[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; sL,|+>7T^M
} -EP(/CS!
int i1=l; 0\Tp/Ph
int i2=mid+1; bB)$=7\
for(int cur=l;cur<=r;cur++){ >7r%k,`
if(i1==mid+1) #/5eQTBD
data[cur]=temp[i2++]; vdigw.=z
else if(i2>r) qHvU4v
data[cur]=temp[i1++]; i-?mghe8
else if(temp[i1] data[cur]=temp[i1++]; {<1uV']x
else 4 !m'9
data[cur]=temp[i2++]; 4I9Yr
} 2Bi?^kQ#
} @?RaU4e
}$[@*
} T\#Gc4
jrpki<D
改进后的归并排序: 8n["/5,
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package org.rut.util.algorithm.support; B6@q`Bmw.
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import org.rut.util.algorithm.SortUtil; iRx`Nx<@
0+&K;
/** hhz#IA6,
* @author treeroot ss6{+@,
* @since 2006-2-2 ky&wv+7
* @version 1.0 o_BRsJy
*/ u}P:9u&h6X
public class ImprovedMergeSort implements SortUtil.Sort { BLAF{vVaf
my/KsB
private static final int THRESHOLD = 10; FzykC
QNXoAx%I
/* _.E{>IFw
* (non-Javadoc) 9GsG*$-I
* f^KN8N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )~gIJW
*/ eeBW~_W
public void sort(int[] data) { gW<4E=fl
int[] temp=new int[data.length]; RF;[:[*W
mergeSort(data,temp,0,data.length-1); WX]O1Y
} EdTL]Xk
B_D0yhh
private void mergeSort(int[] data, int[] temp, int l, int r) { zeq")A
int i, j, k; @n=&muC}
int mid = (l + r) / 2; vvs2:87zvJ
if (l == r) 6=qC/1,l
return; X{(?p=]
if ((mid - l) >= THRESHOLD) MPKrr
mergeSort(data, temp, l, mid); )a5ON8?
else y4r?M8]"r
insertSort(data, l, mid - l + 1); !X||ds
if ((r - mid) > THRESHOLD) @eDs)mY
mergeSort(data, temp, mid + 1, r); 4GH&u,
else +XSe;xk;rD
insertSort(data, mid + 1, r - mid); aXzb]">
vxug>2
for (i = l; i <= mid; i++) { =qbN?a/?2
temp = data; sSc~q+xz
} `%^w-'
for (j = 1; j <= r - mid; j++) { C#8A|
temp[r - j + 1] = data[j + mid]; )\PX1198
} IuA4eDr^Y%
int a = temp[l]; |i~-,:/-Y
int b = temp[r]; @!j6y(@
for (i = l, j = r, k = l; k <= r; k++) { Z9MR"!0
if (a < b) { o4OB xHKy
data[k] = temp[i++]; {$5g29
a = temp; :>Bk^"
} else { gz~ug35
data[k] = temp[j--]; V;^N:I\js
b = temp[j]; q317~z_nl
} WW+F9~S
} XR3 dG:
} >I<}:=
I3b*sx$
/** uMpuS1
* @param data +IWf~|s
* @param l )Vrp<"v
* @param i ` AD}6O+x
*/ edCVIY'1
private void insertSort(int[] data, int start, int len) { %IE;'aa }
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B2*7H
} zGNW5S9G
} mlLqQ<
} 'n1$Y%t
} .{ZJywE<
J7C?Z
堆排序： HG< z,gE 2
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package org.rut.util.algorithm.support; C9!FnvH
`p1B58deC
import org.rut.util.algorithm.SortUtil; k Jw Pd;%
tN_=&|{WE4
/** tIV{uVM[|D
* @author treeroot =tY%`e
* @since 2006-2-2 lkly2|wA
* @version 1.0 BlZB8KI~
*/ ~c] q:pU2
public class HeapSort implements SortUtil.Sort{ r[T(R9k
_Pa@%/
/* (non-Javadoc) \jV2":[%c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a(*"r:/lD
*/ )f8;ze
public void sort(int[] data) { &j ;91wEn
MaxHeap h=new MaxHeap(); 7E#h(bt j
h.init(data); ^i2>Ax&T
for(int i=0;i h.remove(); EVBOubV
System.arraycopy(h.queue,1,data,0,data.length); evD=]iVD
} r$-P
JiO8EIM
private static class MaxHeap{ `HnZ{PKf
]Hq,Pr_+
void init(int[] data){ o8H\l\(
this.queue=new int[data.length+1]; u"%D;
for(int i=0;i queue[++size]=data; \ltS~EuWU
