[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; YX#-nyK
} I"`M@ %
int i1=l; 9VbOQ{8
int i2=mid+1; /Ju;MeE9
for(int cur=l;cur<=r;cur++){ zLJ/5&
if(i1==mid+1) 1m.W<
data[cur]=temp[i2++]; 3g6j?yYqb
else if(i2>r) ()H:UvM=t
data[cur]=temp[i1++]; Km^&<3ch#
else if(temp[i1] data[cur]=temp[i1++]; *2GEnAZb7n
else J4\qEO
data[cur]=temp[i2++]; h5K$mA5
} CoA6
} Y5j]Z^^v
xL" |)A =
} I&YSQK:b
:GJ &_YHf
改进后的归并排序: F,'exuZ
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package org.rut.util.algorithm.support; -! K-Htb-
uAWM\?
import org.rut.util.algorithm.SortUtil; =xS+5(
LupkrxV
/** )[Yv?>ib
* @author treeroot 2rZxSg
* @since 2006-2-2 ,tg0L$qC
* @version 1.0 {+@bZ}57
*/ ~_!F01s
public class ImprovedMergeSort implements SortUtil.Sort { L/z),#
+U3m#Y)k
private static final int THRESHOLD = 10; .e3+s*
S1?-I_t+]
/* 2J;kSh1,L
* (non-Javadoc) M^]cM(swK5
* x_dy~(*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Nj 00W1
*/ (V HL{rj
public void sort(int[] data) { y(xJTj
int[] temp=new int[data.length]; jfqopiSi
mergeSort(data,temp,0,data.length-1); ~appY Av
} /QJ?bD#a
z+>}RT]
private void mergeSort(int[] data, int[] temp, int l, int r) { WH\))y-
int i, j, k; VzKW:St
int mid = (l + r) / 2; 10U9ZC
if (l == r) Qg<(u?7N
return; .?hP7;hhI
if ((mid - l) >= THRESHOLD) 1&U>,;]*
mergeSort(data, temp, l, mid); $-*!pRaVU
else "%x<ttLl
insertSort(data, l, mid - l + 1); @#-q^}3
if ((r - mid) > THRESHOLD) <(-hx+^
mergeSort(data, temp, mid + 1, r); /n8B,-Z5s5
else '3 ^+{=q
insertSort(data, mid + 1, r - mid); yiA<,!;4P
_:"<[ >9
for (i = l; i <= mid; i++) { ,xxR\}
temp = data; 9\DQ>V TQ
} `9b7>Nn<
for (j = 1; j <= r - mid; j++) { fP `b>]N_
temp[r - j + 1] = data[j + mid]; 1N>|yQz
} +o51x'Ld*
int a = temp[l]; IyLx0[:U
int b = temp[r]; @$+ecaVW
for (i = l, j = r, k = l; k <= r; k++) { qhz]Wm P
if (a < b) { QD>"]ap,o
data[k] = temp[i++]; >:|q&|x-
a = temp; <|Pun8j
} else { ez6EjUk
data[k] = temp[j--]; r'*}TM'8
b = temp[j]; 1[vi.
} oTuOw|[
} .?Gd'Lp
} jav#f{'
1wP-
/** #"5 Dk#@
* @param data 5EebPXBzB
* @param l $+I;oHWI
* @param i ^~A>8CQOU
*/ bG(3^"dS
private void insertSort(int[] data, int start, int len) { AlIpsJ[UU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <N9[?g)
} 5x>}O3Q_
} gE?|_x#
} ?n ZY)
} BFOq8}fX2
jE/AA!DC#
堆排序： }-sdov<<
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package org.rut.util.algorithm.support; jWE:ek*
& J2M1z%
import org.rut.util.algorithm.SortUtil; cu/5$m?xx
SK#(#OQoh
/** *9{Z$IA9w
* @author treeroot 7F{3*`/6
* @since 2006-2-2 '5|h)Q5
* @version 1.0 |]X
*/ k<\$OoOZ
public class HeapSort implements SortUtil.Sort{ la+[bm<v
SrK)t.oK
/* (non-Javadoc) 8{X"h#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3^6 d]f
*/ ikSt"}/hd
public void sort(int[] data) { SV~~Q_U9
MaxHeap h=new MaxHeap(); PJL=$gBgKk
h.init(data); Rw:*'1
for(int i=0;i h.remove(); HEM9E&rL
System.arraycopy(h.queue,1,data,0,data.length); }=]M2}
} 3S}Pm2D2
uvG]1m#
private static class MaxHeap{ F ;2w1S^
L=sYLC6d
void init(int[] data){ ~"kb7Fxp
this.queue=new int[data.length+1]; 7*Ej. HK
for(int i=0;i queue[++size]=data; N#a$t&
fixUp(size); D5*q7A6
} LBa[:j2
} 3 C<L
uW}s)j.
