[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; $R%xeih1fz
} 2Otd
int i1=l; W)ihk\E
int i2=mid+1; 2?58=i%b
for(int cur=l;cur<=r;cur++){ aErms-~
if(i1==mid+1) 4<)%Esyb
data[cur]=temp[i2++]; z;@;jQ7
else if(i2>r) pI|Lt
data[cur]=temp[i1++]; r4k=i4
else if(temp[i1] data[cur]=temp[i1++]; =0TnH<`
else mS5'q q;t
data[cur]=temp[i2++]; :2{6Pa(eg
} kG/:fP
} _>%P};G{>
RrRrB"!8nR
} N_lQz(nG/2
j1%o+#df
改进后的归并排序: d76k1-m\o
xGCW-YR9
package org.rut.util.algorithm.support; !*ct3{m
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import org.rut.util.algorithm.SortUtil; at]=SA
>{p&_u.r-
/** ,y>,?6:>
* @author treeroot I3]-$
* @since 2006-2-2 4eK!1|1
* @version 1.0 F0W4B
*/ :2iNw>z1
public class ImprovedMergeSort implements SortUtil.Sort { ~q4KQ&.!
%bgjJ`
private static final int THRESHOLD = 10; i,1=5@rw5
2W:R{dHE
/* VliX'.-
* (non-Javadoc) 0B#9CxU%
* %yX?4T;b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'd4I/
*/ xDv$z.=Y
public void sort(int[] data) { i"Hec9Ri
int[] temp=new int[data.length]; 1Y4=D
mergeSort(data,temp,0,data.length-1); u9My.u@-*%
} A(G%9'T
=B<>H$
private void mergeSort(int[] data, int[] temp, int l, int r) { `&2~\o/
int i, j, k; bD*V$w*P
int mid = (l + r) / 2; l{ja2brX
if (l == r) pQAG%i^mF
return; v7&oHOk!
if ((mid - l) >= THRESHOLD) VI7f}
mergeSort(data, temp, l, mid); NC'+-P'y
else 'NHtCs=F
insertSort(data, l, mid - l + 1); =NLsT.aa
if ((r - mid) > THRESHOLD) yH5^EY7rQ
mergeSort(data, temp, mid + 1, r); (T:OZmEO.
else Uyf<:8U\
insertSort(data, mid + 1, r - mid); P1KXvc}JGe
([SrIG>X
for (i = l; i <= mid; i++) { BH6)`0&2*N
temp = data; C4wJSQl_I
} S`g:zb_
for (j = 1; j <= r - mid; j++) { "&;8U.
temp[r - j + 1] = data[j + mid]; n "?It
} JLo'=(
int a = temp[l]; 4j^-n_T
int b = temp[r]; )a"rj5~-
for (i = l, j = r, k = l; k <= r; k++) { .XDY1~w0
if (a < b) { </! `m8\
data[k] = temp[i++]; 4g<F."
a = temp; `2N&{(
} else { ^*JpdmVhu
data[k] = temp[j--]; vM )2F
b = temp[j]; p|fSPSz
} D+edTAQ8
} ML@-@BaN
} aK>5r^7S
I3sH8/*
/** gwVfiXR4
* @param data !_EL{/ko
* @param l `q =e<$
* @param i Z3jh-{0
*/ =P'33) \ )
private void insertSort(int[] data, int start, int len) { l{q$[/J~)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?^y%UIzf
} N6K%Wkz
} u\LG_/UJV1
} GjTj..G/
} )Dn~e#
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堆排序： mBWE^
70pt5O3]
package org.rut.util.algorithm.support; :eIPPh|\
ybnq;0}$
import org.rut.util.algorithm.SortUtil; &"X6s%ZH|
fzcPi9+
/** 7C~qAI6Eg
* @author treeroot },1**_#<Br
* @since 2006-2-2 i>=d7'oR
* @version 1.0 rb8c^u#r
*/ ]MI>"hn
public class HeapSort implements SortUtil.Sort{ MV8Lk/zd?A
9J>b6
/* (non-Javadoc) ^Ej4^d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m ,B,dqT
*/ b _Q:v&
public void sort(int[] data) { C\.mv|aW~
MaxHeap h=new MaxHeap(); :CH*~o
h.init(data); YA(_*h
for(int i=0;i h.remove(); 3Ee8_(E\
System.arraycopy(h.queue,1,data,0,data.length); `v2]Jk<
} g~q+a-
~vf&JH'!
private static class MaxHeap{ ;VQFz&Q$u
WY=RJe2
void init(int[] data){ s=)0y$
this.queue=new int[data.length+1]; do3 BI4Q
for(int i=0;i queue[++size]=data; PT2b^PP
fixUp(size); ?gZJ v
} -KzU''
} m]g"]U:
oECM1'=Bf
private int size=0; Ub1?dk
X`,4pSQ;
private int[] queue; 44s K2
]J=S\
public int get() { r 5$(
return queue[1]; &5*)r@+
} TF\<`}akX
79.J`}#
public void remove() { sy^k:y?
