[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; W>nb9Isp
} <BA&S _=4
int i1=l; "uC*B4`
int i2=mid+1; K7VG\Ec
for(int cur=l;cur<=r;cur++){ jdf@lb=5l
if(i1==mid+1) Z!eq/
data[cur]=temp[i2++]; cN>i3}fq
else if(i2>r) =Q/>g6
data[cur]=temp[i1++]; I*2rS_i[T
else if(temp[i1] data[cur]=temp[i1++]; #L$ I%L"
else xB+H7Ya
data[cur]=temp[i2++]; [wG%@0\
} XOU$3+8q5
} ]w_)Spo.
=lD]sk
} 34:EpZO@
fMaNv6(
改进后的归并排序: NyLnE
BAHx7x#(
package org.rut.util.algorithm.support; y]9UFL"
c`; LF'!
import org.rut.util.algorithm.SortUtil; d vxEXy
wCmv/m
/** jtY~-@*
* @author treeroot :L0W"$
* @since 2006-2-2 -=IM8Dny
* @version 1.0 [1GEe
*/ @NE#P&f
public class ImprovedMergeSort implements SortUtil.Sort { b\S}?{m5
~Xw?>&
private static final int THRESHOLD = 10; D|:sSld @
:/qO*&i,N
/* 9#6/c
* (non-Javadoc) #Q7$I.O]
* V5r7eC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6Qu*'
*/ FM[To
public void sort(int[] data) { >#|Yoc
int[] temp=new int[data.length]; vDvGT<d
mergeSort(data,temp,0,data.length-1); ^W'[l al.
} o |iLBh$)
3>Snd9Q
private void mergeSort(int[] data, int[] temp, int l, int r) { ;~1JbP
int i, j, k; w'XgW0j{
int mid = (l + r) / 2; efR$s{n!
if (l == r) n#cN[C9
return; qT @IY)e
if ((mid - l) >= THRESHOLD) f tDV3If
mergeSort(data, temp, l, mid); q:^Cw8
else >IjLFM+U
insertSort(data, l, mid - l + 1); <LN$[&f#
if ((r - mid) > THRESHOLD) q04Dj-2<
mergeSort(data, temp, mid + 1, r); |9eY R
else 2A+,. S_!x
insertSort(data, mid + 1, r - mid); ,eCXT=6
@D=`iG%
for (i = l; i <= mid; i++) { 7d)' y
temp = data; eUlb6{!y?
} W<o0Z OO
for (j = 1; j <= r - mid; j++) { W|U1AXU7/
temp[r - j + 1] = data[j + mid]; edx'p`%d5
} n`xh/vGm#
int a = temp[l]; E2D8s=r
int b = temp[r]; qw1J{xoHW
for (i = l, j = r, k = l; k <= r; k++) { AAgA]OD,
if (a < b) { >oDP(]YGg
data[k] = temp[i++]; UULL:vqq
a = temp; \ 6a
} else { 9YhsJ~"Q
data[k] = temp[j--]; 8$Yf#;m[
b = temp[j]; 9zd/5|W
} D[M?27
} Iq\oB
} >~~\==".
mM>|fHGA
/** 4V8wB}y7e
* @param data pr(\?\a
* @param l taaAwTtk?A
* @param i )n@3@NV
*/ :X*LlN
private void insertSort(int[] data, int start, int len) { Ms)zEy>[Ql
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); TVwYFX
} "s9gQAoaO
} V}+;bbUc-
} Y'1V(5/&
} yG$@!*|
?Nql7F4
堆排序： FoCkTp+/
%$| k3[4V
package org.rut.util.algorithm.support; ZRGZ'+hw
7!wnx.
import org.rut.util.algorithm.SortUtil; 8Oh3iO
I3Xh[% -!
/** v"~I( kf$
* @author treeroot XtdLKYET
* @since 2006-2-2 S]O Hv6
* @version 1.0 ,>v9 Y#U
*/ %[m1\h"1
public class HeapSort implements SortUtil.Sort{ o1+]6s+j}
,6\f4/
/* (non-Javadoc) Z]\^.x9S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $uynW3h
*/ u6T?oK9j
public void sort(int[] data) { % 6.jh#C
MaxHeap h=new MaxHeap(); U-<"i6mg?
h.init(data); !5!$h`g
for(int i=0;i h.remove(); rxeXz<
System.arraycopy(h.queue,1,data,0,data.length); [d>yo_iB
} ~')t1Ays
\zL7j4
private static class MaxHeap{ Gi4dgMVei
yt:V+qdv
void init(int[] data){ ,s&~U<Z
this.queue=new int[data.length+1]; q.km>XRk~
for(int i=0;i queue[++size]=data; _O9H._E
fixUp(size); Y_hRL&u3W
} ld:alEo
} ~ O=|v/]
)^f Q@C8
private int size=0; R9G)X]
9yw/-nA
private int[] queue; pu*u[n
WVK-dBU
public int get() { l{m~d!w`a
return queue[1]; MPy][^s!
