[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; S$)*&46g
} >Y7a4~ufko
int i1=l; ^d}gpin
int i2=mid+1; &LO"g0w
for(int cur=l;cur<=r;cur++){ 1 `^Rdi0
if(i1==mid+1) X cr =
data[cur]=temp[i2++]; <8,o50`B
else if(i2>r) >r`b_K
data[cur]=temp[i1++]; dzLQI}89+k
else if(temp[i1] data[cur]=temp[i1++]; \B F*m"lz
else 1"Z@Q`}
data[cur]=temp[i2++]; 4iAZ+l5&
} 'c2W}$q
} De7Ts
A?_=K
} ZkL8e
E)Gw0]G
改进后的归并排序: 2M#M"LHo
OsBo+fwT
package org.rut.util.algorithm.support; <,o>Wx*1C
W} WI; cI
import org.rut.util.algorithm.SortUtil; Lbe\@S
.2d9?p3Y
/** :w}{$v}#D;
* @author treeroot T134ZXqqz
* @since 2006-2-2 ojYbR<jn9
* @version 1.0 JB!:JML
*/ Vk< LJ S
public class ImprovedMergeSort implements SortUtil.Sort { |*Z$E$k:
)u))n#P
private static final int THRESHOLD = 10; 7Q\|=$2
XE^)VLH:
/* _zlqtO
* (non-Javadoc) zvABU+{jD
* BA\/YW @
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u]}s)SmDk
*/ l/;X?g5+
public void sort(int[] data) { :0Z^uuk`gq
int[] temp=new int[data.length]; "KcA
mergeSort(data,temp,0,data.length-1); c/c$D;T
} <: &*
dJ$"l|$$
private void mergeSort(int[] data, int[] temp, int l, int r) { ga?*DI8w
int i, j, k; d%l{V6
int mid = (l + r) / 2; $kR N h6
if (l == r) OL4z%mDZi
return; %$%&m1Y
if ((mid - l) >= THRESHOLD) {U&.D [{&
mergeSort(data, temp, l, mid); vJAZ%aW
else !9 fz(9
insertSort(data, l, mid - l + 1); Gt9&)/#
if ((r - mid) > THRESHOLD) IV\J3N^
mergeSort(data, temp, mid + 1, r); 2WUT/{:X
else Uj&W<'I
insertSort(data, mid + 1, r - mid); xsWur(>]
\*=7#Vd
for (i = l; i <= mid; i++) { 'SQG>F Uy
temp = data; ,{\Bze1fn
} nUkaz*4qU
for (j = 1; j <= r - mid; j++) { '_|h6<.k[
temp[r - j + 1] = data[j + mid]; XL7h}
} lu Q~YjH
int a = temp[l]; aF03a-qw<
int b = temp[r]; cuOvN"nuNj
for (i = l, j = r, k = l; k <= r; k++) { %Uz(Vd#K
if (a < b) { =8U&[F
data[k] = temp[i++]; R<B7K?SxV~
a = temp; 7GDHz.IX
} else { GhPK-+"X
data[k] = temp[j--]; ,3nN[)dk
b = temp[j]; OY?y^45y
} JN7k2]{
} <&)v~-&O
} @&[T _l
Y@PI {;!
/** /x3/Ubmz~x
* @param data {Zp\^/
* @param l hYawU@R
* @param i Ef<b~E@
*/ \QmCeB
private void insertSort(int[] data, int start, int len) { IIy~[4dW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~'R(2[L!;
} S_~z-`;h!
} qCv20#!"|
} :;t #\%L/
} uc|45Zxt
?yh}/T\qp
堆排序： *L!!]Q2c
MDF%\Sx
package org.rut.util.algorithm.support; g2unV[()_
=J1rlnaaEL
import org.rut.util.algorithm.SortUtil; ~axjjv
CKA;.sh
/** Rp$}YN
* @author treeroot EI\9_}@,
* @since 2006-2-2 mFHH515
* @version 1.0 `5H$IP1XhA
*/ `"%T=w
public class HeapSort implements SortUtil.Sort{ *OQG4aWy
4lZ$;:Jg
/* (non-Javadoc) q%ow/!\;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $0arz{Oh
*/ ,^S@EDq
public void sort(int[] data) { !0N7^Z"gtz
MaxHeap h=new MaxHeap(); 37;$-cFE
h.init(data); jM\*A#Jo5
for(int i=0;i h.remove(); vVL@K,q
System.arraycopy(h.queue,1,data,0,data.length); `9 {mr<
} [e1S^pI
s|D>-
private static class MaxHeap{ LdB($4,
3"rzb]=R
void init(int[] data){ 1h.)#g?{
this.queue=new int[data.length+1]; }.z&P'
for(int i=0;i queue[++size]=data; 7.j[a*^
fixUp(size); .;&# )l
} '?({;/L
} Znetzm=0
8/K!SpM*d
private int size=0; *28pRvY:b
`_&Vt=7lG
private int[] queue; RxQh2<?
