[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; 0<4Swj3s7
} \NTNB9>CO
int i1=l; l99{eD
int i2=mid+1; bPhbd
for(int cur=l;cur<=r;cur++){ fd&=\~1_$
if(i1==mid+1) YjTA+1}
data[cur]=temp[i2++]; xZ.c@u6:
else if(i2>r) ^Ss4<
data[cur]=temp[i1++]; WY`hNT6M
else if(temp[i1] data[cur]=temp[i1++]; RLL2'8"A
else jxdxIkAHZc
data[cur]=temp[i2++]; 0f]LOg
} nApkK1?
} k\wcj^"cb
^a?H"
} $Eh8s(
\UR/tlw+/
改进后的归并排序: DAHQ7#qfQC
cUPC8k.1
package org.rut.util.algorithm.support; <RPy
.V'=z|
import org.rut.util.algorithm.SortUtil; ~V?3A/]
<-%OXEG
/** Ljq!\D
* @author treeroot P3u,)P&
* @since 2006-2-2 1~_&XNb&
* @version 1.0 qt&zo5
*/ c=Y8R/G<
public class ImprovedMergeSort implements SortUtil.Sort { p#6V|5~8
fD:>cje
private static final int THRESHOLD = 10; Eg;xj@S<2
SPEDN}/^
/* [ta3sEPjs
* (non-Javadoc) v<SCh)[-p
* d(>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )?qH#>mD6
*/ yDn8{uI
public void sort(int[] data) { /`"&n1
int[] temp=new int[data.length]; U2@Mxw
mergeSort(data,temp,0,data.length-1); ocbNf'W;
} m=.}}DcSs
zJCm0HLJ
private void mergeSort(int[] data, int[] temp, int l, int r) { f:6%DT~a&C
int i, j, k; 5J0Sc
int mid = (l + r) / 2; 3.vQ~Fvl
if (l == r) (}:n#|,{M
return; o 2Okc><z
if ((mid - l) >= THRESHOLD) Y#[>j4<T
mergeSort(data, temp, l, mid); bo%v(
else Bx&F*a;5
insertSort(data, l, mid - l + 1); fj,]dQT
if ((r - mid) > THRESHOLD) <z+b88D
mergeSort(data, temp, mid + 1, r); 8ta`sNy9
else sKU?"|G81G
insertSort(data, mid + 1, r - mid); ,*}5xpX
7Rix=*
for (i = l; i <= mid; i++) { x-3!sf@
temp = data; ( 8}'JvSu
} hr)CxsPoRQ
for (j = 1; j <= r - mid; j++) { sH}q&=
temp[r - j + 1] = data[j + mid]; :lGH31GG
} 2-#:Y
int a = temp[l]; <Z6tRf;B
int b = temp[r]; |m5 E%E
for (i = l, j = r, k = l; k <= r; k++) { qV`JZ\n
if (a < b) { `OP?[ f d
data[k] = temp[i++]; ?*ni5\y5o
a = temp; 'dFhZ08u}
} else { P O{1u%P
data[k] = temp[j--]; ^3:y<{J
b = temp[j]; 5f'<0D;K
} C1YG=!
} xU5+"t~
} *[MK{m
_o-lNt+
/** ])YGeY(V0+
* @param data YEB@p.
* @param l :Ky *AI
* @param i eJm7}\/6`
*/ buv*qPO
private void insertSort(int[] data, int start, int len) { ^twJNm{99
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Q'mLwD3>
} y_Tc$g~
} S5$sB{\R
} D#?jddr-
} 1; "t8.*%e
+#|):aF
堆排序： v1E=P7}\{s
djxM/"xo
package org.rut.util.algorithm.support; W18I"lHeh
,& ^vc_}
import org.rut.util.algorithm.SortUtil; xO<$xx
(3;dtp>Xx
/** .}V&*-ep
* @author treeroot cx(W{O"Jb
* @since 2006-2-2 nfV32D|3
* @version 1.0 5v uB87`
*/ U.[?1:v
public class HeapSort implements SortUtil.Sort{ V>2mzc
0B;cQSH!q
/* (non-Javadoc) s, 8a1o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jD eNCJ
*/ %%w/;o!c
public void sort(int[] data) { jW G=k#WN
MaxHeap h=new MaxHeap(); /W,K% s]
h.init(data); i(k]}Di:
for(int i=0;i h.remove(); R1%2]?
