[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; $m)gfI]9
} [.^ol6
int i1=l; &9^4-5]
int i2=mid+1; +WAkBE/
for(int cur=l;cur<=r;cur++){ @"`}%-b
if(i1==mid+1) c+&Kq.~K
data[cur]=temp[i2++]; ?$K-f:?c
else if(i2>r) V]; i$
data[cur]=temp[i1++]; }2@Z{5sh)
else if(temp[i1] data[cur]=temp[i1++]; |,@D<
else v@|<.
data[cur]=temp[i2++]; ~h_ _Y>
} u.|%@
} \wD/TLS}
CV\^gTPmx
} EYn?YiVFU
w$/lq~zU
改进后的归并排序: h$kz3r;b,"
r&m49N,d
package org.rut.util.algorithm.support; I]`RvT
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import org.rut.util.algorithm.SortUtil; :P}3cl_
:Rb\Ca
/** 4/|x^Ky>G
* @author treeroot kBhjqI*
* @since 2006-2-2 zwZvKV/g
* @version 1.0 Fy"M 4;7
*/ },j |eA/W
public class ImprovedMergeSort implements SortUtil.Sort { 9c[X[Qc
W,NqevXo:
private static final int THRESHOLD = 10; `X5!s
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/* ttUK~%wSx
* (non-Javadoc) t*9 gusmG
* WI4<2u;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O_8 SlW0e
*/ m{Vd3{H40
public void sort(int[] data) { 7H)$NG<U$
int[] temp=new int[data.length]; ,eBC]4)B6
mergeSort(data,temp,0,data.length-1); pe vXixl
} {o5|(^l
q@~g.AMCB
private void mergeSort(int[] data, int[] temp, int l, int r) { TL2E|@k1]
int i, j, k; R1X'}#mU
int mid = (l + r) / 2; D#L(ZlD4
if (l == r) q4[8\Ua
return; {6H[[7i
if ((mid - l) >= THRESHOLD) }lIc{R@H
mergeSort(data, temp, l, mid); =}#yi<Lt
else JY2<ECO
insertSort(data, l, mid - l + 1); `jGeS[FhR
if ((r - mid) > THRESHOLD) m;~}}~&vQ
mergeSort(data, temp, mid + 1, r); a5pl/d
else vSR&>Q%X
insertSort(data, mid + 1, r - mid); n#g_)\
A:< %>
for (i = l; i <= mid; i++) { llP V{
temp = data; u:f ]|Q
} ,fp+nu8,
for (j = 1; j <= r - mid; j++) { UqI #F
temp[r - j + 1] = data[j + mid]; 7S}0Kuk)
} iT :3e%
int a = temp[l]; Z?{\34lPj
int b = temp[r]; 6ieul@?*u*
for (i = l, j = r, k = l; k <= r; k++) { \1!Q.V
if (a < b) { %`C*8fc&
data[k] = temp[i++]; _ l|%~
a = temp; d}4NL:=&
} else { 9!jPZn
data[k] = temp[j--]; t`z"=S
b = temp[j]; j**[[
} vHf)gi}O|
} kw$7G1Q
} ~{I.qv)>M~
d <}'eBT'
/** kM506U<g
* @param data P:'wSE91
* @param l D!~ Y"4<
* @param i btuG%D{a^
*/ Bib<ySCre
private void insertSort(int[] data, int start, int len) { :EV.nD7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $XhMI;h
} DzGUKJh6
} "@&TC"YG0
} <2U@O` gC
} ?gMx
`f>!/Zm%9
堆排序： Q-w# !<L.
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package org.rut.util.algorithm.support; ^xa, r#N:V
O6hzOyNX@
import org.rut.util.algorithm.SortUtil; /xk7Z q
U*[E+Uq}:N
/** l1 Kv`v\
* @author treeroot 0SL{J*S4[#
* @since 2006-2-2 v8ap"9b
* @version 1.0 lD,2])>
*/ J 6KHc^,7
public class HeapSort implements SortUtil.Sort{ "Au4&Fu
KrpIH6
/* (non-Javadoc) *&I>3;~%^}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /A7( `l;6
*/ r!Aj5
public void sort(int[] data) { ~</FF'Xz
MaxHeap h=new MaxHeap(); LDjtkD.r
h.init(data); zl1*GVg
for(int i=0;i h.remove(); Xfc$M(a K{
System.arraycopy(h.queue,1,data,0,data.length); r"dIB@
} ]W5*R07
M1kA-Xr
private static class MaxHeap{ {]Zan'{PCO
5.6tVr
void init(int[] data){ l ;:IL\*1I
this.queue=new int[data.length+1]; }Z"iW/?"
