[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; A"qDc
} JSylQ201
int i1=l; Q t>|TGz
int i2=mid+1; u] G
for(int cur=l;cur<=r;cur++){ p<mBC2!%
if(i1==mid+1) '~7zeZ'
data[cur]=temp[i2++]; PQ;9iv
else if(i2>r) eHIcfp@&
data[cur]=temp[i1++]; \J#&]o)Y
else if(temp[i1] data[cur]=temp[i1++]; |#BN!kc
else b5.]}>]t
data[cur]=temp[i2++]; |+[Y_j
} b>#=7;
} ]Nssn\X7
E{^W-
} f)Y~F/[$P
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改进后的归并排序: %h,&ND
5yj#9H
package org.rut.util.algorithm.support; UKTfLh
@w(|d<5l:L
import org.rut.util.algorithm.SortUtil; ^B}q@/KV
mQSn*;9\T3
/** 5G`fVsb
* @author treeroot a2]ZYY`R7
* @since 2006-2-2 A>mk0P)~Q
* @version 1.0 FJKlqM5]
*/ 19[!9ci
public class ImprovedMergeSort implements SortUtil.Sort { DSq?|H
D#`>p
private static final int THRESHOLD = 10; Jp^#G2
}L%2K"8?}
/* 4b,+;
* (non-Javadoc) oIj-Y`92!
* =&Tuh}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "(dI/}
*/ 8GjETq%}
public void sort(int[] data) { u]`0QxvZ
int[] temp=new int[data.length]; yh|+Usa
mergeSort(data,temp,0,data.length-1); 9:=:P>
} 3^$=XrD
E'6/@xM
private void mergeSort(int[] data, int[] temp, int l, int r) { i\DU<lD5VN
int i, j, k; C?W}/r[
int mid = (l + r) / 2; 1{a4zGE?[
if (l == r) p8?"}
return; nqTOAL9FF
if ((mid - l) >= THRESHOLD) ;i/? fw[h
mergeSort(data, temp, l, mid); ZSD7%gE<D
else oQ*LP{M
insertSort(data, l, mid - l + 1); tGbx/$Y
if ((r - mid) > THRESHOLD) BJ'pe[Xa5
mergeSort(data, temp, mid + 1, r); Y%|dM/a`
else 0V^I.S/q
insertSort(data, mid + 1, r - mid); 4gVIuF*pS
.!i`YT*jF
for (i = l; i <= mid; i++) { wa`c3PQGu
temp = data; >p;&AaXkoG
} ;KEie@Ry
for (j = 1; j <= r - mid; j++) { 28c6~*Te#
temp[r - j + 1] = data[j + mid]; e{XzUY6
} Rh$+9w
int a = temp[l]; y7rT[f/J
int b = temp[r]; s aHY9{)
for (i = l, j = r, k = l; k <= r; k++) { BgDWl{pm
if (a < b) { x%[NK[^&
data[k] = temp[i++]; hsYE&Np_Q
a = temp; UlNV%34"
} else { mI:^lp
data[k] = temp[j--]; R7!v=X]i
b = temp[j]; ?2\oi*$
} Qgv g*KX
} D/;[x{;E
} QP%Hwt]+
oe3=QE
/** 8|L@-F
* @param data pjoyMHWK
* @param l loE;q}^
* @param i esQ`6i
*/ UWK|_RT6SA
private void insertSort(int[] data, int start, int len) { kCoE;)y$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GK3T w
} kg7bZ
} '.>y'=
} gN73)uJ0
} D`'Cnt/
qK2jJ3)>
堆排序： Hi/[
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package org.rut.util.algorithm.support; :O,r3O6
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import org.rut.util.algorithm.SortUtil; ;_|4c7
6U$e;cr6
/** \Y8 sIs
* @author treeroot ]sE)-8
* @since 2006-2-2 @3=q9ftm
* @version 1.0 yJ ljCu)f
*/ SyT{k\[
public class HeapSort implements SortUtil.Sort{ P>_9>k@;Q
q@;1{
/* (non-Javadoc) ("}C& 6)cB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9k6/D.Dz
*/ uqa pj("
public void sort(int[] data) { BIew\N
MaxHeap h=new MaxHeap(); V}7)>i$A
h.init(data); bhbTloCR
for(int i=0;i h.remove(); w:iMrQeJg
System.arraycopy(h.queue,1,data,0,data.length); r ?<kWR?w
} Gr)G-zE
'jO8C2Th%
private static class MaxHeap{ l]Xbd{
B4*y-Q.*
void init(int[] data){ xO<%lq`
this.queue=new int[data.length+1]; !_~/Y/M
for(int i=0;i queue[++size]=data; _5(1T%K)