SortUtil.swap(queue,1,size--); iEDZ\\,
fixDown(1); Dq T)%a
} R'E8>ee;^
file://fixdown "|1MJuY_6
private void fixDown(int k) { K?l1Gj
int j; |=OO$z;q|
while ((j = k << 1) <= size) { m7:E73:
if (j < size %26amp;%26amp; queue[j] j++; &&1q@m,cP
if (queue[k]>queue[j]) file://不用交换 6~g:"}
break; 6r"PtHr
SortUtil.swap(queue,j,k); rWN#QL()*
k = j; H>AzxhX[n
} ;bt@wgY
} E)(`Z0
private void fixUp(int k) { X^3 0a*sj
while (k > 1) { ^V^In-[!y:
int j = k >> 1; Kuh! b`9
if (queue[j]>queue[k]) ]Ll<
break; =k4yWC5-
SortUtil.swap(queue,j,k); (wJtEoB9^
k = j; eO,
} -Q@jL{Ue
} #unE>#DW
S"|sD|xOb
} -t9oL3J
M mg#Vy~
} oz}p]l7
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SortUtil： (vIrXF5Dnj
)k&pp^q\
package org.rut.util.algorithm; y)3(
UI~ENG
import org.rut.util.algorithm.support.BubbleSort; B0c}5V
import org.rut.util.algorithm.support.HeapSort; '-#6;_ i<
import org.rut.util.algorithm.support.ImprovedMergeSort; UQ|zSalv,
import org.rut.util.algorithm.support.ImprovedQuickSort; 7YRDQjg
import org.rut.util.algorithm.support.InsertSort; @4:cn
import org.rut.util.algorithm.support.MergeSort; $,k SR}
import org.rut.util.algorithm.support.QuickSort; UT[9ERS
import org.rut.util.algorithm.support.SelectionSort; nf< <]iHf
import org.rut.util.algorithm.support.ShellSort; CiP-Zh[gZ
{d$S~
/** =J8)Z'Jr
* @author treeroot wAHb5>!
* @since 2006-2-2 syh0E=If_
* @version 1.0 Q6S[sTKR
*/ *jWU8.W
public class SortUtil { 7YbI|~
public final static int INSERT = 1; |Sg *j-.
public final static int BUBBLE = 2; TGLkwXOkT
public final static int SELECTION = 3; |Y<ca
public final static int SHELL = 4; y? [*qnPj
public final static int QUICK = 5; f5a%/1?
public final static int IMPROVED_QUICK = 6; Ja-D}|;
public final static int MERGE = 7; 98C~%+
public final static int IMPROVED_MERGE = 8; [Hdk=p
public final static int HEAP = 9; ej,MmLu~^
3w )S=4lB
public static void sort(int[] data) { /2u;w!oi.
sort(data, IMPROVED_QUICK); F *; +-e
} +ZXGT
private static String[] name={ >Z^7=5K"O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2h&pm
}; ;J\{r$q
Tu_dkif'
private static Sort[] impl=new Sort[]{ Kw'Dzz%kN
new InsertSort(), ?HIc=
new BubbleSort(), *DkA$Eu3u
new SelectionSort(), }jU{RR%6B
new ShellSort(), &3{:h
new QuickSort(), nGW wXySq
new ImprovedQuickSort(), |~H'V4)zXu
new MergeSort(), se_zCS4Y
new ImprovedMergeSort(), cXJgdBwo
new HeapSort() f.jAJ; N>
}; 6o;lTOes
r"fu{4aX
public static String toString(int algorithm){ UO"8 I2rB
return name[algorithm-1]; ;$i9gP[|m
} v03~=(
tBBN62^X
public static void sort(int[] data, int algorithm) { j~DoMP5Ls
impl[algorithm-1].sort(data); svpWABO
} Op3 IL/
,h/0:?R KW
public static interface Sort { ~73"AWlp
public void sort(int[] data); %o4d43uZ
} !^axO
$ O!f*lG
public static void swap(int[] data, int i, int j) { @YwaOc_%
int temp = data; d;#9xD'
data = data[j]; 8KWTd
data[j] = temp; V2/+SvB2
} 6}NvVolr
} 2L<TqC{,-