[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; +A_J1iJ<
} #!J(4tXny
int i1=l; RuW!*LI
int i2=mid+1; 4b]a&_-}
for(int cur=l;cur<=r;cur++){ @+,pN6}g
if(i1==mid+1) p\vMc\
data[cur]=temp[i2++]; [|`U6 8}u
else if(i2>r) =TvzS%U
data[cur]=temp[i1++]; + bhym+
else if(temp[i1] data[cur]=temp[i1++]; ?ne_m:J[
else cFd >oDS
data[cur]=temp[i2++]; O OFVnu
} y? (2U6c
} !7B\Xl'S
9<CG s3\
} -5G)?J/*
\6|/RFT
改进后的归并排序: 1{"llD
"R #k~R
package org.rut.util.algorithm.support; OvL\u{(<F
%T`U^Pnr
import org.rut.util.algorithm.SortUtil; tS# `.F~y
SJ' % ^
/** Ac k}QzXO
* @author treeroot }peBR80tQ
* @since 2006-2-2 pe0x""K
* @version 1.0 P3tx|:gV
*/ 9$K;Raz%
public class ImprovedMergeSort implements SortUtil.Sort { 7J$b$P0}
}71LLzG`/
private static final int THRESHOLD = 10; .~lKBkS`!
wz8PtfZ
/* 6&v?)o
* (non-Javadoc) 3cl9wWlJ_E
* iyx>q!P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FXKF\1`(H
*/ T0HuqJty
public void sort(int[] data) { cRvvzX
int[] temp=new int[data.length]; :q3+AtF
mergeSort(data,temp,0,data.length-1); 3-s}6<0v1
} ^u)z{.z'H/
Sywu=b
private void mergeSort(int[] data, int[] temp, int l, int r) { "LhUxnll
int i, j, k; Zzua17
int mid = (l + r) / 2; ?gGt2O1J
if (l == r) eZhPu'id\s
return; S|AM9*k9
if ((mid - l) >= THRESHOLD) %u{W7
mergeSort(data, temp, l, mid); z:Sigo_z[
else mbl]>JsQD
insertSort(data, l, mid - l + 1); OY-w?'p?W
if ((r - mid) > THRESHOLD) E&$_`m;
mergeSort(data, temp, mid + 1, r); I&c ~8Dw
else c{ZY,C&<
insertSort(data, mid + 1, r - mid); 9Vuq,dv
q=HHNjj8
for (i = l; i <= mid; i++) { ;E2>Ovv
temp = data; }]1BO
} XhzGLYb~I`
for (j = 1; j <= r - mid; j++) { 1&=0Wg0ig
temp[r - j + 1] = data[j + mid]; +#@"*yj3
} 0X2@CPIFf
int a = temp[l]; _&3<6$}i"
int b = temp[r]; @*N)i?>
for (i = l, j = r, k = l; k <= r; k++) { O^>jdl!TZ
if (a < b) { oz'\q0
data[k] = temp[i++]; ivgpS5 M`Y
a = temp; gJt`?8t
} else { @xsP5je]
data[k] = temp[j--]; :m=m}3/:
b = temp[j]; {@}?k s5
} :yT-9Ze%q
} ExSe=4q#
} /T^ JS
r9 y.i(j
/** NBh%:tu7M
* @param data PHg48Y"Nd
* @param l g_*T?;!.U
* @param i :^ i9]
*/ 6< J #^ 6
private void insertSort(int[] data, int start, int len) { =!Vf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z{IUy
} $DFv30 f
} "Y`3DxXz
} 1:C:?ZC#c
} 4Ph0:^i_
6SJ"Tni8
堆排序： \u-0v.+|
|as!Ui/J/
package org.rut.util.algorithm.support; 9DQ)cy
C<^YVeG
import org.rut.util.algorithm.SortUtil; yn AB
hjZ}C+=O
/** d|9b~_::V
* @author treeroot QR?yG+VU
* @since 2006-2-2 RhI;;Y#@
* @version 1.0 MmPU7Nl%X
*/ 3:/'t{ ^B
public class HeapSort implements SortUtil.Sort{ 4rK{-jvh>m
%z]U LEYrZ
/* (non-Javadoc) h<<>3A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @K223?c8l
*/ sRVIH A,
public void sort(int[] data) { <%}QDO8\i
MaxHeap h=new MaxHeap(); )"(]Lf's
h.init(data); h!@|RW&}qX
for(int i=0;i h.remove(); |LG4=j.l
System.arraycopy(h.queue,1,data,0,data.length); gyHHoZc3
} &adI (s~
-W{DxN1
private static class MaxHeap{ <`X"}I3ba
l}^3fQXI
void init(int[] data){ a?} .Fs
this.queue=new int[data.length+1]; W+wA_s2&D
for(int i=0;i queue[++size]=data; 'k;4j|<
fixUp(size); [97:4.
