[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; Xx^c?6YM
} m|k,8guG
int i1=l; 7Av]f3Zr
int i2=mid+1; 4Y2>w
for(int cur=l;cur<=r;cur++){ `zL9dlZ
if(i1==mid+1) J]UHq$B
data[cur]=temp[i2++]; '3Ri/V,
else if(i2>r) _e'mG'P(
data[cur]=temp[i1++]; Ojs\2('u
else if(temp[i1] data[cur]=temp[i1++]; r$7rYxFR
else P#xn!fMi
data[cur]=temp[i2++]; B]vj1m`9
} 6PH*]#PfoD
} )N/KQ[W
7Tbkti;
} F)@<ZE
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改进后的归并排序: 6yb<4@LOb
RB"rx\u7K
package org.rut.util.algorithm.support; Ie~~LU
EkX6> mo
import org.rut.util.algorithm.SortUtil; 0#JBz\
R<=t{vTJ5
/** QZlUUj\
* @author treeroot 6D0,ME#
* @since 2006-2-2 G!\xc
* @version 1.0 S%oGBY*Z
*/ }dz(DPd
public class ImprovedMergeSort implements SortUtil.Sort { b\2"1m0H
F0\ry "(t
private static final int THRESHOLD = 10; &u8c!;y$b
"DpQnhvbB
/* JF gN
* (non-Javadoc) ry0 =N^
* 2}b bdXx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v4$,Vt:7
*/ ?KN_J
public void sort(int[] data) { 3(%,2
int[] temp=new int[data.length]; #!/Nmd=Nj
mergeSort(data,temp,0,data.length-1); 8'_Y=7b0Nw
} ^Ram8fW
0"`skYJ@
private void mergeSort(int[] data, int[] temp, int l, int r) { d%hA~E1rR
int i, j, k; m5Kx}H~
int mid = (l + r) / 2; Mx"tUoU6z
if (l == r) MF`'r#@:wa
return; yKJ^hv"#
if ((mid - l) >= THRESHOLD) gISs+g
mergeSort(data, temp, l, mid); Vz*'^=(o&
else bRp[N
insertSort(data, l, mid - l + 1); WQx;tX
if ((r - mid) > THRESHOLD) KfNXX>'
mergeSort(data, temp, mid + 1, r); %u}sVRJ
else vknFtpx
insertSort(data, mid + 1, r - mid); YC'~8\x3z
@Hh"Y1B
for (i = l; i <= mid; i++) { B}X#oA
temp = data; e=jO_[
} 5MJ'/Fy(
for (j = 1; j <= r - mid; j++) { "puz-W'n
temp[r - j + 1] = data[j + mid]; R{_IrYk
} mQd?Tyvn
int a = temp[l]; @ni~ij
int b = temp[r]; Ne 4*MwK
for (i = l, j = r, k = l; k <= r; k++) { v%5(-
if (a < b) { &u-Bu;G.e
data[k] = temp[i++]; k 9rnT)YU
a = temp; $nn5;11@gY
} else { D,a%Je-r,
data[k] = temp[j--]; IJ;*N
b = temp[j]; =Qrz|$_rv
} OB22P%
} ?sYjFiE
} &v,p_'k
U@nwSfp:G
/** 7g9^Jn
* @param data Ziimz}WHF
* @param l ".f:R9-
* @param i 5g5NTm`=<
*/ Umg81!
private void insertSort(int[] data, int start, int len) { WKsx|a]U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Phu| hx<
} n bk(FD6
} [[Z>(d$8
} TzGm562o%
} U.OX*-Cd
Oy$BR <\
堆排序： mNoqs&UB
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package org.rut.util.algorithm.support; M7,MxwZ0k
>N-%
import org.rut.util.algorithm.SortUtil; "6Uj:9
i5Q<~;Z+
/** zi .,?Q
* @author treeroot WmUW i{
* @since 2006-2-2 A#&qoZ(C
* @version 1.0 Ir #V2]$
*/ zD<9A6AB
public class HeapSort implements SortUtil.Sort{ `gN68:B
N1~$ +
/* (non-Javadoc) "|`9{/]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X>7]g670@
*/ \*aLyyy3
public void sort(int[] data) { <|3v@
MaxHeap h=new MaxHeap(); \[1CDz=}1
h.init(data); !#1A7[WN
for(int i=0;i h.remove(); y$o=\:
System.arraycopy(h.queue,1,data,0,data.length); XS8~jBjx
} [[h)4H{T
=pyZ^/}P
private static class MaxHeap{ y4We}/-<
&>.1%x@R
void init(int[] data){ @;D}=$x
this.queue=new int[data.length+1]; es+_]:7B9
for(int i=0;i queue[++size]=data; B@inH]wq
fixUp(size); wS*CcIwj
} cu!bg+,zl
} 9Pk3}f)a
h./vTNMc
private int size=0; )=nPM`Jn.
