[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; oY\;KPz
} -G1R><8[
int i1=l; Uu`}| &@i
int i2=mid+1; !}eq~3
for(int cur=l;cur<=r;cur++){ M.$=tuUL
if(i1==mid+1) 925T#%y
data[cur]=temp[i2++]; 5}]gL
else if(i2>r) `]&'yt
data[cur]=temp[i1++]; "|WKK}
else if(temp[i1] data[cur]=temp[i1++]; d.>O`.Mu)}
else )C$Ij9<A
data[cur]=temp[i2++]; Py9:(fdS
} m KKa0"
} -&y&b-
UBuG12U4Y
} *MWI`=c
{Z$]Rj
改进后的归并排序: Tz(Dhb,
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package org.rut.util.algorithm.support; M;z )c|Z
.D=#HEshk
import org.rut.util.algorithm.SortUtil; b3=XWzK5
v9D[|4
/** c)QOgXv
* @author treeroot .?F`H[^)^u
* @since 2006-2-2 7pH[_]1"
* @version 1.0 A~a7/N6s;
*/ VM3)L>x]/
public class ImprovedMergeSort implements SortUtil.Sort { *:chN' <
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private static final int THRESHOLD = 10; Nc(A5*
+jGUp\h%9;
/* ]#rmk!VT?
* (non-Javadoc) ZI!;~q
* MLmk=&d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y=UN`vRR
*/ h9%.tGx
public void sort(int[] data) { 1(VskFtZF
int[] temp=new int[data.length]; z)&&Ym#
mergeSort(data,temp,0,data.length-1); ]V"B`ip[2
} Bo*Wm w
mndNkK5o
private void mergeSort(int[] data, int[] temp, int l, int r) { BQ~\p\
int i, j, k; ZN;fDv
int mid = (l + r) / 2; ;Ac!"_N?7
if (l == r) i+Xb3+R
return; jdD`C`w|,
if ((mid - l) >= THRESHOLD) I]~UOl
mergeSort(data, temp, l, mid); i:^ 8zW
else < $rXQ
insertSort(data, l, mid - l + 1); Wc/B_F?2
if ((r - mid) > THRESHOLD) Dd,]Y}P
mergeSort(data, temp, mid + 1, r); [4}U*\/>C
else e5sQl1
insertSort(data, mid + 1, r - mid); )|U+<r<
QJH~YV\%
for (i = l; i <= mid; i++) { IkLcL8P^
temp = data; E-#}.}i5
} lHgmljn5u
for (j = 1; j <= r - mid; j++) { L3C'q
temp[r - j + 1] = data[j + mid]; sGJZG
} )9rJ]D^B
int a = temp[l]; DM !B@
int b = temp[r]; Y#Pg*C8>8
for (i = l, j = r, k = l; k <= r; k++) { O/f+B}W
if (a < b) { Ar$Am
data[k] = temp[i++]; y-:d`>b>\
a = temp; (Mt-2+"+
} else { f@xjNm*'Z
data[k] = temp[j--]; &m@DK>
b = temp[j]; v}"DW?
} DIc -"5~
} Czd)AVK
} ^pvnUODW[
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/** ?w"zW6U
* @param data Cy\! H&0wg
* @param l &o)eRcwH`
* @param i WS ^%< h#
*/ ohB@ijC!
private void insertSort(int[] data, int start, int len) { ncij)7c)u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y)+lU
} jL#`CD
} ,y*|f0&"~
} DqBiBH[%h
} CF@j]I@{
hdH}4W
堆排序： ;XGO@*V5T
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package org.rut.util.algorithm.support; A>J,Bi
a.s5>:Ct
import org.rut.util.algorithm.SortUtil; T [2l32
(K|7T{B
/** _{YUWV50}
* @author treeroot .0'FW!;FV
* @since 2006-2-2 r/mKuGa]
* @version 1.0 `"qSr%|
*/ IpI|G!Y,
public class HeapSort implements SortUtil.Sort{ pu6@X7W"
@ M
/* (non-Javadoc) nK9?|@S*'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mvt%3zCB!
