[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; Pu}PE-b
} 7'7o^> !
int i1=l; }<q=Zq+
int i2=mid+1; lWFm>DiLY
for(int cur=l;cur<=r;cur++){ 3V/f-l]X/
if(i1==mid+1) ^t[br6G
data[cur]=temp[i2++]; 2\#~%D>[
else if(i2>r) 5 HN,y
data[cur]=temp[i1++]; T'7x,8&2|
else if(temp[i1] data[cur]=temp[i1++]; R7Ns5s3X
else N8Un42
data[cur]=temp[i2++]; `nL^]i
} S/6I9zOP
} XRn+6fn|
a61?G!]
} R/&C}6Gn
}S9uh-j6l
改进后的归并排序: zU# OjvNk
KvEZbf3f
package org.rut.util.algorithm.support; Ifj%"RI
t`0(5v
import org.rut.util.algorithm.SortUtil; ^ |>)H
wtQ(R4
/** R[2h!.O8
* @author treeroot `4"&_ltD
* @since 2006-2-2 d-"[-+)-
* @version 1.0 y9Q"3LLic`
*/ Rp.FG
public class ImprovedMergeSort implements SortUtil.Sort { F:-6Htmj
;W!hl<``d*
private static final int THRESHOLD = 10; !Op18hP$
gC/-7/}
/* fG /wU$B
* (non-Javadoc) eS"sd^;R
* Ay\!ohIS3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Mp^U)S+
*/ nHB`<B
public void sort(int[] data) { #J4,mFMr
int[] temp=new int[data.length]; "#`c\JuR]
mergeSort(data,temp,0,data.length-1); }q~xr3#
} MP`WU}2
}u~r.=
private void mergeSort(int[] data, int[] temp, int l, int r) { y{\(|j
int i, j, k; }{e7wqS$&,
int mid = (l + r) / 2; +isaqfy/
if (l == r) ]TKM.[[
return; kN$L8U8f
if ((mid - l) >= THRESHOLD) H@8 ;6D
mergeSort(data, temp, l, mid); o#F03
else 2@f E!
insertSort(data, l, mid - l + 1); 3WF6bJN
if ((r - mid) > THRESHOLD) Q"H1(kG|
mergeSort(data, temp, mid + 1, r); |p+ xM
else W$Zc;KRz$0
insertSort(data, mid + 1, r - mid); LL=nMoS
Jx= v6==7
for (i = l; i <= mid; i++) { h2edA#bub
temp = data; o8S)8_3
} 610hw376B
for (j = 1; j <= r - mid; j++) { oNBYJ]t
temp[r - j + 1] = data[j + mid]; g/m%A2M&aH
} ,h$j%->U
int a = temp[l]; 3mM.#2=@>
int b = temp[r]; atWAhN
for (i = l, j = r, k = l; k <= r; k++) { dDla?)F
if (a < b) { w~=@+U$f
data[k] = temp[i++]; t2vo;,^euL
a = temp; Ic&Jhw;]z
} else { #-u?+Nk/
data[k] = temp[j--]; S#, E)h/
b = temp[j]; f<G:}I
} =9vmRh?8
} ~0@+8%^>;
} T1r^.;I:
Fh$Xcz~i
/** ^!>o5Y)
* @param data kT6EHuB
* @param l })}-K7v1+
* @param i WD5ulm?91|
*/ TJp0^&Q
private void insertSort(int[] data, int start, int len) { :j0r~*z-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *S4*FH;8
} {pNf&'
} 9}6^5f?|
} 2*1s(Jro
} G#A& Y$
B%Spmx8
堆排序： K%"cVqb2V
0UT2sM$
package org.rut.util.algorithm.support; y:8*!}fR
.J3Dk=/
import org.rut.util.algorithm.SortUtil; a<K@rgQ
Px))O&w{
/** A">A@`}
* @author treeroot -!]dU`:(X
* @since 2006-2-2 nY<hfqof
* @version 1.0 r-a/vx#
*/ .v:K`y;f\(
public class HeapSort implements SortUtil.Sort{ N;6WfdA-
sx0:g?F3j
/* (non-Javadoc) 4!dN^;Cb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1(**JTe
*/ +}@HtjM
public void sort(int[] data) { VJeN m3WNb
MaxHeap h=new MaxHeap(); Y+tXWN"8
h.init(data); =NzA2td
for(int i=0;i h.remove(); m,U`hPJ
System.arraycopy(h.queue,1,data,0,data.length); @"#W\m8
} 6"W~%FSJX
43Yav+G(+
private static class MaxHeap{ 'L2M W
}$ Am;%?p
void init(int[] data){ 6Hn3
this.queue=new int[data.length+1]; !%?X% @9
for(int i=0;i queue[++size]=data; WeTsva+
fixUp(size); -)tu$W*
} r='"X#CmV/
} dZ7+Iw;m
pU*dE
private int size=0; ,]'?Gd
ZAPT5
private int[] queue; Hs+VA$$*
"oYyeT ,?