fixUp(size); \kf n,m
} mF!4*k
} <P ?gP1_zi
!fd>wvJ,:
private int size=0; 2<h~: L
`QRXQ c
private int[] queue; auX(d -m
bA2[=6
public int get() { "w0~f6o
return queue[1]; )E7wBNV
} L[<Y6u>m!1
F(Zf=$cx
public void remove() { iPY)Ew`Im
SortUtil.swap(queue,1,size--); ]dl.~;3~~
fixDown(1); "PWGtM:L8Y
} -P-8D6
file://fixdown 0u&x%c
private void fixDown(int k) { RRYcg{g
int j; ut]UU*g^$
while ((j = k << 1) <= size) { N!ay#V
if (j < size %26amp;%26amp; queue[j] j++; ,UC|[-J
if (queue[k]>queue[j]) file://不用交换 _Gt;=
break; i `p1e5$
SortUtil.swap(queue,j,k); +4Wl
k = j; m8x?`Gw~jw
} %K8YZc(&
} t6`(9o@}
private void fixUp(int k) { KF@%tR}V{
while (k > 1) { q4Bw5~n
int j = k >> 1; *?C8,;=2r
if (queue[j]>queue[k]) 4M|C>My
break; {06ClI
SortUtil.swap(queue,j,k); fF>hca>
k = j; i92Z`jiR
} Zn40NKYc
} t2.jg?`k
X(17ESQ/Y
} \6.dGKK
| 2<zYY
} WBJn1
.HGK 3
SortUtil： t5S|0/f
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package org.rut.util.algorithm; &'i>d&
sa/9r9hc+
import org.rut.util.algorithm.support.BubbleSort; 1M?x,N_W
import org.rut.util.algorithm.support.HeapSort; PY4a3dp U
import org.rut.util.algorithm.support.ImprovedMergeSort; {iq^CHAVK
import org.rut.util.algorithm.support.ImprovedQuickSort; Y*Ay=@z=y
import org.rut.util.algorithm.support.InsertSort; ",[/pb
import org.rut.util.algorithm.support.MergeSort; g`C"t3~%S
import org.rut.util.algorithm.support.QuickSort; =B'Yx
import org.rut.util.algorithm.support.SelectionSort; $G}k'[4C
import org.rut.util.algorithm.support.ShellSort; z#|Auc0
lX/7
/** hCc%d$wVk
* @author treeroot 9-&@Y
* @since 2006-2-2 TNeL%s?B3
* @version 1.0 @"98u$5
*/ C~K/yLCAi
public class SortUtil { qK@,O\
public final static int INSERT = 1; y?3u6q++
public final static int BUBBLE = 2; `('Up?
public final static int SELECTION = 3; Au/'|%2#(
public final static int SHELL = 4; \>EUa}%xn
public final static int QUICK = 5; P,F5Hf
public final static int IMPROVED_QUICK = 6; F.(e}EMyNh
public final static int MERGE = 7; n!~QC
public final static int IMPROVED_MERGE = 8; J|o<;9dg1
public final static int HEAP = 9; KyDd( 'i
q3-cWfU
public static void sort(int[] data) { }TuMMO4+
sort(data, IMPROVED_QUICK); 1rue+GL
} qPUACuF'
private static String[] name={ : 4lR`%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3BLHd<
}; t4~?m{
2v4&'C
private static Sort[] impl=new Sort[]{ 5^l-3s?M
new InsertSort(), e$Y7V
new BubbleSort(), RLLL=?W@
new SelectionSort(), tpeMq-
new ShellSort(), {- MhhRa5
new QuickSort(), @Xh8kvc81
new ImprovedQuickSort(), ,O^kZ}b
new MergeSort(), -)bu&
new ImprovedMergeSort(), (5y*Btd=
new HeapSort() A]o3MoSt
}; 8F)9.s,*
{\VsM#K6
public static String toString(int algorithm){ YY7dw:>e/
return name[algorithm-1]; i*09m^r
} ygQAA!&']
cZrJW
public static void sort(int[] data, int algorithm) { 4IM&#_6
impl[algorithm-1].sort(data); +, rm
} v] Xy^7?
6OQ\f,h@
public static interface Sort { h4ghMBo%
public void sort(int[] data); AI9=?X<kh
} -A:'D8o#f
Kl(u~/=6
public static void swap(int[] data, int i, int j) { ~aL?{kb+
int temp = data; Hb^ovc0
data = data[j]; mryT%zSlM
data[j] = temp; abEdZ)$
} z!~{3M
} }y*rO(cu7G