} ,&PE6hn
} 5hj
bUV >^d
private int size=0; z't??6
J2q,7wI#
private int[] queue; 'oNO-)p\#!
HjvCujJ
public int get() { ( m\$hX
return queue[1]; 7qOa ;^T
} 7*Qk`*Ii
H~eRT1
public void remove() { wS+V]`b
SortUtil.swap(queue,1,size--); =@Dwlze
fixDown(1); fy@avo9
} <99M@ cF
file://fixdown 7A\Cbu2tf
private void fixDown(int k) { ` 8W*
int j; !g~1&Uw1
while ((j = k << 1) <= size) { UX-&/eScN
if (j < size %26amp;%26amp; queue[j] j++; Y3kA?p0
if (queue[k]>queue[j]) file://不用交换 o)6pA^+
break; rn DCqv!'P
SortUtil.swap(queue,j,k); NW~z&8L
k = j; Er/bO
} 4v p
} mOo`ZcTU
private void fixUp(int k) { IcP)FB4
while (k > 1) { &1%q"\VI
int j = k >> 1; wB'zuPAK6
if (queue[j]>queue[k]) 3mPjpm
break; Z,BC*
SortUtil.swap(queue,j,k); YV=QF J'
k = j; f}guv~K
} \xg]oKbn
} N@B9 @8h
Bq/:Nd[y
} Cg*H.f%Mr
p=/m
} .CP&bJP%
!4]9!<.k
SortUtil： NvM*h%ChM
(&$VxuJ+6y
package org.rut.util.algorithm; k X {0y
a^,(v
import org.rut.util.algorithm.support.BubbleSort; TAjh"JJIV
import org.rut.util.algorithm.support.HeapSort; $mF_,|
import org.rut.util.algorithm.support.ImprovedMergeSort; d[rv1s>i
import org.rut.util.algorithm.support.ImprovedQuickSort; c8Z wr]DF
import org.rut.util.algorithm.support.InsertSort; =4d (b ;
import org.rut.util.algorithm.support.MergeSort; Bc3:}+l
import org.rut.util.algorithm.support.QuickSort; zB yqD$
import org.rut.util.algorithm.support.SelectionSort; (8_\^jJ
import org.rut.util.algorithm.support.ShellSort; IK*07h/!
p~LrPWHSTP
/** mN8pg4
* @author treeroot "RIZV
* @since 2006-2-2 @{Gncy|
* @version 1.0 Ty88}V
*/ ;c$J=h]
public class SortUtil { F;^F+H
public final static int INSERT = 1; 9mZ
public final static int BUBBLE = 2; =B.F;40
public final static int SELECTION = 3; $1SUU F\.
public final static int SHELL = 4; Q_l'o3
public final static int QUICK = 5; @JdZ5Q
public final static int IMPROVED_QUICK = 6; NHlk|Y#6b
public final static int MERGE = 7; -*.-9B~u
public final static int IMPROVED_MERGE = 8; s+>:,U<A
public final static int HEAP = 9; +^;JS3p@\
[$[:"N_
public static void sort(int[] data) { k{t`|BnPKB
sort(data, IMPROVED_QUICK); ~i 7^P9
} >LDhU%bH
private static String[] name={ 1'?4m0W1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4`,j=3
}; 47J5oPT2'
qP<Lr)nUH
private static Sort[] impl=new Sort[]{ B#9{-t3Vf
new InsertSort(), DK}"b}Fvq
new BubbleSort(), ;J7F J3n
new SelectionSort(), 5atYOep
new ShellSort(), ~K@'+5Pc
new QuickSort(), L@fY$Rw
new ImprovedQuickSort(), u{L!n$D7
new MergeSort(), =FD;~
new ImprovedMergeSort(), 5eWwgA
new HeapSort() ({o'd=nO
}; o=1X^,
NFv>B>
public static String toString(int algorithm){ )2M>3C6>f
return name[algorithm-1]; 6^DR0sO
} uG<}N=
2it?$8#i
public static void sort(int[] data, int algorithm) { CD8}I85K
impl[algorithm-1].sort(data); |ZQ@fmvL/p
} C`q@X(_
"^Ybs'-
public static interface Sort { Q%f|~Kl-hd
public void sort(int[] data); TiH)5
} ~zw]5|
#^]n0!
public static void swap(int[] data, int i, int j) { nl9P, d
int temp = data; yxc=Z0~1
data = data[j]; 0Zg%+)iy@
data[j] = temp; 3'X.}>o
} SCTA=l.
} ,GgAsj: K