[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; m>jX4D7KZ
} {.DI[@.g
int i1=l; Xo;J1H
int i2=mid+1; [P`Q_L,+
for(int cur=l;cur<=r;cur++){ Yk6fr~b
if(i1==mid+1) 's(0>i
data[cur]=temp[i2++]; <~<I K=n
else if(i2>r) aG?'F`UQ
data[cur]=temp[i1++]; E_/v$
else if(temp[i1] data[cur]=temp[i1++]; rM/*_0[`d
else 6P3ezl@#;
data[cur]=temp[i2++]; 0`3ey*
} p%G4Js.
} *<OWd'LI
f@Hp,-
} M%1-fd
?so3Kj6H
改进后的归并排序: )p).}"
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package org.rut.util.algorithm.support; mAX]m1s
Yono8M;9*
import org.rut.util.algorithm.SortUtil; pzCD' !*
uZW ?0W
/** U]@t\T3W
* @author treeroot 4Q,HhqV'
* @since 2006-2-2 nZ$,Bjb
* @version 1.0 iEsI
*/ 8n,i5>!d
public class ImprovedMergeSort implements SortUtil.Sort { I^qk`5w
/1gKc}rB2
private static final int THRESHOLD = 10; 7=6p
ec)G~?FH
/* I,l%6oPa
* (non-Javadoc) \4bma<~a
* iShB^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0/#XUX 4
*/ "mSDL:$
public void sort(int[] data) { d&n0:xOc
int[] temp=new int[data.length]; +[zrU`!@
mergeSort(data,temp,0,data.length-1); #Z"N\49
} Z8}Zhe.
9 %,_G.
private void mergeSort(int[] data, int[] temp, int l, int r) { `Z{; c
int i, j, k; I`5F&8J{
int mid = (l + r) / 2; L`V6\Ix(I
if (l == r) o`DBzC
return; i/,G=yA
if ((mid - l) >= THRESHOLD) VX[{X8PkS
mergeSort(data, temp, l, mid); ? Ls]k
else 3|[:8
insertSort(data, l, mid - l + 1); P(VQD>G
if ((r - mid) > THRESHOLD) >6@*%LM
mergeSort(data, temp, mid + 1, r); "a?k #!E
else 6T;C+Y$
insertSort(data, mid + 1, r - mid); lF8B+
Ra;e#)7X
for (i = l; i <= mid; i++) { SrN0f0
temp = data; #OJsu
} \Nb6E&+
for (j = 1; j <= r - mid; j++) { i5(_.1X<#{
temp[r - j + 1] = data[j + mid]; 6K[s),rdv
} '4L i
int a = temp[l]; ?P4`
int b = temp[r]; +G7A.d`V}
for (i = l, j = r, k = l; k <= r; k++) { Y=vA;BE]R
if (a < b) { dWg$yH
data[k] = temp[i++]; YzhZ%:8
a = temp; "sUe:F;
} else { '355Pce/
data[k] = temp[j--]; ?$Uk[
b = temp[j]; <$Q&n{
} TAi |]U!
} H-1@z$p
} aS'G&(_
$B2* x$
/** -XPGl
* @param data ^NHQ[4I
* @param l Q'7o_[o/
* @param i .J&NM(qeZ
*/ {SqY77
private void insertSort(int[] data, int start, int len) { CImB,AXS
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A^3cP, L
} [\@!~F{
} YZr^;jfP
} b1\z&IdC
} QEQ8gfN9>
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堆排序： q.K >v'
]^8:"Ky'
package org.rut.util.algorithm.support; ky#<\K1}'
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import org.rut.util.algorithm.SortUtil; ^Ac0#oX]M
pZlBpGQf
/** %vxd($Ti"
* @author treeroot 1Q#hanh_`
* @since 2006-2-2 ?9Fv0-g&n
* @version 1.0 _&19OD%
*/ l1gAm#
public class HeapSort implements SortUtil.Sort{ FT[wa-b
U5dJ=G
/* (non-Javadoc) y!blp>V6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CW*6 -q
*/ T~ /Bf
public void sort(int[] data) { j<8_SD=,
MaxHeap h=new MaxHeap(); uvc0"g1h
h.init(data); C/<fR:`c
for(int i=0;i h.remove(); v srce
System.arraycopy(h.queue,1,data,0,data.length); o!sxfJKl
} m-, '
gS4K](KH |
private static class MaxHeap{ O JvEq@
$daI++v`
void init(int[] data){ KD-0NO=oL
this.queue=new int[data.length+1]; AJCWp4,
for(int i=0;i queue[++size]=data; X H{5E4P
