[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; UHfE.mTjM
} G;/> N'#
int i1=l; G^L9[c= ,
int i2=mid+1; S%?>Mh?g
for(int cur=l;cur<=r;cur++){ C.uv0
if(i1==mid+1) _M;{}!Gc&A
data[cur]=temp[i2++]; ca0vN^Ji
else if(i2>r) A -8]4p::
data[cur]=temp[i1++]; r_bG+iw7p
else if(temp[i1] data[cur]=temp[i1++]; 7}c[GC)F
else r0&LjH&R
data[cur]=temp[i2++]; (C`nBiL<
} %t9Kc9u3p
} ^-~=U^2tC
2|RxowXZ"
} i[.7 8K-s
SZtSUt(ss
改进后的归并排序: jL3 *m
'_K`1&#U
package org.rut.util.algorithm.support; D"fjk1
k{Y\YG%b
import org.rut.util.algorithm.SortUtil; $OGMw+$C^
@#o7U
/** n@C#,v#^0
* @author treeroot ib]<;t
* @since 2006-2-2 rfgsas{F
* @version 1.0 -s0J8b
*/ / )[\+Nc
public class ImprovedMergeSort implements SortUtil.Sort { @LU[po1I
e2nZwPH
private static final int THRESHOLD = 10; ? )IH#kL
|D'!.$7%
/* F$:mGyl5_
* (non-Javadoc) 7n;a_Z0s$
* =''*'a-P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y<@_d
*/ l:#'i`;
public void sort(int[] data) { slr>6o%W`
int[] temp=new int[data.length]; U&$I!80.
mergeSort(data,temp,0,data.length-1); <A\g*ld
} P6v@ Sn
/<O9^hA|
private void mergeSort(int[] data, int[] temp, int l, int r) { !#olG}#[
int i, j, k; Skux&'N:
int mid = (l + r) / 2; mkBQTQGT
if (l == r) .rDao]K
return; 8|hi2Qeu,c
if ((mid - l) >= THRESHOLD) "4*QA0As
mergeSort(data, temp, l, mid); cZWW[i
else 4l/~::y
insertSort(data, l, mid - l + 1); .Z17X_
if ((r - mid) > THRESHOLD) 4h}\Kl
mergeSort(data, temp, mid + 1, r); IL*MB;0>
else J04R,B
insertSort(data, mid + 1, r - mid); \naG
vL"noLs
for (i = l; i <= mid; i++) { <`A!9+
temp = data; zrtbk~v8y
} j_zy"8Y{
for (j = 1; j <= r - mid; j++) { 73nmDZO|
temp[r - j + 1] = data[j + mid]; 6p,}?6^
} Fk`6 q
int a = temp[l]; :}v:=ck
int b = temp[r]; c Ct5m
for (i = l, j = r, k = l; k <= r; k++) { "(+aWvb
if (a < b) { GsqO^SV
data[k] = temp[i++]; $VxuaOTyVZ
a = temp; aJ]t1
} else { ^#7&R"
data[k] = temp[j--]; q| *nd!y'
b = temp[j]; ]zvOM^l~
} T?-K}PUcQ
} ; Oz p
} fX&g. fH
Hu!<GB~
/** B=%YD"FAv
* @param data N,cj[6;T%
* @param l Tl^)O^/
* @param i 4)N~*+~\h
*/ g-+/zEOUS
private void insertSort(int[] data, int start, int len) { kw1Lm1C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); LyNur8 Zi
} x1#6~283
} )YLZ"@
} _p+q)#.W
} ljh,%#95=
?3iN)*Ut
堆排序： (L<G=XC
mx^rw*'JGC
package org.rut.util.algorithm.support; F@X8a/;F-
YE@!`!`d:
import org.rut.util.algorithm.SortUtil; %U97{y
Fi+,omB&
/** E{}eYU
* @author treeroot gLg\W3TOi
* @since 2006-2-2 d[ce3':z
* @version 1.0 >PygUY d
*/ UWBR5
public class HeapSort implements SortUtil.Sort{ ).HnK
K5d>{c
/* (non-Javadoc) xkz`is77Y@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q +c~Bd
*/ Fw"x4w
public void sort(int[] data) { dC">AW
MaxHeap h=new MaxHeap(); IBv9xP]BZ
h.init(data); Sj4@pMh4
for(int i=0;i h.remove(); [#2z=Xg
System.arraycopy(h.queue,1,data,0,data.length); \88IFE
} @,q<][q
P-\T BS_O
private static class MaxHeap{ }/.b@`Dh;
Y{m1\s/o
void init(int[] data){ rP&.`m88n
this.queue=new int[data.length+1]; N5fMMi(O
for(int i=0;i queue[++size]=data; E`3[62C
fixUp(size); Z9PG7h
} ]<E\J+5K
} k5GJrK+
eN I6V/\`
private int size=0; uacVF[9|W
, @6_sl
private int[] queue; eZRu{`AF*
J,wpY$93
public int get() { ()@+QE$
return queue[1]; zDA;FKZPp
} e5cvmUF_W
/=:X,^"P
public void remove() { c<g{&YJ
SortUtil.swap(queue,1,size--); j}DG +M
fixDown(1); p4wXsOQ}
} 5A"OL6ty
file://fixdown ~FZ=
private void fixDown(int k) { '\Hh
int j; U_Va'7
while ((j = k << 1) <= size) { ;z^C\=om
if (j < size %26amp;%26amp; queue[j] j++; Ha/-v?E
if (queue[k]>queue[j]) file://不用交换 ?bK^IHh
break; W6uz G
SortUtil.swap(queue,j,k); ;(9q, )
k = j; kA<58,!
