[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; (m:Q'4Ep
} ) hs&?:)
int i1=l; \tYImh
int i2=mid+1; JCnHEH
for(int cur=l;cur<=r;cur++){ O}zHkcL
if(i1==mid+1) npltsK):
data[cur]=temp[i2++]; 4 H0rS'5d
else if(i2>r) YiO}"
data[cur]=temp[i1++]; UTh2?Rh/
else if(temp[i1] data[cur]=temp[i1++]; 2PyuM=(Wt
else s_/@`kd{
data[cur]=temp[i2++]; v77UE"4|c
} klnNBo!
} 94PI
dxAGO(
} v)_c*+6u
.O1w-,=
改进后的归并排序: nMzt_IlI
5@%Gq)z5
package org.rut.util.algorithm.support; \ YF@r7
Zt!$"N.,
import org.rut.util.algorithm.SortUtil; 1[O cZCS
Z,2?TT|p
/** \#]%S/_ A
* @author treeroot 'RKpMdoz
* @since 2006-2-2 ,]wQ]fpt
* @version 1.0 >8I~i:hn
*/ 3]?='Qq.(
public class ImprovedMergeSort implements SortUtil.Sort { G<-KwGy,D
4AJT)I.
private static final int THRESHOLD = 10; %<nGm\
8iaMr278W
/* &?bsBqpN
* (non-Javadoc) ~/K&=xE
* NzyEsZ]$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "=s}xAM|A
*/ |Jd8ul:&e
public void sort(int[] data) { Y+Z+Y)K
int[] temp=new int[data.length]; tqh)yr;
mergeSort(data,temp,0,data.length-1); ,\"x#Cc f
} V[kJ;YLPN
BedL `[,
private void mergeSort(int[] data, int[] temp, int l, int r) { |e@1@q(a[]
int i, j, k; Q2ne]MI
int mid = (l + r) / 2; L;")C,CwQ
if (l == r) \-]Jm[]^
return; GBb8}lx
if ((mid - l) >= THRESHOLD) I\6C0x
mergeSort(data, temp, l, mid); %/w-.?bX
else eC"e v5v
insertSort(data, l, mid - l + 1); O713'i
if ((r - mid) > THRESHOLD) /} PdO
mergeSort(data, temp, mid + 1, r); m}?jU
else #Y7iJPO
insertSort(data, mid + 1, r - mid); ];Noe9o
YT!iI
for (i = l; i <= mid; i++) { @-S7)h>~
temp = data; :2c(.-[`
} 6/L[`n"G
for (j = 1; j <= r - mid; j++) { _VdJFjY?zc
temp[r - j + 1] = data[j + mid]; Z72%Bv
} n$SL"iezW?
int a = temp[l]; bS8$[7OhX
int b = temp[r]; 7=fNvES2
for (i = l, j = r, k = l; k <= r; k++) { xI?'Nh
if (a < b) { 9?ll(5E
data[k] = temp[i++]; A]0R?N9wb_
a = temp; H4 O"^#5
} else { v1yB
data[k] = temp[j--]; [C4{C4TX
b = temp[j]; q[qX O5
} 8BAe6-*S8
} s-Gd{=%/q
} 6/wC StZ
oe^JDb#
/** n Yx[9HN
* @param data `Z>=5:+G@2
* @param l #pAN
* @param i 81|[Y'f
*/ &&<l}E
private void insertSort(int[] data, int start, int len) { Szu@{lpP@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8v4krz<Iq
} igTs[q=Ak
} K{I"2c
} 5Xxdm-0
} Gq1C"s$4'
<ndY6n3
堆排序： J)Yz@0#T(;
Hfj.8$
package org.rut.util.algorithm.support; nt>3i! l
/!Ag/SmS!9
import org.rut.util.algorithm.SortUtil; y{(Dv}
j07A>G-=
/** Cd^1E]O0{
* @author treeroot !U4YA1>>
* @since 2006-2-2 g/$RuT2U
* @version 1.0 <bW~!lv
*/ \bF<f02P
public class HeapSort implements SortUtil.Sort{ R$u1\r1I
F7C+uGTs
/* (non-Javadoc) 4Hf'/%kW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XLiwE$:t%
*/ ~5|R`%
public void sort(int[] data) { l=P)$O|=w
MaxHeap h=new MaxHeap(); s~(`~Y4
h.init(data); )Az0.}
for(int i=0;i h.remove(); b(@GKH"W
System.arraycopy(h.queue,1,data,0,data.length); Es}`SIe/
} ^2BiMH3j
E]vox~xK>
private static class MaxHeap{ S3HyB b
vD#kH1
void init(int[] data){ voRb>xF
this.queue=new int[data.length+1]; g51UIN]o-
for(int i=0;i queue[++size]=data; Zp{K_ec{
fixUp(size); B)DuikV.D
} jpYZ) So-
} % mPv1$FH
