[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; n|QA\,=
} m<MN.R7
int i1=l; %$_?%X0=t
int i2=mid+1; ^b.fci{1m
for(int cur=l;cur<=r;cur++){ yM-%x1r~
if(i1==mid+1) 0r&FH$
data[cur]=temp[i2++]; W^H[rX}=
else if(i2>r) `I|Y7GoUO
data[cur]=temp[i1++]; l,b_' m@
else if(temp[i1] data[cur]=temp[i1++]; h{)`W ]~
else 6p,}?6^
data[cur]=temp[i2++]; k5)IBO
} OXoEA a
} `soQp2h-
AZJ|.mV q
} MAc/ T.[
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改进后的归并排序: T?-K}PUcQ
" M&zW&
package org.rut.util.algorithm.support; <%`z:G3
R*vfp?x
import org.rut.util.algorithm.SortUtil; yN}<l%
g-+/zEOUS
/** z7*mT}Q
* @author treeroot `3UvKqe
* @since 2006-2-2 qMBEJ<o
* @version 1.0 @oMl^UYM=
*/ 57U;\L;ZmZ
public class ImprovedMergeSort implements SortUtil.Sort { F@X8a/;F-
wmX *n'l
private static final int THRESHOLD = 10; \'nE{
f%STkL)
/* 00A2[gO9
* (non-Javadoc) C2J@]&
* Cz4l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y3luU&'
*/ !AL?bW
public void sort(int[] data) { LS1}j WU!
int[] temp=new int[data.length]; PF;`mdi-,
mergeSort(data,temp,0,data.length-1); <UJ5n) }"\
} @,q<][q
js=w!q0)9
private void mergeSort(int[] data, int[] temp, int l, int r) { p:|p?
int i, j, k; Uw>g^[V;
int mid = (l + r) / 2; 0OVxx>p/x
if (l == r) `ve5>aw0_Y
return; n11eJEtm
if ((mid - l) >= THRESHOLD) %|?PG i@5
mergeSort(data, temp, l, mid); !iGZo2LV
else ]P(_ d'}
insertSort(data, l, mid - l + 1); %rU8^'Gu
if ((r - mid) > THRESHOLD) #qx$ p
mergeSort(data, temp, mid + 1, r); |"j{!Ei
else s7"NK"
insertSort(data, mid + 1, r - mid); Owe"x2D\
J>@T'#
for (i = l; i <= mid; i++) { MBeubS
temp = data; G1RUu-~+
} ~Ox !7Lp
for (j = 1; j <= r - mid; j++) { %QYH]DR
temp[r - j + 1] = data[j + mid]; 8h,>f#)0c
} 3}Xf
int a = temp[l]; F gi&CJ8Q
int b = temp[r]; apz)4%A
for (i = l, j = r, k = l; k <= r; k++) { Kc3BVZ71
if (a < b) { QfdATK P
data[k] = temp[i++]; e-Pn,j
a = temp; xF/u('A
} else { )#(6J
data[k] = temp[j--]; zwLJ|>
b = temp[j]; vYPZVqF_$
} '<Fr}Cn
} z(YzK
} j aU.hASj
eYpK!9
/** ZH~=;S-t
* @param data Q\QSnMM&]
* @param l fk6`DUBV
* @param i A$7j B4
*/ ~x-"?K
private void insertSort(int[] data, int start, int len) { `X8wnD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {V7W!0;!
} hI$IBf>
} rGn6S&-
} 'vP"&lrn
} }!`_Bz:
vWs#4JoG
堆排序： p.ks jD
kMz*10$gn
package org.rut.util.algorithm.support; +{r~-Rn3
p0|PVn.^h
import org.rut.util.algorithm.SortUtil; Q"Pl)Q\
2gN78#d
/** Ux!q(9<_
* @author treeroot K_Q-9j
* @since 2006-2-2 {Qf/.[
* @version 1.0 %7S{g
*/ 0^25uAD=
public class HeapSort implements SortUtil.Sort{ sJ>JHv
k^{}p8;3
/* (non-Javadoc) d%~OEq1i"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N?{.}-Q
*/ :#zVF[Y(2
public void sort(int[] data) { 0hpU9w}12
MaxHeap h=new MaxHeap(); @TraEBJGL
h.init(data); Jwtt&" c0.
for(int i=0;i h.remove(); ?X'l&k>
System.arraycopy(h.queue,1,data,0,data.length); Njmb{L]Cps
} Maw$^Tz,
k++"
private static class MaxHeap{ g@Z7f y7
@#>YU
void init(int[] data){ 9zD,z+
this.queue=new int[data.length+1]; "+Kp8n6
for(int i=0;i queue[++size]=data; )~{8C:
fixUp(size); Qm)c!