for(int i=0;i queue[++size]=data; 0VNLhM(LM
fixUp(size); >s^$-
} [7@g*!+d
} )aIcA
OBAO(Ke
private int size=0; %4*c/ c6
J9mK9{#q
private int[] queue; <T_3s\
bTD?uX!^@
public int get() { sC-o'13
return queue[1]; ^#:;6^Su
} 6j6CA?|
}:#WjH^
public void remove() { AY/.vyS
SortUtil.swap(queue,1,size--); NpH8=H9
fixDown(1); 0zr27ko
} L"bJ#0m
file://fixdown |owr?tC
private void fixDown(int k) { a4,V(Hlm
int j; i|^Q{3?o#
while ((j = k << 1) <= size) { .C^P6S2oJ
if (j < size %26amp;%26amp; queue[j] j++; huC{SzXM
if (queue[k]>queue[j]) file://不用交换 +Ryj82;59z
break; G WIsT\J
SortUtil.swap(queue,j,k); K}l3t2uk
k = j; /whaY4__O\
} ,{0Y:/T'
} yzS^8,
private void fixUp(int k) { =d{6=2Pt
while (k > 1) { ^@^8iZ
int j = k >> 1; ;\RVC7
if (queue[j]>queue[k]) c[Fc3
break; _KH91$iW8m
SortUtil.swap(queue,j,k); P~\rP6 ;
k = j; MRLiiIrq,5
} B"GC|}N)v
} ;"MChk
D^[l~K
} z0}j7ns]
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} f]NLR>$L}
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SortUtil： ]\M{Abqd{
VIp|U{
package org.rut.util.algorithm; 9mi@PW}1
=2p?_.|'
import org.rut.util.algorithm.support.BubbleSort; (kxS0 ]=
import org.rut.util.algorithm.support.HeapSort; Z@Rm^g]o
import org.rut.util.algorithm.support.ImprovedMergeSort; .RxTz9(
import org.rut.util.algorithm.support.ImprovedQuickSort; ,t`V^(PEq
import org.rut.util.algorithm.support.InsertSort; JqzoF}WH
import org.rut.util.algorithm.support.MergeSort; rRe5Q
import org.rut.util.algorithm.support.QuickSort; f-F=!^.
import org.rut.util.algorithm.support.SelectionSort; \}b2oiY
import org.rut.util.algorithm.support.ShellSort; =z# trQ{
9+1{a.JO
/** u nv:sV#b
* @author treeroot JG!B3^qB
* @since 2006-2-2 >+%#m'Y&&
* @version 1.0 ~wa4kS<>
*/ ,j%\3g`
public class SortUtil { [PIMG2"G
public final static int INSERT = 1; i<ES/U\
public final static int BUBBLE = 2; V(&L
public final static int SELECTION = 3; *u$aItx
public final static int SHELL = 4; ?IGp?R^j"
public final static int QUICK = 5; 2|,$#V=
public final static int IMPROVED_QUICK = 6; nd'D0<%
public final static int MERGE = 7; iV{_?f1jo
public final static int IMPROVED_MERGE = 8; .V;,6Vq
public final static int HEAP = 9; 45JL{YRN
*Dg@fxCQ
public static void sort(int[] data) { ;?Pz0,{h
sort(data, IMPROVED_QUICK); 1n`[D&?q
} ? $B4'wc5
private static String[] name={ iWt%Boyi
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 85E$m'0O
}; vU>^
{vD$odi
private static Sort[] impl=new Sort[]{ }_lG2#Ll5
new InsertSort(), L0![SE>
new BubbleSort(), [Hx}#Kds
new SelectionSort(), \m7\}Nbz0/
new ShellSort(), Wet0qt]
new QuickSort(), )?jFz'<r
new ImprovedQuickSort(), Q6(~VvC-
new MergeSort(), Y(,RJ&7
new ImprovedMergeSort(), M ygCg(h
new HeapSort() P@O_MT
}; =i)%AnZ^9
MXSD8]je
public static String toString(int algorithm){ g(&cq
return name[algorithm-1]; 'dj3y/ k%
} 4u5j 7`O
6/;YS[jX
public static void sort(int[] data, int algorithm) { +C`!4v\n
impl[algorithm-1].sort(data); 1EV bGe%b
} m'2F#{
Ft>B% -;
public static interface Sort { v6)QLp
public void sort(int[] data); xsZN@hT
} ?w/p9j#
:cA P{rSe
public static void swap(int[] data, int i, int j) { 1:eWZ]B5"
int temp = data; =o(}=T>:"
data = data[j]; [],[LkS
data[j] = temp; EeYL~ORdi
} Ny"9!3V
} l4RqQ+[KA;