[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; ?<;<#JN
} ?KN_J
int i1=l; 3(%,2
int i2=mid+1; #!/Nmd=Nj
for(int cur=l;cur<=r;cur++){ b~gF,^w
if(i1==mid+1) LPO" K"'w
data[cur]=temp[i2++]; S\A[Z&k0
else if(i2>r) hd~rC*I
data[cur]=temp[i1++]; rx/6x(3
else if(temp[i1] data[cur]=temp[i1++]; ;qMlGXW*q
else 9m6j?CFG}
data[cur]=temp[i2++]; @-}]~|<
} brWt
} =S,<yQJ
9o`3g@6z
} 7 SZR#L
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改进后的归并排序: 0h#M)Ft
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package org.rut.util.algorithm.support; H JiP:{
keOW{:^i
import org.rut.util.algorithm.SortUtil; ;Y\,2b, xh
UZra'+Wb
/** $w\, ."y
* @author treeroot In&vh9Lw
* @since 2006-2-2 fsd>4t:"\
* @version 1.0 .Q@"];wH
*/ %Qq)=J<H;
public class ImprovedMergeSort implements SortUtil.Sort { Xdt+\}\
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private static final int THRESHOLD = 10; w C"%b#(}
PvwIO_W
/* CCOg1X_
* (non-Javadoc) SO/]d70HG
* pZxL?N!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;\+0H$
*/ *q{UipZbx
public void sort(int[] data) { $Stu-l1e a
int[] temp=new int[data.length]; $P3nP=mf
mergeSort(data,temp,0,data.length-1); [3Rj?z"S
} 5b p"dIe
0 ,-b %X
private void mergeSort(int[] data, int[] temp, int l, int r) { 7p6J
int i, j, k; JuSS5_&
int mid = (l + r) / 2; RZA\-?cO)
if (l == r) *\", qMp
return; #cS,5(BM
if ((mid - l) >= THRESHOLD) @XC97kGWp
mergeSort(data, temp, l, mid); dL(|Y{4
else mC`! \"w
insertSort(data, l, mid - l + 1); q;.]e#wvh
if ((r - mid) > THRESHOLD) CN(4;-so)
mergeSort(data, temp, mid + 1, r); 46Nf|~
else UmX[=D|
insertSort(data, mid + 1, r - mid); Oy$BR <\
avu,o
for (i = l; i <= mid; i++) { ?` i/
temp = data; 3:1 c_
} u7WM6X
for (j = 1; j <= r - mid; j++) { Bq_P?Q+\
temp[r - j + 1] = data[j + mid]; 6/ipdi[ _
} 6a?p?I K^
int a = temp[l]; @~3c"q;i7
int b = temp[r]; PqLqF5`S
for (i = l, j = r, k = l; k <= r; k++) { ^~ $&
if (a < b) { nD\os[ 3
data[k] = temp[i++]; \*aLyyy3
a = temp; mcr#Ze
} else { <z2mNq
data[k] = temp[j--]; p]Zabky
b = temp[j]; J5_Y\@
} 4uAafQ`@H
} [[h)4H{T
} Ba|}C(Ws?
L]N2rMM
/** &>.1%x@R
* @param data } <4[(N
* @param l NqE7[wH
* @param i ok%!o+nk.
*/ ;<@6f@
private void insertSort(int[] data, int start, int len) { rq["O/2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lFGxW 5
} tkqBCKpDa
} ZM`P~N1?)g
} a9zph2o-
} x9A ZS#e)[
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堆排序： (!5}" fj
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package org.rut.util.algorithm.support; OKP_3Ns
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import org.rut.util.algorithm.SortUtil; cqL7dlhIl
{JCz^0DV
/** g*?+~0"`Y
* @author treeroot =GKYroNM
* @since 2006-2-2 GtJ*&=(
* @version 1.0 ANQa2swM
*/ )-KE4/G
public class HeapSort implements SortUtil.Sort{ m_02"'
tO>OD#
/* (non-Javadoc) H9Q7({v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uf'P9MA}>
*/ 8pMZ~W;
public void sort(int[] data) { `W$0T;MPF
MaxHeap h=new MaxHeap(); ?En| _E_C
h.init(data); &Z;8J @
for(int i=0;i h.remove(); RG r'<o)
System.arraycopy(h.queue,1,data,0,data.length); Po11EZa$a
} -s%-*K+,W
GL =XiBt
private static class MaxHeap{ s8Ry}{
V/9"Xmv75
void init(int[] data){ ro^6:w3O^
this.queue=new int[data.length+1]; "Xk%3\{P
for(int i=0;i queue[++size]=data; +M O5'z
fixUp(size); J*~2:{=%
} gq_7_Y/
} j /dE6d
p$1Rgm\
private int size=0; ?Ga2K
#C;zS9(]B
private int[] queue; ]n]uN~)9
dFP-(dX#
public int get() { |k .M+
return queue[1]; @W\4UX3dK
} ddq 1NW
1;:t~Y
public void remove() { @23RjoK
SortUtil.swap(queue,1,size--); gLSG:7m@
fixDown(1); `TD%M`a
} ?I2k6%a
file://fixdown ?WQd
private void fixDown(int k) { Fr3d#kVR
int j; pG F5aF7T
while ((j = k << 1) <= size) { CziaxJ
if (j < size %26amp;%26amp; queue[j] j++; x"llX
if (queue[k]>queue[j]) file://不用交换 g[wP!y%V
break; *JY`.t
SortUtil.swap(queue,j,k); O})u'
k = j; N~S[xS?