} Y-c_ 2 )
} C+c;UzbD
private void fixUp(int k) { t[^68]
while (k > 1) { @{UtS2L
int j = k >> 1; 9.$k^|~
if (queue[j]>queue[k]) XhJbBVS|
break; /*{s1Zcb
SortUtil.swap(queue,j,k); |<1
k = j; :+\B|*T2.L
} VSa#X |z
} b\9}zmG[u
q%GlS=o"
} o%=OBTh_
TW?A/GoXI
} !BW6l)=L
cYp]zn+6
SortUtil： V@Fj!/
2AI~Jm#
package org.rut.util.algorithm; M2e_)f:
;?0k>
import org.rut.util.algorithm.support.BubbleSort; %,G0)t
import org.rut.util.algorithm.support.HeapSort; }zu?SZH
import org.rut.util.algorithm.support.ImprovedMergeSort; 72>/@
import org.rut.util.algorithm.support.ImprovedQuickSort; ^iaG>rvA
import org.rut.util.algorithm.support.InsertSort; VKp4FiI6
import org.rut.util.algorithm.support.MergeSort; 0')O4IHH
import org.rut.util.algorithm.support.QuickSort; 8DP] C9
import org.rut.util.algorithm.support.SelectionSort; t#6@~49
import org.rut.util.algorithm.support.ShellSort; D^9r#&
Y5Jrkr)k
/** -*Z;EA-
* @author treeroot ht%:e?@i
* @since 2006-2-2 %JC-%TRWK
* @version 1.0 %$L!N-U6
*/ d@-bt s&3
public class SortUtil { xA>O4SD
public final static int INSERT = 1; h*9s^`9)
public final static int BUBBLE = 2; H"A|Z6y$^
public final static int SELECTION = 3; VdV18-ea
public final static int SHELL = 4; >|22%YVX
public final static int QUICK = 5; UFy"hJchO
public final static int IMPROVED_QUICK = 6; eE/E#W8
public final static int MERGE = 7; }<hyW9
public final static int IMPROVED_MERGE = 8; (},TZ+u
public final static int HEAP = 9; X!%CYmIRb
4:p+C-gs
public static void sort(int[] data) { |+Fko8-
sort(data, IMPROVED_QUICK); w8df-]r
} L^zF@n^5A
private static String[] name={ w(KB=lA2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" WS?"OTH.^\
}; IirXF?&t
co$I htOv
private static Sort[] impl=new Sort[]{ E/</
new InsertSort(), IMDGinHAy
new BubbleSort(), b-rgiR$cg
new SelectionSort(), QK3j.Ss
new ShellSort(), 6Tn.56X
new QuickSort(), xG^6'<
new ImprovedQuickSort(), DPE]<oM
new MergeSort(), Z&!5'_9{V
new ImprovedMergeSort(), S-\;f jh
new HeapSort() ')Drv)L
}; rmOcA
X>`e(1`_O
public static String toString(int algorithm){ prx)Cfv
return name[algorithm-1]; Z2,[-8,Kx
} [80L|?, *
P<@V
public static void sort(int[] data, int algorithm) { 8e9ZgC|
impl[algorithm-1].sort(data); t_PAXj
} yJJNr]oq
CfoT$g
public static interface Sort { ? LA>5
public void sort(int[] data); 2/K38t'-
} W9ZfD~(3-
oyS43/."
public static void swap(int[] data, int i, int j) { G/:;Qig
int temp = data; A[F tPk{k
data = data[j]; `is."]%f
data[j] = temp; !z7j.u`Y
} e==}qQ
} '<.@a"DnJ