[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; I*Q^$YnM
} ;Xw'WMb*=
int i1=l; }bxW@(bs
int i2=mid+1; hS}d vZa
for(int cur=l;cur<=r;cur++){ }(/")i4h
if(i1==mid+1) N=QeeAI}}m
data[cur]=temp[i2++]; ?zD?-
else if(i2>r) g5 J[ut
data[cur]=temp[i1++]; D~i m1h;>
else if(temp[i1] data[cur]=temp[i1++]; (A\p5@ht
else nf7l}^/UE
data[cur]=temp[i2++]; dDAIfe2y
} 'F- wC!
} u&!QP4$"z
v&NC` dVR
} Gqz<;y
,(6U3W*bu
改进后的归并排序: wK_I"
%6vf~oG
package org.rut.util.algorithm.support; 8d90B9
*P#okwp
import org.rut.util.algorithm.SortUtil; i+2fWi6Z+
19u'{/Y"
/** {q[l4_
* @author treeroot }CiB+
* @since 2006-2-2 us2X:X)
* @version 1.0 )L*6xTa~
*/ kXmnLxhS/
public class ImprovedMergeSort implements SortUtil.Sort { *<PQp
G/2| *H
private static final int THRESHOLD = 10; 3=reN6Q
5w\>Whbd
/* rHir> p
* (non-Javadoc) XQW+6LEQ
* &:i|;^^2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J;K-Pv+
*/ GvL)SVv?
public void sort(int[] data) { FZW)C'j
int[] temp=new int[data.length]; )}-,4Iu%
mergeSort(data,temp,0,data.length-1); BrdHTk= Vy
} 8b0!eB#_Ee
s)=fs#%
private void mergeSort(int[] data, int[] temp, int l, int r) { G d".zsn
int i, j, k; 'w?*4H
int mid = (l + r) / 2; Q -!,yCu
if (l == r) 9aED6
return; tFY;q##z
if ((mid - l) >= THRESHOLD) Mpfdl65
mergeSort(data, temp, l, mid); QJL%J
else -'j_JJ
insertSort(data, l, mid - l + 1); g:l5,j.K
if ((r - mid) > THRESHOLD) {9tKq--@E9
mergeSort(data, temp, mid + 1, r); `CWI%V
else Op&i6V}<s
insertSort(data, mid + 1, r - mid); gEVN;G'B<=
{bxTODt@
for (i = l; i <= mid; i++) { wj-=#gyAoo
temp = data; )T-C/ 3
} _vQtV]
for (j = 1; j <= r - mid; j++) { 7QXA*.' F
temp[r - j + 1] = data[j + mid]; u!=9.3
} VJK?"mX
int a = temp[l]; K3uNR w
int b = temp[r]; %h)6o99{wF
for (i = l, j = r, k = l; k <= r; k++) { <oweLRt
if (a < b) { C #A sA
data[k] = temp[i++]; ~uF%*
a = temp; ,_STt)
} else { {XT3M{`rWL
data[k] = temp[j--]; &n_aMZ;
b = temp[j]; ?;s}GpEY:
} njbEw4nX
} hJrcy!P<a
} B0_[bQoc1
Ck71N3~W
/** s*"Yi~
* @param data O~E6"vQ
* @param l [D8u.8q
* @param i {u3eel
*/ lzJ[`i.
private void insertSort(int[] data, int start, int len) { "pP5;*^f
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V-#OiMWa~
} AqPE.mf
} T7vSp<i/
} YL(7l|^!
} 85>WK+=
i%1ny`Q
堆排序： AOT +4*)%
+(v<_#wR-
package org.rut.util.algorithm.support; _/@VV5Mq
F\' ^DtB
import org.rut.util.algorithm.SortUtil; N!7r~B
.AEOf0t
/** ZG=B'4W
* @author treeroot 'S_kD! BO
* @since 2006-2-2 wz!a;]agg
* @version 1.0 ^tWt"GgC
*/ -8sm^A>C
public class HeapSort implements SortUtil.Sort{ K+3dwQo
>C6wm^bl
/* (non-Javadoc) 0FA N9u2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $D`~X`
*/ (&n4^tJ+_
public void sort(int[] data) { ls5s}X
MaxHeap h=new MaxHeap(); L0v& m
h.init(data); \,:3bY_d
for(int i=0;i h.remove(); ^%)H;
System.arraycopy(h.queue,1,data,0,data.length); r?{$k3Vl
} 3Uzb]D~u
4)'8fi
private static class MaxHeap{ 2_^{Vez@I
SfKm]Z>Hp
void init(int[] data){ d>ltL`xn
this.queue=new int[data.length+1]; %9|}H [x
for(int i=0;i queue[++size]=data; p&B c<+3e
fixUp(size); jft%\sY
} a&>Tk%
} q3+G
2k\i/i/Y
private int size=0; 3j{VpacZY
]1A"l!yf
private int[] queue; 'b#`)w@/=
6`sOhVD
public int get() { K<@gU\-!
return queue[1]; #St=%!
