[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; O2Y|<m
} oVk!C a
int i1=l; [MAPa
int i2=mid+1; %6lGRq{/?
for(int cur=l;cur<=r;cur++){ uHquJQ4
if(i1==mid+1) ^[[@P(e>
data[cur]=temp[i2++]; -T+YMAFU_
else if(i2>r) bhRa?wuoY
data[cur]=temp[i1++]; :I?lT2+ea
else if(temp[i1] data[cur]=temp[i1++]; *j(fk[,i
else oD2! [&
data[cur]=temp[i2++]; .mrv"k\<
} 1H">Rb30@
} P2ySjgd
vRaxB
} 4 w*m]D{
}L Q%%
改进后的归并排序: mgjcA5z
gF9GU5T:
package org.rut.util.algorithm.support; @+~URIG)
uh9b!8
import org.rut.util.algorithm.SortUtil; V 7~9z\lW
z I9jxwXU
/** ysp,:)-%G@
* @author treeroot =1>G* ,
* @since 2006-2-2 c9H6\&
* @version 1.0 (Q `Ps/
*/ x^[0UA]S9
public class ImprovedMergeSort implements SortUtil.Sort { 9BOn8p;yz
p79QEIbk=
private static final int THRESHOLD = 10; (@T{ [\
D{8B;+
/* Ro$*bN6p
* (non-Javadoc) #bGYHN
* #r>)A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2PPb
*/ C4X3;l Z%S
public void sort(int[] data) { ;X;x.pi
int[] temp=new int[data.length]; Z1W%fT
mergeSort(data,temp,0,data.length-1); VZamR}x
} p{qA%D
8M3DG=D
private void mergeSort(int[] data, int[] temp, int l, int r) { r.LOj6c
int i, j, k; CPsl/.$tC
int mid = (l + r) / 2; nmL|v
if (l == r) -*&aE~Cs
return; M4?>x[Pw
if ((mid - l) >= THRESHOLD) Tl_o+jj
mergeSort(data, temp, l, mid); #.]W>hN8\
else x=K'Jj
insertSort(data, l, mid - l + 1); a]V#mF |{
if ((r - mid) > THRESHOLD) `mZ1!I-T
mergeSort(data, temp, mid + 1, r); 5't9/8i
else U\{I09@E 0
insertSort(data, mid + 1, r - mid); [4;_8-[Nv
v8uUv%Hkd
for (i = l; i <= mid; i++) { OPq6)(Q
temp = data; F-~Xbz%
} &% (1?\~u
for (j = 1; j <= r - mid; j++) { WzdlrkD
temp[r - j + 1] = data[j + mid]; Eos;7$u[
} iH>JR[A
int a = temp[l]; 8PeVHpZ
int b = temp[r]; g-x;a0MQx
for (i = l, j = r, k = l; k <= r; k++) { 8j]QnH0&
if (a < b) { kotKKs
data[k] = temp[i++]; <#Fex'4
a = temp; jtpk5 fJB
} else { ept:<!4
data[k] = temp[j--]; {9@E[bWp#
b = temp[j]; DB jUHirK
} \Ff]}4
} ]=|iO~WN
} `N7erM
&8%^o9sH
/** REX/:sB<
* @param data w3fD6$
* @param l Uq%|v
* @param i "$"<AKCwS
*/ rTC|8e
private void insertSort(int[] data, int start, int len) { P4MP`A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6QPbmO]z
} w3>G3=b
} H?ue!5R#L
} (a,`Y.
} Xn!=/<TIVz
&$qIJvMiK
堆排序： ]/R>nT
]YDqmIW
package org.rut.util.algorithm.support; "tK3h3/Xv
La^Zr,T!
import org.rut.util.algorithm.SortUtil; f|!@H><
{qry2ZT5
/** Jju?v2y`
* @author treeroot 5(\[Gke
* @since 2006-2-2 lm'.G99{
* @version 1.0 ?K.!^G
*/ Gv(n2r
public class HeapSort implements SortUtil.Sort{ <(qdxdUp
e [F33%
/* (non-Javadoc) p7*7V.>X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ybB<AkYc
*/ wz:w6q
public void sort(int[] data) { _B]Bd@<w
MaxHeap h=new MaxHeap(); 3 }rx(
h.init(data); #)6 bfyi-
for(int i=0;i h.remove(); 4x/u$Ixzh=
System.arraycopy(h.queue,1,data,0,data.length); `UkjrMO
} &)~LGWBdC
xA}{ZnTbN
private static class MaxHeap{ i079 V
q,'~=Y5
void init(int[] data){ SYOU&*
this.queue=new int[data.length+1]; 8wS9%+
for(int i=0;i queue[++size]=data; }4>#s$.2
fixUp(size); Z\$!:
} 4T<dI6I0
} |@ZyD$?
