[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; (<9u-HF#
} 8A#;WG
int i1=l; 02^rV*re
int i2=mid+1; mzgfFNm^G)
for(int cur=l;cur<=r;cur++){ Zy/_ E@C}u
if(i1==mid+1) ;=z:F<Y
data[cur]=temp[i2++]; @ 6vIap|
else if(i2>r) 4WB0Pt{
data[cur]=temp[i1++]; fJg+Ryo
else if(temp[i1] data[cur]=temp[i1++]; xJe%f\UDu
else n[rCQdM&U"
data[cur]=temp[i2++]; $UwCMPs X
} ]f_p8?j"
} bt?5*ETA
mfr|:i
} z{QqY.Gu{G
~"!fP3"e
改进后的归并排序: B@ EC5Ap*
N!}f}oF
package org.rut.util.algorithm.support; %N._w!N<5n
]-#DB^EQ
import org.rut.util.algorithm.SortUtil; uY To9A
W>r+h-kR
/** J&_n9$
* @author treeroot RA 6w}:sq7
* @since 2006-2-2 ;xTpE2 -~
* @version 1.0 SXh-A1t
*/ "tK=+f`NM
public class ImprovedMergeSort implements SortUtil.Sort { PKz':_|
i%?*@uj
private static final int THRESHOLD = 10; YmG("z
}GM'.yutX
/* (ZlU^Gw#UB
* (non-Javadoc) ~xTt204S
* -9?]IIVb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u ga_T
*/ [}m[)L\
public void sort(int[] data) { UiNP3TJ'L
int[] temp=new int[data.length]; *T1_;4i
mergeSort(data,temp,0,data.length-1); DY*N|OnqJ
} EU#^7
4+tEFxvX&
private void mergeSort(int[] data, int[] temp, int l, int r) { 7yQ4*UB
int i, j, k; U<XG{<2
int mid = (l + r) / 2; "dlVk~
if (l == r) /-s6<e!
return; ;Rf'P}"]
if ((mid - l) >= THRESHOLD) LzL So"n
mergeSort(data, temp, l, mid); 1Y,Z %d
else kx^/*~ex
insertSort(data, l, mid - l + 1); K=&>t6s<
if ((r - mid) > THRESHOLD) *qq+jsA6wH
mergeSort(data, temp, mid + 1, r); XWw804ir
else {;oPLr+Z
insertSort(data, mid + 1, r - mid); J}t%p(mb
<UCl@5g&
for (i = l; i <= mid; i++) { U0+-W07>
temp = data; MQ2_`pi
} mE[y SrV
for (j = 1; j <= r - mid; j++) { V]^$S"Tv
temp[r - j + 1] = data[j + mid]; X8\GzNE~R
} An@t?#4gxi
int a = temp[l]; ssL\g`xe
int b = temp[r]; xSu >
for (i = l, j = r, k = l; k <= r; k++) { F0# 'WfM#
if (a < b) { 2AdDIVYC
data[k] = temp[i++]; mkpMfPt
a = temp; unxqkU/<Z
} else { ]$hBMuUa
data[k] = temp[j--]; Hr C+Yjp
b = temp[j]; tJmTBsn
} a'T;x`b8U,
} dr"1s-D4IQ
} ~J]qP#C
fQFk+C
/** XPPdwTOr
* @param data '%;m?t%q
* @param l ^J{:x
* @param i PY'2h4IL
*/ Sjj6q`
private void insertSort(int[] data, int start, int len) { @)}L~lb[)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y-9I3?ar
} &5;"#:ORcK
} (k P9hcV
} (m$Y<{)2
} +`15le`R
p<%d2@lp
堆排序： 4ppz,L,4
JGZBL{8
package org.rut.util.algorithm.support; I=#$8l.*
8EYkQ
import org.rut.util.algorithm.SortUtil; qgB_=Q#E
@F>D+=hS
/** [>9is=>o.
* @author treeroot gDzK{6Z}
* @since 2006-2-2 u&e~1?R
* @version 1.0 YkADk9fE
*/ A}w/OA97RO
public class HeapSort implements SortUtil.Sort{ ?A0)L27UE&
sos5Y}
/* (non-Javadoc) z9"U!A4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .Y|!:t|
*/ +,l-Nz
public void sort(int[] data) { 'fW-Y!k%
MaxHeap h=new MaxHeap(); L50n8s
h.init(data); wM{s|Ay
for(int i=0;i h.remove(); ig"L\ C"T
System.arraycopy(h.queue,1,data,0,data.length); tX[WH\(xI
} bd`P0f?
