[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; T<)z2Bi
} M7 !" t
int i1=l; p#2th`M:P1
int i2=mid+1; Z-(HDn
for(int cur=l;cur<=r;cur++){ U2$T}/@
if(i1==mid+1) a~>h'}C>
data[cur]=temp[i2++]; eVXbYv=gJ@
else if(i2>r) idy:Jei}
data[cur]=temp[i1++]; y9)",G!
else if(temp[i1] data[cur]=temp[i1++]; ^ BKr0~4A
else :TI1tJS~*
data[cur]=temp[i2++]; {+Yo&F}n
} 7<D_ h/WV
} y{JkY\g
F}>`3//u
} BYU.ptiJJ
[_n|n"M
改进后的归并排序: G2D<LRWt4
$ cSZX#\
package org.rut.util.algorithm.support; DAW%?(\,
?f..N,s
import org.rut.util.algorithm.SortUtil; Kq$1lPI
%R"Fx$tQ
/** {wI0 =U
* @author treeroot HrGX-6`
* @since 2006-2-2 =Frr#t!(w0
* @version 1.0 X)m2{@v D
*/ {'!~j!1'j
public class ImprovedMergeSort implements SortUtil.Sort { h# 8b#
2|BE{91
private static final int THRESHOLD = 10; -;}Wm[
^ a:F*<D
/* kx[8#+P
* (non-Javadoc) E<dN=#f6
* t ,$)PV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *Y Ox`z!R
*/ WM26-nR
public void sort(int[] data) { A_%w(7o"
int[] temp=new int[data.length]; k1J}9HNYR
mergeSort(data,temp,0,data.length-1); 1 <+^$QL
} =xoTH3/,>
1o%Hn"uG
private void mergeSort(int[] data, int[] temp, int l, int r) { t2iFd?
int i, j, k; nj mE>2
int mid = (l + r) / 2; 7Y/_/t~Y
if (l == r) \m&:J>^
return; r DuG["
if ((mid - l) >= THRESHOLD) Lrq&k40y
mergeSort(data, temp, l, mid); V EzIWNV
else o;fQ,rP%
insertSort(data, l, mid - l + 1); \X!!(Z;6A
if ((r - mid) > THRESHOLD) 0W> ",2|z
mergeSort(data, temp, mid + 1, r); ;q Z2V
else K#jm6Xh?E
insertSort(data, mid + 1, r - mid); )1/O_N6C
6F2}|c
for (i = l; i <= mid; i++) { rQJoaP+\q
temp = data; YC~+r8ME$j
} F/8y p<_r
for (j = 1; j <= r - mid; j++) { 6]VTn-
temp[r - j + 1] = data[j + mid]; iYnt:C
} x>cu<,e$d\
int a = temp[l]; k4v[2y`
int b = temp[r]; ',f[y:v;
for (i = l, j = r, k = l; k <= r; k++) { U|=y&a2Rb
if (a < b) { *"@P2F&
data[k] = temp[i++]; I,D=ixK
a = temp; 'PZJ{8=
} else { Gx m"HC
data[k] = temp[j--]; _N6GV$Q
b = temp[j]; ~&kV
} TUG3#PSnm*
} Mtu8zm
} xQQ6D
0!Yi.'+
/** Xma0k3;-
* @param data 8QU`SoS9
* @param l f4q-wX_1
* @param i Jy9&=Qh
*/ 3I]5DW %-
private void insertSort(int[] data, int start, int len) { ]#`bYh^y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [{YV<kN
} %llG/]q#
} l<5!R;?$
} zC7;Zj*k
} Z\x6
3jeR;N]x
堆排序： 5@Sb[za
b~r ?#2K
package org.rut.util.algorithm.support; 79\ =)m}$Q
V;$lgTs|'
import org.rut.util.algorithm.SortUtil; ?S"xR0 *
&3rh{"^9
/** ?pFHpz
* @author treeroot 52oR^|
* @since 2006-2-2 /Mv'fich(
* @version 1.0 m{~r6@
*/ YV+e];s
public class HeapSort implements SortUtil.Sort{ B6BOy~B0
QFMS]
/* (non-Javadoc) ZEW`?6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K|iNEhuc
*/ rS=6d6@
public void sort(int[] data) { "QMHY\C
MaxHeap h=new MaxHeap(); Epx.0TA=t
h.init(data); t;'__">:q
for(int i=0;i h.remove(); _v-sb(* J
System.arraycopy(h.queue,1,data,0,data.length); jsuQR
} `|gCbs95
GFvOrRlP\
private static class MaxHeap{ BP`UB
yY}`G-)g~*
void init(int[] data){ T6tJwSS4:
this.queue=new int[data.length+1]; bcQ$S;U)
for(int i=0;i queue[++size]=data; U9Sp$$L
fixUp(size); dG1qrh9_-
} Rcu/ @j{O
