[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; ;2&(]1X
} o2Z# 5-
int i1=l; "rkP@ja9n
int i2=mid+1; [t?ftS
for(int cur=l;cur<=r;cur++){ !9V_U
if(i1==mid+1) M|76,2u
data[cur]=temp[i2++]; =X>?Y,
else if(i2>r) B \[P/AC
data[cur]=temp[i1++]; 5qUyOkI
else if(temp[i1] data[cur]=temp[i1++]; c 8E&
else vE&
data[cur]=temp[i2++]; ?1?m4i
} T4w`I;&v
} ? NVN&zD]
pGUrYik4
} C2bN<K
W!+5}\?
改进后的归并排序: z)Bc91A
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package org.rut.util.algorithm.support; Q- j+#NGc
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import org.rut.util.algorithm.SortUtil; `"/@LUso
6Pd;I,k
/** 'KM@$2tK^q
* @author treeroot e|xRK?aVBu
* @since 2006-2-2 r@k&1*&
* @version 1.0 hb[K.`g
*/ %0=|WnF-
public class ImprovedMergeSort implements SortUtil.Sort { }0c'hWMZ}
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private static final int THRESHOLD = 10; F&I^bkvh
# l}Y1^PDd
/* Y+j|T`d
* (non-Javadoc) QnVYZUgJeV
* \vojF\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \%rX~UhZ=
*/ &o:wSe
public void sort(int[] data) { sIg{a(1/
int[] temp=new int[data.length]; q[7C,o>/
mergeSort(data,temp,0,data.length-1); zjB8~ku#
} dN;C-XF3s
iv:[]o
private void mergeSort(int[] data, int[] temp, int l, int r) { 6YYZ S2
int i, j, k; =d&
int mid = (l + r) / 2; ANi}q9SC
if (l == r) qp'HRh@P2:
return; ocGqXDg3
if ((mid - l) >= THRESHOLD) W 4~a`D7
mergeSort(data, temp, l, mid); n:Ka@
else 29 ')Y|$,
insertSort(data, l, mid - l + 1); Lk=f^qJ ]
if ((r - mid) > THRESHOLD) aJK8G,Vk
mergeSort(data, temp, mid + 1, r); jh2D9h
else ')+'m1N
insertSort(data, mid + 1, r - mid); B]0`b1t
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for (i = l; i <= mid; i++) { !&?(ty^F
temp = data; @My-O@C>
} op/|&H'
for (j = 1; j <= r - mid; j++) { `epO/Uu\~u
temp[r - j + 1] = data[j + mid]; ~ex1,J*}t
} E0Ig/ j
int a = temp[l]; {3@/@jO?
int b = temp[r]; Gpo(Zf?
for (i = l, j = r, k = l; k <= r; k++) { $hn#T#J3
if (a < b) { 4*G#fW-
data[k] = temp[i++]; Mp}aJzmkB;
a = temp; {!Jw+LPv$$
} else { ,o*x\jrGw
data[k] = temp[j--]; vRYfB{~
b = temp[j]; *Xn{{
} *oKc4S+
} b~WiE?
} bK<'J=#1
Mb"i}Yt{
/** J*5)g
* @param data m ['UV2
* @param l \Om.pOz
* @param i Nu<M~/
*/ nV@k}IJg:?
private void insertSort(int[] data, int start, int len) { @y2{LUJe
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >5'C<jc C
} O#sDZ.EL
} G?#f@N0.5p
} U#G0
} bb}|"m.