} ;aZ$qgN*Y
,@+7(W
public void remove() { MQL1/>j;
SortUtil.swap(queue,1,size--); ,2Y PD4
fixDown(1); fz%I'+!
} E)eRi"a46
file://fixdown %bM^/7
private void fixDown(int k) { rlj @'
int j; ;]ojfR=?%
while ((j = k << 1) <= size) { "=cWcztiP
if (j < size %26amp;%26amp; queue[j] j++; Yg 8AMi
if (queue[k]>queue[j]) file://不用交换 2ckAJcpEb/
break; d/Q}I[J.u
SortUtil.swap(queue,j,k); kF:4[d
k = j; Wa#!O$u
} Qr`WPTQr"
} VE4Z;Dr"
private void fixUp(int k) { ,|gX?[o
while (k > 1) { /O"IA4O
int j = k >> 1; vn n4
if (queue[j]>queue[k]) _xgF?#
break; ML6V,V/e
SortUtil.swap(queue,j,k); i^c
k = j; !olvP*c"
} 7X3<8:%
} N3P!<J/tc
[4)q6N5`f
} gTz66a@i
&!I^m
} xkv2#"*v
wJ_E\vP
SortUtil： Fs^d-I
\;0J6LBc
package org.rut.util.algorithm; ?Ji.bnfK
I(6k.PQ
import org.rut.util.algorithm.support.BubbleSort; !FhK<#
import org.rut.util.algorithm.support.HeapSort; Cm:&n|
import org.rut.util.algorithm.support.ImprovedMergeSort; lO482l_t
import org.rut.util.algorithm.support.ImprovedQuickSort; p5<2tSD
import org.rut.util.algorithm.support.InsertSort; (2He]M\
import org.rut.util.algorithm.support.MergeSort; fH_G;#q
import org.rut.util.algorithm.support.QuickSort; xPa>-N=*
import org.rut.util.algorithm.support.SelectionSort; JpVV0x/Q/_
import org.rut.util.algorithm.support.ShellSort; 2ql7*g?Uq@
+PC<#
/** K&(}5`H0=
* @author treeroot 4:$?u}9[:[
* @since 2006-2-2 :3qA7D}
* @version 1.0 &1hJ?uM01
*/ ]=A=VH&
public class SortUtil { NB]T~_?]*
public final static int INSERT = 1; ^%X,Rml<e
public final static int BUBBLE = 2; RX",Zt$q
public final static int SELECTION = 3; 6d~[My
public final static int SHELL = 4; /1X0h
public final static int QUICK = 5; i2or/(u`
public final static int IMPROVED_QUICK = 6; ]?P9M<0PM
public final static int MERGE = 7; x)6yWr[ri%
public final static int IMPROVED_MERGE = 8; te?R(&
public final static int HEAP = 9; 6&(gp(F
M[5zn
public static void sort(int[] data) { rvT75dV0
sort(data, IMPROVED_QUICK); MpbH!2J
} .pNPC|XU
private static String[] name={ iE}jilU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S[fzy$">
}; {e,m<mAi
hw`+,_ g
private static Sort[] impl=new Sort[]{ 6x\+j
new InsertSort(), x{u7#s1|/
new BubbleSort(), pm<zw-
new SelectionSort(), {r2-^QHF
new ShellSort(), YQ>P{I%J
new QuickSort(), ~8'4/wh+8
new ImprovedQuickSort(), K~nk:}3Ui
new MergeSort(), 7&G[mOx0
new ImprovedMergeSort(), bK `'zi
new HeapSort() c1j)
}; /ZAS%_as
-Z&6PT7
public static String toString(int algorithm){ Gy36{*
return name[algorithm-1]; t0Q/vp*/
} ~ei\~;n\@
x1)G!i
public static void sort(int[] data, int algorithm) { O`e0r%SJ
impl[algorithm-1].sort(data); DJ"O`qNV3
} t?^C9(;6
>'#G$f
public static interface Sort { $rf4h]&<
public void sort(int[] data); dbGW`_zQ4
} ]E90q/s@c
84[T!cDk
public static void swap(int[] data, int i, int j) { X&._<2
int temp = data; LPbZ.
data = data[j]; (j-[m\wF
data[j] = temp; L{$ZL&
} C)> ])'S
} gBRhO^Sz