[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; ,is3&9
} =O5pY9UO
int i1=l; TrEu'yxy8*
int i2=mid+1; kTOzSiq
for(int cur=l;cur<=r;cur++){ lZ]ZDb?P
if(i1==mid+1) y51e%n$
data[cur]=temp[i2++]; NJWA3zz
else if(i2>r) DEKP5?]
data[cur]=temp[i1++]; Z>k#n'm^z
else if(temp[i1] data[cur]=temp[i1++]; $9_xGfx}
else $r@zs'N
data[cur]=temp[i2++]; 6]WAUK%h
} 98IJu
} h+g_rvIG*
84& $^lNV
} spH7 /5}
61C7.EZZ;
改进后的归并排序: 4DI8s4fi
P~>OS5^
package org.rut.util.algorithm.support; H)kwQRfu
#wwH m3
import org.rut.util.algorithm.SortUtil; |6sp/38#p
_)3|f<E_t)
/** 823Y\x~>
* @author treeroot Q4#m\KK;i9
* @since 2006-2-2 U)]oO
* @version 1.0 /K@XzwM
*/ J?"B%B5c
public class ImprovedMergeSort implements SortUtil.Sort { {4<C_52t
N2^=E1|_
private static final int THRESHOLD = 10; !C':
MzdV2.
/* _^Ubs>d=*
* (non-Javadoc) 99e.n0
* /$Nsd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V1N3iI
*/ 5IGX5x
public void sort(int[] data) { 24 'J
int[] temp=new int[data.length]; [.7d<oY
mergeSort(data,temp,0,data.length-1); xX&+WR
} _$E6P^AQ
\h/H#jZJ
private void mergeSort(int[] data, int[] temp, int l, int r) { i#n0U/
int i, j, k; y@S$^jk.
int mid = (l + r) / 2; r,73C/*&/
if (l == r) RLjc&WhzXu
return; *SJ_z(CZm
if ((mid - l) >= THRESHOLD) {#vgtgBB
mergeSort(data, temp, l, mid); C_}]`[
else UmP/h@8
insertSort(data, l, mid - l + 1); @1roe G
if ((r - mid) > THRESHOLD) _aSxc)?
mergeSort(data, temp, mid + 1, r); K<3A1'_
else X]TG<r
insertSort(data, mid + 1, r - mid); )hsgC'H{~]
Ko<:Z)PS
for (i = l; i <= mid; i++) { w3ResQ
temp = data; 2~)`N>@
} D0-3eV-
for (j = 1; j <= r - mid; j++) { z#wkiCRYm
temp[r - j + 1] = data[j + mid]; T4Uev*A
} <44G]eb
int a = temp[l]; hD 82tr
int b = temp[r]; e8a+2.!&\
for (i = l, j = r, k = l; k <= r; k++) { vH@ds k
if (a < b) { pI\]6U
data[k] = temp[i++]; 0 1rK8jX
a = temp; &jJL"gq"
} else { Naf0)3q>!
data[k] = temp[j--]; AO4U}?
b = temp[j]; 9s q
} _1\v
} L~OvY
} m=:9+z
?dg[:1R}
/** m+[Ux{$
* @param data 194)QeoFw
* @param l F@KGj|
* @param i rglXs
*/ U?Zq6_M&
private void insertSort(int[] data, int start, int len) { \!ZTL1b8t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1.GQau~
} -GrE}L
} g]H<}4lgq"
} *i%.;Z"
} zwjgE6
A?P_DA
堆排序： .t!x<B
hMO=#up&
package org.rut.util.algorithm.support; \~$#1D1f
[RhO$c$[\
import org.rut.util.algorithm.SortUtil; YjKxb9
{4Cmu;u
/** qo bc<-
* @author treeroot k?^z;Tlvw
* @since 2006-2-2 q>+k@>bk@
* @version 1.0 aX'*pK/-
*/ `Ggbi4),
public class HeapSort implements SortUtil.Sort{ 3F2w-+L
?CPahU
/* (non-Javadoc) BW4J>{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) on`3&0,.
