[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; 78 w
} U9ZuD40\
int i1=l; EugRC
int i2=mid+1; tr5j<O
for(int cur=l;cur<=r;cur++){ SRtw
if(i1==mid+1) k".kbwcaF
data[cur]=temp[i2++]; uNkJe
else if(i2>r) lJ]]FuA-Q
data[cur]=temp[i1++]; zYrJHn#vB
else if(temp[i1] data[cur]=temp[i1++]; qA;Gl"HF
else uu9IUqEq2
data[cur]=temp[i2++]; (\D E1q
} =A!rZG
} ta6>St7.
Gx %=&O
} (dZ]j){
RL:B.Lv/W
改进后的归并排序: O6/:J#X%
$ay!'MK0d
package org.rut.util.algorithm.support; oYdE s&qq
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import org.rut.util.algorithm.SortUtil; Lb)rloca
6DU~6c=)
/** _p>F43%p
* @author treeroot ,-hbwd~M
* @since 2006-2-2 &r.M~k >
* @version 1.0 99.F'Gz
*/ Vpne-PW
public class ImprovedMergeSort implements SortUtil.Sort { w >2sr^!y
8\"Gs z
private static final int THRESHOLD = 10; obE8iG@H
}zks@7kf
/* @R}3f6@67
* (non-Javadoc) |_+#&x
* <#J5.I 1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OLPY<ax
*/ $[}EV(#y
public void sort(int[] data) { PW|=IPS
int[] temp=new int[data.length]; k_{?{:X;y
mergeSort(data,temp,0,data.length-1); Fsm6gE`|n
} pU9.#O
;p2b^q'
private void mergeSort(int[] data, int[] temp, int l, int r) { WQ 2{`'z
int i, j, k; %YK xdp
int mid = (l + r) / 2; )=sbrCl,C/
if (l == r) =6qTz3t
return; ^GAJ9AF@(
if ((mid - l) >= THRESHOLD) d&CpaOSu
mergeSort(data, temp, l, mid); iMt3h8
else rrr_{d/
insertSort(data, l, mid - l + 1); d|oO2yzWv
if ((r - mid) > THRESHOLD) ]/kpEx
mergeSort(data, temp, mid + 1, r); i^e8.zgywF
else F|{uA/P{
insertSort(data, mid + 1, r - mid); 8q%y(e
"!D y[J
for (i = l; i <= mid; i++) { ^~I@]5Pq
temp = data; +}N'Xa/Jt
} t/Y0e#9,
for (j = 1; j <= r - mid; j++) { l_/(J)|a
temp[r - j + 1] = data[j + mid]; CvmIDRP*
} lyX3'0c
int a = temp[l]; Vi:^bv
int b = temp[r]; C+uW]]~I)
for (i = l, j = r, k = l; k <= r; k++) { .=9WY_@SZ
if (a < b) { :^PksR
data[k] = temp[i++]; );%H;X+x
a = temp; PWyf3
} else { ~x!up9
data[k] = temp[j--]; A$r$g\5+
b = temp[j]; qxb]UV,R
} MW6z&+Z
} DrKB;6
} H)i|?3Ip
#H w(w
/** iX6>u4~(
* @param data Vn4wk>b}$2
* @param l =V]0G,,\
* @param i 7dcR@v`c
*/ *s*Y uY%y
private void insertSort(int[] data, int start, int len) { ')!X1A{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Oo@o$\+v
} ^e_LnJ+
} chKK9SC+|
} / n_s"[I4
} -z~!%4a
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堆排序： iW^J>aKy
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package org.rut.util.algorithm.support; R__:~uv,
}1e4u{
import org.rut.util.algorithm.SortUtil; UPU$SZAIx
}VZExqm)
/** <M@-|K"Eb
* @author treeroot ey=KAt
* @since 2006-2-2 -1,0hmn=+
* @version 1.0 /V:9*C
*/ [K.1 X=O}
public class HeapSort implements SortUtil.Sort{ Q}|K29Y:p
,JE_aje7
/* (non-Javadoc) Q0Ft.b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X)[tb]U/Wx
*/ }a||@unr
public void sort(int[] data) { -p&u=
MaxHeap h=new MaxHeap(); d(o=)!p
h.init(data); A}SGw.3
for(int i=0;i h.remove(); 0o=HOCL\
System.arraycopy(h.queue,1,data,0,data.length); ^"X.aksA
} U_(>eVi7F
0SQr%:zG
private static class MaxHeap{ >Ua'*
^sD M>OHp
void init(int[] data){ 2Qp}f^
this.queue=new int[data.length+1]; %`yfi+e
for(int i=0;i queue[++size]=data; m+hI3@j
