[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; }>>lgW>n,;
} P'xq+Q
int i1=l; ojni+}>_
int i2=mid+1; 9;NR
for(int cur=l;cur<=r;cur++){ *^ g7kCe(
if(i1==mid+1) T]Pp\6ff
data[cur]=temp[i2++]; ORD@+ {
else if(i2>r) 5v<BB`XWp
data[cur]=temp[i1++]; _0<qS{RW
else if(temp[i1] data[cur]=temp[i1++]; XOAZ
else .A//Q|ot!
data[cur]=temp[i2++]; <:fjWy
} dnSjXyjFB
} Ni7~ Mjjt
"WV]| TS"]
} q4C$-W%rj
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改进后的归并排序: sFqZ@t}~
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package org.rut.util.algorithm.support; % V/J6
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import org.rut.util.algorithm.SortUtil; P33x/#VVE
u(S~V+<@Z
/** v `9IS+Z
* @author treeroot Zu951+&`
* @since 2006-2-2 "JzQCY^C
* @version 1.0 ?kMG!stgp}
*/ iqW T<WY
public class ImprovedMergeSort implements SortUtil.Sort { l:5x*QSX
*"2TT})
private static final int THRESHOLD = 10; l_Mi'}j
.gh3"
/* L}7c{6!F7
* (non-Javadoc) N&n2\Y
* /~Zxx}<;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hosw :%
*/ ,#@B3~giC
public void sort(int[] data) { : z*OAl"
int[] temp=new int[data.length]; t>:2F,0K9
mergeSort(data,temp,0,data.length-1); c4E=qgP
} cD{I*t$
a*@ 6G
private void mergeSort(int[] data, int[] temp, int l, int r) { f^z/s6I0
int i, j, k; S4508l
int mid = (l + r) / 2; _1S^A0ft
if (l == r) t`1E4$Bb\
return; C%}}~Y
if ((mid - l) >= THRESHOLD) gh>'O/9
mergeSort(data, temp, l, mid); )>abB?RZ
else :yO.Te F
insertSort(data, l, mid - l + 1); u^&2T(xGi
if ((r - mid) > THRESHOLD) P]hS0,sE<(
mergeSort(data, temp, mid + 1, r); h)2W}p{a4=
else }c?/-ab>
insertSort(data, mid + 1, r - mid); #&a-m,Y$sx
9&a&O Z{
for (i = l; i <= mid; i++) { {fW(e?8)
temp = data; /X>Fn9mM
} Pi7vuOJr8
for (j = 1; j <= r - mid; j++) { pVbgjJI
temp[r - j + 1] = data[j + mid]; W=fs"<
} G41 gil6k
int a = temp[l]; [9| 8p$
int b = temp[r]; {eo4J&as
for (i = l, j = r, k = l; k <= r; k++) { N'[bA
if (a < b) { jp?;8rS3
data[k] = temp[i++]; *<Yn
a = temp; /<,LM8n
} else { @LZ'Qc }@
data[k] = temp[j--]; OCIWQ/ P
b = temp[j]; Vf<VKP[9K
} QwPLy O
} .4DX/~F
} (:v|(Gn/
Qvo(2(
/** O&h3=?O&B
* @param data "e4;xU-
* @param l p(dJf&D
* @param i *;b.x"
*/ z9OhY]PPF
private void insertSort(int[] data, int start, int len) { g#b[-)Qx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r:Uqtqxh
} /;>U0~K
} K8xwPoRL
} G&8)5d[
} KZ_d..l*W
,Yx"3i,
堆排序： L7oLV?k
jzCSxuZ7O
package org.rut.util.algorithm.support; 2 |lm'Hf
U,Py+c6
import org.rut.util.algorithm.SortUtil; Teq1VK3Hr
CFdR4vuEI
/** a![x^@nF
* @author treeroot *9V;;bY#
* @since 2006-2-2 ~gU.z6us
* @version 1.0 >b9nc\~
*/ ]*b}^PQM^
public class HeapSort implements SortUtil.Sort{ )Lt|]|1B{
)\fAy
/* (non-Javadoc) Zqwxi1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #lDf8G|ST~
*/ "o"ujQ(v
public void sort(int[] data) { \z'A6@
MaxHeap h=new MaxHeap(); []B9Me
h.init(data); 1HOYp*{#wP
for(int i=0;i h.remove(); R1$O)A}k
System.arraycopy(h.queue,1,data,0,data.length); ;e~Z:;AR
} i=67
7g@P$e]
private static class MaxHeap{ 2p'ujAK
*a}NRf}W
void init(int[] data){ pZ4]KxX@
this.queue=new int[data.length+1]; ' *hy!f]
for(int i=0;i queue[++size]=data; LvP{"K;
fixUp(size); |KSd@
} Fh t$7V
} 2(SK}<X
MR8\'0]
private int size=0; z@@w?>*
Lbb{z
private int[] queue; K5X,J/n
O7r<6(q(
public int get() { 9[.vtk\iyH
return queue[1]; a3}#lY):
} GMc{g
|.kYomJ
public void remove() { Hj&mwn]
SortUtil.swap(queue,1,size--); pPr/r&r
fixDown(1); rHhn)m
} ] Tc!=SV
file://fixdown H"v3?g`S%
private void fixDown(int k) { oq00)I1
int j; \;w$"@9
while ((j = k << 1) <= size) { ^H]q[XFR
if (j < size %26amp;%26amp; queue[j] j++; )C>4?)
