[JAVA]用Java实现的各种排序

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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; q$:T<mFK$
} nHD4J;l
int i1=l; F3H)B:
int i2=mid+1; W>wE8? _,
for(int cur=l;cur<=r;cur++){ 6/nhz6=
if(i1==mid+1) hP3I_I[qF}
data[cur]=temp[i2++]; 5{,/m"-
else if(i2>r) Z(/jQ=ozQ
data[cur]=temp[i1++]; G A2S
else if(temp[i1] data[cur]=temp[i1++]; egx(N <
else e_k1pox]l
data[cur]=temp[i2++]; fcnbPO0M
} a3R#Bg(
} u;!CQ w/
}(op;7
} U+~0m!|4
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改进后的归并排序: b=K
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package org.rut.util.algorithm.support; W zy8
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import org.rut.util.algorithm.SortUtil; Wf0ui1@
@L{HT8utK3
/** +;:i,`Lmg
* @author treeroot Q&`$:h.~
* @since 2006-2-2 LtejLCf/
* @version 1.0 "F"G(ba^
*/ !?O:%QG
public class ImprovedMergeSort implements SortUtil.Sort { z[z'.{;D
bC?t4-W
private static final int THRESHOLD = 10; Wj.)wr!
:ozHuHJ#
/* D~NH 4B
* (non-Javadoc) >^n'
* 2NIK0%6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;oob TW{
*/ 9zi/z_G
public void sort(int[] data) { <MT_zET
int[] temp=new int[data.length]; Zp- Av8
mergeSort(data,temp,0,data.length-1); g 4Vt"2|
} $qg5m,1?
aJI>qk h?]
private void mergeSort(int[] data, int[] temp, int l, int r) { d cPh@3
int i, j, k; @_1$ <8
int mid = (l + r) / 2; J>!p^|S{
if (l == r) )bi*y`UM]
return; \Qu~iB(Y
if ((mid - l) >= THRESHOLD) VI" ,E}
mergeSort(data, temp, l, mid); =2J+}ac
else N5%~~JRO
insertSort(data, l, mid - l + 1); 47`{ e_YP0
if ((r - mid) > THRESHOLD) Tk.MtIs)V}
mergeSort(data, temp, mid + 1, r); Q}\,7l
else 7 &GhJ^Ku
insertSort(data, mid + 1, r - mid); pfZn<n5p
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for (i = l; i <= mid; i++) { =*"Amd,
temp = data; uW Q`
} wqA5GK>m2
for (j = 1; j <= r - mid; j++) { )ckx&e
temp[r - j + 1] = data[j + mid]; 5!tmG- 'b
} N4)&K[
int a = temp[l]; YA{Kgc^
int b = temp[r]; [OH>NpL
for (i = l, j = r, k = l; k <= r; k++) { {\C$Bz
if (a < b) { /YUf('b
data[k] = temp[i++]; x9-K}s]%
a = temp; P63z8^y
} else { if#$wm%
data[k] = temp[j--]; -7m;rD4J
b = temp[j]; KGP2,U6
} ScZ$&n
} N;r,B
} rd%3eR?V
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/** X=${`n%LG
* @param data c7wza/r>
* @param l u+8_et5T
* @param i 3,N7Nfe
*/ >tib21*
private void insertSort(int[] data, int start, int len) { !l.Rv_o<O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sE>'~+1_O
} z_A%>E4
} WYEvW<Hv
} 3i35F.=X,
} ^]E| >~\
/*rMveT
堆排序： FCqs'
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package org.rut.util.algorithm.support; bTHJbpt*-
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import org.rut.util.algorithm.SortUtil; ~;bwfp_
w<\N-J|m
/** dn%/SJC
* @author treeroot bsqoR8
* @since 2006-2-2 Q6Jb]>g\H
* @version 1.0 G!0|ocE}
*/ O}#*U+j
public class HeapSort implements SortUtil.Sort{ oY+RG|j@
_@?]!J[
/* (non-Javadoc) d=lZhqY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pSV 8!