jm|zn
private int size=0; Rn whkb&&
y+VRD
private int[] queue; k#@)gL
%bnjK#o"Q
public int get() { ;u%4K$
return queue[1]; 3'`X_C|d53
} `,wX&@sN
l%xeM!}
public void remove() { klj.\wg/p{
SortUtil.swap(queue,1,size--); Au?(_*/0
fixDown(1); Yr:$)ap
} *-_joAWTG
file://fixdown IG@@CH
private void fixDown(int k) { (b1rd
int j; X`daaG_l
while ((j = k << 1) <= size) { j)O8&[y=
if (j < size %26amp;%26amp; queue[j] j++; ;77q~_g$
if (queue[k]>queue[j]) file://不用交换 A'? W5~F
break; D-5~CK4`
SortUtil.swap(queue,j,k); ~/R}K g(
k = j; nx4E}8!Lh
} t== a(e
} RQ51xTOL4]
private void fixUp(int k) { 'nqVcNgb
while (k > 1) { "}UYsXg
int j = k >> 1; pvd9wKz
if (queue[j]>queue[k]) 7m9T'
break; ngaQa-8w
SortUtil.swap(queue,j,k); ),I7+rY
k = j; AzBpQb*
} c6pGy%T-
} S4X['0rX!
n!XSB7d~X
} d e~3:
:20k6)
} v{>9&o.J
$S!WW|9j.
SortUtil： #*K!@X
X<$8'/p r
package org.rut.util.algorithm; : ]JsUb{YK
\"@`Rf
import org.rut.util.algorithm.support.BubbleSort; N6-bUM6%I
import org.rut.util.algorithm.support.HeapSort; GEf[k OQ
import org.rut.util.algorithm.support.ImprovedMergeSort; 04<T2)QgK
import org.rut.util.algorithm.support.ImprovedQuickSort; D61e
import org.rut.util.algorithm.support.InsertSort; }=."X8zOI8
import org.rut.util.algorithm.support.MergeSort; jLf87
import org.rut.util.algorithm.support.QuickSort; 15~+Ga4
import org.rut.util.algorithm.support.SelectionSort; r;aP`MVO<
import org.rut.util.algorithm.support.ShellSort; &@xeWB
&28n1
/** Sst`*PX:
* @author treeroot l{x?i00tAS
* @since 2006-2-2 m4@w M?
* @version 1.0 d "vd_}P~
*/ ('pxX+
public class SortUtil { pDx}~IB
public final static int INSERT = 1; Kx[z7]1@
public final static int BUBBLE = 2; -[`FNTTV C
public final static int SELECTION = 3; Aonq;} V e
public final static int SHELL = 4; Th//uI+
public final static int QUICK = 5; }tZA7),L
public final static int IMPROVED_QUICK = 6; >pl*2M&
public final static int MERGE = 7; oE4hGt5x{
public final static int IMPROVED_MERGE = 8; 6hm6h7$F1
public final static int HEAP = 9; 7QkAr
,s1n!@9
public static void sort(int[] data) { ui6B
sort(data, IMPROVED_QUICK); r\66]u[
} 0#KB.2AP
private static String[] name={ 8M'6Kcr
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" { e%
}; l+V5dZ8W
"ae55ft//
private static Sort[] impl=new Sort[]{ yo0?QRT
new InsertSort(), _j2h3lCT
new BubbleSort(), !P26$US%P
new SelectionSort(), Iq[,)$
new ShellSort(), $/(H%f&
new QuickSort(), a?!Joi[
new ImprovedQuickSort(), NeyGIEP
new MergeSort(), /`Lki>"
new ImprovedMergeSort(), W\<5'9LNb
new HeapSort() HCifO
}; ,Pd2ZfZ
[%8+Fa~Wa
public static String toString(int algorithm){ ]g;K_>@
return name[algorithm-1]; j{'@g[HW
} gB@Wv91
.tb~f@xL
public static void sort(int[] data, int algorithm) { ARu^hz=
impl[algorithm-1].sort(data); 5+O#5"v_
} <cz~q=%v2&
wB( igPi
public static interface Sort { l9.wMs*`X
public void sort(int[] data); ),6Z1 K1
} c$'UfW
g%<7Px[W
public static void swap(int[] data, int i, int j) { {:enoV"
int temp = data; 6A/|XwfE/v
data = data[j]; K~WwV8c9;
data[j] = temp; Ja#idF[V
} /qL&)24
} qQ6NxhQo