VQc@
|$ lM#Ua
import org.rut.util.algorithm.SortUtil; @X;!92i
/k,-P
/** kZGRxp9
* @author treeroot Tq[kl'_
* @since 2006-2-2 0i\M,TNf*
* @version 1.0 fO[+LR 'ax
*/ 2`N,,
public class HeapSort implements SortUtil.Sort{ I$Op:P6.E
Zm_UR*"
/* (non-Javadoc) 8&qZ0GLaT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?q{,R"
*/ LQRQA[^
public void sort(int[] data) { j~jV'f.:H
MaxHeap h=new MaxHeap(); =*c7i]@}
h.init(data); .7avpOfz
for(int i=0;i h.remove(); #PH~1`vl
System.arraycopy(h.queue,1,data,0,data.length); IS&ZqE(`e
} NUWDc]@J*
=k^Y?.
private static class MaxHeap{ po2!
UMm!B`M
void init(int[] data){ biU^[g("
this.queue=new int[data.length+1]; -7@/[9Gf`:
for(int i=0;i queue[++size]=data; zGkS^Z=(
fixUp(size); |8l<$J
} @v)p<r^M">
} D"2&P^-
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private int size=0; L>aLqQ3
YSic-6z0Ms
private int[] queue; lJ}_G>GJ
DpvI[r//'*
public int get() { L(|N[#
return queue[1]; c]n1':FT"
} 1Vrh4g.l
QLvHQtzwX
public void remove() { J$GUB3 G
SortUtil.swap(queue,1,size--); 1VG4S){}\9
fixDown(1); Uyg5i[&X@
} aJbO((%$|u
file://fixdown ~-_kM
private void fixDown(int k) { 4gz H8sF
int j; "!ug_'VW
while ((j = k << 1) <= size) { [6%VRqY
if (j < size %26amp;%26amp; queue[j] j++; %InA+5s`
if (queue[k]>queue[j]) file://不用交换 c4^ks&)'
break; 9.gXzPH
SortUtil.swap(queue,j,k); 4~Vx3gEV:
k = j; =JK@z
} g9}DnCT*.
} /_AnP
private void fixUp(int k) { 4C61GB?Vy
while (k > 1) { NV72
int j = k >> 1; !sQY&*
if (queue[j]>queue[k]) |Mup8(gCk
break; [B#R94
SortUtil.swap(queue,j,k); 'MUv5Th
k = j; 4ew" %Cs*
} bYpntV
} t^R][Ay&
bnq;)>&
} 'g=
ODNM+#}`
} pN:Kdi
bpJ(XN}E
SortUtil： [q)8N
Ln')QN
package org.rut.util.algorithm; t{^*6XOcJ
|ef7bKU8
import org.rut.util.algorithm.support.BubbleSort; eTI%^d|
import org.rut.util.algorithm.support.HeapSort; [!HEQ8 2g
import org.rut.util.algorithm.support.ImprovedMergeSort; "GMBjT8
import org.rut.util.algorithm.support.ImprovedQuickSort; }Gz~nf%
import org.rut.util.algorithm.support.InsertSort; B}Z63|/N
import org.rut.util.algorithm.support.MergeSort; MDhRR*CBh
import org.rut.util.algorithm.support.QuickSort; |:q=T ~x
import org.rut.util.algorithm.support.SelectionSort; v7BA[jQr
import org.rut.util.algorithm.support.ShellSort; jnKWZ/R
rb5~XnJk
/** J%v=yBC2
* @author treeroot z;{iM/Xe
* @since 2006-2-2 TN!j13,
* @version 1.0 U\4g#!qj
*/ `#F{Waww'
public class SortUtil { ww\CQ6/h
public final static int INSERT = 1; l&OKBUG
public final static int BUBBLE = 2; [842&5Pd?
public final static int SELECTION = 3; DBW[{DE
public final static int SHELL = 4; QRc{vUR&
public final static int QUICK = 5; w28o}$b`
public final static int IMPROVED_QUICK = 6; @=bLDTx;c)
public final static int MERGE = 7; A!s`[2 Z
public final static int IMPROVED_MERGE = 8; jSh5!6O
public final static int HEAP = 9; ddJQC|xR}
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public static void sort(int[] data) { l2zFKCGF(
sort(data, IMPROVED_QUICK); @Owb?(6?
} cs,N <|
private static String[] name={ +%zAQeb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7E r23Q
}; V+* P2|
q8X feoUV
private static Sort[] impl=new Sort[]{ ]fx"4qKM
new InsertSort(), T*8VDY7
new BubbleSort(), >BIMi^
new SelectionSort(), f=(?JT
new ShellSort(), q@QksAq
new QuickSort(), tX9{hC^
new ImprovedQuickSort(), 5gH1.7i b
new MergeSort(), 0Is,*Srr
new ImprovedMergeSort(), kw>v:F<M
new HeapSort() 7`-Zuf
}; 6Z>FTz_
!o5 W
public static String toString(int algorithm){ nOt&pq7
return name[algorithm-1]; CY 4gSe?
} 5gb|w\N>
04LI]'
public static void sort(int[] data, int algorithm) { B-?6M6#
impl[algorithm-1].sort(data); aGrIQq/k)%
} oI0M%/aM
*;l]8.
public static interface Sort { &vo--V1|
public void sort(int[] data); iqC|G/
} hEA<o67
opY@RJ]
public static void swap(int[] data, int i, int j) { 6_J$UBT
int temp = data; y~Bh
data = data[j]; h%o%fH&F!
data[j] = temp; 8qk?E6
} Nh8Q b/::
} v0 nj M