[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; ve%l({
} .&(8(C
int i1=l; GYqJ!,
int i2=mid+1; |#cAsf_{
for(int cur=l;cur<=r;cur++){ @ta?&Qf)
if(i1==mid+1) 0pNo`Bm
data[cur]=temp[i2++]; 5&qY3@I7l
else if(i2>r) r|bPR!0
data[cur]=temp[i1++]; NUu;tjt:
else if(temp[i1] data[cur]=temp[i1++]; oeGS
else -aN":?8(G
data[cur]=temp[i2++]; (txt8q
} x3;jWg~'
} 0s!N@ ,T
HPTHF
} xSOoIsL[
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改进后的归并排序: 8GW ut=D
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package org.rut.util.algorithm.support; P#F_>GB
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import org.rut.util.algorithm.SortUtil; c85O_J
r8+*|$K
/** _r7=&oL.Q
* @author treeroot :o<N!*pT
* @since 2006-2-2 xcnt?%%M
* @version 1.0 1)gv%_
*/ X{s/``n
public class ImprovedMergeSort implements SortUtil.Sort { *G9 [j$
L77EbP`P
private static final int THRESHOLD = 10; s79q5
aulaX/'-_
/* h^v9|~ZJ'7
* (non-Javadoc) F*X%N_n
* 6yp+h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9Yd-m
*/ u IF$u
public void sort(int[] data) { *<?XTs<
int[] temp=new int[data.length]; RAdvIIQp:
mergeSort(data,temp,0,data.length-1); $Llvp bl
} SUo^c1)G
Xv8fPP(
private void mergeSort(int[] data, int[] temp, int l, int r) { xV?*!m$V%R
int i, j, k; U* 4{"
int mid = (l + r) / 2; u8xk]:%
if (l == r) %OuX`w=
return; v'K % %z
if ((mid - l) >= THRESHOLD) 2h5tBEOX.s
mergeSort(data, temp, l, mid); Mo~ki"9.
else v)%[
insertSort(data, l, mid - l + 1); Bmmb
if ((r - mid) > THRESHOLD) kRQ~hRT6
mergeSort(data, temp, mid + 1, r); v?FhG b~1
else xp~YIeSg
insertSort(data, mid + 1, r - mid); zU=YNrn
+tPx0>p;
for (i = l; i <= mid; i++) { a (P^e)<
temp = data; vP-3j
} F ZM2
for (j = 1; j <= r - mid; j++) { /cM 5
temp[r - j + 1] = data[j + mid]; `D4oAx d9
} 7N!tp,?
int a = temp[l]; G]1(X38[si
int b = temp[r]; Q%+}
for (i = l, j = r, k = l; k <= r; k++) { e21E_exM0
if (a < b) { fm[_@L% x
data[k] = temp[i++]; ]sf2"~v
a = temp; .@fK;/OuC
} else { };i&a%I|
data[k] = temp[j--]; 0S%tsXt+
b = temp[j]; wwo(n$!\
} ULV)0SB
} $+A%ODv
} +SAk:3.#CV
&b5T&-C<
/** >6*(}L9
* @param data ?s1u#'aO
* @param l kA;xAb+U3
* @param i q-A`/9
*/ V h Z=,m
private void insertSort(int[] data, int start, int len) { vsu@PuqH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _)OA$
} := ]sq}IN
} [q|?f?Zl
} 3Ne9%"
} HyZVr2
aQ32p4C
堆排序： ;% /6Y~/
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package org.rut.util.algorithm.support; =Jsg{vI
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import org.rut.util.algorithm.SortUtil; jl;kcGE
>{phyByI
/** -}=@ *See#
* @author treeroot $ /}:P
* @since 2006-2-2 _F}IF9{?G
* @version 1.0 WF+bN#YJ
*/ [$hptQv
public class HeapSort implements SortUtil.Sort{ 3g?MEM~
?)Tz'9l
/* (non-Javadoc) XR{5]lKt_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dH ^b)G4
*/ se<i5JsSV
public void sort(int[] data) { Y{%4F%Oy
MaxHeap h=new MaxHeap(); 8+*g4=ws
h.init(data); _7-"VoX
for(int i=0;i h.remove(); :pA=V
System.arraycopy(h.queue,1,data,0,data.length); &4mfzpK
} 9f@#SB_H
ki[;ZmQqY
private static class MaxHeap{ yRgDhA
>XD02A[
void init(int[] data){ GCf._8;%
this.queue=new int[data.length+1]; R-g>W
for(int i=0;i queue[++size]=data; _9}x2uO~