} 3pTS@
} O`[iz/7m
private void fixUp(int k) { yEpN,A
while (k > 1) { $mI:Im`s
int j = k >> 1; ZA_zKJ[[7
if (queue[j]>queue[k]) nze1]3`
break; g"!#]LLe
SortUtil.swap(queue,j,k); ,;cel^.b
k = j; }]g95xT
} ]Z$TzT&@%
} (O_t5<A*X
2Z;`#{
} mU3Y)
+)JNFy-
} '/u:,ar
`gt&Y-
SortUtil： or%gTVZ
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package org.rut.util.algorithm; @W1WReK]f
tFvgvx\:
import org.rut.util.algorithm.support.BubbleSort; }}``~
import org.rut.util.algorithm.support.HeapSort; PJK]t7vp
import org.rut.util.algorithm.support.ImprovedMergeSort; fY%M=,t3c
import org.rut.util.algorithm.support.ImprovedQuickSort; Z.aLk4QO@
import org.rut.util.algorithm.support.InsertSort; 0/SC
import org.rut.util.algorithm.support.MergeSort; L* khj3;
import org.rut.util.algorithm.support.QuickSort; qJX+[PJ
import org.rut.util.algorithm.support.SelectionSort; B3cf] S%
import org.rut.util.algorithm.support.ShellSort; R?bn,T>
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/** iz9\D*or
* @author treeroot }c35FM,
* @since 2006-2-2 _z<Y#mik
* @version 1.0 cVB|sYdf
*/ k_K,J6_)
public class SortUtil { e+F}9HR7
public final static int INSERT = 1; j(Fa=pi
public final static int BUBBLE = 2; /zl3&~4
public final static int SELECTION = 3; OAW=Pozr9
public final static int SHELL = 4; jiwpDB&[
public final static int QUICK = 5; 9 wSl,B-
public final static int IMPROVED_QUICK = 6; CQBT::
public final static int MERGE = 7; $^vp'^uW>
public final static int IMPROVED_MERGE = 8; `i t+D
public final static int HEAP = 9; 6^]`-4*W
@Xq&t}*8
public static void sort(int[] data) { "M9TB. O
sort(data, IMPROVED_QUICK); V~J*49t&2J
} l$qStL*8O
private static String[] name={ YeRcf`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P1 7>6)a
}; ;Na8_}
` $.X[\*U
private static Sort[] impl=new Sort[]{ `z3|M#r\;
new InsertSort(), &Rt+LN0qB0
new BubbleSort(), FE8+E\ U?
new SelectionSort(), ){O1&|z-
new ShellSort(), HUU >hq9
new QuickSort(), Kf05<J!
new ImprovedQuickSort(), &*(n<5wt
new MergeSort(), 2I]]WBW#:
new ImprovedMergeSort(), rV8(ia
new HeapSort() |'U,/
}; ";)r*UgR{B
&\[Qm{lN
public static String toString(int algorithm){ I%;Rn:zl
return name[algorithm-1]; ilDJwZg#
} 0NL :z1N-h
>vD['XN,
public static void sort(int[] data, int algorithm) { \#\`!L[1
impl[algorithm-1].sort(data); F* 3G_V
} TnN^2:cU
E1c>nrnh*
public static interface Sort { 9,S,NvSq
public void sort(int[] data); BGB,Gb
} xHEVR!&c4
Q7CwQi
public static void swap(int[] data, int i, int j) { 6-*~t8
int temp = data; 457fT|
data = data[j]; tXf}jU}
data[j] = temp; QO5OnYh
} ; @7
} eZ!yPdgy|