} T+I|2HYqOj
N7|ctO
private int size=0; 6uDNqq
NS\'o )J
private int[] queue; kM.zX|_
/Z^+K
public int get() { {9(N?\S1`a
return queue[1]; o^Ms(?K%t
} 44!bwXz8
E]bjI$j
public void remove() { 8$1<N
SortUtil.swap(queue,1,size--); ]1X];x&e
fixDown(1); V4|pZ]
} oC[$PPqX#
file://fixdown +?%huJYK,
private void fixDown(int k) { 'C(YUlT2?P
int j; X4jtti
while ((j = k << 1) <= size) { #U^@)g6
if (j < size %26amp;%26amp; queue[j] j++; X"yLo8y8$
if (queue[k]>queue[j]) file://不用交换 dD=dPi#
break; q?`bu:yS
SortUtil.swap(queue,j,k); F*QGzbv)
k = j; zH.7!jeE
} 0 j6/H?OT
} ^X^4R1V)
private void fixUp(int k) { zT.qNtU%
while (k > 1) { U`xjau+
int j = k >> 1; >XBLm`a
if (queue[j]>queue[k]) $cjidBi`):
break; zI&oZH^vn
SortUtil.swap(queue,j,k); Nx~8]h1(
k = j; B&cC;Hw
} *f1MgP*GKF
} b*7OIN5h
4jvgyi9
} O0e6I&u:
SwLul4V
} KATt9ox@
TwY]c<t
SortUtil： 4~D?F'o
d&F8nBIM5
package org.rut.util.algorithm; ~i(X{^,3
~qs97'
import org.rut.util.algorithm.support.BubbleSort; 4\>Cnc{
import org.rut.util.algorithm.support.HeapSort; Q1g@FsW&U
import org.rut.util.algorithm.support.ImprovedMergeSort; M*|x,K=U
import org.rut.util.algorithm.support.ImprovedQuickSort; WJ8i,7
import org.rut.util.algorithm.support.InsertSort; VGkwrS;+I
import org.rut.util.algorithm.support.MergeSort; t=5K#SX}
import org.rut.util.algorithm.support.QuickSort; K^EW*6vB8O
import org.rut.util.algorithm.support.SelectionSort; Ao(Xz$cQfW
import org.rut.util.algorithm.support.ShellSort; YHl6M&*@
IF<pT)
/** awGI|d
* @author treeroot (z\@T`6`
* @since 2006-2-2 }PD?x4
* @version 1.0 h>9GfF3
*/ }5\F<b^@Y
public class SortUtil { (z#qkKL{^
public final static int INSERT = 1; y^?7de}
public final static int BUBBLE = 2; Z%k)'%_
public final static int SELECTION = 3; )bXiw3'A
public final static int SHELL = 4; fQM:NI?9?
public final static int QUICK = 5; '`I&g8I\
public final static int IMPROVED_QUICK = 6; x8w455
public final static int MERGE = 7; CM_FF:<tn
public final static int IMPROVED_MERGE = 8; ;mu^WIj
public final static int HEAP = 9; 5$/ED3mcK
,,OO2EgZ`
public static void sort(int[] data) { pri=;I(2A
sort(data, IMPROVED_QUICK); 4u0=/pfi[
} gh#9<
private static String[] name={ xx_]e4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g?qm >X
}; 1ve %xF
HTAJn_
private static Sort[] impl=new Sort[]{ e<#t]V
new InsertSort(), 9 "7(Jq
new BubbleSort(), `{#0C-
new SelectionSort(), zuwlVn
new ShellSort(), F|Pf-.r`t
new QuickSort(), akoK4!z
new ImprovedQuickSort(), +iY.YV
new MergeSort(), R.-2shOE'
new ImprovedMergeSort(), @lRTp
new HeapSort() 9ePG-=5I
}; %We~k'2f
cia'h_w
public static String toString(int algorithm){ 9Ra*bP ]1
return name[algorithm-1]; nep0<&"
} YBehyx2eK
E<y0;l?H<
public static void sort(int[] data, int algorithm) { kaqH.e(
impl[algorithm-1].sort(data); .5Sw
} tNj-~r
mII7p LbQ
public static interface Sort { ..'k+0u^
public void sort(int[] data); cks53/Z
} rl"$6{Z}
ya.!zGH
public static void swap(int[] data, int i, int j) { *mwHuGbZed
int temp = data; d e)7_pCF|
data = data[j]; K Rs e
data[j] = temp; 4>x]v!d
} hH_&42E6
} >$Sc}a3