fixUp(size); @uN+]e+3
} >H5t,FfQL
} ocMTTVo
v0=v1G*rvJ
private int size=0; c#1kg@q@
~RwoktO
private int[] queue; suW|hh1/Ya
)C{20_
public int get() { v^F00@2I
return queue[1]; )R?uzX^qf
} >j$aY
+Wy`X5v
public void remove() { *PB/I4>{
SortUtil.swap(queue,1,size--); BS,EW
fixDown(1); &5bIM>)v
} @Bjp7v:w
file://fixdown uudd'L
private void fixDown(int k) { J7%rPJ
int j; 6gO( 8
while ((j = k << 1) <= size) { GO@<?>K
if (j < size %26amp;%26amp; queue[j] j++; m']$)Iqw
if (queue[k]>queue[j]) file://不用交换 }u$c*}
break; dTu*%S1Z
SortUtil.swap(queue,j,k); JKO*bbj
k = j; 5[r}'08b
} }LQV2 hKTG
} &)JoB
private void fixUp(int k) { < 3*q) VT
while (k > 1) { S')DAx
int j = k >> 1; 6#K.n&=*
if (queue[j]>queue[k]) {<gX~./]c
break; e{Vn{.i,5
SortUtil.swap(queue,j,k); ,F`1VpTd8
k = j; Soe2Gq
} >.9V`m|
} &V SZ
Kb;Pd!Q
} wgolgof
r&+C%
} 9(}d7y
M8\/[R\
SortUtil： v@8SMOe%
8'bZR]
package org.rut.util.algorithm; 9IrCu?n9b
Mqk|H~l5c
import org.rut.util.algorithm.support.BubbleSort; 9 BU#THDm
import org.rut.util.algorithm.support.HeapSort; Eyk:pnKJb
import org.rut.util.algorithm.support.ImprovedMergeSort; }NGP!
import org.rut.util.algorithm.support.ImprovedQuickSort; x?u@ j7[
import org.rut.util.algorithm.support.InsertSort; S?a4IK
import org.rut.util.algorithm.support.MergeSort; iC^91!<
import org.rut.util.algorithm.support.QuickSort; w`+-xT%
import org.rut.util.algorithm.support.SelectionSort; v*.iNA;&i
import org.rut.util.algorithm.support.ShellSort; <RbfW'<G
V?)V2>]
/** w9RBT(u
* @author treeroot &+ PVY>q
* @since 2006-2-2 MZcvr9y
* @version 1.0 Y8IC4:EO
*/ J|be'V#]1
public class SortUtil { #902x*Z'c"
public final static int INSERT = 1; R+e)TR7+
public final static int BUBBLE = 2; Dd/]?4
public final static int SELECTION = 3; re#]zc<
public final static int SHELL = 4; h05FR[</
public final static int QUICK = 5; =ud~
public final static int IMPROVED_QUICK = 6; %hZX XpuO
public final static int MERGE = 7; kq?:<!z
public final static int IMPROVED_MERGE = 8; 3PL0bejaT7
public final static int HEAP = 9; }lhk;#r
>=:mtcph
public static void sort(int[] data) { M6qNh`+HO
sort(data, IMPROVED_QUICK); G,^ ?qbHg
} m^m=/'<+
private static String[] name={ *icaKy3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" n+Conp/
}; 9mv0}I
%{cVG-<_iz
private static Sort[] impl=new Sort[]{ :V#xrH8R
new InsertSort(), omy3<6
new BubbleSort(), iyr8*L\
new SelectionSort(), 99By.+~pX
new ShellSort(), )\2KDXc
new QuickSort(), /38I(0
new ImprovedQuickSort(), 77aUuP7Iw
new MergeSort(), n_LK8
new ImprovedMergeSort(), TvT>UBqj=
new HeapSort() 3B,dL|q(@J
}; Bz>f
,3MHZPJ?k]
public static String toString(int algorithm){ 6@FhDj2X
return name[algorithm-1]; On!+7is'
} 5`Uzxu
DKem;_6OQ
public static void sort(int[] data, int algorithm) { /YJBRU2
impl[algorithm-1].sort(data); J&JZYuuf
} @W @,8e]c
zw$\d1-+h
public static interface Sort { 3="vOSJ6&
public void sort(int[] data); B^zg#x#8
} oTXIs4+G
n<> ^cD
public static void swap(int[] data, int i, int j) { w\N\J^5,Q
int temp = data; ^4Xsdh5
data = data[j]; TqV^\C?
data[j] = temp; $dK430_B
} 0]MD?6-
} L ed{#+