[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; fOVRtSls
} z?PF9QL1
int i1=l; >L%%B-
int i2=mid+1; DxlX-
for(int cur=l;cur<=r;cur++){ {)mlXo(On
if(i1==mid+1) :|a[6Uwl\V
data[cur]=temp[i2++]; ydt1ED0Q-
else if(i2>r) <$ 5\^y,V
data[cur]=temp[i1++]; 3r\QLIr L8
else if(temp[i1] data[cur]=temp[i1++]; ZU`"^FQ3A
else P1t5-q
data[cur]=temp[i2++]; '&9b*u";x(
} [Mi~4b
} {T.VB~C
S'txY\
} R`c5-0A
Yr+&|;DB
改进后的归并排序: n#*cVB81
f =Nm2(e
package org.rut.util.algorithm.support; T4[eBO
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import org.rut.util.algorithm.SortUtil; 6[cMPp x
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/** CV k8MA
* @author treeroot O'k"6sBb
* @since 2006-2-2 b#sO1MXv
* @version 1.0 ZM"t.
*/ OHU(?TBo
public class ImprovedMergeSort implements SortUtil.Sort { >a<;)K^1
>(3y(1;
private static final int THRESHOLD = 10; ;/v^@
u>BR WN
/* u%FA.
* (non-Javadoc) PYZ8@G
* {0?76|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %:NI@59
*/ V{][{5SR
public void sort(int[] data) { 1peN@Yk2W
int[] temp=new int[data.length]; ^dro*a,
mergeSort(data,temp,0,data.length-1); /#tOi[0[
} b{A#P?
mwt3EV5
private void mergeSort(int[] data, int[] temp, int l, int r) { K$4Ky&89
int i, j, k; Ae"B]Cxb_X
int mid = (l + r) / 2; ]]+"`t,-
if (l == r) O?@AnkOhn
return; s^cHR1^
if ((mid - l) >= THRESHOLD) 8qT/1b
mergeSort(data, temp, l, mid); ;yr'K
else "zugnim
insertSort(data, l, mid - l + 1); ?n}L+|
if ((r - mid) > THRESHOLD) %NvY~,
mergeSort(data, temp, mid + 1, r); BwR)--75
else IMj{n.y4
insertSort(data, mid + 1, r - mid); ;*8$BuD
i]P]o)
for (i = l; i <= mid; i++) { Yv>% 5`
temp = data; =dPrG=A
} +S$x}b'5q
for (j = 1; j <= r - mid; j++) { ]c08`
temp[r - j + 1] = data[j + mid]; v''$qMQ)
} \QVL%,.%M
int a = temp[l]; 8{AzB8xp
int b = temp[r]; 'Ag?#vB
for (i = l, j = r, k = l; k <= r; k++) { G=DRz F
if (a < b) { p?5zwdX+`
data[k] = temp[i++]; "_lSw3
a = temp; ?Pa5skqR
} else { I'JFt>]
data[k] = temp[j--]; `U(FdT
b = temp[j]; kxh $R>
} 9Z}-%Z[,)
} D ,nF0p
} Up~#]X
&U:;jlST9
/** $aEL>,X
* @param data \]zHM.E1
* @param l u-D%: lz85
* @param i LBTf}T\
*/ iNcB6,++
private void insertSort(int[] data, int start, int len) { BPW2WSm@<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U2;_{n*g%
} WmeV[iI
} {$Qw]?Yv
} W 5-=,t
} EsdA%`
d4~!d>{n|c
堆排序： ZjWI~"]
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package org.rut.util.algorithm.support; #}o*1
}5`Kn}rY
import org.rut.util.algorithm.SortUtil; L^dF )y?
