[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; R=8!]Oi6
} YB)1dzU
int i1=l; %_A1WC
int i2=mid+1; nA+[[(6
for(int cur=l;cur<=r;cur++){ S: /ShT
if(i1==mid+1) l*%?C*
data[cur]=temp[i2++]; |=GRPvvi
else if(i2>r) pY-izML
data[cur]=temp[i1++]; 'v\!}6
else if(temp[i1] data[cur]=temp[i1++]; Sgr<z d'b
else &Vl,x/
data[cur]=temp[i2++]; y ?Q"-o (
} b6g,mzqu
} 6 *Q5.g
tF`>.=
} tT'd]
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改进后的归并排序: Wx:_F;
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package org.rut.util.algorithm.support; )5]z[sE
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import org.rut.util.algorithm.SortUtil; }eB\k,7L
i?|K+"=D
/** :B"'49Q`
* @author treeroot Cr(pN[,
* @since 2006-2-2 AV%Q5Mi}
* @version 1.0 !nykq}kPN\
*/ MRmz/ZmRM
public class ImprovedMergeSort implements SortUtil.Sort { 9:@os0^O
]kKf4SJZFU
private static final int THRESHOLD = 10; }H^#}
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/* TcRnjsY$
* (non-Javadoc) L{(r@Vu
* 7N'F]x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b6]M}ixK
*/ Z$[A.gD4
public void sort(int[] data) { M2V.FYV{j>
int[] temp=new int[data.length]; 3ON]c13
mergeSort(data,temp,0,data.length-1); v[lytX4)
} BNzL+"W
6"%[s@C
private void mergeSort(int[] data, int[] temp, int l, int r) { e {c.4'q
int i, j, k; #|$7. e
int mid = (l + r) / 2; oNiS"\t
if (l == r) !3T x\a`?/
return; E$Ge# M@dM
if ((mid - l) >= THRESHOLD) Y*"%;e$tg
mergeSort(data, temp, l, mid); xD_jfAH'
else 2RM1-j ($
insertSort(data, l, mid - l + 1); gqe z-
if ((r - mid) > THRESHOLD) 8V4Qyi|@F
mergeSort(data, temp, mid + 1, r); c&R.
else .+B!mmp
insertSort(data, mid + 1, r - mid); Fs&m'g
}Efp{E
for (i = l; i <= mid; i++) { O<%U*:B
temp = data; EBebyQcon
} )8iDjNM<
for (j = 1; j <= r - mid; j++) { iJsw:Nc
temp[r - j + 1] = data[j + mid]; R>Zn$%j\
} `SIJszqc
int a = temp[l]; AM Rj N;
int b = temp[r]; 9jvg[H
for (i = l, j = r, k = l; k <= r; k++) { zpa'G1v
if (a < b) { [N$@nA-d
data[k] = temp[i++]; *nC<1.JW
a = temp; 7s[ ATu
} else { NT8%{>F`
data[k] = temp[j--]; 4P`\fz
b = temp[j]; sRoZvp5
} t+h"YiT
} J(l6(+8
} @MN>ye'T
06=eA0JI
/** $G=\i>R.
* @param data WMI/Y9N
* @param l [NKWudq
* @param i ?X:RrZ:/
*/ wvq<5gy}
private void insertSort(int[] data, int start, int len) { VD=$:F]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *w%;$\^
} 4&&j7$aV
} OB"QWdh
} 2QBtwlQ?[
} +ckj]yA;
.b]oB_
堆排序： bz>#}P=58G
m7!l3W2
package org.rut.util.algorithm.support; J4co@=AJ
B3yn:=80
import org.rut.util.algorithm.SortUtil; "= %-
%Z}dY~:
/** *:d_~B?Tn
* @author treeroot :A 1,3g
* @since 2006-2-2 `rs1!ZJ,
* @version 1.0 tPp}/a%D
*/ TZHqn6
public class HeapSort implements SortUtil.Sort{ MD1,KH+O
*tP,Ol
/* (non-Javadoc) C8{CKrVE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RF6|zCWuI
*/ Dxu)by
public void sort(int[] data) { -><_J4
MaxHeap h=new MaxHeap(); T]i~GkD\
h.init(data); 2.:b
for(int i=0;i h.remove(); Wh4lz~D\@
System.arraycopy(h.queue,1,data,0,data.length); "Dy&`
} X0=R @_KY
'kUrSM'*$N
private static class MaxHeap{ $MsM$]~
[jLx}\]
void init(int[] data){ nl?|X2?C
this.queue=new int[data.length+1]; PH=wPft
for(int i=0;i queue[++size]=data; -,+JE0[