if (queue[k]>queue[j]) file://不用交换 r8PXdNg
break; ;uw`6 KJ
SortUtil.swap(queue,j,k); wk @-O}W
k = j; ~~J xw ]
} &+t! LM
} w.s-T.5.j
private void fixUp(int k) { ~pM\]OC
while (k > 1) { _"BYnPq@wb
int j = k >> 1; {O\>"2}m'f
if (queue[j]>queue[k]) ?,Z[)5 ZN
break; xDRNtLj<u
SortUtil.swap(queue,j,k); ;Y:_}kN8_
k = j; c,WRgXL
} P}=u8(u
} ]7H ?
&S\q*H=}i
} @WcK<Qho
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} {\tHS+]
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SortUtil： OGmOk>_
:4o08M%
package org.rut.util.algorithm; i={ :6K?^
q:OSQ~U_
import org.rut.util.algorithm.support.BubbleSort; h@nNm30i
import org.rut.util.algorithm.support.HeapSort; w h4WII
import org.rut.util.algorithm.support.ImprovedMergeSort; $L|YllD%
import org.rut.util.algorithm.support.ImprovedQuickSort; $i# 1<Qj
import org.rut.util.algorithm.support.InsertSort; | CNsa
import org.rut.util.algorithm.support.MergeSort; k+*DPo@)
import org.rut.util.algorithm.support.QuickSort; V*an0@
import org.rut.util.algorithm.support.SelectionSort; SSi-Z
import org.rut.util.algorithm.support.ShellSort; ~(%TQY5
'G3;!xk$
/** :\ %.x3T'
* @author treeroot 6U{&`8C
* @since 2006-2-2 IfyyA
* @version 1.0 <@;Y.76~
*/ M>Yge~3
public class SortUtil { 1$cX`D`
public final static int INSERT = 1; [8Zq 1tU;G
public final static int BUBBLE = 2; RI,Z&kXj2o
public final static int SELECTION = 3; V{51wnxT
public final static int SHELL = 4; lZpa)1.tiC
public final static int QUICK = 5; jY.iQBhjEB
public final static int IMPROVED_QUICK = 6; 7|~j=,HU+Z
public final static int MERGE = 7; x --buO
public final static int IMPROVED_MERGE = 8; Q~/TqG U
public final static int HEAP = 9; P\"|b\O1
Kv**(~FNnH
public static void sort(int[] data) { WU}?8\?U%
sort(data, IMPROVED_QUICK); 3$YgGum
} caA>; +aBH
private static String[] name={ tx-HY<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SoS GQ&k
}; vo'=d"zm
o)NQE?
private static Sort[] impl=new Sort[]{ =M]f7lJ
new InsertSort(), D@[Mk"f
new BubbleSort(), _O!)aD
new SelectionSort(), xRZ9.Agv_
new ShellSort(), :5/P{Co(
new QuickSort(), k!/"J ;
new ImprovedQuickSort(), zP\n<L5
new MergeSort(), idL6*%M
new ImprovedMergeSort(), ~b}@*fq
new HeapSort() 8FY.u{93
}; c*+yJNm3>
&_Py{Cv@Dw
public static String toString(int algorithm){ aL63=y
return name[algorithm-1]; MMs#Y1dH
} 3q*y~5&I
Z<@Kkbj
public static void sort(int[] data, int algorithm) { <|= UrG
impl[algorithm-1].sort(data); R#ayN*
} 3?Ckk{)&
d8 1u
public static interface Sort { Aj`zT'
public void sort(int[] data); kj(Ko{
} ,3^gB,ka
0>#or$:6E
public static void swap(int[] data, int i, int j) { ;g[C=yhK`C
int temp = data; ?A|8J5EV
data = data[j]; rDNz<{evj
data[j] = temp; A?{ X5`y
} _*b1]<
} y(M-