*/ ?Z/V~,
public void sort(int[] data) { xi}skA
MaxHeap h=new MaxHeap(); /y}xX
h.init(data); G_,jgg7
for(int i=0;i h.remove(); )jP1or
System.arraycopy(h.queue,1,data,0,data.length); W/h[A3 `3N
} ^<2p~h0 \
p<"m[Dt]
private static class MaxHeap{ A3/k@S-R2
8{sGNCvU
void init(int[] data){ D'Q\za
this.queue=new int[data.length+1]; UP,c|
for(int i=0;i queue[++size]=data; XXa|BZ1RX
fixUp(size); 37o;;
} 1=V-V<
} L4nYXW0y
pW3^X=6
private int size=0; *$g-:ILRuZ
$>LQ6|XRu
private int[] queue; k{-Cwo
4.t-i5
public int get() { ]c'A%:f<
return queue[1]; H4+i.*T#
} _oeS Uzq.
oOFVb5qoFU
public void remove() { Cw&KVw*
SortUtil.swap(queue,1,size--); =dN@Sa/
fixDown(1); a\*yZlXKs
} 6Z"X}L,*
file://fixdown Z,PPu&lmE/
private void fixDown(int k) { VI*$em O0
int j; Z *x'+X
while ((j = k << 1) <= size) { u>vL/nI
if (j < size %26amp;%26amp; queue[j] j++; 3u0RKLc\
if (queue[k]>queue[j]) file://不用交换 3!_XEN[
break; f3y=Wxk[
SortUtil.swap(queue,j,k); G18b$z
k = j; |2A:eI8 ^
} ZbKg~jdF
} KMax$
private void fixUp(int k) { 0w7DsPdS
while (k > 1) { d&>^&>?$zh
int j = k >> 1; xyXa .
if (queue[j]>queue[k]) MF'JeM;H
break; m9;SrCN_
SortUtil.swap(queue,j,k); "#g}ve,
k = j; n `Ac 3A
} ))Za&S*<
} ;$Jo+#
{oL>1h,%3?
} Dw"\/p:-3
Nz-&MS
} h{qgEIk&
eyxW 0}[
SortUtil： |w3M7;~eF
/x *3}oI
package org.rut.util.algorithm; [V`r^
-Lg Ei3m
import org.rut.util.algorithm.support.BubbleSort; 4skD(au8
import org.rut.util.algorithm.support.HeapSort; yf,z$CR
import org.rut.util.algorithm.support.ImprovedMergeSort; e|r`/:M
import org.rut.util.algorithm.support.ImprovedQuickSort; x?<FJ"8"k
import org.rut.util.algorithm.support.InsertSort; MHwIA*R
import org.rut.util.algorithm.support.MergeSort; A@u@ift
import org.rut.util.algorithm.support.QuickSort; N$tGQ@
import org.rut.util.algorithm.support.SelectionSort; ~V6D<
import org.rut.util.algorithm.support.ShellSort; NxILRKwO
0"SU_jQzv
/** Iga024KR
* @author treeroot \b>]8Un"
* @since 2006-2-2 U$UIN#
* @version 1.0 ?q [T
*/ y1#1Ne_
public class SortUtil { L"aeG
public final static int INSERT = 1; \{D" !e
public final static int BUBBLE = 2; 7j{?aza
public final static int SELECTION = 3; ),!qTjD
public final static int SHELL = 4; B-mowmJ3dg
public final static int QUICK = 5; )U#K
public final static int IMPROVED_QUICK = 6; ugBCBr
public final static int MERGE = 7; % AgUUn&k
public final static int IMPROVED_MERGE = 8; 'N(R_q6MW
public final static int HEAP = 9; {4PwLCy
GA.8@3
public static void sort(int[] data) { z(~_AN M4,
sort(data, IMPROVED_QUICK); u1.BN>G
} ~>XxGjxe
private static String[] name={ H,NF;QPPC
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ji="DYtL
}; R@2X3s:
C_Wc5{
private static Sort[] impl=new Sort[]{ '<uq3?5
new InsertSort(), !`r$"}g
new BubbleSort(), v` r:=K
new SelectionSort(), FGkVqZ Y2?
new ShellSort(), e#q}F>/L
new QuickSort(), y_[vr:s5pG
new ImprovedQuickSort(), +H2Qk4XFB
new MergeSort(), E(|>Ddv B&
new ImprovedMergeSort(), "Yy n/
new HeapSort() t`QENXA}
}; Bbp|!+KP{(
TsZ@
public static String toString(int algorithm){ i@'dH3-kO
return name[algorithm-1]; S]{oPc[7
} K> e7pu
;n},"&
public static void sort(int[] data, int algorithm) { sR8"3b<qA
impl[algorithm-1].sort(data); 3gf1ownC
} g\AY|;T
M3Kfd
public static interface Sort { b`_Q8 J
public void sort(int[] data); j+YJbL v
} ,z?':TZ
A2Tw<&Tw(
public static void swap(int[] data, int i, int j) { hv+zGID7
int temp = data; -F>jIgeC2v
data = data[j]; I}Q2Vu<
data[j] = temp; T9&1VW
} y?# Loe
} g,Y/M3>(