[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; d:ARf
} O-ew%@_
int i1=l; E[2m&3&
int i2=mid+1; N^#ZJoR
for(int cur=l;cur<=r;cur++){ V^7V[(~`
if(i1==mid+1) bt"W(m&f
data[cur]=temp[i2++]; Q;[,Q~c[u
else if(i2>r) `e(c^z#
data[cur]=temp[i1++]; qOe+ZAJ{%N
else if(temp[i1] data[cur]=temp[i1++]; H;?{BV
else j.C`U(n}`
data[cur]=temp[i2++]; :9O#ObFR
} {E p0TVj`
} A'j;\ `1
ql<i]Y
} cWEE%
a;rdQ>
改进后的归并排序: @>d*H75
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package org.rut.util.algorithm.support; KX!T8+Y
= 6tHsN23
import org.rut.util.algorithm.SortUtil; %dRo^E1p
5\N(PL
/** iWei
* @author treeroot O}tZ - 'T
* @since 2006-2-2 VO,!x~S!
* @version 1.0 ZRv*!n(Ug<
*/ D!Q">6_"z
public class ImprovedMergeSort implements SortUtil.Sort { CKtB-a
&+a9+y
private static final int THRESHOLD = 10; Fw/6?:C}O6
C+?Hm1
/* 1LqoF{S:
* (non-Javadoc) Ipf|")*
* !,l9@eJQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,LTH;<zB)
*/ VGfMN|h
public void sort(int[] data) { d_AK`wR
int[] temp=new int[data.length]; yW+yg{Gg:
mergeSort(data,temp,0,data.length-1); +!k&Yje
} H9KKed47d/
3 j!3E
private void mergeSort(int[] data, int[] temp, int l, int r) { nIAx2dh?
int i, j, k; 8yRJD[/S
int mid = (l + r) / 2; m$`RcwO
if (l == r) 6Se?sHC>
return; V_>\9m
if ((mid - l) >= THRESHOLD) ji1viv
mergeSort(data, temp, l, mid); sJ#4(r`
else /|r^W\DV&x
insertSort(data, l, mid - l + 1); =7-9[{
if ((r - mid) > THRESHOLD) j;%-fvd;
mergeSort(data, temp, mid + 1, r); oE<`VY|
else Wc,_RN-
insertSort(data, mid + 1, r - mid); x1Lb*3Fe
LG-y]4a}
for (i = l; i <= mid; i++) { wQv'8A_}
temp = data; ie;]/va
} rW0kA1=E
for (j = 1; j <= r - mid; j++) { ZZWD8AX
temp[r - j + 1] = data[j + mid]; cnSJ{T
} sqla}~CiX
int a = temp[l]; V7GRA#|
int b = temp[r]; flk=>h|
for (i = l, j = r, k = l; k <= r; k++) { rJPb 3F
if (a < b) { K2he4<
data[k] = temp[i++]; 6^%UU o%
a = temp; N<f"]
} else { @WJgWJm
data[k] = temp[j--]; /nyUG^5#{
b = temp[j]; 4S,`bnmB
} ^cV;~&|.Xk
} [!!o-9b
} if}-_E<F
wkP#Z"A0~
/** (2$( ?-M
* @param data I{ HN67O
* @param l aki_RG>U'
* @param i HKF H/eV
*/ Kpb#K[(]&
private void insertSort(int[] data, int start, int len) { =fu :@+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w<zIAQN
} Ks=>K(V6
} h lkn%
} W;_nK4$%'
} [OHxonU
|\QgX%
堆排序： Rz(QC\(
9!T[Z/}T
package org.rut.util.algorithm.support; *j]9vktH
eL^.,H0
import org.rut.util.algorithm.SortUtil; M9EfU
Lk~ho?^`
/** OTC!wI g
* @author treeroot K|Ld,bq
* @since 2006-2-2 pcau}5 .
* @version 1.0 !g Z67
*/ thV>j9'
public class HeapSort implements SortUtil.Sort{ RMX:9aQ3F
6;C3RU]
/* (non-Javadoc) UQ'\7OS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #~SP)Ukp
*/ 1=#q5dZ]
public void sort(int[] data) { 7#@cz5Su
MaxHeap h=new MaxHeap(); S?RN?1
h.init(data); cj+ FRG~u
for(int i=0;i h.remove(); j]*j}%hz
System.arraycopy(h.queue,1,data,0,data.length); 9&upujVS
} f&}k^>N#3
+SsK21f"r
private static class MaxHeap{ m0LTx\w!
|3F02
void init(int[] data){ A6GE,FhsG
this.queue=new int[data.length+1]; +u!0rLb
for(int i=0;i queue[++size]=data; XS`M-{f`
fixUp(size); s >e=?W
} Wi[~fI8^!
