[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; KCTX2eNN&h
} V#dga5*]
int i1=l; '?9zL*
int i2=mid+1; 'M>m$cCMZ
for(int cur=l;cur<=r;cur++){ aq$ hE-{28
if(i1==mid+1) :/|"db&`
data[cur]=temp[i2++]; "wOfs$w%s
else if(i2>r) 4`#Q
data[cur]=temp[i1++]; )k,n}
else if(temp[i1] data[cur]=temp[i1++]; DSz[,AaR]
else 7tcadXk0
data[cur]=temp[i2++]; 5&n{QE?Um
} >l&]Ho
} Y'|,vG
4uIYX
} EpAgKzVpJ
Z71m(//*}
改进后的归并排序: D|9+:Y
*(Dmd$|0|
package org.rut.util.algorithm.support; u)0I$Tc"
<R$ 2x_
import org.rut.util.algorithm.SortUtil; N;|^C{uz
sWYnoRxu
/** } jj)
* @author treeroot hX{,P:d=f
* @since 2006-2-2 en< $.aY
* @version 1.0 {Uw 0zC
*/ =D/zC'l
public class ImprovedMergeSort implements SortUtil.Sort { O6;"cUv
l\s!A&L
private static final int THRESHOLD = 10; f(5(V %
.ImaM
/* ZkbE&7Z
* (non-Javadoc) s7Agr!>f
* BNK]Os
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nzflUR{`-
*/ h+g\tYWGP
public void sort(int[] data) { #Lhv=0op
int[] temp=new int[data.length]; G|g^yaq>
mergeSort(data,temp,0,data.length-1); nQc#AFg
} /WTEz\k
p:4jY|q
private void mergeSort(int[] data, int[] temp, int l, int r) { h+[6i{
int i, j, k; O_:l;D#i
int mid = (l + r) / 2; _nbr%PD,
if (l == r) X 0y$xC|<
return; T^}UE<
if ((mid - l) >= THRESHOLD) sW[-qPK<
mergeSort(data, temp, l, mid); A"V mxP
else >7>I1
insertSort(data, l, mid - l + 1); AYbO~_a\N
if ((r - mid) > THRESHOLD) eQbHf
mergeSort(data, temp, mid + 1, r); <>3)S`C`p
else IO+]^nY`
insertSort(data, mid + 1, r - mid); qNEp3WY:
"bo0O7InOV
for (i = l; i <= mid; i++) { o:@Q1+p
temp = data; Urr%SIakvM
} L|'^P3#7`
for (j = 1; j <= r - mid; j++) { >pU9}2fpT
temp[r - j + 1] = data[j + mid]; I/dy^5@F
} !ZBtXt#P
int a = temp[l]; [C "\]LiX
int b = temp[r]; 3$\k=q3`#
for (i = l, j = r, k = l; k <= r; k++) { W'[V$*
if (a < b) { 'h*jL@%TT
data[k] = temp[i++]; <gp?}Lk
a = temp; XNJ4T]><
} else { t7+A!7b{
data[k] = temp[j--]; EA& 3rI>U)
b = temp[j]; xl\Kj2^
} $m4-^=
} x)::^'74
} ~K;QdV=YX
":Dm/g
/** iQ)ydY a
* @param data W7>2&$
* @param l +<7Oj s>o
* @param i >d/H4;8
*/ Gnkar[oa&
private void insertSort(int[] data, int start, int len) { OR<+y~Rv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (@1:1K(
} 6CY&pbR
} %=aKW[uq]
} XIW0Z C
} {D+mr[ %
oh9 ;_~
堆排序： jm^.E\_
P\jGySj
package org.rut.util.algorithm.support; JVE\{ e)
& LE5'.s
import org.rut.util.algorithm.SortUtil; &R94xh%@(
&|hK79D
/** :?t~|7O:
* @author treeroot 2c9?,Le/;
* @since 2006-2-2 ]b4WfIu
* @version 1.0 *M.xVUPr
*/ (eN7s_
public class HeapSort implements SortUtil.Sort{ j6rNt|
";K w?
/* (non-Javadoc) >fPo_@O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QZ a.c
*/ pO`KtagL
public void sort(int[] data) { P49\A^5S!
