[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; p=V (_
} vE^Hk!^
int i1=l; uAwT)km {
int i2=mid+1; );'8*e'
for(int cur=l;cur<=r;cur++){ +h.$<=
if(i1==mid+1) fE8/tx](
data[cur]=temp[i2++]; iZyhj%#
else if(i2>r) :%~+&qS
data[cur]=temp[i1++]; -$!`8[fM
else if(temp[i1] data[cur]=temp[i1++]; /{#1w\
else "z8L}IC!e5
data[cur]=temp[i2++]; .n'z\]-/Q
} ppP7jiGo
} "X=l7{c/
IDyf9Zra?
} K\v1o
80U07tJ
改进后的归并排序: LzEs_B=9
P33x/#VVE
package org.rut.util.algorithm.support; u(S~V+<@Z
v `9IS+Z
import org.rut.util.algorithm.SortUtil; Zu951+&`
"JzQCY^C
/** ?kMG!stgp}
* @author treeroot ,dOd3y'y
* @since 2006-2-2 wM8Gz.9,
* @version 1.0 UJ3l8 %/`k
*/ ~&8ag`
public class ImprovedMergeSort implements SortUtil.Sort { M#c.(QdF
x >hnH{~w
private static final int THRESHOLD = 10; ep* (
r~N0P|Tq
/* dcew`$SJp
* (non-Javadoc) -$yNJ5F`
* { AdPC?R`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gpB3\
*/ GdVq+,Ge
public void sort(int[] data) { PBc.}TSGj
int[] temp=new int[data.length]; x<W`2Du
mergeSort(data,temp,0,data.length-1); R/&Bze
} t&MJSFkiA
of!Bz
private void mergeSort(int[] data, int[] temp, int l, int r) { u|t<f`ze
int i, j, k; F$T@OT6
int mid = (l + r) / 2; ^kA^>vi
if (l == r) 1'@/jR
return; tEhYQZ
if ((mid - l) >= THRESHOLD) ppH5>Y 6c
mergeSort(data, temp, l, mid); ?~s,O$o
else xcz[w}{eEq
insertSort(data, l, mid - l + 1); *(5y;1KU
if ((r - mid) > THRESHOLD) !B_i~Rmg
mergeSort(data, temp, mid + 1, r); ,R_ KLd
else xFvDKW)_X7
insertSort(data, mid + 1, r - mid); 7m3|2Qv
?4vf2n@
for (i = l; i <= mid; i++) { d#6'dKV$
temp = data; UT!gAU
} 8:E)GhX
for (j = 1; j <= r - mid; j++) { .cJWYMC
temp[r - j + 1] = data[j + mid]; R1u1
} ". #=_/op
int a = temp[l]; T5(]/v,UT
int b = temp[r]; QhUv(]0
for (i = l, j = r, k = l; k <= r; k++) { 6Tjj++b(*
if (a < b) { t4>%<'>e
data[k] = temp[i++]; A82Bn|J
a = temp; hqOy*!8'@
} else { "5Orj*{
data[k] = temp[j--]; %v 0 I;t
b = temp[j]; 6B>1"h%Wf
} -?{bCq
} szW_cjS
} b/65Q&g'
(T+fO}0
/** WxwSb`U|
* @param data _EMq"\ND
* @param l -v"\WmcS
* @param i r:Uqtqxh
*/ /;>U0~K
private void insertSort(int[] data, int start, int len) { K8xwPoRL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); G&8)5d[
} KZ_d..l*W
} ,Yx"3i,
} VQA}!p
} |L|)r)t
"#Ov!t
堆排序： ]gI>ay"\QA
49. @Uzo
package org.rut.util.algorithm.support; 1haNca_6,
<5rs~
import org.rut.util.algorithm.SortUtil; #m yiZL%
z/09~Hc
/** DL0jA/f
* @author treeroot )9LlM2+y
* @since 2006-2-2 c|?0iN
* @version 1.0 F|.,lb |L
*/ GiI|6z!
public class HeapSort implements SortUtil.Sort{ @n<y[WA
L,G{ t^j
/* (non-Javadoc) Ucnj7>+"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wV\;,(<x=%
*/ a|aRUxa0"
public void sort(int[] data) { H{}0-0o
MaxHeap h=new MaxHeap(); zGKDH=Yy ;
h.init(data); lFvRXV^+f
for(int i=0;i h.remove(); :6R0=oz
System.arraycopy(h.queue,1,data,0,data.length); hF`e>?bN
} W[B%,Km%]
pe(31%(h
private static class MaxHeap{ %g1{nGah
"p]bsJG
void init(int[] data){ `R:p-"'b
this.queue=new int[data.length+1]; *6uZ"4rb.
