[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; b,KcBQ.
} *!^<m0
int i1=l; M`6y@<
int i2=mid+1; u !!X6<
for(int cur=l;cur<=r;cur++){ :UJa&$)
if(i1==mid+1) wCk~CkC?
data[cur]=temp[i2++]; y*MF&mQ[
else if(i2>r) f@co<iA
data[cur]=temp[i1++]; 7mm1P9Z
else if(temp[i1] data[cur]=temp[i1++]; f-nz{U
else Y'e eA 2O
data[cur]=temp[i2++]; x1 1U@jd+1
} )*c>|7G
} <w\:<5e'
"[:iXRu
} k<+0o))
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改进后的归并排序: ^fz+41lE\
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package org.rut.util.algorithm.support; NAPX_B,6
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import org.rut.util.algorithm.SortUtil; ZIdA\_c
fb da
/** LSQz"Ll l
* @author treeroot TY(bPq
* @since 2006-2-2 r]ShZBAbYp
* @version 1.0 U.{l;EL:T
*/ Ma|qHg
public class ImprovedMergeSort implements SortUtil.Sort { I}2P>)K
)!tK[K?5
private static final int THRESHOLD = 10; aTBR|US
,C {*s$
/* ](F#`zUQ
* (non-Javadoc) B^%1Rpcn
* -+t]15
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *%vwM7
*/ >3u]OSb
public void sort(int[] data) { Dz./w
int[] temp=new int[data.length]; TE )gVE]
mergeSort(data,temp,0,data.length-1); N$[$;Fm:
} lgpW@g
7OWbAu;
private void mergeSort(int[] data, int[] temp, int l, int r) { =+w*gDr
int i, j, k; ;L&TxO>#J
int mid = (l + r) / 2; jgS%1/&
if (l == r) ]59i>
return; T;L>P[hNn
if ((mid - l) >= THRESHOLD) hm<}p&!J
mergeSort(data, temp, l, mid); N8`?t5
else /*Qq[C
insertSort(data, l, mid - l + 1); XlI!{qj|
if ((r - mid) > THRESHOLD) R}mn*h6
mergeSort(data, temp, mid + 1, r); ^s.V;R
else mZIoaF>t
insertSort(data, mid + 1, r - mid); n&MG7`]N
Z!0]/mCE8
for (i = l; i <= mid; i++) { lcV<MDS
temp = data; ET];%~ ^
} &uUo3qXQ5l
for (j = 1; j <= r - mid; j++) { >yJ9U,Y
temp[r - j + 1] = data[j + mid]; Ap{}^
} G|8%qd
int a = temp[l]; .WQ<jZt>
int b = temp[r]; ,<DB&&EV8
for (i = l, j = r, k = l; k <= r; k++) { (z$r:p
if (a < b) { ~ d^<_R
data[k] = temp[i++]; ;6 +}z~
a = temp; 6n1rL
} else { 20rkKFk*
data[k] = temp[j--]; {G*A.$-d
b = temp[j]; ceGa([#!\_
} e4FM} z[
} PM":Vd/
} )6~1 ^tD
d3^OEwe
/** rw)kAe31
* @param data v+"rZ
* @param l '&;yT[
* @param i aQ j*KMc
*/ rwIeqV{:
private void insertSort(int[] data, int start, int len) { i*R,QN)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 80M;4nH^5
} R_sC! -
} kj5Q\vr)
} .lhn;*Yi
} ^[Cv26
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堆排序： 5BR5X\f0
w#i[_
package org.rut.util.algorithm.support; ZDL']*)'
U}Hwto`R
import org.rut.util.algorithm.SortUtil; x]5@>5
g/UaYCjM
/** Y,8KPg@W
* @author treeroot P\CDd=yWc
* @since 2006-2-2 0tk#Gs[
* @version 1.0 VCy5JH
*/ I &*_,d
public class HeapSort implements SortUtil.Sort{ gfU-"VpHE
&/.hx(#d
/* (non-Javadoc) VE2tq k%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;DnUQj
*/ G= ^X1+_
public void sort(int[] data) { +*oS((0s
MaxHeap h=new MaxHeap(); d+iR/Ssc
h.init(data); /9yaW7w
for(int i=0;i h.remove(); S'~o,`xy
System.arraycopy(h.queue,1,data,0,data.length); <*H^(0
} uR6w|e`
;jK#[*y
private static class MaxHeap{ }_QKJw6/"
f^e6<5gdf
void init(int[] data){ ^5=UK7e5KY
this.queue=new int[data.length+1]; sM1RU
for(int i=0;i queue[++size]=data; EPW7+Ve
fixUp(size); *s}|Hy
} o A*G
} K7I&sS^x
+a= 0\lpOy
private int size=0; #n\C |
Uh.Zi3X6}6
private int[] queue; y%]8'q$
N12:{U
public int get() { "%8A:^1
return queue[1]; A{o'z_zC
} uQLlA&I"
Y^"4?96
public void remove() { m8+(%>+7
SortUtil.swap(queue,1,size--); l^NC]t
fixDown(1); D}Ilyk_uUw
} F="z]C;u
file://fixdown V%HS\<$h
private void fixDown(int k) { 'k&?DZ!
