[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; nL&[R}@W
} i 9wk)
int i1=l; @(LEuYq}
int i2=mid+1; m}?(c)ST
for(int cur=l;cur<=r;cur++){ .'^Pg
if(i1==mid+1) #Up X
data[cur]=temp[i2++]; ER*Et+>
else if(i2>r) [78^:q-/0
data[cur]=temp[i1++]; 8zk?:?8%{
else if(temp[i1] data[cur]=temp[i1++]; ma(E}s
else \*6Ld%:h$
data[cur]=temp[i2++]; hha^:,
} B]5G"4,
} /l$>W<}@
(uskVK>L
} tu0agSpU
^K n{L
改进后的归并排序: @EzO bE{
Q{+N{/tF
package org.rut.util.algorithm.support; #&ZwQw
V.Ki$0>
import org.rut.util.algorithm.SortUtil; eNw9"X}g
QAmb_:^"d
/** *&lNzz5&
* @author treeroot l|p \8=
* @since 2006-2-2 ;33LuD<h.
* @version 1.0 ;UG]ckV-
*/ 0NMekVi
public class ImprovedMergeSort implements SortUtil.Sort { SN/ e41
1lLL9l{UVw
private static final int THRESHOLD = 10; MC&sM-/
^&6'FE
/* j=~c( B
* (non-Javadoc) c>nXnN
* Y>i?nC%*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j[<}l&
*/ 7BDRA},o
public void sort(int[] data) { z}:|is)?
int[] temp=new int[data.length]; WbW@V_rr
mergeSort(data,temp,0,data.length-1); 8Qt'Y9|
} (( D*kd"
">^O{X\
private void mergeSort(int[] data, int[] temp, int l, int r) { DHlCus=ic
int i, j, k; 0kdPr:B Q0
int mid = (l + r) / 2; |p"E0av
if (l == r) r|>a;nY
return; {Ex*8sU%p%
if ((mid - l) >= THRESHOLD) nR1QS_@{L
mergeSort(data, temp, l, mid); 3A(sT}
else 0+P<1ui
insertSort(data, l, mid - l + 1); {Bb:S"7NX
if ((r - mid) > THRESHOLD) #}Qzu~
mergeSort(data, temp, mid + 1, r); 39(]UO6^;
else P:gN"f6
insertSort(data, mid + 1, r - mid); vS{zLXg
5_MqpCL
for (i = l; i <= mid; i++) { U3f a*D
temp = data; u'BuZF
} ub0uxvz
for (j = 1; j <= r - mid; j++) { 8(EK17rE`
temp[r - j + 1] = data[j + mid]; XJG"Zr9
} Qwm#6{5
int a = temp[l]; 0*F{=X~L
int b = temp[r]; }I1SC7gY
for (i = l, j = r, k = l; k <= r; k++) { 30fsVwE2
if (a < b) { Uz`K#Bz
data[k] = temp[i++]; %ur_DQ
a = temp; Gw5j6
} else { $\ 0d9^)&
data[k] = temp[j--]; m.}Yn,
b = temp[j]; DKG%z~R*
} Rt[zZv
} .%pbKi `
} VQQtxHTC3
lbCTc,xT
/** ;%j1'VI
* @param data !e}LB%zf
* @param l El}."}l&
* @param i dvAvG.;U
*/ 9,4Lb]
private void insertSort(int[] data, int start, int len) { Ie[8Iot?bn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %$)[qa3
} I}#_Jt3R
} #Tjv(O[&
} 19u'{/Y"
} }T}9AQ}|
YMidSfi
堆排序： >0W:snNK
CO`%eL~
package org.rut.util.algorithm.support; {p{TG5rwX
UKBVCAK
import org.rut.util.algorithm.SortUtil; 1q])"l"<
0jlwL
/** 5w\>Whbd
* @author treeroot H WOl79-
* @since 2006-2-2 =,/08Cs
* @version 1.0 N6"b OxJ(
*/ GvL)SVv?
public class HeapSort implements SortUtil.Sort{ FZW)C'j
\a|FhhI
/* (non-Javadoc) (QPfrR=J4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~VRt6C
*/ x*G-?Xza)
public void sort(int[] data) { : "|M
MaxHeap h=new MaxHeap(); { *"I4
h.init(data); \,-t]$9
for(int i=0;i h.remove(); `h>a2
System.arraycopy(h.queue,1,data,0,data.length); lzQmD/i*
} y5d=r]_S:
JF%eC}[d
private static class MaxHeap{ X}~5%B(
gy Jx>i
void init(int[] data){ nhfHY-l}7
this.queue=new int[data.length+1]; :N\j@yJK
for(int i=0;i queue[++size]=data; 6;02_C]\o
fixUp(size); `aj;FrF
} y<Hka'(%
} 3;wAm/Z:Q
dE<}X7J%
private int size=0; l\PDou@5
1@&i ju5
private int[] queue; bbDl?m&bq
5J d7<AO_
public int get() { %SG**7
return queue[1]; jE /pba4R
} F~;G[6}
(]JZ1s|
public void remove() { K3uNR w
SortUtil.swap(queue,1,size--); f^P:eBgpx
fixDown(1); N$8do?
