[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; vK2L"e
} K mL PWj
int i1=l; "p$`CUtI
int i2=mid+1; ] J:^$]
for(int cur=l;cur<=r;cur++){ jsi\*5=9p<
if(i1==mid+1) *W#x#0j
data[cur]=temp[i2++]; 9>%f99n
else if(i2>r) PlBT H
data[cur]=temp[i1++]; 'SOp!h$
else if(temp[i1] data[cur]=temp[i1++]; ULQ*cW&;?
else ApS/,cV
data[cur]=temp[i2++]; P8;|>OLZ)
} W@pVP4F0xM
} 2/>AmVM
VN`2bp>5I
} SjG=H%
6 D~b9e
改进后的归并排序: 4[+n;OI
-?'u"*#1,
package org.rut.util.algorithm.support; vco:6Ab$
)v ['p
import org.rut.util.algorithm.SortUtil; =b !f
\Sg&Qv`
/** '+'
* @author treeroot ]j_S2lt
* @since 2006-2-2 hc~--[1c:
* @version 1.0 >Qt#6X|
*/ mC J/gWDY
public class ImprovedMergeSort implements SortUtil.Sort { =_Qt&B)
- n11L
private static final int THRESHOLD = 10; n%Nf\z
]km8M^P
/* (x?A#o>%
* (non-Javadoc) \JN<"/
* lR;<6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1 ht4LRFi
*/ nm\n\j~
public void sort(int[] data) { >JC.qjA
int[] temp=new int[data.length]; 3-LO
mergeSort(data,temp,0,data.length-1); `iQyKZS/+
} dsJ}C|N
Cw Z{&
private void mergeSort(int[] data, int[] temp, int l, int r) { 4[bw/[
int i, j, k; m6'YFpf)V
int mid = (l + r) / 2; "L{;=-e
if (l == r) oPre$YT}h
return; $@Hw DRP
if ((mid - l) >= THRESHOLD) p?8>9
mergeSort(data, temp, l, mid); `\O[9.B
else AO/J:`
insertSort(data, l, mid - l + 1); %2/WyD$U
if ((r - mid) > THRESHOLD) 0g`WRe
mergeSort(data, temp, mid + 1, r); n6ud;jN|
else O6boTB_2
insertSort(data, mid + 1, r - mid); 6OIA>%{
7jEAhi!Cq(
for (i = l; i <= mid; i++) { Z@~8iAgE
temp = data; W&Fa8
} <8jn_6
for (j = 1; j <= r - mid; j++) { 3H4p$\;C
temp[r - j + 1] = data[j + mid]; +J.^JXyp0
} 5l{_E:.1
int a = temp[l]; 51&wH
int b = temp[r]; 8kO|t!?:U
for (i = l, j = r, k = l; k <= r; k++) { b4,yLVi<T
if (a < b) { tEf-BV;\y
data[k] = temp[i++]; 2R|2yAh
a = temp; 0/-[k
} else { R,6?1Z:J
data[k] = temp[j--]; HHg=:>L z
b = temp[j]; MZ% P(5
} qK(?\t$
} S}fIZ1
} t{x&|%u
M{hA`
/** '4N[bRCn
* @param data !cWKY\lpv
* @param l U/{cYX
* @param i )RA7Y}e|m
*/ ]+fL6"OD/2
private void insertSort(int[] data, int start, int len) { ){8^l0b
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %H%>6z x
} ^H&6'A`
} {e>}.R
} 5UjXpS
} mufF_e)
Z\LW<**b
堆排序： (QqKttL:
=BNmuAY7
package org.rut.util.algorithm.support; #l{qb]n]
J#'c+\B<2X
import org.rut.util.algorithm.SortUtil; CUY2eQJ{U
>f}rM20Vm
/** cAIS?]1
* @author treeroot W 4 )^8/
* @since 2006-2-2 O:k@'&
* @version 1.0 ]6}|X#_
*/ F<G.!Y8!&
public class HeapSort implements SortUtil.Sort{ z[CCgs&vqe
qj=12;
/* (non-Javadoc) C2DNyMu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H-0deJ[>
*/ ]TD]
public void sort(int[] data) { vW YN?"d
MaxHeap h=new MaxHeap(); hM+nA::w
h.init(data); ^Z2%b>
for(int i=0;i h.remove(); cl14FrpYu
System.arraycopy(h.queue,1,data,0,data.length); ?XW+&!ar
} 3}Uae#oy
RwY) O5
private static class MaxHeap{ &eg]8kV
|V:k8Ab
void init(int[] data){ h*d&2>"0m?
