[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; JS$ojL^
} Cl&YN}t5
int i1=l; gaV>WF
int i2=mid+1; wl7G6Y2
for(int cur=l;cur<=r;cur++){ }LeizbU
if(i1==mid+1) wwUa+6?
data[cur]=temp[i2++]; Ce_k&[AJF
else if(i2>r) _Oc5g5_{
data[cur]=temp[i1++]; KDxqz$14-
else if(temp[i1] data[cur]=temp[i1++]; ?h\fwF3
else mBN+c9n/
data[cur]=temp[i2++]; =S#9\W&6Q
} $raq,SP
} %^Zu^uu
S\io5|P
} maTQ0GX
4 ))ZBq?
改进后的归并排序: ;S0Kf{DN2
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package org.rut.util.algorithm.support; ^pwT8Bp
2fN2!OT
import org.rut.util.algorithm.SortUtil; ur\<NApT;
}ff+RGxLIG
/** X)Zc*9XA
* @author treeroot Nk2n&(~$
* @since 2006-2-2 [] cF*en
* @version 1.0 M47t(9krV
*/ V$0mcwH
public class ImprovedMergeSort implements SortUtil.Sort { .7BJq?K.
q<[m(]:
private static final int THRESHOLD = 10; [eLMb)n
x/NjdK
/* x4bmV@b
* (non-Javadoc) [|&#A;{F#
* G9_7jX*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /Ixv{H)H
*/ f*o+g:]3
public void sort(int[] data) { L _D#
int[] temp=new int[data.length]; z=/&tRe W
mergeSort(data,temp,0,data.length-1); &$yxAqdab
} +9exap27
Y]VLouzl
private void mergeSort(int[] data, int[] temp, int l, int r) { @B\$ me
int i, j, k; L%;fYi;n
int mid = (l + r) / 2; 45Hbg
if (l == r) WA((>Daf]
return; z94#:jPmG
if ((mid - l) >= THRESHOLD) k:[T#/;
mergeSort(data, temp, l, mid); CFXr=.yz
else B@k2lHks(
insertSort(data, l, mid - l + 1); 56o(gCj?y
if ((r - mid) > THRESHOLD) mRO@ZY;5
mergeSort(data, temp, mid + 1, r); "*<)pnJ
else G,!{Q''w
insertSort(data, mid + 1, r - mid); G,e!!J
(1e,9!?
for (i = l; i <= mid; i++) { O!se-h5mW8
temp = data; nD.K*#u
} CT?4A1[aD
for (j = 1; j <= r - mid; j++) { = IJ}b=:
temp[r - j + 1] = data[j + mid]; r17"i.n
} gz#2}
int a = temp[l]; qr4.s$VGs*
int b = temp[r]; Cz|F%>y#
for (i = l, j = r, k = l; k <= r; k++) { NK\0X5##.
if (a < b) { i&^]qL|J
data[k] = temp[i++]; AO]k*N,N
a = temp; w?V;ItcL
} else { Fe1XczB
data[k] = temp[j--]; !?)aZ |r
b = temp[j]; I;Pd}A_}=_
} yXQ 28A
} ZZM;%i-B
} +;T\:'CU
j-#h^3l1?
/** BD- c<K"
* @param data &$bcB]C\3
* @param l LNcoTdv}k
* @param i =%SH2kb
*/ n"w>Y)C(X)
private void insertSort(int[] data, int start, int len) { '""s%C+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .B?fG)'WsF
} cHC1l
} GXi)3I%
} _MWW
} 7jw5'`;)"
!i_~<6Wa7
堆排序： {b|V;/
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package org.rut.util.algorithm.support; B[~Q0lPih
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import org.rut.util.algorithm.SortUtil; cJ\1ndBH
vRb7=fXf
/** lWDSF]ZYV
* @author treeroot }Te+Rv7{E
* @since 2006-2-2 'w0?-
* @version 1.0 (&-I-#i
*/ eus@;l*
public class HeapSort implements SortUtil.Sort{ K5 EJ#1ov
t>P[Yld"
/* (non-Javadoc) G<P/COI#M5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [0D.+("EW
*/ q'9;
public void sort(int[] data) { @1~cPt
MaxHeap h=new MaxHeap(); l{QlJ>%~{;
h.init(data); BCO (,k
for(int i=0;i h.remove(); $F1Am%
System.arraycopy(h.queue,1,data,0,data.length); +7{8T{
} oT|:gih5
@~&|BvK% \
private static class MaxHeap{ 1:RK~_E
'U,\5jj'Y
void init(int[] data){ \!"3yd
this.queue=new int[data.length+1]; Wo Z@