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堆排序： DUFfk6#X}
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package org.rut.util.algorithm.support; M]vcW
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import org.rut.util.algorithm.SortUtil; L$=6R3GI
wG ua"@IE
/** 4w<U%57
* @author treeroot f]jAa?d T&
* @since 2006-2-2 6X$]d^)h{
* @version 1.0 Oc}4`?oy<O
*/ h2QoBGL5
public class HeapSort implements SortUtil.Sort{ @6~r7/WD
+Vl\lL -
/* (non-Javadoc) :&S6AP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G\@uj>Z
*/ <]2X~+v
public void sort(int[] data) { 96fbMP+7R
MaxHeap h=new MaxHeap(); 6F(;=iY8
h.init(data); ?suxoP%
for(int i=0;i h.remove(); /5b,&
System.arraycopy(h.queue,1,data,0,data.length); :*4b,P
} PJ5~,4H-4
vR[XbsNM
private static class MaxHeap{ Y`eUWCD
(J I4ibP
void init(int[] data){ 2f2Vy:&O_
this.queue=new int[data.length+1]; p%/Z
for(int i=0;i queue[++size]=data; LZG?M|(6D
fixUp(size); _lcx?IV
} ^`XQ>-wWue
} 3x@t7B
omisfu_~E
private int size=0; b1>zGC^|
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private int[] queue; {ss^L
C@3a/<6m
public int get() { _r@ FWUZ
return queue[1]; !VBl/ aU@
} X,DG2HT
7jPPN
public void remove() { #;4<dDVy
SortUtil.swap(queue,1,size--); D"UCe7
fixDown(1); [CTE"@A
} 2#%@j6
file://fixdown >1q W*
private void fixDown(int k) { 'M8wjU
int j; xn|M]E1)
while ((j = k << 1) <= size) { "ld4v+o8l
if (j < size %26amp;%26amp; queue[j] j++; u*u3<YQ
if (queue[k]>queue[j]) file://不用交换 m?G@#[ l
break; sl?> X)}
SortUtil.swap(queue,j,k); ,/*L|M/&5
k = j; }22h)){n#Y
} PWUS@I
} 82d~>i%T
private void fixUp(int k) { b/"&E'5-`\
while (k > 1) { Y<0}z>^
int j = k >> 1; /&1FgSARK
if (queue[j]>queue[k]) H%y!lR{c^D
break; %{"v^4
SortUtil.swap(queue,j,k); )zn`qaHK@e
k = j; ~gZ"8frl
} CNU,\>J@$
} 2aj9:S
W@S>#3,
} Lh`B5
3'3E:}o|
} ^phgNzD
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SortUtil： DD$YMM
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package org.rut.util.algorithm; e"g=A=S
f)'mpp^
import org.rut.util.algorithm.support.BubbleSort; -]hk2Q0
import org.rut.util.algorithm.support.HeapSort; KNvvYwFH]
import org.rut.util.algorithm.support.ImprovedMergeSort; 9feVy\u
import org.rut.util.algorithm.support.ImprovedQuickSort; 4gKu8G
import org.rut.util.algorithm.support.InsertSort; dbVMG-z8
import org.rut.util.algorithm.support.MergeSort; R"Ff(1m
import org.rut.util.algorithm.support.QuickSort; J]mG!#9
import org.rut.util.algorithm.support.SelectionSort; YL[n85l>1
import org.rut.util.algorithm.support.ShellSort; ^\"@r%|
>G#SfE$0
/** 9Su4nt`i
* @author treeroot OS- Xh-:z
* @since 2006-2-2 <A~a|A-QFR
* @version 1.0 Q3h_4{w
*/ YmwUl>@{
public class SortUtil { "/ 9EUbca
public final static int INSERT = 1; IJ[r!&PY
public final static int BUBBLE = 2; u$M,&Om
public final static int SELECTION = 3; pHNo1-k\
public final static int SHELL = 4; xa"8"8
public final static int QUICK = 5; ),!1B%
public final static int IMPROVED_QUICK = 6; .dwy+BzS
public final static int MERGE = 7; NP#6'eH\
public final static int IMPROVED_MERGE = 8; f$y`tT %o
public final static int HEAP = 9; F9}jiCom
NoAgZ{))
public static void sort(int[] data) { D,hZVKa
sort(data, IMPROVED_QUICK); dilom#2l
} WPu-P
private static String[] name={ 7$zeRYD+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4it^-M
}; ' pN[H\Ia
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private static Sort[] impl=new Sort[]{ C0`Bi:Ze
new InsertSort(), L^E#"f
new BubbleSort(), d YliC
new SelectionSort(), m8ApiGG
new ShellSort(), Gv(?u
new QuickSort(), fHV%.25
new ImprovedQuickSort(), UE\Z]t!
new MergeSort(), t@vVE{`
new ImprovedMergeSort(), UURYK~$K:
new HeapSort() ZZ*+Tl\ s
}; G^%FP!'D?
`k;MGs)&
public static String toString(int algorithm){ 6"djX47j
return name[algorithm-1]; Y n7z#bu
} umo<9Y
N|5fkx<d^
public static void sort(int[] data, int algorithm) { S.,5vI"s,
impl[algorithm-1].sort(data); y>! 8mDvZ
} ascY E
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public static interface Sort { =pk5'hBAi
public void sort(int[] data); Fm#`}K_
} YwizA}a#
dTrz7ayH
public static void swap(int[] data, int i, int j) { T B(K&3_D
int temp = data; %y|L'C,ge"
data = data[j]; 4Q17vCC*n
data[j] = temp; r "uQ|
} MU>6s`6O
} IQ\5!e