} "J+3w
~2<7ZtV=
private int size=0; ]d,S749(s
>2~+.WePu
private int[] queue; uvtF_P/
lrnyk(M}Q.
public int get() { *F ?8c
return queue[1]; U"q/rcA
} )E6;-rD0^+
b`)){LR
public void remove() { m_=$0m J$
SortUtil.swap(queue,1,size--); ^dP KDrKxh
fixDown(1); *:>"q ej
} mocI&=EF2X
file://fixdown D@.tkzU@E
private void fixDown(int k) { 7h6,c/<
int j; VUVaaOmO
while ((j = k << 1) <= size) { Ynp{u`?
if (j < size %26amp;%26amp; queue[j] j++; ,oaw0Vw
if (queue[k]>queue[j]) file://不用交换 &C_'p{G
break; AFc$%\s4
SortUtil.swap(queue,j,k); 0TN;86Mo
k = j; p[<Dk$7K
} QFg sq{
} 0GB:GBhZ
private void fixUp(int k) { =i_-F$pV
while (k > 1) { v3}L`dyh3
int j = k >> 1; Hu.t 3:w
if (queue[j]>queue[k]) ]4h92\\965
break; SV:4GVf
SortUtil.swap(queue,j,k); HHq_P/'
k = j; G2t;DN(
} (4'$y`Z
} 'rMN=1:iu"
g)s{IAVx
} BYs-V:
c7tfRq n+
} zunV<2~(2}
B*4}GPQ
SortUtil： x%+aKZ(m)
?_"+^R z
package org.rut.util.algorithm; j7sKsbb
0G7K8`a
import org.rut.util.algorithm.support.BubbleSort; \2ZPj)&-E
import org.rut.util.algorithm.support.HeapSort; si&S%4(
import org.rut.util.algorithm.support.ImprovedMergeSort; ]xX$<@HR
import org.rut.util.algorithm.support.ImprovedQuickSort; 0KMctPT]p
import org.rut.util.algorithm.support.InsertSort; 9Xl`pEhC
import org.rut.util.algorithm.support.MergeSort; y]J89
import org.rut.util.algorithm.support.QuickSort; WcHgBbNe
import org.rut.util.algorithm.support.SelectionSort; eFpTW&9n
import org.rut.util.algorithm.support.ShellSort; h3*Zfl<]
3pK*~VK
/** L:_bg8eD#
* @author treeroot u:m]CPz
* @since 2006-2-2 Z9575CI<
* @version 1.0 9:`(Q3Ei
*/ *Ho/ZYj3
public class SortUtil { (T!9SU
public final static int INSERT = 1; BNd^qB ?
public final static int BUBBLE = 2; \e!vj.PU
public final static int SELECTION = 3; Ku\Y'ub
public final static int SHELL = 4; 0A,]$Fzt
public final static int QUICK = 5; F)s{PCl
public final static int IMPROVED_QUICK = 6; w3=%*<
public final static int MERGE = 7; AtF3%Zv2
public final static int IMPROVED_MERGE = 8; pGf@z:^{*-
public final static int HEAP = 9; {e+-vl
v2H#=E4cZ#
public static void sort(int[] data) { TF 'U
sort(data, IMPROVED_QUICK); <$F\Nk|x
} KN tt
private static String[] name={ cx}Q2S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $/=nU*pd
}; 4m*M,#mV
GN!qyT
private static Sort[] impl=new Sort[]{ F)+{AQL
new InsertSort(), d}JP!xf%
new BubbleSort(), 6KVnnK
new SelectionSort(), /ODXV`3QYI
new ShellSort(), mp9{m`Jb*
new QuickSort(), IkrF/$r
new ImprovedQuickSort(), u0#}9UKQ
new MergeSort(), H ,+? t
new ImprovedMergeSort(), *+uHQgn(
new HeapSort() !-N6l6N
}; X66VU
?0YCpn
public static String toString(int algorithm){ x.3J[=z=>
return name[algorithm-1]; 0pJ ":Q/2)
} ZTU&,1Y;
rAs,X
public static void sort(int[] data, int algorithm) { QHWBAGA
impl[algorithm-1].sort(data); Pb8^ b
} $<^u^q37u
"Kc>dJ@W
public static interface Sort { wMdal:n^
public void sort(int[] data); GrTulN?
} `)T~psT
es>W$QKlo
public static void swap(int[] data, int i, int j) { yv\#8I:qh
int temp = data; 9*E7}b,
data = data[j]; a)S+8uU
data[j] = temp; ]~6_WE8L
} $Bj;D=d@V
} ^2$ lJ