fixUp(size); ~#j`+
} Y#N'bvE|%
} [Zua7&(5
D@Wm-
private int size=0; KztF#[64W^
lL83LhE}<
private int[] queue; PB9<jj;
@B[=`9KF[
public int get() { m1`ln5(R
return queue[1]; S@*@*>s^
} ll5Kd=3
VLOyUt~O#
public void remove() { f|apk,o_
SortUtil.swap(queue,1,size--); SD697L9
fixDown(1); o@>5[2b4
} CiMN J
file://fixdown y\%4Dir
private void fixDown(int k) { =RV$8.Xp
int j; @lBH@HR=C
while ((j = k << 1) <= size) { %ZZ}TUI W
if (j < size %26amp;%26amp; queue[j] j++; ho:,~ A;k
if (queue[k]>queue[j]) file://不用交换 a<HM|dcst
break; ^7_<rs
SortUtil.swap(queue,j,k); 'i@Y #F%D
k = j; Lv5AtZl}
} ^^%*2^
} 7"S|GEs:
private void fixUp(int k) { kPxrI=
while (k > 1) { {fS/ZG"5<t
int j = k >> 1; Dbtw>:=
if (queue[j]>queue[k]) O=+C Kx@
break; *]H ./a:1
SortUtil.swap(queue,j,k); _R8-Hj E
k = j; &0o&!P8CB
} -BjB>Vt
} "oTwMU
J5l:_hZUV
} jwE<}y I
xW^<.@Agm
} oZzE.Q1T
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SortUtil： )_&<u\cm L
&2Y>yFB ,
package org.rut.util.algorithm; T8RQM1D_s
9^}GUJy?
import org.rut.util.algorithm.support.BubbleSort; GEvif4
import org.rut.util.algorithm.support.HeapSort; +^"|FtKhE
import org.rut.util.algorithm.support.ImprovedMergeSort; VWNmqeP
import org.rut.util.algorithm.support.ImprovedQuickSort; I 4EocM=
import org.rut.util.algorithm.support.InsertSort; >M +!i+
import org.rut.util.algorithm.support.MergeSort; (*M(gM{;
import org.rut.util.algorithm.support.QuickSort; 8,H
import org.rut.util.algorithm.support.SelectionSort; 6Es-{u(,
import org.rut.util.algorithm.support.ShellSort; HWHGxg['r
.jRXHrK;
/** k r/[|.bq
* @author treeroot CE+\|5u W
* @since 2006-2-2 vu*08<M~i|
* @version 1.0 WM"I r1
*/ `@:^(sMo
public class SortUtil { 4+uAd"
public final static int INSERT = 1; Yt{Y)=_t
public final static int BUBBLE = 2; 5ax/jd~}
public final static int SELECTION = 3; v8WoV*
public final static int SHELL = 4; f"PApV9[
public final static int QUICK = 5; k&rl%P
public final static int IMPROVED_QUICK = 6; }2{%V^D)r
public final static int MERGE = 7; N(IUNL
public final static int IMPROVED_MERGE = 8; irL ehPX9
public final static int HEAP = 9; iKdC2m
Cx@,J\rsQ
public static void sort(int[] data) { 'DKP-R"
sort(data, IMPROVED_QUICK); %RJW@~!
} 6x.#K9@q4
private static String[] name={ B,A/ -B\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,iHl;3bu
}; !!P)r1=g
3L;)asF
private static Sort[] impl=new Sort[]{ S3n$
new InsertSort(), &yP9vp="
new BubbleSort(), N2~Nc"L
new SelectionSort(), 0{jRXa-(
new ShellSort(), !e%#Zb MIo
new QuickSort(), kdv>QZ
new ImprovedQuickSort(), UyvFR@
new MergeSort(), Ddu$49{S:
new ImprovedMergeSort(), kgA')]
new HeapSort() ++FMkeHZ
}; gE%-Pf~
=*I>MgCJ
public static String toString(int algorithm){ dvUJk<;w
return name[algorithm-1]; jd$lu^>I
} udw5A*Ls
,qC_[PUT
public static void sort(int[] data, int algorithm) { Qn6&M
impl[algorithm-1].sort(data); UZXnABg,J
} {o;J'yjre1
|KkVt]ZQe9
public static interface Sort { oS]XE!^M
public void sort(int[] data); \=nY&Ml
} ]xFd_OHdb
6W$k^<S
public static void swap(int[] data, int i, int j) { F+}MW/ra@
int temp = data; ;BpuNB
data = data[j]; ;Cv x48
data[j] = temp; G<>`O;i
} #LcF;1o%o2
} rH & ^SNc