} %%{f-\-7Ig
} !F08F>@D
\GdsQAF"
private int size=0; QR\2%}9b
Q-}cB
private int[] queue; mum4Uj
u):Nq<X
public int get() { (r-8*)Qh8
return queue[1]; 9`Y\`F#}q
} U1=]iG<%
?hOvY)
public void remove() { ,aU8. J_U
SortUtil.swap(queue,1,size--); 4CK$W`V
fixDown(1); >f:OU,"
} o<L=l Q
file://fixdown l:14uWu|
private void fixDown(int k) { |o#pd\
int j; Id?2(Tg
while ((j = k << 1) <= size) { DoFF<LXBt
if (j < size %26amp;%26amp; queue[j] j++; 2SXy)m !
if (queue[k]>queue[j]) file://不用交换 gCZm7dgo
break; bb!cZ>Z
SortUtil.swap(queue,j,k); a/gr1
k = j; yhxZ^(I
} 5iZ;7 ?(
} wF)g@cw
private void fixUp(int k) { "vo o!&<
while (k > 1) { |Li9Y"5
int j = k >> 1; {KqERS& g
if (queue[j]>queue[k]) &&TAX
break; hOr4C4
SortUtil.swap(queue,j,k); iz:O]kI
k = j; 4=ZN4=(_[
} hEfFMi=a`
} %!V=noo
F>"B7:P1:Q
} I7{ Q\C4
!UX7R\qu|
} RO8]R2A
1V;m8)RF
SortUtil： m8z414o
vf h*`G$
package org.rut.util.algorithm; zF_aJ+i:~
$m0-IyXcv
import org.rut.util.algorithm.support.BubbleSort; 2VgVn,c
import org.rut.util.algorithm.support.HeapSort; csms8J
import org.rut.util.algorithm.support.ImprovedMergeSort; Wf9K+my
import org.rut.util.algorithm.support.ImprovedQuickSort; b)+;@wa~
import org.rut.util.algorithm.support.InsertSort; !kWx'tJ$
import org.rut.util.algorithm.support.MergeSort; 7w5 L?,a
import org.rut.util.algorithm.support.QuickSort; !K/zFYl
import org.rut.util.algorithm.support.SelectionSort; <j^"=UN4#
import org.rut.util.algorithm.support.ShellSort; 9 p`|~^X
y3NMt6
/** 1" #W1im
* @author treeroot nCSXvd/
* @since 2006-2-2 _|KeB(W
* @version 1.0 a+p_47 xa
*/ O<`\9
public class SortUtil { =f-.aq(G/
public final static int INSERT = 1; M{M?#Q
public final static int BUBBLE = 2; a3(q;^v
public final static int SELECTION = 3; .="[In'
public final static int SHELL = 4; MDh^ic5
public final static int QUICK = 5; #>(h!lT_
public final static int IMPROVED_QUICK = 6; zoO9N oUHW
public final static int MERGE = 7; e!|T Tap
public final static int IMPROVED_MERGE = 8; N!#TK9
public final static int HEAP = 9; bhc .UmH
,L,?xvWG
public static void sort(int[] data) { ZHW|P
sort(data, IMPROVED_QUICK); %.n 7+
} 8A3!XA
private static String[] name={ |h75S.UY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" F!qt#Sw!\
}; Q.]RYv}\
}!0nb)kL
private static Sort[] impl=new Sort[]{ lhLE)B2a2
new InsertSort(), $l!+SLK
new BubbleSort(), ~R\Z&oQ
new SelectionSort(), 97n@HL1
new ShellSort(), YJEL'k<l
new QuickSort(), wa}\bNKQk
new ImprovedQuickSort(), 8I*WVa$l
new MergeSort(), |UZhMF4/-L
new ImprovedMergeSort(), #{u>
new HeapSort() X6lR?6u%|
}; d)7V:
8C!D=Vhh
public static String toString(int algorithm){ ;wkoQ8FD9
return name[algorithm-1]; :6Oh?y@
} muqIh!nn
#`9D,+2iB%
public static void sort(int[] data, int algorithm) { qf2;yRc&
impl[algorithm-1].sort(data); G[=8Ko0U+n
} y $K#M
ZT;:Hxv0N
public static interface Sort { l;gj],*
public void sort(int[] data); (ON_(MN
} G~\ SI.
ve|`I=?2
public static void swap(int[] data, int i, int j) { 9O/l{
int temp = data; e~,/Z\i
data = data[j]; }4n?k'_s?
data[j] = temp; 5wws8w
} ]JXpe]B
} _(<D*V[