} E9 q;>)}
D#}Yx]Q1
public void remove() { Am0C|(#Xm
SortUtil.swap(queue,1,size--); q*TKs#3
fixDown(1); g_c)Ts(
} bv>lm56
file://fixdown jZ,[{Z(N
private void fixDown(int k) { ~U6YN_W
int j; \[I .
while ((j = k << 1) <= size) { $=xQX
if (j < size %26amp;%26amp; queue[j] j++; ~<OjXuYu
if (queue[k]>queue[j]) file://不用交换 y]f^`2L!8>
break; fYM6wYJ
SortUtil.swap(queue,j,k); (H%d]
k = j; CVG>[~}(9'
} EFt`<qwj
} <`UG#6z8
private void fixUp(int k) { rtmt3
while (k > 1) { 15o *r
int j = k >> 1; ,Ysl$^\
if (queue[j]>queue[k]) ,T*_mDVY
break; L^{;jgd&T9
SortUtil.swap(queue,j,k); $_zkq@
k = j; m&0BbyE.z
} G_N-}J>EP
} 1za'u_
~.9o{?pbG
} HmB[oH"x
*@n3>$
} iZ6C8HK&&
s_Oh >y?Aq
SortUtil： ;Pqyu ?
f"<@6Axq
package org.rut.util.algorithm; 7h#faOP
7e{X$'
import org.rut.util.algorithm.support.BubbleSort; SA+%c)j29
import org.rut.util.algorithm.support.HeapSort; 3kqV_Pjg
import org.rut.util.algorithm.support.ImprovedMergeSort; qTh='~m4[
import org.rut.util.algorithm.support.ImprovedQuickSort; pkN:D+gS
import org.rut.util.algorithm.support.InsertSort; :`u&TXsu
import org.rut.util.algorithm.support.MergeSort; K[>@'P}y
import org.rut.util.algorithm.support.QuickSort; UtBlP+bE?y
import org.rut.util.algorithm.support.SelectionSort; i,Wm{+H-O
import org.rut.util.algorithm.support.ShellSort; 3s_k>cO=
0Q- Mxcj
/** ENx@Ex
* @author treeroot f,HzrHax
* @since 2006-2-2 io r [v
* @version 1.0 H@2"ove-uC
*/ j_'rhEdLP
public class SortUtil { @f5@0A\0
public final static int INSERT = 1; Lr?4Y
public final static int BUBBLE = 2; t-7[Mk9@
public final static int SELECTION = 3; eMl]td rI
public final static int SHELL = 4; ^c0$pqZ}r
public final static int QUICK = 5; y.*=Ww+
public final static int IMPROVED_QUICK = 6; cv*Q]F1%
public final static int MERGE = 7; jFNs=D&(
public final static int IMPROVED_MERGE = 8; '0_j{ig
public final static int HEAP = 9; -Mi}yi
*iRm`)zC(
public static void sort(int[] data) { j #I:6yA3
sort(data, IMPROVED_QUICK); ?%xhe
} teOBsFy/I
private static String[] name={ }L$Xb2^l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0fPHh>u
}; `f6)Q`n
$v'Y:
private static Sort[] impl=new Sort[]{ Ueg N-n
new InsertSort(), JXLWRe
new BubbleSort(), Y( $Ji12
new SelectionSort(), @"{'j
new ShellSort(), 5h|m4)$
new QuickSort(), U.hERe~X
new ImprovedQuickSort(), yXTK(<'
new MergeSort(), -q&7J' N
new ImprovedMergeSort(), "0H56#eW
new HeapSort() oWx_O-_._
}; ~C"k$;(n
N$,/Q9h^
public static String toString(int algorithm){ ;N$0)2w
return name[algorithm-1]; &8Jg9#
} 9o`7Kc/g
Hw?2XDv j
public static void sort(int[] data, int algorithm) { ;naq-%'Sg
impl[algorithm-1].sort(data); NlF0\+h
} rWFcIh5
{7=WU4$
public static interface Sort { 'ybth
public void sort(int[] data); Y%fVt|
} 1qLl^DW
~3'RW0
public static void swap(int[] data, int i, int j) { z#{0;t
int temp = data; $h 08Z
data = data[j]; Gin_E&%g
data[j] = temp; q[)q|R|
} ]|,q|c,
} 5PGlR!^