int j; 7dh1W@\
while ((j = k << 1) <= size) { ~$O1`IT
if (j < size %26amp;%26amp; queue[j] j++; 'UM!*fk7C
if (queue[k]>queue[j]) file://不用交换 SN+S6
break; Jeqxspn T
SortUtil.swap(queue,j,k); @E`?<|B}
k = j; -jg (GGJ
} /7$mxtB5%L
} j&6 jRX
private void fixUp(int k) { &;H{cv`
while (k > 1) { Iy {U'a!
int j = k >> 1; FgA//)1
if (queue[j]>queue[k]) dTEJ=d40
break; 5T4"j;_.BL
SortUtil.swap(queue,j,k); jj\[7 O*
k = j; {gf>*
} e{G_GycH
} PX".Km p.
wCZO9sU:6=
} QL"gWr`R
D_|B2gdZY
} hQJWKAf,/
a!Yb1[
SortUtil： P#GD?FUc
AZFWuPJo
package org.rut.util.algorithm; |U[y_Y\a
#_Ea[q7v
import org.rut.util.algorithm.support.BubbleSort; r -f
import org.rut.util.algorithm.support.HeapSort; 0rMqWP
import org.rut.util.algorithm.support.ImprovedMergeSort; .")b?#K
import org.rut.util.algorithm.support.ImprovedQuickSort; PB~_I=
import org.rut.util.algorithm.support.InsertSort; &yH#s 8^8
import org.rut.util.algorithm.support.MergeSort; MQcE6)
import org.rut.util.algorithm.support.QuickSort; 5{>0eFzG
import org.rut.util.algorithm.support.SelectionSort; 0yof u
import org.rut.util.algorithm.support.ShellSort; i%(yk#=V
`rWB`q|i<
/** (b/d0HCND
* @author treeroot &jts:^N>
* @since 2006-2-2 #dJ 2Q_2
* @version 1.0 _=`x])mM
*/ o0;7b>Tv
public class SortUtil { z<C[nR$N
public final static int INSERT = 1; +h[e0J|v{
public final static int BUBBLE = 2; p?rK`$U+J
public final static int SELECTION = 3; cV$lobqO
public final static int SHELL = 4; L@|#Bbmx
public final static int QUICK = 5; y{rn-?`{
public final static int IMPROVED_QUICK = 6; C@dGWAG
public final static int MERGE = 7; F%6*Df;cSe
public final static int IMPROVED_MERGE = 8; 5ouQQ)vA
public final static int HEAP = 9; qR,.W/eS8
*M!kA65'
public static void sort(int[] data) { `ENP=kL(+
sort(data, IMPROVED_QUICK); P!\hnm)%4
} lC9S\s
private static String[] name={ I{n;4?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jW5iqU"{*
}; +BB0wY
q@Kk\m
private static Sort[] impl=new Sort[]{ @[r={s\
new InsertSort(), dt-K
new BubbleSort(), QJ<[Zx
new SelectionSort(), (-(*XNC
new ShellSort(), H/i<_LP
new QuickSort(), <Ry$7t,
new ImprovedQuickSort(), u7k|7e=xk
new MergeSort(), Vq}r_#!Q
new ImprovedMergeSort(), G:+16XCra
new HeapSort() 7~.ZE
}; {;RF
^tE_LL+ji|
public static String toString(int algorithm){ ZH-5Qy_
return name[algorithm-1]; *caLN,G
} iPU% /_>
/_OOPt=G
public static void sort(int[] data, int algorithm) { [,7-w
impl[algorithm-1].sort(data); UD*+"~
} aW`dFitpM
a>b8-j=J
public static interface Sort { [-VGArD[k,
public void sort(int[] data); "|4jPza
} gB+ G'I
``-k{C#F
public static void swap(int[] data, int i, int j) { ^g]xU1] *
int temp = data; =x4a~=HX
data = data[j]; 9--dRTG
data[j] = temp; =h\E<dw
} b?k4InXh
} a%n'%*0