[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; [ad@*KFxy3
} U[SaY0Z
int i1=l; I`p+Qt
int i2=mid+1; wN`jE0 {
for(int cur=l;cur<=r;cur++){ ]j'p :v
if(i1==mid+1) T@G?t0
data[cur]=temp[i2++]; i'4B3
else if(i2>r) w,w{/T+B
data[cur]=temp[i1++]; !6BW@GeF]
else if(temp[i1] data[cur]=temp[i1++]; :ZTc7}
else g,}_G3[j0m
data[cur]=temp[i2++]; ^oVs+vC
} ;-9=RI0
} $eD.W
F5?m6`g?
} 'd.EC#
vtw6FX_B
改进后的归并排序: =G]1LTI
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package org.rut.util.algorithm.support; s}j{#xT
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import org.rut.util.algorithm.SortUtil; 21 O'M
.P;*Dws
/** .uuO>:
* @author treeroot /s?r`'j[
* @since 2006-2-2 uv=.2U46
* @version 1.0 }E0,z
*/ iTFdN}U
public class ImprovedMergeSort implements SortUtil.Sort { )0ea+ib
(5#nrF]
private static final int THRESHOLD = 10; 0*rQ3Z
N03HQp)g
/* (&}i`}v_
* (non-Javadoc) ,a gc
* qDv93
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9F4Dm*_<
*/ sArhZ[H
public void sort(int[] data) { Y<mej][
int[] temp=new int[data.length]; s>0't
mergeSort(data,temp,0,data.length-1); T,]7ICF#
} j/>$,
,8:(OB|a
private void mergeSort(int[] data, int[] temp, int l, int r) { ?3*l{[@J
int i, j, k; z54EG:x.7^
int mid = (l + r) / 2; /e7O$L)
if (l == r) 7Bb9t
return; v5By:z
if ((mid - l) >= THRESHOLD) Av"R[)
mergeSort(data, temp, l, mid); "$N#p5
else ;u;#g
insertSort(data, l, mid - l + 1); qR(\5}
if ((r - mid) > THRESHOLD) (IC]?n}
mergeSort(data, temp, mid + 1, r); <<(wa j
else "SzdDY6
insertSort(data, mid + 1, r - mid); 8S%52W|
MZlk0o2
for (i = l; i <= mid; i++) { 9/hrjItV
temp = data; .C&ktU4
} SF&BbjBE0
for (j = 1; j <= r - mid; j++) { *"D3E7AO
temp[r - j + 1] = data[j + mid]; 5"HVBfFk
} ?*E'^~,H)
int a = temp[l]; t"k*PA
int b = temp[r]; ?mWw@6G,
for (i = l, j = r, k = l; k <= r; k++) { q8^^H$<Db
if (a < b) { %F!1
data[k] = temp[i++]; K@#(*."
a = temp; F_;vO%}
} else { %%NlTE8*
data[k] = temp[j--]; -sw .
b = temp[j]; \<y`!"c
} Fe]B&n
} x*?x=^I{
} Rn{iaM2Y<
: y5<go8e
/** kBYNf =
* @param data Hj:r[/
* @param l oN{Z+T :
* @param i O) WCW<p
*/ XLAN Np%E
private void insertSort(int[] data, int start, int len) { I3,= 0z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @r#v[I
} .Jt[(;
} $/.zm;D
} lD"(MQV@0
} uM_#
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堆排序： P5 K' p5}#
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package org.rut.util.algorithm.support; | \'rP_I>
W6"v)Jc>_
import org.rut.util.algorithm.SortUtil; 3 |hHR
qxFB%KqU
/** eU<]o< \Qo
* @author treeroot O+?<h{"
* @since 2006-2-2 GFel(cx:K
* @version 1.0 ag*mG*Z
*/ :cq9f2)
public class HeapSort implements SortUtil.Sort{ 0TGLM#{
>S'17D
/* (non-Javadoc) qW!]co
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qQ"Fv|]~>
*/ 1_\;- !t
public void sort(int[] data) { !1q 9+e
MaxHeap h=new MaxHeap(); E}sO[wNPf
h.init(data); q)Fq i
for(int i=0;i h.remove(); ?pn}s]*/
System.arraycopy(h.queue,1,data,0,data.length); Md0sK
} EmODBTu+
hjIT_{mk
private static class MaxHeap{ i?fOK_d
G8r``{C!
void init(int[] data){ $)RNKMZC}A
this.queue=new int[data.length+1]; yto,>Utzg
for(int i=0;i queue[++size]=data; -C<zF`jO
fixUp(size); (*oL+ef-C
} =0G!f$7^i
} _~*,m#uxJ
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private int size=0; Dh5X/y
H63,bNS s
private int[] queue; _T2=J+"-Kp
Td G!&:>
public int get() { /c2w/+ _
return queue[1]; d4nH_?