9JwPSAo;
private static class MaxHeap{ H*6W q
R-14=|7a-
void init(int[] data){ _dU\JD
this.queue=new int[data.length+1]; Xc.`-J~Il
for(int i=0;i queue[++size]=data; 4!$"ayGv;D
fixUp(size); zeRyL3fnmb
} m+9#5a-
} 0`H# '/
qSQ~D(tO
private int size=0; 1*7@BP5
kcEeFG;DQ
private int[] queue; lRQYpc\
@nf`Gw ;
public int get() { |uDdHX8T
return queue[1]; `u\n0=go
} M%#e1"n
2qp#N%
public void remove() { P2Y^d#jO
SortUtil.swap(queue,1,size--); d5d@k
fixDown(1); `h;[TtIX4
} >sbu<|]a 7
file://fixdown S>{~nOYt-`
private void fixDown(int k) { =c7;r]Ol
int j; V8(-
while ((j = k << 1) <= size) { /RF7j;
if (j < size %26amp;%26amp; queue[j] j++; IA(5?7x`<
if (queue[k]>queue[j]) file://不用交换 7z-[f'EIUI
break; ^Dx&|UwiZa
SortUtil.swap(queue,j,k); w =KPT''!
k = j; %)n=x ne
} jdBLsy@
} Pz^544\~ou
private void fixUp(int k) { 4P0}+
while (k > 1) { 11lsf/IP
int j = k >> 1; D{!IW!w
if (queue[j]>queue[k]) xC?h2hIt
break; <GsuZ
SortUtil.swap(queue,j,k); e(yh[7p=
k = j; n`KY9[0U=
} @pxcpXCy
} G&dKY h\
KSL`W2}
} F!do~Z
Debv4Gr;^
} =lC7gS!U
n:X y6H
SortUtil： 7o4\oRGV
3a|\dav%
package org.rut.util.algorithm; m kexc~l
@WB@]-+J T
import org.rut.util.algorithm.support.BubbleSort; nP$9CA
import org.rut.util.algorithm.support.HeapSort; ElXFeJ%[G
import org.rut.util.algorithm.support.ImprovedMergeSort; s@C}P
import org.rut.util.algorithm.support.ImprovedQuickSort; IK]d3owA
import org.rut.util.algorithm.support.InsertSort; y}H!c;
import org.rut.util.algorithm.support.MergeSort; \Cj B1]I
import org.rut.util.algorithm.support.QuickSort; 7d vnupLh
import org.rut.util.algorithm.support.SelectionSort; `x|?&Ytmf9
import org.rut.util.algorithm.support.ShellSort; p#Bi>/C6
Z]ONh
/** <}LC~B!
* @author treeroot 5X+A"X ;C
* @since 2006-2-2 Yw9GN2AG
* @version 1.0 S[N5 ikg
*/ W4N{S.#!
public class SortUtil { F5Va+z,jg
public final static int INSERT = 1; +qoRP2
public final static int BUBBLE = 2; b]y2+A.n
public final static int SELECTION = 3; h\e.e3/
public final static int SHELL = 4; Y0>y8UV
public final static int QUICK = 5; Z}QB.$&
public final static int IMPROVED_QUICK = 6; % `3jL7|
public final static int MERGE = 7; iB{V^ksU
public final static int IMPROVED_MERGE = 8; fIF8%J ^3
public final static int HEAP = 9; 7 3m1
$^P0F9~0
public static void sort(int[] data) { ZW}_DT0
sort(data, IMPROVED_QUICK); l,8##7
} MPV5P^@X
private static String[] name={ nR~(0G,H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nK,w]{<wG!
}; hQi2U
KSvE~h[#+
private static Sort[] impl=new Sort[]{ ys~x$
new InsertSort(), o@Oqm>]SS
new BubbleSort(), nlYNN/@"
new SelectionSort(), OCUr{Nh
new ShellSort(), &vJH$R
new QuickSort(), :>*7=q=
new ImprovedQuickSort(), r,udO,Yi=c
new MergeSort(), ;fJ.8C
new ImprovedMergeSort(), TN.rrop`#g
new HeapSort() /\Ef%@
}; 9UkBwS`
@VBcJ{e,
public static String toString(int algorithm){ "#]$r
return name[algorithm-1]; !?XC1xe~R
} IU[ [H#
#jk_5W
public static void sort(int[] data, int algorithm) { TO_e^A#
impl[algorithm-1].sort(data); `g,..Ns-r
} NgwbQ7)
WM{=CD
public static interface Sort { xmX 4qtAL
public void sort(int[] data); /B3iC#?
} G"6 !{4g
O}P`P'Y|'
public static void swap(int[] data, int i, int j) { *fdTpXa
int temp = data; ~BF&rx5Q
data = data[j]; j6YOKJX
data[j] = temp; ;,TFr}p`
} \8 ":]EU
} ?(PKeq6