[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; ,<#Rk'y$
} ys`oHSf
int i1=l; 3T0-RP*
int i2=mid+1; iEr?s-or
for(int cur=l;cur<=r;cur++){ ilJ`_QN
if(i1==mid+1) g~.#.S ds
data[cur]=temp[i2++]; *<67h*|)
else if(i2>r) r5nHYV&7
data[cur]=temp[i1++]; V,Nu!$)J
else if(temp[i1] data[cur]=temp[i1++]; wL, -"
else <7rj,O1=
data[cur]=temp[i2++]; =$gBWS
} ^W:a7cMw
} : Bo
:n{{\SSIgX
} ~MH^R1=]
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改进后的归并排序: ^zO{Aks
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package org.rut.util.algorithm.support; 9U.Ctx:F
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import org.rut.util.algorithm.SortUtil; 2AhfQ%Y=
&@CUxK
/** wn.6l `
* @author treeroot Xy K,
* @since 2006-2-2 kw2yb
* @version 1.0 m^qFaf)6
*/ .0xk},
public class ImprovedMergeSort implements SortUtil.Sort { 3fQ`}OcNr
}cCIYt\RK
private static final int THRESHOLD = 10; &Lt$~}*&6
tl!dRV92
/* P%l?C?L
* (non-Javadoc) PcT]
* `f&::>5tD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a*X{hU9P
*/ =0EKrG
public void sort(int[] data) { O9By5j 4
int[] temp=new int[data.length]; VPT?z
mergeSort(data,temp,0,data.length-1); SZrc-f_
} ^ }5KM87
80Fa i
private void mergeSort(int[] data, int[] temp, int l, int r) { \yw5`5g
int i, j, k; \C>IVz<O
int mid = (l + r) / 2; ;K8}Yq9p9
if (l == r) rm3/R<
return; {X?1}5ry
if ((mid - l) >= THRESHOLD) !<~.>5UQ
mergeSort(data, temp, l, mid); + <E zv
else :ZB.I(v
insertSort(data, l, mid - l + 1); `{>/'o
if ((r - mid) > THRESHOLD) `|AH3v1
mergeSort(data, temp, mid + 1, r); 3]JJCaf
else ."BXA8c;A
insertSort(data, mid + 1, r - mid); juF=ZW%i
5&EBUl}
for (i = l; i <= mid; i++) { 3$YbEl@#
temp = data; 0<@['W}G
} ,T zlW\?\
for (j = 1; j <= r - mid; j++) { I|&DXF
temp[r - j + 1] = data[j + mid]; T|BlFJ0"
} -A<@Pg
int a = temp[l]; 7"aN7Q+EbI
int b = temp[r]; A+dx7anUz
for (i = l, j = r, k = l; k <= r; k++) { @#W4?L*D
if (a < b) { _)= e`9%
data[k] = temp[i++]; mCg^Y)Q
a = temp; 'bM=
} else { aLm~.@Q
data[k] = temp[j--]; kBC$dW-
b = temp[j]; ySiZ@i4
} Y(1?uVYW\d
} &)tv4L&
} ,GVX1B?
l%mp49<
/** xL.m<XDL
* @param data #Ox@[Z1I
* @param l Pb T2- F_
* @param i @o?Y[BR
*/ V1d#7rP
private void insertSort(int[] data, int start, int len) { ?b(wZ-/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); PbvA~gm
} fOSk> gK
} ]C"?xy
} 9"S iHp\)
} e&i`/m5
f!YlYk5
堆排序： &P}t<;
|+HJ>xA4I
package org.rut.util.algorithm.support; 7z3tDE[#
fCY??su*
import org.rut.util.algorithm.SortUtil; "dt}k$Gr
3p HI+a
/** ?nL,Otz
* @author treeroot L58H)V3Pn
* @since 2006-2-2 5p~5-_JX
* @version 1.0 p JF 9Z
*/ _>`9]6\&
public class HeapSort implements SortUtil.Sort{ @,,G]4zZ!
xWY\,'+Q
/* (non-Javadoc) kGnT4R*E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1CZO+MB&"$
*/ d42Y`Wu
public void sort(int[] data) { zq$L[X
MaxHeap h=new MaxHeap(); +\ "NPK@3
h.init(data); .7Yox1,
for(int i=0;i h.remove(); 5({_2meJ:
System.arraycopy(h.queue,1,data,0,data.length); @IbZci)1
} H6nH
Y$,~"$su|
private static class MaxHeap{ v36Z*I6)5
x4LPrF1
void init(int[] data){ ^b5+A6?