} EI:w aIr
D3)zk@N
public void remove() { );Z1a&K5k
SortUtil.swap(queue,1,size--); 9A,^c;
fixDown(1); Gi "941zVl
} <L`"!~Q
file://fixdown 7.Z@Wr?
private void fixDown(int k) { B<~ NS)w
int j; (;q\}u
while ((j = k << 1) <= size) { cG?cUw).E
if (j < size %26amp;%26amp; queue[j] j++; n84GZ5O>7
if (queue[k]>queue[j]) file://不用交换 |fSe>uVZ
break; U7I qST
SortUtil.swap(queue,j,k); Kt"BE j
k = j; k'#(1(xj
} ;gs ^%z
} 6S+U&Ce\
private void fixUp(int k) { ]p;FZ4-T
while (k > 1) { tkXEHsRT
int j = k >> 1; ;$a@J&
if (queue[j]>queue[k]) '1$!jmY
break; q*2N{
SortUtil.swap(queue,j,k); RTv qls
k = j; lWqrU1Sjl
} # g_Bx
} #/I[Jqf
]|sAK%/
} nv0]05.4
t`+'r}=d
} vP!{",>
K^B%/T]d
SortUtil： 4"xPr[=iG
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package org.rut.util.algorithm; D<V~f B
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import org.rut.util.algorithm.support.BubbleSort; qQ0cJIISb\
import org.rut.util.algorithm.support.HeapSort; \mV'mZ9>
import org.rut.util.algorithm.support.ImprovedMergeSort; 4E+hRKuo,
import org.rut.util.algorithm.support.ImprovedQuickSort; Op>%?W8/UF
import org.rut.util.algorithm.support.InsertSort; *P#WDXRwd
import org.rut.util.algorithm.support.MergeSort; ?}m']4p
import org.rut.util.algorithm.support.QuickSort; Q4*fc^?u
import org.rut.util.algorithm.support.SelectionSort; !}4MN:r
import org.rut.util.algorithm.support.ShellSort; ,:`ND28V7
JB>b`W9
/** A0fFv+RN3
* @author treeroot (sQr X{~
* @since 2006-2-2 I(9R~q
* @version 1.0 "h|'}7p
*/ {'AWZ(
public class SortUtil { ;q:jl~
public final static int INSERT = 1; ?gwUwOV"
public final static int BUBBLE = 2; !vk|<P1
public final static int SELECTION = 3; mWyqG*-Hb
public final static int SHELL = 4; #vzEu )Ul
public final static int QUICK = 5; <D::9c j
public final static int IMPROVED_QUICK = 6; H_0/f8GwnG
public final static int MERGE = 7; *FmTy|
public final static int IMPROVED_MERGE = 8; 8X I?
public final static int HEAP = 9; P(;?kg}0
VwEb7v,^0\
public static void sort(int[] data) { -CRraEXf8
sort(data, IMPROVED_QUICK); ,9P:Draxs`
} ixV0|P8,c
private static String[] name={ r YF #^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }=|!:kiE
}; OQ,NOiNkap
?_v{| YI=
private static Sort[] impl=new Sort[]{ V13BB44
new InsertSort(), **+e7k
new BubbleSort(), BbRBT@
new SelectionSort(), '(dz"PL.
new ShellSort(), a&k_=/X&
new QuickSort(), lt_']QqU
new ImprovedQuickSort(), Q7g>4GZC
new MergeSort(), V~ TWKuR
new ImprovedMergeSort(), TO-nD>
new HeapSort() ,:%"-`a%
}; 5l,ZoB8
Fh*j#*oe
public static String toString(int algorithm){ wQ%mN[
return name[algorithm-1]; Uz7^1.-g4
} 0v]?6wX
l$YC/bP
public static void sort(int[] data, int algorithm) { VL[kJi
impl[algorithm-1].sort(data); >/#KI~}'N
} _ib"b#
#BQ.R,
public static interface Sort { $z$u{
public void sort(int[] data); 7c;9$j
} jr)7kP@
Ed:eGm }
public static void swap(int[] data, int i, int j) { P1zdK0TM
int temp = data; ?\#N9+{W
data = data[j]; <BW[1h1k5_
data[j] = temp; ncSFj.}w]
} u-1;'a
} ^{\<N()R