[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; e{6wFN
} _d!sSyk`
int i1=l; 5?3v;B6
int i2=mid+1; E2Sj IR}
for(int cur=l;cur<=r;cur++){ [w](x
if(i1==mid+1) 2<7pe@c98
data[cur]=temp[i2++]; W{Qb*{9
else if(i2>r) {UH45#Ua
data[cur]=temp[i1++]; THl:>s
else if(temp[i1] data[cur]=temp[i1++]; fD%/]`y
else J5b3r1~D"[
data[cur]=temp[i2++]; TT/=0^"
} =u0=)\0@r
} ZW M:Wj192
5ncW s)
} 1uo |a
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改进后的归并排序: iBWzxPv:z
LBio$67F
package org.rut.util.algorithm.support; nANl9;G
4=MVn
import org.rut.util.algorithm.SortUtil; '4{@F~fu
~vP_c(8f
/** f*@ :,4@
* @author treeroot qX&+
* @since 2006-2-2 .0nT*LF
* @version 1.0 `LH9@Z{
*/ t:dvgRJt*
public class ImprovedMergeSort implements SortUtil.Sort { BTsvL>Wy
xb7!!PR
private static final int THRESHOLD = 10; 8V(~u^!%_
M5[#YG'FlQ
/* "eoPG#]&
* (non-Javadoc) 0MT?}D&TL
* ,%Pn.E* r;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *7*_QW%?A
*/ s"7FmJ\7rw
public void sort(int[] data) { *K>2B99TXu
int[] temp=new int[data.length]; 2U%t
mergeSort(data,temp,0,data.length-1); D~qi6@Ga
} nUY)LnI
]Vfp,"op
private void mergeSort(int[] data, int[] temp, int l, int r) { C&F% j.<
int i, j, k; 6n:X p_yO
int mid = (l + r) / 2; ~m R^j
if (l == r) uP7|#>1%
return; +VIEDV+
if ((mid - l) >= THRESHOLD) [p\xk{7Y
mergeSort(data, temp, l, mid); DvN_}h^nX
else &2@"zD
insertSort(data, l, mid - l + 1); zt((TD2
if ((r - mid) > THRESHOLD) 0?R$>=u
mergeSort(data, temp, mid + 1, r); /3+E-|4s
else HH*,Oe
insertSort(data, mid + 1, r - mid); b`wT*&
W9Us I
for (i = l; i <= mid; i++) { XW'7
temp = data; :A#'8xE/
} 6o#J
for (j = 1; j <= r - mid; j++) { $sL+k 'dY
temp[r - j + 1] = data[j + mid]; 3b?-83a
} >$<Q:o}^
int a = temp[l]; r?`nc6$0|
int b = temp[r]; -Hi_g@i*XW
for (i = l, j = r, k = l; k <= r; k++) { +=`w
if (a < b) { {3Gj rE
data[k] = temp[i++]; GNG.N)q#C
a = temp; : Q,O:
} else { Z(E.F,k
data[k] = temp[j--]; yl<=_Q
b = temp[j]; 9<Zm}PE32
} z:n JN%Qb
} R]kH$0`
} q9(O=7O]-
E?0RR'
/** Nf~B 1vkp
* @param data ?#5)TAW
* @param l ~9fTs4U
* @param i Z,3CMWHg
*/ G*v,-O
private void insertSort(int[] data, int start, int len) { hHt.No
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;r;>4+zn\
} I tn?''~;
} ]~WIGl"g
} LQ$dT#z2A
} aBF<it>
OOsd*nX/
堆排序： 3e[k9`
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package org.rut.util.algorithm.support; /Wjf"dG}
< Lrd(b;
import org.rut.util.algorithm.SortUtil; wS2N,X/Y
u<@ 55k
/** V6<Ki
* @author treeroot F fzY3r+
* @since 2006-2-2 wRWKem=
* @version 1.0 |?fc]dl1]
*/ ~fA H6FdZ\
public class HeapSort implements SortUtil.Sort{ zHj_q%A
@iz6)2z
/* (non-Javadoc) =2wy;@f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x(zW<J5X"
*/ 3'Z+PPd!