private int size=0; !*%WuyCgr4
ZP\-T*)l$
private int[] queue; /VN f{p
-K3^BZHI
public int get() { ^>hWy D
return queue[1]; lUvpszH=
} )j0TeE1R
In<n&ib
public void remove() { m~-K[+ya`D
SortUtil.swap(queue,1,size--); m1Mt#@,$
fixDown(1); &RnTzqv
} ZWKg9%y7
file://fixdown ]X ?7ZI^
private void fixDown(int k) { GfmI<{da
int j; ei[j1F
while ((j = k << 1) <= size) { /*X2c6<d
if (j < size %26amp;%26amp; queue[j] j++; zM(vr"U
if (queue[k]>queue[j]) file://不用交换 =aBctd:eX`
break; ne_TIwfw-
SortUtil.swap(queue,j,k); t~#zMUfac
k = j; yU-e3O7L
} sWc*5Rt
} \Yc'~2n
private void fixUp(int k) { 0,89H4
while (k > 1) { V#S9H!hm$
int j = k >> 1; \(^nSy&N
if (queue[j]>queue[k]) m;GbLncA
break; 8)10o,#L
SortUtil.swap(queue,j,k); rFj-kojg
k = j; vPTM
} |w<H!lGe!$
} 2;DuHO1
~^r29'3
} =06gj)8
UVd7 JGR
} U<_3^
J:V6
SortUtil： 5',8 ziJQ
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package org.rut.util.algorithm; 4;0lvDD
5n9B?T8C
import org.rut.util.algorithm.support.BubbleSort; ]);%wy{Ho
import org.rut.util.algorithm.support.HeapSort; Hn%xDJ'
import org.rut.util.algorithm.support.ImprovedMergeSort; (2^gVz=j
import org.rut.util.algorithm.support.ImprovedQuickSort; 2[O&NdP\Zk
import org.rut.util.algorithm.support.InsertSort; /2=#t-p+
import org.rut.util.algorithm.support.MergeSort; GycSwQ ,
import org.rut.util.algorithm.support.QuickSort; 3@M|m<_R$
import org.rut.util.algorithm.support.SelectionSort; { + Zd*)M[
import org.rut.util.algorithm.support.ShellSort; Pa V@aM~3
`\#B18eU
/** ZK@N5/H(
* @author treeroot j/f?"VEr
* @since 2006-2-2 [d1mLJAR
* @version 1.0 hPUYyjXPB
*/ "NXB$a!:
public class SortUtil { IDB+%xl#S
public final static int INSERT = 1; 2ZG5<"DQ"
public final static int BUBBLE = 2; [f1 (`<
public final static int SELECTION = 3; ;U.hxh;+
public final static int SHELL = 4; d(:8M
public final static int QUICK = 5; 4,CXJ2
public final static int IMPROVED_QUICK = 6; }dWq=)*
public final static int MERGE = 7; o7sT=x9
public final static int IMPROVED_MERGE = 8; ToXki,
public final static int HEAP = 9; MbZJ;,e?
N D(/uyI
public static void sort(int[] data) { di6QVRj1
sort(data, IMPROVED_QUICK); XBb~\p3y
} KLitg6&P
private static String[] name={ 8&?s#5zA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" i]6`LqlO
}; ->g*</
'%dfzK*Z
private static Sort[] impl=new Sort[]{ x,|hU@h
new InsertSort(), #><.oreXq
new BubbleSort(), V-Sd[
new SelectionSort(), &U5{Hm9Ynr
new ShellSort(), ^Eb.:}!D6
new QuickSort(), $o0iLFIX/
new ImprovedQuickSort(), J;{N72
new MergeSort(), Ay5i+)MD
new ImprovedMergeSort(), :y%/u%L
new HeapSort() *n 6s.$p)%
}; &eCa0s?mI
)4<__|52"1
public static String toString(int algorithm){ W&&;:Fr
return name[algorithm-1]; $Q96,rb}k;
} HkUWehVm
pgI^4h
public static void sort(int[] data, int algorithm) { q_g+Jf P-D
impl[algorithm-1].sort(data); )4gJd? 8R
} 6@{(;~r
VEqS;~[
public static interface Sort { }L+L"l&
public void sort(int[] data); A+"ia1p,}
} Sa?ksD2IaB
g*e
public static void swap(int[] data, int i, int j) { 7hlO#PYZ
int temp = data; Jq&uF*!
data = data[j]; i|w81p^o
data[j] = temp; (e!0]Io@
} J'SZ
} 4'g;TI^