this.queue=new int[data.length+1]; }2JSa8
for(int i=0;i queue[++size]=data; "&v?>
fixUp(size); I,t 0X)
} GRlA9Q
} 6t*=.b,N
8fZ\})t
private int size=0; qdO^)uJJ
C.(<KV{b
private int[] queue; ,!u^E|24
1 5rE|m^
public int get() { .KK"KO5k
return queue[1]; :t9(T?2
} H6e^"E
<>2QDI6_
public void remove() { )3z.{.F
SortUtil.swap(queue,1,size--); 31J7# S2
fixDown(1); IKAF%0[R|j
} cUS2*7h
file://fixdown 5.5dB2w
private void fixDown(int k) { ilpg()
int j; N[zI@>x
while ((j = k << 1) <= size) { 42Ql^ka
if (j < size %26amp;%26amp; queue[j] j++; qlDLZ.
if (queue[k]>queue[j]) file://不用交换 sm\/wlbE
break; */?L_\7
SortUtil.swap(queue,j,k); x{RTI#a.
k = j; $"x(:
} dp_J*8
} oLBpG1Va
private void fixUp(int k) { WMl_$Fd6
while (k > 1) { .DCp)&m l;
int j = k >> 1; }RW4
if (queue[j]>queue[k]) BOfO$J}
break; YHCXVu<.b
SortUtil.swap(queue,j,k); y 0M&Bh
k = j; ${e(#bvGZ
} tHhY1[A8m
} 6S]GSS<
0*q~(.>a
} @AVx4,!>[
VJuPC
} T73saeN
[y>Q3UqN
SortUtil： /rJvw
9.PY49|
package org.rut.util.algorithm; ;41s&~eR
$3"0w
import org.rut.util.algorithm.support.BubbleSort; Zp]Bs
import org.rut.util.algorithm.support.HeapSort; t_P1a0Zu
import org.rut.util.algorithm.support.ImprovedMergeSort; /"Rh bE
import org.rut.util.algorithm.support.ImprovedQuickSort; KasOh"W.P
import org.rut.util.algorithm.support.InsertSort; +Y 3_)
import org.rut.util.algorithm.support.MergeSort; 0-FwHDxw
import org.rut.util.algorithm.support.QuickSort; xAz gQ
import org.rut.util.algorithm.support.SelectionSort; ^W#[6]S
import org.rut.util.algorithm.support.ShellSort; A+Z3b:}~
69q8t*%O
/** N9{ivq|fO
* @author treeroot $+*ZsIo
* @since 2006-2-2 *GD 1[:
* @version 1.0 j>0S3P,
*/ 6^|bKoN/ f
public class SortUtil { TvM{ QGN
public final static int INSERT = 1; VwtGHF'
public final static int BUBBLE = 2; ^JYR^X>_
public final static int SELECTION = 3; t}NxD`8
public final static int SHELL = 4; r]8tl
public final static int QUICK = 5; |(y6O5Y.
public final static int IMPROVED_QUICK = 6; L\hPw{)
public final static int MERGE = 7; `1pri0!
public final static int IMPROVED_MERGE = 8; o&I0*~sN
public final static int HEAP = 9; y]cx}9~
/j3oHi$
public static void sort(int[] data) { vR+(7^Yy
sort(data, IMPROVED_QUICK); s?OGB}
} F"B!r-J
private static String[] name={ ?Vt$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r+$ 0u~^
}; etGquW.
eb.`Q+Gb
private static Sort[] impl=new Sort[]{ {SK8Mdn
new InsertSort(), *7!}[ v_
new BubbleSort(), x40R)Led
new SelectionSort(), Mzxz-cE
new ShellSort(), P\SD_8
new QuickSort(), /Tv< l
new ImprovedQuickSort(), uiHlaMf
new MergeSort(), `EWeJ(4Z@
new ImprovedMergeSort(), )Tb{O
new HeapSort() 4p %`Lv
}; S7N54X2JwL
@JN%P}4)
public static String toString(int algorithm){ )t)tk=R9N
return name[algorithm-1]; dqd Qt_
} B%'Np7
,9W0fm\t
public static void sort(int[] data, int algorithm) { G)b]uX
impl[algorithm-1].sort(data); 8|yhe%-O
} T5Pc2R
?&/9b)cS
public static interface Sort { F!aYK2
public void sort(int[] data); ~{+J~5!;<H
} t7)Y@gRy
S :(1=@
public static void swap(int[] data, int i, int j) { qJISB7F[%O
int temp = data; ^Ko0zz|R/
data = data[j]; %}$6#5"';
data[j] = temp; |fRajuA;
} TzX>d<x
} Vvv -f