fixUp(size); ,y:q]PR
} yoGE#+|7^
} vQc>jmS+n
]9R?2{"K
private int size=0; K~x G+Kh
5c'rnMW4+p
private int[] queue; jM2gu~
oJ{)0;<~L
public int get() { Z TjlGU `
return queue[1]; &y3_>!L
} ]A<\d
o~mY,7@a
public void remove() { &XrF#s
SortUtil.swap(queue,1,size--); ;6fkG/T
fixDown(1); ds5<4SLj
} w?oIKj
file://fixdown }gag?yQ.^
private void fixDown(int k) { +&(sZFW5o
int j; _ky!4^B
while ((j = k << 1) <= size) { <ywxz1i
if (j < size %26amp;%26amp; queue[j] j++; IB(IiF5
if (queue[k]>queue[j]) file://不用交换 6CY_8/:zL
break; zT!JHG
SortUtil.swap(queue,j,k); c6BaC@2
k = j; hCW8(Zt
} G]QD6b9~
} J[VQ6fD%
private void fixUp(int k) { Z|'tw^0e5
while (k > 1) { i+21tG$
int j = k >> 1; SV6Np?U
if (queue[j]>queue[k]) =qIJXV
break; FIC 2)
SortUtil.swap(queue,j,k); Zt[ PkBi
k = j; M~ynJ@q
} +es.V /
} 0sV;TQt+f
rb`C:#j{J
} xQWZk`6~L
`4\H'p
} ]#3=GFs/
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SortUtil： -_b}b)2iYN
42Kzdo|}
package org.rut.util.algorithm; @105 @9F
CIO&VK
import org.rut.util.algorithm.support.BubbleSort; `lcpUWn
import org.rut.util.algorithm.support.HeapSort; ZuBVq
import org.rut.util.algorithm.support.ImprovedMergeSort; 89'nbg
import org.rut.util.algorithm.support.ImprovedQuickSort; <Ni]\-*
import org.rut.util.algorithm.support.InsertSort; }{j[
import org.rut.util.algorithm.support.MergeSort; 47ir QK*
import org.rut.util.algorithm.support.QuickSort; =]Qu"nRB
import org.rut.util.algorithm.support.SelectionSort; W?XvVPB
import org.rut.util.algorithm.support.ShellSort; &qrH
R:^GNra;
/** G>*s+
* @author treeroot 1eiH%{w
* @since 2006-2-2 i]9SCO
* @version 1.0 Hr96sN.R
*/ )|Y"^K%Jm
public class SortUtil { 7CrWsQl u
public final static int INSERT = 1; ==UH)o`?8
public final static int BUBBLE = 2; ;rd!kFd#bq
public final static int SELECTION = 3; x<9|t(
public final static int SHELL = 4; )Cu"M#`
public final static int QUICK = 5; 0o`0Td
public final static int IMPROVED_QUICK = 6; TtkB
public final static int MERGE = 7; H'Z[3e
public final static int IMPROVED_MERGE = 8; jr~76
public final static int HEAP = 9; !C#q
i1|-
public static void sort(int[] data) { NpH)K:$#%
sort(data, IMPROVED_QUICK); ;uR8pz e
} G}}oeS
private static String[] name={ F?5kl/("
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3smcCQA%
}; Z#"6&kv
.`xcR]PQ
private static Sort[] impl=new Sort[]{ >q[Elz=dI
new InsertSort(), K _O3DcQ
new BubbleSort(), #l8CUg~Uj
new SelectionSort(), 9Tjvc!4_b
new ShellSort(), BXyZn0k
new QuickSort(), pS0-<-\R
new ImprovedQuickSort(), aViJ?*
new MergeSort(), h1JG^w$ 5
new ImprovedMergeSort(), @36^4E>h
new HeapSort() M7!&gFv8
}; (w"zI!
d3^LalAp
public static String toString(int algorithm){ y~p7&^FeR
return name[algorithm-1]; F}i rCi47c
} !Y`nKC(=z
36&7J{MU
public static void sort(int[] data, int algorithm) { @: %}clZ
impl[algorithm-1].sort(data); tEBf2|<
} YR~g&E#U^
!Bu<6
public static interface Sort { ,ulTZV
public void sort(int[] data); KC8A22
} CaZEU(i
~>s^/`|?
public static void swap(int[] data, int i, int j) { J"FKd3~:E
int temp = data; \p [!@d^
data = data[j]; *R1x^t+)
data[j] = temp; 2ORWdR.b
} o"QpV >x
} SZvw>=)a