*/ 1DZGb)OU
public void sort(int[] data) { 4XX21<yn
MaxHeap h=new MaxHeap(); B: {bmvy
h.init(data); p)TH^87
for(int i=0;i h.remove(); 'y'>0'et
System.arraycopy(h.queue,1,data,0,data.length); Eptsxyz{
} Kq-y1h]7H
aASnk2DFd
private static class MaxHeap{ hrEKmRmF-
v,g,c`BjK
void init(int[] data){ 3b%y+?-{\u
this.queue=new int[data.length+1]; W=F?+KgL
for(int i=0;i queue[++size]=data; [0)iY%^
fixUp(size); eYsO%y\I
} >OiC].1
} ?;^_%XSQ*
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private int size=0; zg8m(=k'
IXd&$h]Lq
private int[] queue; NbkWy
|$bZO`^
public int get() { |6_<4lmTxF
return queue[1]; pjbKMx
} @jwUH8g1
6 D!,vu
public void remove() { ;]<$p[m
SortUtil.swap(queue,1,size--); Kpj0IfC,10
fixDown(1); d*q_DV
} li/O&@g`
file://fixdown D}b+#G(m[
private void fixDown(int k) { eN}FBX#'
int j; 9W'#4
while ((j = k << 1) <= size) { .lTGFeJqZ4
if (j < size %26amp;%26amp; queue[j] j++; hr]NW>;
if (queue[k]>queue[j]) file://不用交换 1iF |t5>e
break; WGp81DNS|
SortUtil.swap(queue,j,k); 0m*0I>
k = j; *pI3"_
} 2"V?+Hhz
} $9Z8P_^.0(
private void fixUp(int k) { eDTEy;^o
while (k > 1) { eZP"M6
int j = k >> 1; EkXns%][L
if (queue[j]>queue[k]) (qB$I\
break; QdDdrR^&
SortUtil.swap(queue,j,k); 8iX?4qj{P
k = j; N15{7,
} ,JVD ;u
} }\l5|Ft[!
QD"V=}'?
} Q@]#fW\Y
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} ,`-6!|:
4(B,aU>y
SortUtil： 2psI\7UjA]
m$[\(Z(/
package org.rut.util.algorithm; Fnll&TF
|q5\1}@:
import org.rut.util.algorithm.support.BubbleSort; ??1V__w
import org.rut.util.algorithm.support.HeapSort; aEX+M57k~
import org.rut.util.algorithm.support.ImprovedMergeSort; ?CmW{9O
import org.rut.util.algorithm.support.ImprovedQuickSort; _Vp9Y:mX2
import org.rut.util.algorithm.support.InsertSort; G]q6Ika
import org.rut.util.algorithm.support.MergeSort; ~>#=$#V
import org.rut.util.algorithm.support.QuickSort; :Q&8DC#]
import org.rut.util.algorithm.support.SelectionSort; J0|/g2%0
import org.rut.util.algorithm.support.ShellSort; q/%f2U%4:
.&}}ro48
/** sfVtYIu
* @author treeroot 8 wC3}U
* @since 2006-2-2 pN%L3?2
* @version 1.0 >rYP}k
*/ ,gkxZ{Eh
public class SortUtil { h-jea1m
public final static int INSERT = 1; G4<'G c
public final static int BUBBLE = 2; ;QgJw2G
public final static int SELECTION = 3; =b9?r
public final static int SHELL = 4; wU+ofj; +I
public final static int QUICK = 5; !;iySRZr
public final static int IMPROVED_QUICK = 6; skZxR5v3~L
public final static int MERGE = 7; WnHf)(J`"
public final static int IMPROVED_MERGE = 8; \[Rh\v&
public final static int HEAP = 9; cB?HMLbG>
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public static void sort(int[] data) { Dc BTW+
sort(data, IMPROVED_QUICK); PiAA,
} p^~lQ8t
private static String[] name={ !:e}d+F
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +J+]P\:
}; X}Fc0Oo
tlvLbP*r
private static Sort[] impl=new Sort[]{ r6MQ|@
new InsertSort(), M@{GT/`Pf
new BubbleSort(), O]lWaiR`
new SelectionSort(), Q[8L='E
new ShellSort(), n*bbmG1
new QuickSort(), KvktC|~?
new ImprovedQuickSort(), GH^i,88
new MergeSort(), PTL52+}/
new ImprovedMergeSort(), PtmdUHvD
new HeapSort() htMpL
}; ]km8M^P
(x?A#o>%
public static String toString(int algorithm){ T#er5WOH
return name[algorithm-1]; lR;<6
} 1 ht4LRFi
nm\n\j~
public static void sort(int[] data, int algorithm) { xNq&_oY7
impl[algorithm-1].sort(data); F/@#yQv?
} ~u}[VP
wm@1jLjrQ
public static interface Sort { WWq)CwR
public void sort(int[] data); #2x\d
} ~Bj-n6QDE
\? MuORg
public static void swap(int[] data, int i, int j) { eFZ`0V0
int temp = data; f9OVylm
data = data[j]; (:E^} &A
data[j] = temp; Jq?ai8
} Ep?a1&b
} ^HC! my