fixUp(size); k?14'X*7yu
} n(J>'Z
} RyJy%|\-S
xKG7d8=
private int size=0; );h(D!D,
3NgXM
private int[] queue; ^PTf8o
3&+dyhL'w
public int get() { Z5>~l
return queue[1]; D#b*M)X"
} 8x U*j
w'2FYe{wj
public void remove() { J+`aj8_B
SortUtil.swap(queue,1,size--); ixu*@{<Z(
fixDown(1); y|}~"^+T
} $]We|
file://fixdown #m.e9MU
private void fixDown(int k) { ^ ~Eh+
int j; F'Y ad
while ((j = k << 1) <= size) { cRVL1ne
if (j < size %26amp;%26amp; queue[j] j++; . ,^WCyvq
if (queue[k]>queue[j]) file://不用交换 y4Jc|)
break; I_ mus<sE
SortUtil.swap(queue,j,k); IC0L&;En
k = j; @gD)pH
} {*7MT}{(
} Ai< beUS
private void fixUp(int k) { |6*Bu1
while (k > 1) { Tu#;Y."T
int j = k >> 1; X ."z+-eh
if (queue[j]>queue[k]) = ^NvUrK
break; bV8+Eu
SortUtil.swap(queue,j,k); B`B=bn+4
k = j; \vAjg
} eBrNhE-[G]
} D*%am|QL
etr-\Cp
} b# N"}-\^
jmID@37t
} X_TjJmc
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SortUtil： ETdXk&AN
dH^6K0J
package org.rut.util.algorithm; KS$t
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import org.rut.util.algorithm.support.BubbleSort; K3?5bT_{
import org.rut.util.algorithm.support.HeapSort; gF{ehU%
import org.rut.util.algorithm.support.ImprovedMergeSort; $N=&D_Q
import org.rut.util.algorithm.support.ImprovedQuickSort; lGd'_~'=
import org.rut.util.algorithm.support.InsertSort; r)iEtT!p*
import org.rut.util.algorithm.support.MergeSort; uQ5h5Cfz
import org.rut.util.algorithm.support.QuickSort; -F~DOG%
import org.rut.util.algorithm.support.SelectionSort; ;5j|B|v
import org.rut.util.algorithm.support.ShellSort; %":3xj'EEI
IL].!9
/** Z+El(f x
* @author treeroot VL9wRu;
* @since 2006-2-2 {]HiTpn
* @version 1.0 _Op%H)
*/ &kg^g%%
public class SortUtil { NKO"'
public final static int INSERT = 1; }`"}eN @,
public final static int BUBBLE = 2; 0^ODJ7
public final static int SELECTION = 3; fu"cX;
public final static int SHELL = 4; :,l7e
public final static int QUICK = 5; a: "1LnvR
public final static int IMPROVED_QUICK = 6; SyvoN,;Q
public final static int MERGE = 7; PM\Ju]
public final static int IMPROVED_MERGE = 8; 0|P=S|%~
public final static int HEAP = 9; =0)|psCsM
mTE(JZt
public static void sort(int[] data) { (C!p2f
sort(data, IMPROVED_QUICK); V?u#WJy/
} aA`eKy) \
private static String[] name={ J2=4%#R!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l00i2w
}; b#6S8C+@
*G58t`]r
private static Sort[] impl=new Sort[]{ b>07t!;
new InsertSort(), f7=MgFi
new BubbleSort(), YXA@ c
new SelectionSort(), YN8x|DLi?
new ShellSort(), Mn0.!J "
new QuickSort(), 2)f_L|o,m
new ImprovedQuickSort(), _?c.m*)A
new MergeSort(), axC|,8~tq
new ImprovedMergeSort(), ,;g%/6X
new HeapSort() T2e-RR
}; mU/o%|h
*g(d}C!
public static String toString(int algorithm){ cbJgeif
return name[algorithm-1]; ]Z!Y*v
} #J[g r_
C`.YOkpj
public static void sort(int[] data, int algorithm) { nrl?<4_
impl[algorithm-1].sort(data); ,h*gd^i
} uavATnGO{B
AFAg3/
public static interface Sort { 4=yzf
public void sort(int[] data); .|,LBc!
} >tM4|w|
';I}6N
public static void swap(int[] data, int i, int j) { \"O5li3n
int temp = data; X=sE1RB
data = data[j]; W:r[o%B
data[j] = temp; A!lZyG!3
} K. ;ev
} UsE\p9mCuV