public void sort(int[] data) { 3~0Xe
MaxHeap h=new MaxHeap(); Bsz;GnD|r
h.init(data); a'@?c_y;$
for(int i=0;i h.remove(); MU_ >+Wnf
System.arraycopy(h.queue,1,data,0,data.length); b~G|Bhxa
} BgG+
HQ|{!P\/?U
private static class MaxHeap{ LZ9IE>sj
!91<K{#A{
void init(int[] data){ ]_)=xF19
this.queue=new int[data.length+1]; HPWjNwM
for(int i=0;i queue[++size]=data; PJcz] <
fixUp(size); l\-(li H
} YwM;G g3
} E?f*Z{~,
M7lMOG(\
private int size=0; j[1^#kE
u`X}AKC
private int[] queue; U#_rcu
t#J #DyY5
public int get() { Yc'7F7.<6
return queue[1]; @*LESN>T@t
} b+}*@xhl
?9H.JR2s%
public void remove() { ~Urj:l
SortUtil.swap(queue,1,size--); yYTiAvN
fixDown(1); ">RDa<H]
} <$;fOp
file://fixdown 8>jd2'v{
private void fixDown(int k) { ? Kn~fs8
int j; k}Vu!+cz
while ((j = k << 1) <= size) { hMs}r,*
if (j < size %26amp;%26amp; queue[j] j++; l:kF0tj"
if (queue[k]>queue[j]) file://不用交换 pRdO4?l
break; &"svt2
SortUtil.swap(queue,j,k); h:+>=~\
k = j; ZjJEjw
} T+/Gz'
} 2\!.w^7'^T
private void fixUp(int k) { xH8nn3U
while (k > 1) { PFIL)D |G
int j = k >> 1; T%F8=kb-9
if (queue[j]>queue[k]) 5G=CvGu
break; QSy#k~
SortUtil.swap(queue,j,k); ffyKAZ{]po
k = j; Xl%&hM
} VuW&CnZ
} ',* 6vbII
hpym!G
} MhB kr{8
p.1|bXY`
} M+^+u 1QQ0
7QRtNYo#\
SortUtil： {ByT,92
VL<)d-
package org.rut.util.algorithm; |v{a5|<E
r,b-c
import org.rut.util.algorithm.support.BubbleSort; (#.)~poZ
import org.rut.util.algorithm.support.HeapSort; /$x6//0If
import org.rut.util.algorithm.support.ImprovedMergeSort; T[eTT]Z{Ia
import org.rut.util.algorithm.support.ImprovedQuickSort; z|yC[Ota
import org.rut.util.algorithm.support.InsertSort; AuU:613]W8
import org.rut.util.algorithm.support.MergeSort; Tr}c]IP*
import org.rut.util.algorithm.support.QuickSort; an<tupi[E
import org.rut.util.algorithm.support.SelectionSort; ;xa]ke3]
import org.rut.util.algorithm.support.ShellSort; _B|g)Rdv
#,qikKjt2
/** HWGlC <
* @author treeroot ?z60b=f8
* @since 2006-2-2 ^IM;D)X&:
* @version 1.0 I#f<YbzD
*/ \Jv6Igu
public class SortUtil { PHD$E s
public final static int INSERT = 1; s4}}MV3X
public final static int BUBBLE = 2; I)O-i_}L&K
public final static int SELECTION = 3; cEw/F0
public final static int SHELL = 4; Ph.$]yQCc]
public final static int QUICK = 5; /^0Hi4+\
public final static int IMPROVED_QUICK = 6; J]|-.Wv1
public final static int MERGE = 7; 5R,/X
public final static int IMPROVED_MERGE = 8; 37!}8
public final static int HEAP = 9; n|L.dBAs]
Md_\9G .e
public static void sort(int[] data) { ^QV;[ha,o
sort(data, IMPROVED_QUICK); A0WQZt!FEN
} &ze'V , :
private static String[] name={ d|6*1hby
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $- #M~eZv
}; "$:nz}
^ tm,gh
private static Sort[] impl=new Sort[]{ e v?Hz8Q;(
new InsertSort(), ({zp$P}
new BubbleSort(), ;nv4lxm
new SelectionSort(), z/rN+ ,
new ShellSort(), #!y|cP~;I
new QuickSort(), P67r+P,
new ImprovedQuickSort(), sbNCviKP
new MergeSort(), T0RgCU IV
new ImprovedMergeSort(), +|( eP_
new HeapSort() x_(B7ob
}; NCSb`SC:
9}2I'7]
public static String toString(int algorithm){ .6OE8w 1
return name[algorithm-1]; o~^hsm[44J
} D@4hQC\
A"z')
public static void sort(int[] data, int algorithm) { 1/w['d4l!
impl[algorithm-1].sort(data); ]b<k%
} 7,jh44(\=
94|BSxc
public static interface Sort { n&[U/`o
public void sort(int[] data); -_pI:K[
} m2<sVTN`^
)X| uOg&|
public static void swap(int[] data, int i, int j) { jB?Tua$,s
int temp = data; 2J|Yc^b6
data = data[j]; uu=e~K
data[j] = temp; GXRK+RHuBi
} =`vUWONn
} O2Rv^la