for(int i=0;i queue[++size]=data; (Ic{C5'
fixUp(size); %tx~CD
} ?M2#fD]e
} !&4<"wQ
Lbb{z
private int size=0; K5X,J/n
O7r<6(q(
private int[] queue; 9[.vtk\iyH
a3}#lY):
public int get() { F<SCW+>z2a
return queue[1]; ma4Pmk
} [Y@?l]&
+%yVW f
public void remove() { !YUMAp/
SortUtil.swap(queue,1,size--); B<)c{kj
fixDown(1); /JaCbT?*T
} BGAqg=nDV
file://fixdown &n:3n
private void fixDown(int k) { S0X%IG
int j; s"1:#.u
while ((j = k << 1) <= size) { "r@f&Ssxb
if (j < size %26amp;%26amp; queue[j] j++; G55-{y9Q
if (queue[k]>queue[j]) file://不用交换 B_;W!
break; (`V
SortUtil.swap(queue,j,k); f n]rMH4>
k = j; kaSi sjd
} @ s
} h4@v.GI
private void fixUp(int k) { InI^,&<
while (k > 1) { WH`E=p^x4
int j = k >> 1; pUs:r0B
if (queue[j]>queue[k]) {a>a?fVU
break; v=n'#:k
SortUtil.swap(queue,j,k); b-sbRR
k = j; n<Vq@=9AE
} WxNPAJ6YH
} HK~uu5j
^a9v5hu
} D$k<<dvv
>:5^4/fo*
} \W^Mo>l
<sXmk{
SortUtil： w&6c`az8
EBF608nWfW
package org.rut.util.algorithm; Koh`|]N
@8[3]<
import org.rut.util.algorithm.support.BubbleSort; OC0dAxq
import org.rut.util.algorithm.support.HeapSort; 8)(<U/
import org.rut.util.algorithm.support.ImprovedMergeSort; Xy_ <Yqx}
import org.rut.util.algorithm.support.ImprovedQuickSort; vN=bd7^?=
import org.rut.util.algorithm.support.InsertSort; rL+K Sb
import org.rut.util.algorithm.support.MergeSort; "BN-Jvb7q
import org.rut.util.algorithm.support.QuickSort; P(z#Wk
import org.rut.util.algorithm.support.SelectionSort; 8;'fWV? U
import org.rut.util.algorithm.support.ShellSort; {+Rf?'JZH
YS$?Wz
/** 1Ql\aO)
* @author treeroot RI,Z&kXj2o
* @since 2006-2-2 V{51wnxT
* @version 1.0 lZpa)1.tiC
*/ jY.iQBhjEB
public class SortUtil { 7|~j=,HU+Z
public final static int INSERT = 1; 3:q\]]]S
public final static int BUBBLE = 2; %m8;Lh-X
public final static int SELECTION = 3; P\"|b\O1
public final static int SHELL = 4; Kv**(~FNnH
public final static int QUICK = 5; TF)OBN~/
public final static int IMPROVED_QUICK = 6; &?.k-:iN
public final static int MERGE = 7; E_VLI'Hn?
public final static int IMPROVED_MERGE = 8; 4JlB\8rc
public final static int HEAP = 9; l.tNq$3pS
6mH0|:CsY
public static void sort(int[] data) { 7nh,j <~;2
sort(data, IMPROVED_QUICK); aOWE\Ic8
} !E\xn^
private static String[] name={ ;d"F'd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q%HT)^F9oO
}; &p\fdR4e
{~=Edf
private static Sort[] impl=new Sort[]{ )"j)9RQ}
new InsertSort(), fX)C8J^=G
new BubbleSort(), d',OQ,~{
new SelectionSort(), 9v7l@2/
new ShellSort(), *G{%]\s?
new QuickSort(), ?t LJe
new ImprovedQuickSort(), XY(3!>/eQ[
new MergeSort(), IvLo&6swW
new ImprovedMergeSort(), -Fcg}\9
new HeapSort() Y6(I %hE`
}; X2 {n&K
&@E{0ZD
public static String toString(int algorithm){ 5<-_"/_
return name[algorithm-1]; ]ZkhQ%
} j~+<~2%c
d ]LF5*i
public static void sort(int[] data, int algorithm) { 5B+>28G%
impl[algorithm-1].sort(data); >Le L%$
} _c}@Fi+E
FU-YI"
public static interface Sort { rDNz<{evj
public void sort(int[] data); k(Z+(Y'{q~
} /|{Yot e
y=!"++T]B<
public static void swap(int[] data, int i, int j) { p1B~:9y9X
int temp = data; XW!a?aLNX
data = data[j]; k(n{$
data[j] = temp; &m=Xg(G~c
} }{Y)[w#R
} <I.anIB:U