*/ W(,3j{d2i
public void sort(int[] data) { Bh<6J&<n
MaxHeap h=new MaxHeap(); {:c5/ ,7c;
h.init(data); jq12,R2+)
for(int i=0;i h.remove(); vAjvW&'g
System.arraycopy(h.queue,1,data,0,data.length); =2.q=a|'
} QL`Hb p
0hM!#BU5K
private static class MaxHeap{ R&]#@PW^
6k*,Yei
void init(int[] data){ )lrmP(C*.a
this.queue=new int[data.length+1]; :"I!$_E'
for(int i=0;i queue[++size]=data; TnQ"c)ta
fixUp(size); EK$3T5e
} j NkobJ1
} .I nDyKt
;HoBLxb P
private int size=0; 6#(==}Sm+
sA!$}W
private int[] queue; #l#8-m8g)
r: M>/Z/
public int get() { yttaZhK^u
return queue[1]; 6w)a.^yx7
} r6gfxW5
Gqs)E"h
public void remove() { SZ(]su:
SortUtil.swap(queue,1,size--); &r)[6a$fW
fixDown(1); z~(3S8$
} ]-"G:r
file://fixdown _T\cJcWf
private void fixDown(int k) { ;9$71E
int j; " `FcW
while ((j = k << 1) <= size) { TP{2q51yM
if (j < size %26amp;%26amp; queue[j] j++; +FJ+,|i
if (queue[k]>queue[j]) file://不用交换 w?:tce
break; (NC]S
SortUtil.swap(queue,j,k); IRyZ0$r:e\
k = j; H5>?{(m
} 7!U^?0?/
} yc+pNC)ue_
private void fixUp(int k) { vb`R+y@
while (k > 1) { R9\ )a2
int j = k >> 1; zd|n!3;
if (queue[j]>queue[k]) =~_
break; nM|Cv
SortUtil.swap(queue,j,k); L@s_)?x0
k = j; ?kdan
} Z0%:j\W4c
} [h63*&
.tcdqL-'
} uH]oHh!}j
c{ ([U
} rXP~k]tC
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SortUtil： 7YFEyX10d
\{ve6`7Rn
package org.rut.util.algorithm; #MFIsx)r
=M=v; ,I-
import org.rut.util.algorithm.support.BubbleSort; 8W Etm}
import org.rut.util.algorithm.support.HeapSort; :g~_
import org.rut.util.algorithm.support.ImprovedMergeSort; R*/s#*gmL
import org.rut.util.algorithm.support.ImprovedQuickSort; LU/;`In
import org.rut.util.algorithm.support.InsertSort; Wh)!Ha}
import org.rut.util.algorithm.support.MergeSort; f@[qS7ok
import org.rut.util.algorithm.support.QuickSort; R$X~d8o>%
import org.rut.util.algorithm.support.SelectionSort; +pRNrg?k
import org.rut.util.algorithm.support.ShellSort; A `{hKS
}OY/0p-Z
/** X,{ 3_
* @author treeroot +z4E:v
* @since 2006-2-2 &`oybm-p(
* @version 1.0 TV=K3F5)M
*/ McpQ7\*h
public class SortUtil { "VDMO^
public final static int INSERT = 1; Al=ByX@
public final static int BUBBLE = 2; B"8jEYT5
public final static int SELECTION = 3; T'{9!By,P
public final static int SHELL = 4; k%BU&%?1
public final static int QUICK = 5; .,20_<j%=
public final static int IMPROVED_QUICK = 6; 2+_a<5l~
public final static int MERGE = 7; ,l Y4WO
public final static int IMPROVED_MERGE = 8; Xv3pKf-K
public final static int HEAP = 9; TJ1h[
"9 f+F
public static void sort(int[] data) { "([/G?QAG
sort(data, IMPROVED_QUICK); h+ud[atk.
} tuLNGU
private static String[] name={ inip/&P?V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `/^ _W <
}; [Q+k2J_h
L7hRFf-o
private static Sort[] impl=new Sort[]{ G[1\5dK*uR
new InsertSort(), ?}uuTNLl)
new BubbleSort(), 7Ja*T@ !h
new SelectionSort(), ;tSAQ
new ShellSort(), j+@3.^vK
new QuickSort(), AJm$(3?/D
new ImprovedQuickSort(), 6tFi\,)E
new MergeSort(), =r*Ykd;W|E
new ImprovedMergeSort(), sQe GT)/|
new HeapSort() Ptf(p`
}; K_@?Q@#YhR
:AS`1\ C
public static String toString(int algorithm){ K8R>O *~
return name[algorithm-1]; -Caj>K
} &O^-,n
k/D{&(F ~
public static void sort(int[] data, int algorithm) { 5'c#pm\Q
impl[algorithm-1].sort(data); 4Y$\QZO
} aL%E#
|R1T;J<[
public static interface Sort { i[@13kr
public void sort(int[] data); k%FA:ms|k
} GX0zirz
n}j6gN!O
public static void swap(int[] data, int i, int j) { 9! /kyyU
int temp = data; Fj(GyPFG
data = data[j]; /0 4US5En
data[j] = temp; P:t .Nr"
} a eeor
} %4f.<gz~r|