} 82S?@%}#J
file://fixdown mE`OG8
private void fixDown(int k) { {XT3M{`rWL
int j; 9~bl
while ((j = k << 1) <= size) { pzX684
if (j < size %26amp;%26amp; queue[j] j++; i+x$Y)=
if (queue[k]>queue[j]) file://不用交换 O5:?nD
break; f`zH#{u
SortUtil.swap(queue,j,k); *Nv!Kuk
k = j; ^6tcB* #A
} 0q|.]:][Eo
} [I4:R_\
private void fixUp(int k) { >k:BG{$Kae
while (k > 1) { f}jo18z%
int j = k >> 1; 85>WK+=
if (queue[j]>queue[k]) 6`/nA4S4.
break; ikr|P&e#u
SortUtil.swap(queue,j,k); vx:MLmZ.
k = j; L*;XjacI]
} (7C&I-l
} OQ[E-%v1 R
wz!a;]agg
} qTbY'V5A
aNZJs<3;'D
} ']nB_x7
I)wjTTM5
SortUtil： Kd2?9gaw
q+A^JjzT
package org.rut.util.algorithm; oSmv (O
RYU(z;+0p
import org.rut.util.algorithm.support.BubbleSort; ?y.q<F)
import org.rut.util.algorithm.support.HeapSort; Irk@#,{<
import org.rut.util.algorithm.support.ImprovedMergeSort; _{.=zv|3
import org.rut.util.algorithm.support.ImprovedQuickSort; p&B c<+3e
import org.rut.util.algorithm.support.InsertSort; I\NiA>c
import org.rut.util.algorithm.support.MergeSort; 6kW<i,A -
import org.rut.util.algorithm.support.QuickSort; 0_Gi1)
import org.rut.util.algorithm.support.SelectionSort; ZTCzD8
import org.rut.util.algorithm.support.ShellSort; #[.vfG
Gp=X1 F
/** ]dZ8]I<$C
* @author treeroot #+mt}w/
* @since 2006-2-2 6pkZ8Vp:
* @version 1.0 it=4cHT
*/ mL\j^q,Y
public class SortUtil { k+X=8()k
public final static int INSERT = 1; YkRv~bc1]
public final static int BUBBLE = 2; pdcP;.
public final static int SELECTION = 3; r 5!ie!5gE
public final static int SHELL = 4; W)3IS&;P
public final static int QUICK = 5; ]X:{y&g(
public final static int IMPROVED_QUICK = 6; Wa#!O$u
public final static int MERGE = 7; PJC[#>}
public final static int IMPROVED_MERGE = 8; ^i3~i?\,P
public final static int HEAP = 9; 1WGcv O)<
EJ$-
public static void sort(int[] data) { ML6V,V/e
sort(data, IMPROVED_QUICK); DNsDEU
} bM]\mo>z<
private static String[] name={ l_ycYD$ZA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %9z N U
}; iI_ad7,u
\3P.GS{l
private static Sort[] impl=new Sort[]{ {}Y QB'}
new InsertSort(), "=l<%em
new BubbleSort(), cswX?MN
new SelectionSort(), ;p~&G"-C`
new ShellSort(), ~z)diF<
new QuickSort(), pfj%AP:
new ImprovedQuickSort(), LOY+^
new MergeSort(), I!(.tu6u6c
new ImprovedMergeSort(), |*4)G6J@n
new HeapSort() {^TVZdw
}; GO@pwq<
f =H,BQ
public static String toString(int algorithm){ IY@)
return name[algorithm-1]; !!Tk'=t9"3
} PV?XpT
c5_?jKpl
public static void sort(int[] data, int algorithm) { ,BM6s,\
impl[algorithm-1].sort(data); ># FO0R
} i2or/(u`
vkE[Ur>
public static interface Sort { h.Cr;w,2R
public void sort(int[] data); uq;,h46ki
} '</
MpbH!2J
public static void swap(int[] data, int i, int j) { }8E//$J
int temp = data; #4h_(Y
data = data[j]; l6b3i v,
data[j] = temp; vt`hY4
} '>:mEXK}w
} pm<zw-