MaxHeap h=new MaxHeap(); <L&EH@T
h.init(data); *DL7p8
for(int i=0;i h.remove(); ScPVjqG2{
System.arraycopy(h.queue,1,data,0,data.length); v,KKn\X
} 4-(kk0]`z
~66xO9s
private static class MaxHeap{ m#7(<#
>Fel) a
void init(int[] data){ </h^%mnd
this.queue=new int[data.length+1]; >L7s[vKn
for(int i=0;i queue[++size]=data; ^J'_CA
fixUp(size); / ;]5X
} ht3.e[%'b
} (`P\nnb
lPTx] =G
private int size=0; }Z!D?(
%q{q.(M#
private int[] queue; *r7vDc
%Sr+D{B
public int get() { 7},A.q
return queue[1]; =CX1jrLZ
} K@D\5s|1|
)#=J<OpG
public void remove() { ]\$/:f-2
SortUtil.swap(queue,1,size--); +#W94s~0V
fixDown(1); Gz[yD ~6a
} ud1M-lY\U
file://fixdown kxn&f(5
private void fixDown(int k) { }Mcb\+[
int j; <wH+\
while ((j = k << 1) <= size) { j)A#}4jd
if (j < size %26amp;%26amp; queue[j] j++; D&@]
if (queue[k]>queue[j]) file://不用交换 S{@}ECla
break; zw0w."V
SortUtil.swap(queue,j,k); XX6Z|Y5.
k = j; #/)t]&n
} *XVwTW[a
} A4K.,bZ
private void fixUp(int k) { wQkM:=t5
while (k > 1) { a?c&#Jl
int j = k >> 1; !vnQ;g5
if (queue[j]>queue[k]) vF$i"^;tJ;
break; 7s9h:/Lu
SortUtil.swap(queue,j,k); wj|Zn+{"nF
k = j; Vz{+3vfra6
} ]Bw0Qq F#
} sDY~jP[Oa
IK~&`n](>
} [6/QUD8
0XHQ5+"8
} M6Fo.eeK3
Q?{%c[s
SortUtil： U84W(X
P]E-Wp'p
package org.rut.util.algorithm; j0jl$^
q'2vE;z Kb
import org.rut.util.algorithm.support.BubbleSort; \l%xuT
import org.rut.util.algorithm.support.HeapSort; ny={OhP-
import org.rut.util.algorithm.support.ImprovedMergeSort; ~E<2gMKjO
import org.rut.util.algorithm.support.ImprovedQuickSort; d:H'[l.F%
import org.rut.util.algorithm.support.InsertSort; l'@-?p(Vuw
import org.rut.util.algorithm.support.MergeSort; VJh8`PVX
import org.rut.util.algorithm.support.QuickSort; e~'`x38
import org.rut.util.algorithm.support.SelectionSort; jN=<dq ~
import org.rut.util.algorithm.support.ShellSort; P&-o>mM
<Au2e
/** H=t"qEp
* @author treeroot ]S|FK>U[
* @since 2006-2-2 niVR!l
* @version 1.0 !xM5 A[f
*/ KWTV!Wxb=K
public class SortUtil { eRauyL"Q+
public final static int INSERT = 1; B@,9Cx564
public final static int BUBBLE = 2; {|;a?]?
public final static int SELECTION = 3; x-^6U
public final static int SHELL = 4; 8a)AuAi?!
public final static int QUICK = 5; /r}L_wI
public final static int IMPROVED_QUICK = 6; q2GW3t
public final static int MERGE = 7; D7Q+w
public final static int IMPROVED_MERGE = 8; En5oi
public final static int HEAP = 9; [3%mNNk
M>Q]{/V7T
public static void sort(int[] data) { *Ak.KBg
sort(data, IMPROVED_QUICK); f0<zK!
} md!6@)S-p
private static String[] name={ 1GY2aZ@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %|Ps|iV
}; k3\N.@\
D}-.<
private static Sort[] impl=new Sort[]{ 98m|&7
new InsertSort(), =;}W)V|X)S
new BubbleSort(), jm_-f
new SelectionSort(), !e$gp(4
new ShellSort(), 5J5si<v25
new QuickSort(), DE?v'7cmA
new ImprovedQuickSort(), . ,7bGY 1$
new MergeSort(), p!.~hw9
new ImprovedMergeSort(), ~%{2Z_t$
new HeapSort() PnsBDf%v
}; Jh[0xb
Onmmcem
public static String toString(int algorithm){ Z$oy;j99y
return name[algorithm-1]; ?KT{H(rU
} "LyD
cby#
public static void sort(int[] data, int algorithm) { i`,FXF)
impl[algorithm-1].sort(data); "S#FI
} ^?z%f_ri
8hRcB[F~S
public static interface Sort { 1MelHW
public void sort(int[] data); f60w%
} Iv`IJQH>
8:cbr/F<
public static void swap(int[] data, int i, int j) { H=dIZ
int temp = data; ?^|`A}q#
data = data[j]; 4aayMS!#
data[j] = temp; Hl*vS
} Cu"Cpt[
} .UyE|t4