public int get() { [a*m9F\ ,
return queue[1]; cFoDR
} ^V~rS8]gj
?1('s0s\,
public void remove() { <Dw`Ur^X5
SortUtil.swap(queue,1,size--); !RnO{FL
fixDown(1); p_jDnb#
} !ldb_*)h
file://fixdown 451r!U1Z
private void fixDown(int k) { 4l$(#NB<
int j; J..>ApX
while ((j = k << 1) <= size) { u5EHzoq
if (j < size %26amp;%26amp; queue[j] j++; 2Ek6YNx
if (queue[k]>queue[j]) file://不用交换 ?s("@dz_
break; v3+\Aq
SortUtil.swap(queue,j,k); <m80e),~
k = j; _n(NPFV
} }xHoitOD
} H\2+cAFN#
private void fixUp(int k) { %zs 1v]
while (k > 1) { ` =!&9o
int j = k >> 1; z$E+xZ
if (queue[j]>queue[k]) pI |;
break; ]}cai1
SortUtil.swap(queue,j,k); })|+tZ
k = j; d9[*&[2J|
} n}qHt0N
} KD^>Vv#
]+W+8)f1M
} !p1OBS|
Gv}*Tw$
} Pt?]JJxl-
DEaO=p|
SortUtil： J56+eC(
B3'qmi<
package org.rut.util.algorithm; @xW)&d\'
,ORZtj
import org.rut.util.algorithm.support.BubbleSort; &2{h]V6
import org.rut.util.algorithm.support.HeapSort; -L6 rXQV@j
import org.rut.util.algorithm.support.ImprovedMergeSort; c@:r\]
import org.rut.util.algorithm.support.ImprovedQuickSort; LF0gy3
import org.rut.util.algorithm.support.InsertSort; sD.bBz
import org.rut.util.algorithm.support.MergeSort; I-i)D
import org.rut.util.algorithm.support.QuickSort; })Rmu."\
import org.rut.util.algorithm.support.SelectionSort; Roy0?6O
import org.rut.util.algorithm.support.ShellSort; O k_I}X
EW$ Je
/** =8j;!7p
* @author treeroot pc5-'; n
* @since 2006-2-2 SHPaSq'&N
* @version 1.0 Rs:<'A
*/ G.O0*E2V
public class SortUtil { 0,(U_+n
public final static int INSERT = 1; -@G|i$!
public final static int BUBBLE = 2; ]6</{b
public final static int SELECTION = 3; [syuoJ
public final static int SHELL = 4; 0b=OK0n!%
public final static int QUICK = 5; 3Qe:d_
public final static int IMPROVED_QUICK = 6; >/EmC3?b!
public final static int MERGE = 7; _h7+.U=
public final static int IMPROVED_MERGE = 8; dZRz'd
public final static int HEAP = 9; f 5_n2
,-t3gc1~X
public static void sort(int[] data) { J /'woc
sort(data, IMPROVED_QUICK); q,2]]K7y
} `|i #)
private static String[] name={ ` &|Rs
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z?h\7 R
}; J}TS-j0
;k/y[ x}
private static Sort[] impl=new Sort[]{ "tUXYY
new InsertSort(), 1^R@X
new BubbleSort(), tsU.c"^n
new SelectionSort(), //:.k#}~B
new ShellSort(), ji`N1e,l
new QuickSort(), Vy{=Y(cpF2
new ImprovedQuickSort(), `ItMn&P
new MergeSort(), U}6'_ PRQ
new ImprovedMergeSort(), AShJtxxa
new HeapSort() tz&=v,_jc
}; \^?BC;s^C
*4r 1g+0
public static String toString(int algorithm){ 9">}@1k
return name[algorithm-1]; WYwsTsG{_
} Et%s,zeA{2
B>t$Z5Q^X
public static void sort(int[] data, int algorithm) { O:RPH{D
impl[algorithm-1].sort(data); G[r_|-^S
} OAR1u}
_+%-WFS|
public static interface Sort { xg'z_W
public void sort(int[] data); D<#+ R"
} `.Y["f 1B
Mvrc[s+o
public static void swap(int[] data, int i, int j) { F^IYx~:
int temp = data; C!B2.:ja
data = data[j]; vML01SAi
data[j] = temp; f$iv+7<B^
} P 5m{}@g
} A"\kdxC