fixUp(size); 7i-W*Mb:
} k7z(Gbzu
} \j,v/C@c-
gt2>nTJz.Z
private int size=0; r6O7&Me<
A^T~@AO
private int[] queue; "<cB73tY
+XU$GSw3(
public int get() { #Qtg\X
return queue[1]; TS\A`{^T
} /o<}]]YBF
J[<D/WIH
public void remove() { SXHru Z
SortUtil.swap(queue,1,size--); 'T&=$9g7
fixDown(1); #`N6<nb
} y]z)jqX<
file://fixdown k$UzBxR
private void fixDown(int k) { Y\z^\k
int j; 6k@%+<1
while ((j = k << 1) <= size) { VurP1@e&
if (j < size %26amp;%26amp; queue[j] j++; \dp9@y[^
if (queue[k]>queue[j]) file://不用交换 -7Aw s)
break; (!XYH@Mz<w
SortUtil.swap(queue,j,k); '?vgp
k = j; s60:0>
} C]\^B6l<
} MrKU,-
private void fixUp(int k) { gJcXdv=]2
while (k > 1) { ReHd~G9
int j = k >> 1; `aO@N(
if (queue[j]>queue[k]) j &0fC!k
break; RAv RNd
SortUtil.swap(queue,j,k); QigoRB!z#9
k = j; w{:Oa7_A
} Rktn/Vi
} ^?K?\
%/6e"o
} 'n>3`1E,
b68G&z>
} Zs3]|bUR
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SortUtil： :~0^ib<v;
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package org.rut.util.algorithm; njwR~aL`|
aoakTi!}
import org.rut.util.algorithm.support.BubbleSort; &,Zz
import org.rut.util.algorithm.support.HeapSort; E-tNB{r@
import org.rut.util.algorithm.support.ImprovedMergeSort; `!Ge"JB6
import org.rut.util.algorithm.support.ImprovedQuickSort; ik1L
import org.rut.util.algorithm.support.InsertSort; T^(n+lv
import org.rut.util.algorithm.support.MergeSort; |S>J<]H p
import org.rut.util.algorithm.support.QuickSort; ,Zcx3C:#
import org.rut.util.algorithm.support.SelectionSort; :#W>SO
import org.rut.util.algorithm.support.ShellSort; @k:f}-t
Ng_rb KXC#
/** xo)?XFM2
* @author treeroot tO+%b=Z^
* @since 2006-2-2 jB/q1vFO
* @version 1.0 bKt3x+x(
*/ O%++0k;
public class SortUtil { CK!pH{n+
public final static int INSERT = 1; 5rHnU<H@y
public final static int BUBBLE = 2; G|PIH#
public final static int SELECTION = 3; $Op/5j
public final static int SHELL = 4; dn)tP6qc/
public final static int QUICK = 5; ZAo)_za&mH
public final static int IMPROVED_QUICK = 6; dS;|Kl[Om
public final static int MERGE = 7; qLW-3W;WUH
public final static int IMPROVED_MERGE = 8; .k:&&sAz
public final static int HEAP = 9; d$?n6|4
Alk* "p
public static void sort(int[] data) { >gi{x|/
sort(data, IMPROVED_QUICK); jXDzjt94J
} sm&rR=b
private static String[] name={ |_xiG~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0.Ol@fO
}; /wxxcq
{R{%Z
private static Sort[] impl=new Sort[]{ GLKN<2|2@y
new InsertSort(), ubCJZ"!
new BubbleSort(), n%ArA])_&
new SelectionSort(), E?q'|f
new ShellSort(), p2NB~t7Z
new QuickSort(), 5$"[gdt)T
new ImprovedQuickSort(), $E~Lu$|
new MergeSort(), L pi_uK
new ImprovedMergeSort(), by y1MgQd
new HeapSort() 08jUVHdt
}; 8^"|-~#<
~z1KD)^
public static String toString(int algorithm){ (b2^d
return name[algorithm-1]; VU'l~%ql
} 0!'M#'m
B3+WOf5W
public static void sort(int[] data, int algorithm) { UUEDCtF)
impl[algorithm-1].sort(data); 6exlb:
} Y)5uK:)^
MLIQ 8=
public static interface Sort { {)[g
public void sort(int[] data); zt?wn*_
} oD}FJvV
nT.2jk+
public static void swap(int[] data, int i, int j) { <C`eZ}Qqv
int temp = data; oJu4vGy0
data = data[j]; Uus)2R7
data[j] = temp; ]:#$6D"
} <fxjj
} Pk]9.e1_