YBnA+l*
public int get() { itzyCw2|#
return queue[1]; zq%D/H6J,
} frBX{L
!Kv@\4
public void remove() { &7_Qd4=08w
SortUtil.swap(queue,1,size--); Ja ,Cvt
fixDown(1); _!|/ ;Nk
} pJ ?~fp
file://fixdown Pzb|t+"$
private void fixDown(int k) { MCdx?m3]
int j; WKSPBT;
while ((j = k << 1) <= size) { "]\+?
if (j < size %26amp;%26amp; queue[j] j++; mA{~PpSb
if (queue[k]>queue[j]) file://不用交换 RN@ctRS
break; h`3eu;5)
SortUtil.swap(queue,j,k); =w$}m_AM
k = j; w}CmfR
} 5^j45'%I
} xzx$TUL
private void fixUp(int k) { T,$WlK Wj
while (k > 1) { kCXdGhb
int j = k >> 1; `l*;t`h
if (queue[j]>queue[k]) I<A6Z&*un
break; ?ByM[E$
SortUtil.swap(queue,j,k); xz:J
k = j; y_.!!@,
} 2./3 \n2
} +Y+Y6Ac[}
r:]1O*
} *& m#qEv
t3+Py7qv
} TXZv2P9
\Vl`YYjZ
SortUtil： )*:`':_a
Dwl3Cj
package org.rut.util.algorithm; pBw0"ff
S~Id5T:,
import org.rut.util.algorithm.support.BubbleSort; ~ Uo)0
import org.rut.util.algorithm.support.HeapSort; ]TaN{"
import org.rut.util.algorithm.support.ImprovedMergeSort; 72,rFYvpK
import org.rut.util.algorithm.support.ImprovedQuickSort; EKp@9\XBC
import org.rut.util.algorithm.support.InsertSort; &Ni`e<mP
import org.rut.util.algorithm.support.MergeSort; @UdfAyL
import org.rut.util.algorithm.support.QuickSort; lqb/eN9(t
import org.rut.util.algorithm.support.SelectionSort; sUYxT>R
import org.rut.util.algorithm.support.ShellSort; ,<2DLp%%D
1J'3g
/** "al`$%(
* @author treeroot )7:J[0ZiQ
* @since 2006-2-2 o`.R!wm:W
* @version 1.0 6_4D9 W
*/ <`0h|m'U
public class SortUtil { i9=&;_z
public final static int INSERT = 1; $O^v]>h
public final static int BUBBLE = 2; X*L;.@xA
public final static int SELECTION = 3; & =/
public final static int SHELL = 4; ti &J
public final static int QUICK = 5; 8?FbtBAn
public final static int IMPROVED_QUICK = 6; vaon{2/I
public final static int MERGE = 7; W}|'#nR
public final static int IMPROVED_MERGE = 8; tbO H#|
public final static int HEAP = 9; [7YPl9
IMk'#)
public static void sort(int[] data) { ,[A'tUl _
sort(data, IMPROVED_QUICK); CwX Z
} ]#.]/f >-
private static String[] name={ R CkaJ3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" d9n?v)<v
}; b<]n%Q'n
*~/OOH$"
private static Sort[] impl=new Sort[]{ hTbI -u7BF
new InsertSort(), !'Q -yoHKD
new BubbleSort(), ?,yj")+
new SelectionSort(), .Udj@{
new ShellSort(), VS&TA>
new QuickSort(), b^[F""!e
new ImprovedQuickSort(), Iz[@^IUx=
new MergeSort(), jM:Y'l]
new ImprovedMergeSort(), mYU9 trHV
new HeapSort() g&n)fF
}; FaBqj1O1
X<R?uI?L
public static String toString(int algorithm){ jVH|uX"M5Y
return name[algorithm-1]; [V 8{b{
} Nl')l"
"}Me}S<
public static void sort(int[] data, int algorithm) { .] `f,^v<c
impl[algorithm-1].sort(data); @JW@-9/
} 4ikdM/
B&N/$=5m
public static interface Sort { C4}*)a
public void sort(int[] data); (|d34DOJ
} ai*f F
i>[_r,-\[
public static void swap(int[] data, int i, int j) { u=YX9Mo!
int temp = data; vF?5].T
data = data[j]; [ 4;Ii
data[j] = temp; qp}Ma8+
} dik9 >*"|o
} ` \A(9u*