System.arraycopy(h.queue,1,data,0,data.length); {MaFv
} l6C^,xU~IX
$j\UD8Hj'-
private static class MaxHeap{ ~GWn>
h6Vm;{~
void init(int[] data){ <%2A, Vz"
this.queue=new int[data.length+1]; EpO5_T_
for(int i=0;i queue[++size]=data; t#0/_tD
fixUp(size); dK45&JHoW^
} HcrI3v|6
} ]-D;t~
1;4] HNI
private int size=0; #''q :^EQ
+[DL]e]@U
private int[] queue; bS9<LQ*
0K&\5xXM
public int get() { Viu+#J;l
return queue[1]; v.ftfL!
} ,;2x.We
J"x M[c2
public void remove() { x-e?94}^
SortUtil.swap(queue,1,size--); r95l.v
fixDown(1); "^~>aVuXf
} 7D;g\{>M
file://fixdown '<v/Gl\
private void fixDown(int k) { &$vW
int j; 73C
while ((j = k << 1) <= size) { AV0C9a/td
if (j < size %26amp;%26amp; queue[j] j++; #h 4`f
if (queue[k]>queue[j]) file://不用交换 ![v@+9
break; w;;.bz m
SortUtil.swap(queue,j,k); -cjwa-9 ~
k = j; Ikkv <uY
} Y68T&swD
} :PrQ]ss@C5
private void fixUp(int k) { !U@?Va~Zn
while (k > 1) { E,#J\)'z
int j = k >> 1; WaVP+Ap
if (queue[j]>queue[k]) 0wzq{~\{=_
break; S'I{'jP5
SortUtil.swap(queue,j,k); +N9(o+UrU
k = j; f8Xe%"<
} s57-<&@J9
} @CSTp6{y
#NAlje(7
} 95,{40;X7
*Q<%(JJ
} |$r|DX1[
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SortUtil： &DMKZMj<Q*
DO!?]"
package org.rut.util.algorithm; 31n5n
S=^a''bg
import org.rut.util.algorithm.support.BubbleSort; S)@95pb
import org.rut.util.algorithm.support.HeapSort; cNW[i"
import org.rut.util.algorithm.support.ImprovedMergeSort; P8JN m"C
import org.rut.util.algorithm.support.ImprovedQuickSort; 0@9.h{s@
import org.rut.util.algorithm.support.InsertSort; uM8YY[b
import org.rut.util.algorithm.support.MergeSort; *S).@j\{W
import org.rut.util.algorithm.support.QuickSort; BVx: JiA
import org.rut.util.algorithm.support.SelectionSort; (]|rxmycA
import org.rut.util.algorithm.support.ShellSort; #!?5^O
|/?)u$U<
/** rKDMIECrm
* @author treeroot 2Et7o/\<
* @since 2006-2-2 k-LB %\p
* @version 1.0 m,e@bJ-
*/ !!=%ty
public class SortUtil { ):. +u=
public final static int INSERT = 1; S.9ki<
public final static int BUBBLE = 2; qp-/S^%
public final static int SELECTION = 3; lg0iNc!
public final static int SHELL = 4; C^@~
public final static int QUICK = 5; R~,*W1G6sF
public final static int IMPROVED_QUICK = 6; "RG.27
public final static int MERGE = 7; vG'JMzAm
public final static int IMPROVED_MERGE = 8; Vo%MG.IPB
public final static int HEAP = 9; F<y5zqGy@
%bnDxCj"
public static void sort(int[] data) { =TDK$Ek
sort(data, IMPROVED_QUICK); BfLh%XC
} qY24Y
private static String[] name={ >Xq:?}-m2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +"!,rZ7,A
}; _5^p+
V`KXfY
private static Sort[] impl=new Sort[]{ U@<>2
new InsertSort(), Ix,`lFbH
new BubbleSort(), N#')Qz:P
new SelectionSort(), Go}C{(4T
new ShellSort(), I$4GM
new QuickSort(), _LV;q! /j
new ImprovedQuickSort(), =Tf uwhV
new MergeSort(), af]&3(33
new ImprovedMergeSort(), *`:zSnu
new HeapSort() iPMI$
}; xf8C$|,
zof>S>5>R7
public static String toString(int algorithm){ A f@IsCOJ
return name[algorithm-1]; 1"r6qYN!>
} }bG|(Wp9
nT0FonK>
public static void sort(int[] data, int algorithm) { W@w#A]
impl[algorithm-1].sort(data); o$4n D#P3
} L Ty[)
bz[+g,e2oA
public static interface Sort { +Io[o6*
public void sort(int[] data); NTk"W!<Cl2
} {]~b^=qE$
dZ&/Iz
public static void swap(int[] data, int i, int j) { odPq<'V|AY
int temp = data; [-cYFdt"V
data = data[j]; +*3\C!
data[j] = temp; 317Lv \[
} vcsi@!
} 00'R1q4