!r obau7
private int[] queue; /(ju
+WN>9V0H
public int get() { '. Hp*9R
return queue[1]; h!av)nhM
} l~TIFmHkh%
Gj8[*3d
public void remove() { 8:?Q(M7
SortUtil.swap(queue,1,size--); sJK:xk.6!
fixDown(1); 1[g!^5W
} Fi%W\Y'
file://fixdown h?3l
private void fixDown(int k) { DPQGh`J
int j; U4l*;od
while ((j = k << 1) <= size) { PJ'lZu8?x
if (j < size %26amp;%26amp; queue[j] j++; V,"iMo
if (queue[k]>queue[j]) file://不用交换 VfqY_NmgC
break; [j]J_S9jJ
SortUtil.swap(queue,j,k); >ydb?
k = j; G4%M$LJh
} emY5xZ@N
} 7h9[-d6
private void fixUp(int k) { m2q;^o:J
while (k > 1) { a05:iFoJ
int j = k >> 1; +M O5'z
if (queue[j]>queue[k]) |;u%JW$4
break; QC5f:BwM
SortUtil.swap(queue,j,k); ?Ga2K
k = j; f@Rpb}zg+C
} &Dg)"Xji
} @W\4UX3dK
&#PBww
} pY!dG-;
|8qK%n f}
} u~- fK'/!|
QB3d7e)8>
SortUtil： }d3N`TT
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package org.rut.util.algorithm; #w,WwL!
oz0n$`O$/
import org.rut.util.algorithm.support.BubbleSort; R!k<l<9q
import org.rut.util.algorithm.support.HeapSort; +.(}u ,:8
import org.rut.util.algorithm.support.ImprovedMergeSort; JdUz!=I
import org.rut.util.algorithm.support.ImprovedQuickSort; r5!x,{E6
import org.rut.util.algorithm.support.InsertSort; Ns|V7|n]
import org.rut.util.algorithm.support.MergeSort; u->@|tEq
import org.rut.util.algorithm.support.QuickSort; E7NbPNd
import org.rut.util.algorithm.support.SelectionSort; g t^]32$
import org.rut.util.algorithm.support.ShellSort; 2VV[*QI
,KhMzE8_a
/** B==a
* @author treeroot tk)>CK11
* @since 2006-2-2 |IX`(
* @version 1.0 2^^'t6@
*/ [[?[? V ,
public class SortUtil { : >wQwf
public final static int INSERT = 1; T7lj39pJq
public final static int BUBBLE = 2; n:*_uc^C
public final static int SELECTION = 3; vJj:9KcP>h
public final static int SHELL = 4; by|?g8
public final static int QUICK = 5; 9 yW~79n
public final static int IMPROVED_QUICK = 6; p17|ld`
public final static int MERGE = 7; eC^0I78x
public final static int IMPROVED_MERGE = 8; v(Bp1~PPZM
public final static int HEAP = 9; H#|Z8^ *Ds
gN, k/U8
public static void sort(int[] data) { :,%J6Zh?
sort(data, IMPROVED_QUICK); s la*3~?*
} .YjrV+om1
private static String[] name={ xOVA1pb,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" uhTKCR~
}; Wd^lt7(j
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private static Sort[] impl=new Sort[]{ +24|_Lx0
new InsertSort(), M$&WM{Pr^
new BubbleSort(), z)&naw.
new SelectionSort(), O>SuZ>g+7
new ShellSort(), RP~vB#}
new QuickSort(), %$ir a\ sM
new ImprovedQuickSort(), Z:UgozdC
new MergeSort(), qab) 1ft
new ImprovedMergeSort(), VBbUl|X\
new HeapSort() %="~\1y
}; XN~#gm#
e0v9uQ%F5
public static String toString(int algorithm){ dysX
return name[algorithm-1]; DOF?(:8Y
} %z-dM` i
f[JI/H>
public static void sort(int[] data, int algorithm) { d s|8lz,
impl[algorithm-1].sort(data); ?jNF6z*M6
} qeQC&U y;
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public static interface Sort { P[rAJJN/E
public void sort(int[] data); -GDV[Bg
} pAJ=f}",]E
|'U,/
public static void swap(int[] data, int i, int j) { ";)r*UgR{B
int temp = data; &\[Qm{lN
data = data[j]; I%;Rn:zl
data[j] = temp; o{{:|%m3Q
} *D=K{bUe'
} 0)A=+zSS1