[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; e.L&A|
} ~D5FnN9
int i1=l; } *)l
int i2=mid+1; %S"z9@
for(int cur=l;cur<=r;cur++){ uSYI X
if(i1==mid+1) JE{cZ<NNH
data[cur]=temp[i2++]; $X;OK
else if(i2>r) >{(c\oMD
data[cur]=temp[i1++]; \i[N";K
else if(temp[i1] data[cur]=temp[i1++]; 72RTEGy
else ,F->*=
data[cur]=temp[i2++]; 837:;<T
} kuBtPZ
} QZ(O2!Mg
8IL5:7H8
} m Qx1co
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改进后的归并排序: X} V]3
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package org.rut.util.algorithm.support; FTEC=j$ln
Yur}<>`(
import org.rut.util.algorithm.SortUtil; 0Y* "RbG
7>@0nHec
/** g,*fpk
* @author treeroot :Kyr}-
* @since 2006-2-2 4MDVR/Z7
* @version 1.0 r9(c<E?,h
*/ J R~s`>2
public class ImprovedMergeSort implements SortUtil.Sort { GCQOjqiR
H/[(T%]o
private static final int THRESHOLD = 10; ,1|=_M31
c|m?f
/* 0)PZS>
* (non-Javadoc) hC{2LLu;n
* HW_2!t_R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |9 *$6Y
*/ &{WEtaXaa
public void sort(int[] data) { bZK`]L[
int[] temp=new int[data.length]; 4E!Pxjl3a
mergeSort(data,temp,0,data.length-1); `m_fi
} Z$Ps_Ik
"/^kFsvp
private void mergeSort(int[] data, int[] temp, int l, int r) { N8r+Q%ov
int i, j, k; {Xpjm6a7
int mid = (l + r) / 2; R. ryy
if (l == r) T3)m{gv0`
return; }EfRYE$E
if ((mid - l) >= THRESHOLD) },5LrX`L
mergeSort(data, temp, l, mid); 3\<(!yY8
else Um/ g&k
insertSort(data, l, mid - l + 1); |QH )A
if ((r - mid) > THRESHOLD) \q-["W34
mergeSort(data, temp, mid + 1, r); )d {8Cu6
else RKs_k`N0
insertSort(data, mid + 1, r - mid); -Vg0J6x
JKXIxw>q
for (i = l; i <= mid; i++) { h*[sV
temp = data; OH+2)X
} Q6X}R,KA1
for (j = 1; j <= r - mid; j++) { [nsTO5G$u
temp[r - j + 1] = data[j + mid]; 9fSX=PVRmQ
} ,n5 [Y)
int a = temp[l]; =8qhK=&]
int b = temp[r]; sD XJXJZ
for (i = l, j = r, k = l; k <= r; k++) { EX3;|z@5;
if (a < b) { =6w(9O
data[k] = temp[i++]; !.{{QwZ
a = temp; 4~:D7",Jn
} else { ?=Z0N&}[
data[k] = temp[j--]; ]7dal [i
b = temp[j]; xaSiG
} 8\Z/mU*4
} %}Ob~m>P
} @2$iFZq~
dNs<`2m
/** BA0.B0+"
* @param data ^UpwVKdP
* @param l :}w^-I"
* @param i }JWk?
*/ 7\;gd4Ua1
private void insertSort(int[] data, int start, int len) { nr9cG/"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pe@/tO&I
} POUD*(DqNK
} =:'a)o
} </d&bS
} lhV'Q]s@6
}NJ? .Y
堆排序： d5B96;3
bPdbKi{j@
package org.rut.util.algorithm.support; _\xd]~ELj
uO`YA]
import org.rut.util.algorithm.SortUtil; S)\%.~ n
4mzWNr>fb
/** 'roZ:NE
* @author treeroot wq&TU'O
* @since 2006-2-2 lN^} qg><
* @version 1.0 |LDo<pE*V4
*/ KIUa
public class HeapSort implements SortUtil.Sort{ 2L_ts=
H0B"?81
/* (non-Javadoc) rj].bGQ,+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `#~HCl
*/ O8:,XTAN
public void sort(int[] data) { GzUgzj|BN~
MaxHeap h=new MaxHeap(); fOyLBixR
h.init(data); bP 2IX
for(int i=0;i h.remove(); :xT=uE.I
System.arraycopy(h.queue,1,data,0,data.length); J5Tl62}
} WNPdym
NN W*
private static class MaxHeap{ <4Jo1
q|%(47}z
void init(int[] data){ AcYL3
this.queue=new int[data.length+1]; [Hww3+~+
for(int i=0;i queue[++size]=data; |3MqAvPJ
fixUp(size); Ot]PH[+
} `_'I 9,.a
} oY{r83h{
bg)yliX
private int size=0; vxo iPqo
*qE[Y0Cd
private int[] queue; )nS;]7pB@
,g$N
public int get() { :R<n{%~
return queue[1]; -_ [Z5%B
} dt 4_x1
#IP<4"Hf
public void remove() { mYN|)QVKy
SortUtil.swap(queue,1,size--); @fbB3
fixDown(1); c]W]m`:
} *"Ipu"G5?