Y-v6xUc{F
/** (m13 ong
* @author treeroot `j9 ;9^
* @since 2006-2-2 A2..gs/
* @version 1.0 arm26YA-,
*/ X-=49)
public class HeapSort implements SortUtil.Sort{ fTMn
EW]rD
/* (non-Javadoc) #V@[<S2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4PR!OB
*/ Lc=t,=OhGe
public void sort(int[] data) { m;'ebkq
MaxHeap h=new MaxHeap(); L\aG.\
h.init(data); )m|)cLT&
for(int i=0;i h.remove(); wZ0RI{)s'
System.arraycopy(h.queue,1,data,0,data.length); UZz/v#y~
} `fS$@{YI_
]@0C1r
private static class MaxHeap{ )1N~-VuT
y2KR^/LN|Y
void init(int[] data){ 7*.nd
this.queue=new int[data.length+1]; h:xvnyaI
for(int i=0;i queue[++size]=data; <v%Q|r
fixUp(size); -V7dSi
} wt]onve}%
} Z):q1:y
MR}=tO
private int size=0; ~7ZWtg;B
x.8fxogz
private int[] queue; ew?4;
"Doz~R\\
public int get() { 1R-WJph
return queue[1]; 7_HFQT1.N
} ^VOFkUp)
evjj~xkte
public void remove() { sFt"2TVr3
SortUtil.swap(queue,1,size--); l|v`B6(
fixDown(1); S"HdjEF7\
} I'}&s|6
file://fixdown JVydTvc
private void fixDown(int k) { Q`kV| pjg
int j; IK1'" S|
while ((j = k << 1) <= size) { nvbzCtC
if (j < size %26amp;%26amp; queue[j] j++; jl9hFubwW
if (queue[k]>queue[j]) file://不用交换 TXdo,DPv7
break; !y+uQ_IS@
SortUtil.swap(queue,j,k); x n?$@
k = j; 4( $p8J
} MQ#k`b#()
} 2)hfYLi
private void fixUp(int k) { YO&@
while (k > 1) { ]n}aePl}oU
int j = k >> 1; SP.k]@P
if (queue[j]>queue[k]) 0RgE~x!hI
break; F_G .$aCc
SortUtil.swap(queue,j,k); fJOwE g|
k = j; b+1!qNuCW#
} 1%ENgb:8
} L+N\B@ 0-
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} w p\-LO~
Qp7h|<
} 1J([*)
=WT&unw}
SortUtil： o%7-<\qS
Jr5dw=B gw
package org.rut.util.algorithm; CFC15/yU
1*" 7q9x
import org.rut.util.algorithm.support.BubbleSort; F/x2}'
import org.rut.util.algorithm.support.HeapSort; 4O<sE@X
import org.rut.util.algorithm.support.ImprovedMergeSort; R:4@a ':H
import org.rut.util.algorithm.support.ImprovedQuickSort; 'i',M+0>jC
import org.rut.util.algorithm.support.InsertSort; S/"G=^~
import org.rut.util.algorithm.support.MergeSort; 7r&lW<:>
import org.rut.util.algorithm.support.QuickSort; {xx}xib3
import org.rut.util.algorithm.support.SelectionSort; "}MP{/
import org.rut.util.algorithm.support.ShellSort; v*[UG^+)
47N,jVt4
/** _K}q%In
* @author treeroot nrHC;R.nE
* @since 2006-2-2 aq)g&.dw?
* @version 1.0 , #=TputM
*/ s_ t/
public class SortUtil { C~egF=w
public final static int INSERT = 1; ? X6M8`
public final static int BUBBLE = 2; r0!')?#Z
public final static int SELECTION = 3; f0vO(@I
public final static int SHELL = 4; l^Ob60)2
public final static int QUICK = 5; 793 15A
public final static int IMPROVED_QUICK = 6; >TMd1?,
public final static int MERGE = 7; )$RV)
public final static int IMPROVED_MERGE = 8; (<YBvpt4>
public final static int HEAP = 9; ^D<CoxG
}f;WYz5
public static void sort(int[] data) { /{f"0]-RA
sort(data, IMPROVED_QUICK); Qo)Da}uo20
} &Ts!#OcB,
private static String[] name={ !m^;wkrY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" GF6o
}; $33E-^
Q7rBc wm5
private static Sort[] impl=new Sort[]{ qCg<g
new InsertSort(), (>vyWd]
new BubbleSort(), O 2-n-
new SelectionSort(), 6#7hMQ0&;O
new ShellSort(), H1f='k]SZ
new QuickSort(), w i[9RD@
new ImprovedQuickSort(), i,h30J
new MergeSort(), ULqI]k(
new ImprovedMergeSort(), Q66 +
new HeapSort() cef[T(>
}; +N=HI1^54R
"]#Ij6ml
public static String toString(int algorithm){ t5%cpkgh4
return name[algorithm-1]; <4+P37^~
} T:u>7?8o
s]%Cz\
public static void sort(int[] data, int algorithm) { f[1cN`|z
impl[algorithm-1].sort(data); E/g"}yR
} s>m2qSu
`Jk0jj6Z
public static interface Sort { VxBBZsZO~
public void sort(int[] data); ;+<IWDo
} }%p:Xv@X!
I%u 2 ce
public static void swap(int[] data, int i, int j) { "Yh;3tI4*
int temp = data; GQ;0KIN
data = data[j]; @oE 5JM
data[j] = temp; xRe`Duy:
} #m,H1YH M
} `0\Z*^>