for(int i=0;i queue[++size]=data; 5S[:;o
fixUp(size); {Y3:Y+2X3*
} kZ;Y/DH
} IOa@dUh7a,
Wj8WT)cB
private int size=0; Gzp*Vr
v%kl*K`*
private int[] queue; }zIWagC6
tkmzOc H
public int get() { /]?e^akA
return queue[1]; i|0!yID0@
} r)B55;*Fh
XT\2
public void remove() { w4FYd
SortUtil.swap(queue,1,size--); 3lbGG42:
fixDown(1); <E:_9#Z0sc
} R[kF(C&
file://fixdown &UVqFo
private void fixDown(int k) { qT01@Bku
int j; Nxt`5kSx=
while ((j = k << 1) <= size) { ]x66/O\0u
if (j < size %26amp;%26amp; queue[j] j++; gH.$B'
if (queue[k]>queue[j]) file://不用交换 0EasPbp
break; e0]#vqdO
SortUtil.swap(queue,j,k); lk[u
k = j; WpOH1[8v
} g][n1$%
} qC-4X"y+
private void fixUp(int k) { S_ra8HY8
while (k > 1) { 5~$WSL?O)
int j = k >> 1; HIUP =/x
if (queue[j]>queue[k]) <?:h(IZe[
break; m{&lU@uL
SortUtil.swap(queue,j,k); vs>Pd |p;
k = j; $KBW{
} `<#O8,7`
} ?BbEQr
);?tGX
} C`uL 4r
>|0I\{C
} 1ed^{Wa4$9
[+ : zlA
SortUtil： t. HwX9
HdyE`FY\
package org.rut.util.algorithm; C~^T=IP
3NdO3-~)
import org.rut.util.algorithm.support.BubbleSort; $oJjgAxcZ
import org.rut.util.algorithm.support.HeapSort; #bCUI*N"P
import org.rut.util.algorithm.support.ImprovedMergeSort; =@&>r5W1
import org.rut.util.algorithm.support.ImprovedQuickSort; s@g _F
import org.rut.util.algorithm.support.InsertSort; p}JGx^X~
import org.rut.util.algorithm.support.MergeSort; o?+?@Xb'
import org.rut.util.algorithm.support.QuickSort; rHqP[[4B'
import org.rut.util.algorithm.support.SelectionSort; a@AIv"q
import org.rut.util.algorithm.support.ShellSort; RjR+'<7E^
E>:#{%
/** 'e6J&X
* @author treeroot WEoD?GLS8
* @since 2006-2-2 8Pva]Q
* @version 1.0 7jr+jNsowj
*/ hu7oJ H
public class SortUtil { 8Q0/kG
public final static int INSERT = 1; +:Nz_l
public final static int BUBBLE = 2; |,({$TrF
public final static int SELECTION = 3; Y\ ;hjxR-
public final static int SHELL = 4; F6\4[B
public final static int QUICK = 5; 7\X_%SM%
public final static int IMPROVED_QUICK = 6; ulk/I-y
public final static int MERGE = 7; s){VU2.ra
public final static int IMPROVED_MERGE = 8; 'H"!%y{:i
public final static int HEAP = 9; U lCw{:#F
Nr}O6IJ>Sg
public static void sort(int[] data) { xZ* B}O{{H
sort(data, IMPROVED_QUICK); b2RW=m-
} 9!0-~,o
private static String[] name={ vP_mS 4X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Xc&J.Tw#4*
}; 'Tskx
3JD"* <zs
private static Sort[] impl=new Sort[]{ 9yu#G7
new InsertSort(), 'j?H>'t{
new BubbleSort(), Hn/V*RzQ
new SelectionSort(), uc\G)BN
new ShellSort(), N/1xc1$SB
new QuickSort(), >.H}(!
new ImprovedQuickSort(), ^)'D eP/
new MergeSort(), 4F<was/
new ImprovedMergeSort(), {DE4PE`
new HeapSort() X_)I"`
}; ) r"7"i
W}|k!_/
public static String toString(int algorithm){ Z`Jt6QgW
return name[algorithm-1]; ]ki) (Bb
} "*TP@X?@f
rT[b ^l}
public static void sort(int[] data, int algorithm) { H`yUSB IP
impl[algorithm-1].sort(data); F3 g$b,RMH
} LG{50sP`
yNG|YB;
public static interface Sort { iAeq%N1(0
public void sort(int[] data); Gz--C(
} jN(c`Gb
U} Pr1
public static void swap(int[] data, int i, int j) { k9&W0$I#
int temp = data; +x?8\
data = data[j]; e?\hz\^
data[j] = temp; .eCUvX`$
} 8hMy$
} ?5EMDawt