file://fixdown t\]CdH`+
private void fixDown(int k) { lV^sVN Z]
int j; c;ELAns>
while ((j = k << 1) <= size) { Kl$!_$
if (j < size %26amp;%26amp; queue[j] j++; g/4.^c
if (queue[k]>queue[j]) file://不用交换 R/iw#.Yy
break; u[^(s_
SortUtil.swap(queue,j,k); 0@t/j<5o
k = j; W]n%$a
} gRKmfJ*u
} UPPDs"
private void fixUp(int k) { LeY\{w
while (k > 1) { oG5JJpLT
int j = k >> 1; ){")RrD(
if (queue[j]>queue[k]) l9q ygh
break; 1z$;>+g<
SortUtil.swap(queue,j,k); -rlxxLT+
k = j; yU*j{>%RsK
} s0.yPA
} /z,sM"d
#Qy*zU#9
} NQ{ XIN~
X1i6CEa<
} h&5H`CR[
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SortUtil： 7Z"mVh}
wI}5[m
package org.rut.util.algorithm; q=}Lm;r
~|pVz/s|G
import org.rut.util.algorithm.support.BubbleSort; yIbz\3
import org.rut.util.algorithm.support.HeapSort; EH]5ZZ[Z
import org.rut.util.algorithm.support.ImprovedMergeSort; ^Y~ ,s
import org.rut.util.algorithm.support.ImprovedQuickSort; FcsEv {#U
import org.rut.util.algorithm.support.InsertSort; Hv<%_t_/
import org.rut.util.algorithm.support.MergeSort; JHc|.2Oe
import org.rut.util.algorithm.support.QuickSort; ,ibI@8;#~'
import org.rut.util.algorithm.support.SelectionSort; yK0Q,
import org.rut.util.algorithm.support.ShellSort; 0;3;Rs
91%+Bf()J6
/** 0:h;ots'
* @author treeroot -^$CGRE6A
* @since 2006-2-2 $ZXy&?4
* @version 1.0 @"kA&=0;|J
*/ JXGIVH?Rpu
public class SortUtil { )Bl% {C
public final static int INSERT = 1; HQaKG4Z
public final static int BUBBLE = 2; ,ye>D='
public final static int SELECTION = 3; =1^Ru*G
public final static int SHELL = 4; @o44b!i
public final static int QUICK = 5; Nt&}T
public final static int IMPROVED_QUICK = 6; FI*.2rdSR
public final static int MERGE = 7; Z,,Da|edH
public final static int IMPROVED_MERGE = 8; u$&7fmZ
public final static int HEAP = 9; f&ZxG,]Hi
8S@ ~^D
public static void sort(int[] data) { A!<R?
sort(data, IMPROVED_QUICK); eOD;@4lR
} _xAdvr' W
private static String[] name={ ^gH.5L0]gH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" M$%aX,nk'
}; .-`7Av+7
{;Mcor3
private static Sort[] impl=new Sort[]{ zEF3B
new InsertSort(), =d7lrx+z
new BubbleSort(), {NKDmeg:D
new SelectionSort(), =NF},j"
new ShellSort(), !F;W#Gc
new QuickSort(), ]![ewO@
new ImprovedQuickSort(), f&8&UL>e`
new MergeSort(), e@Z(z^V
new ImprovedMergeSort(), sTeL4g|%{
new HeapSort() `8xe2=Ub
}; \KLWOj%
= Yh>5A
public static String toString(int algorithm){ *FK!^Y
return name[algorithm-1]; Qgo0uuM
} /r[0Dw
/Kwo^Q{
public static void sort(int[] data, int algorithm) { <|hvH
impl[algorithm-1].sort(data); O#Xq0o
} +To{Tm-
&Zd{ElM
public static interface Sort { hP`3Ao
public void sort(int[] data); K$#(\-M
} h+,zfVJu
2!7wGXm~U
public static void swap(int[] data, int i, int j) { ]#j]yGV
int temp = data; Gow_a'
data = data[j]; IA$:r@QNx8
data[j] = temp; =6ZZ/+6b
} rm+|xvZ4
} EtcAU}9