,\+N}F^
private int size=0; PQ_A^95
AwuhFPG
private int[] queue; w#BT/6W&G
@`B_Q v@
public int get() { S/eplz;
return queue[1]; -0`n(`2
} er BerbEEH
{ **W7\h
public void remove() { *@@dO_%6
SortUtil.swap(queue,1,size--); "-:g.x*d
fixDown(1); j)ln"u0R^B
} "tJ[M
file://fixdown vY4}vHH2
private void fixDown(int k) { WyB^b-QmDh
int j; 73u97oe>1
while ((j = k << 1) <= size) { mcQ A'
if (j < size %26amp;%26amp; queue[j] j++; pR2U&OA
if (queue[k]>queue[j]) file://不用交换 wLI1qoDM
break; %'. x vC
SortUtil.swap(queue,j,k); NuF?:L[
k = j; 7nxH>.,Q>
} -e"kJd&V
} xp^Jp
private void fixUp(int k) { GHi'ek<?^
while (k > 1) { @+Nf@LJ
int j = k >> 1; fY=:geB
if (queue[j]>queue[k]) hc]p^/H
break; T_wh)B4xW
SortUtil.swap(queue,j,k); #Ddo` >`&
k = j; /Trbr]lWy
} 7&jq =
} 3TV4|&W;
D\J.6W
} x<w-j[{k_K
6e.l# c!1}
} 7z\#"~(.
h{\S'8
SortUtil： hfc~HKLC
=?]S8cth
package org.rut.util.algorithm; ][//G|9
;2?fz@KZ
import org.rut.util.algorithm.support.BubbleSort; XCyb[(4
import org.rut.util.algorithm.support.HeapSort; m#_M"B.cm
import org.rut.util.algorithm.support.ImprovedMergeSort; L"c.15\
import org.rut.util.algorithm.support.ImprovedQuickSort; e^;:iJS
import org.rut.util.algorithm.support.InsertSort; b ettOg
import org.rut.util.algorithm.support.MergeSort; 1jBIi
import org.rut.util.algorithm.support.QuickSort; Xyz/CZPi
import org.rut.util.algorithm.support.SelectionSort; Zv mkb%8
import org.rut.util.algorithm.support.ShellSort; ;5T}@4m|r
yP` K [/
/** rkdA4'66w
* @author treeroot M djxTr^
* @since 2006-2-2 N<KsQsy=
* @version 1.0 `|92!Ej
*/ ;1_3E2E$
public class SortUtil { &Wdi 5T8
public final static int INSERT = 1; !"E/6z2&(k
public final static int BUBBLE = 2; 9G7Brs:
public final static int SELECTION = 3; Bz%wV-
public final static int SHELL = 4; Wi\k&V.mE
public final static int QUICK = 5; \fvm6$ rZ^
public final static int IMPROVED_QUICK = 6; ^rY18?XC+:
public final static int MERGE = 7; ,j(E>g3
public final static int IMPROVED_MERGE = 8; ]w4?OK(j
public final static int HEAP = 9; ^,f^YL;
ESFJN}Q%0.
public static void sort(int[] data) { v/vPU
sort(data, IMPROVED_QUICK); F]<2nb7
} 96; gzG@1!
private static String[] name={ IQd~` G
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Tgla_sMb
}; b8%TwYp
{od@Sl
private static Sort[] impl=new Sort[]{ QWt3KW8)
new InsertSort(), Azr|cKu]
new BubbleSort(), d}|z+D
new SelectionSort(), T>hm\!
new ShellSort(), QaA?UzB
new QuickSort(), 5xj8^W^G9
new ImprovedQuickSort(), "So"oT1
new MergeSort(), (?GW/pLK]
new ImprovedMergeSort(), 1BP/,d |+
new HeapSort() sS4V(:3s
}; t-}IKrbv
![I|hB
public static String toString(int algorithm){ Dwr"-
return name[algorithm-1]; f+)LVT8p
} a>d`g
/m^G 99N
public static void sort(int[] data, int algorithm) { yVKl%GO
impl[algorithm-1].sort(data); GlC(uhCpV
} *L Y6hph"
OOABn*
public static interface Sort { Fs=)*6}&
public void sort(int[] data); X68.*VHh0
} Ty7`&
FKhgUnw
public static void swap(int[] data, int i, int j) { @FF{lK?[
int temp = data; ofI,[z3
data = data[j]; sint":1FC
data[j] = temp; JFNjc:4{0
} !HhF*Rlr
} s%~Nx3,