this.queue=new int[data.length+1]; Io IhQ
for(int i=0;i queue[++size]=data; G^h:#T
fixUp(size); g^|R;s{
} v8C($<3%
} k_u!E3{~
7uw-1F5x7
private int size=0; Z6Mjc/
W)f=\.7
private int[] queue; vmNI$KZM
b5%<},ySq
public int get() { l0t(t*[Mj
return queue[1]; l*wGKg"x3
} I<<1mEk
*K?UWi#$
public void remove() { d:A'|;']
SortUtil.swap(queue,1,size--); 2x|FVp
fixDown(1); 5"b1: w@
} cQd?,B3#F
file://fixdown *v8daF
private void fixDown(int k) { sxuP"4
int j; &|'yqzS3
while ((j = k << 1) <= size) { Mby4(M+&n
if (j < size %26amp;%26amp; queue[j] j++; uR2|>m
if (queue[k]>queue[j]) file://不用交换 ^uw]/H3?L
break; s"$K2k;J
SortUtil.swap(queue,j,k); 8"d??3ZXJ
k = j; 54WX#/<Yik
} ,S(Z\[x0
} -Mrt%1g
private void fixUp(int k) { $Q'LDmot
while (k > 1) { Jh%SenP_oP
int j = k >> 1; 9o?\*{'KT
if (queue[j]>queue[k]) pQ^V<6z}
break; ct,;V/Dx
SortUtil.swap(queue,j,k); F}[!OYyg
k = j; B9 ?58v&
} O.y ?q
} )@Y< <9'2
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} nW\W<[O9
"|&3z/AUh
} Hiwij,1
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SortUtil： v/~&n
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package org.rut.util.algorithm; "G*$#
S"^'ksL\
import org.rut.util.algorithm.support.BubbleSort; jd5kkX8=
import org.rut.util.algorithm.support.HeapSort; }#&[[}@th
import org.rut.util.algorithm.support.ImprovedMergeSort; 9qGba=}Ey
import org.rut.util.algorithm.support.ImprovedQuickSort; :,$"Gk
import org.rut.util.algorithm.support.InsertSort; E^{!B]/oP
import org.rut.util.algorithm.support.MergeSort; *+6iXMwe
import org.rut.util.algorithm.support.QuickSort; Zi\ex\ )5
import org.rut.util.algorithm.support.SelectionSort; >y#qn9rV1
import org.rut.util.algorithm.support.ShellSort; pih 0ME}z
r.Z g<T
/** e9Gu`$K
* @author treeroot ?+Vi !eS
* @since 2006-2-2 RZnmia
* @version 1.0 ]D,_<Kk
*/ u+6D|
public class SortUtil { KC:6^h'.
public final static int INSERT = 1; sHPeAa22
public final static int BUBBLE = 2; 2g_mQT
public final static int SELECTION = 3; 74 )G.!
public final static int SHELL = 4; Tu}EAr
public final static int QUICK = 5; =\)zb'\=d
public final static int IMPROVED_QUICK = 6; };P=|t(r
public final static int MERGE = 7; e~'z;%O~
public final static int IMPROVED_MERGE = 8; "dOQ)<;
public final static int HEAP = 9; d2U?rw_
/ET+`=n
public static void sort(int[] data) { LH_U#P`E
sort(data, IMPROVED_QUICK); 1.8"N&s
} |)&d9|]
private static String[] name={ 5{DwD{Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -U_,RMw~
}; ~g#/q~UE
d9jD?HgM(
private static Sort[] impl=new Sort[]{ sy4Nm0m
new InsertSort(), HFyQ$pbBU
new BubbleSort(), !OPHS^L
new SelectionSort(), %yfl-c(u
new ShellSort(), b *0uxvLu
new QuickSort(), #< :`:@2
new ImprovedQuickSort(), Ii/{xVMD
new MergeSort(), -h ^MX
new ImprovedMergeSort(), \4<|QE
new HeapSort() rp1+K4]P
}; >XiT[Ru
2w+4B4
public static String toString(int algorithm){ s?9Y3]&+&M
return name[algorithm-1]; c\ZnGI\|
} Hdd3n6*
'?_~{\9<
public static void sort(int[] data, int algorithm) { gzW{h0iRr
impl[algorithm-1].sort(data); 8*B+@`
} |tLD^`bt
3q@JhB
public static interface Sort { (ToD u@p
public void sort(int[] data); lS p"(&
} Fe: ~M?]
F)imeu
public static void swap(int[] data, int i, int j) { (@^ySiU
int temp = data; H;tE=
data = data[j]; \K%M.>]vq
data[j] = temp; 1L7^g*
} y[AB,Dd
} uD{ xs