[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; #zKF/H|_R
} -;U3$[T,J7
int i1=l; yQ+C}8r5
int i2=mid+1; lR3JyYY{X
for(int cur=l;cur<=r;cur++){ J,^eq@(
if(i1==mid+1) 6n'XRfQp)&
data[cur]=temp[i2++]; vLh,dzuo
else if(i2>r) /N`E4bKBR
data[cur]=temp[i1++]; k&3'[&$I*,
else if(temp[i1] data[cur]=temp[i1++]; 'q{|p+
else |I=\+P}s
data[cur]=temp[i2++]; )-d&XN7
} B#(2,j7M
} e[J0+ x#;r
8}Su7v1
} ZTP&*+d
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改进后的归并排序: G1:2MPH
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package org.rut.util.algorithm.support; ;Z}V}B
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import org.rut.util.algorithm.SortUtil; O$ ;:5zT
xZ(VvINL'
/** 6IC/~Woghx
* @author treeroot /(skIvE|
* @since 2006-2-2 !_=3Dz
* @version 1.0 ]0)=0pc]E
*/ (Y?"L_pC
public class ImprovedMergeSort implements SortUtil.Sort { [<7Vv_\Q
dtUt2r)6L;
private static final int THRESHOLD = 10; B$%7U><'
6"U)d7^
/* |DMa2}%
* (non-Javadoc) w(vda0
* K~aIY0=<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t /CE,DQ
*/ cdfvc0
public void sort(int[] data) { &l NHNu[
int[] temp=new int[data.length]; IBr|A
mergeSort(data,temp,0,data.length-1); 4).>b3OhX
} ~F9WR5}]
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private void mergeSort(int[] data, int[] temp, int l, int r) { p;m2RHYF
int i, j, k; 7ezf.[{R
int mid = (l + r) / 2; l/w<R
if (l == r) kKRZ79"7s
return; _<1uO=km6
if ((mid - l) >= THRESHOLD) o]|a5.O
mergeSort(data, temp, l, mid); ^gD%#3>X
else 5KFd/9
insertSort(data, l, mid - l + 1); =e$6o2!'}
if ((r - mid) > THRESHOLD) eb>YvC
mergeSort(data, temp, mid + 1, r); e(m#elX
else = A;B-_c
insertSort(data, mid + 1, r - mid); ghd*EXrF H
1f^4J~{
for (i = l; i <= mid; i++) { C) "|sG
temp = data; *R^ulp[W
} h_Cac@F0
for (j = 1; j <= r - mid; j++) { -(fvb
temp[r - j + 1] = data[j + mid]; '@<aS?@!t
} pu +"bq
int a = temp[l]; aPMqJ#fIr
int b = temp[r]; aD:vNX
for (i = l, j = r, k = l; k <= r; k++) { KW.QVBuVO#
if (a < b) { +]%d'h
data[k] = temp[i++]; 30v 3C7o=
a = temp; uZ(j"y
} else { vQpR0IEf]e
data[k] = temp[j--]; idr,s\$>
b = temp[j]; `Vqpo/
} Q}MS $[y
} Ll !J!{
} F!;0eS"xp
A+lP]Oy0S
/** Qpc+1{BQ
* @param data &S"ojbb
* @param l /U#{6zeM[,
* @param i JS<4%@
*/ d= -/'_'
private void insertSort(int[] data, int start, int len) { $6XCHVx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {D jz']
} d M&BnI
} '<C I^5^
} |NcfR"[c
} Y(4#b`k3
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堆排序： Ex ?)FL$4
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package org.rut.util.algorithm.support; IZ;%lV7t
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import org.rut.util.algorithm.SortUtil; 1YA_`_@w
/?jAG3"
/** 4 }l,F
* @author treeroot r2T-=XWB
* @since 2006-2-2 / W}Za&]
* @version 1.0 }7Si2S
*/ 1X4v:rI
public class HeapSort implements SortUtil.Sort{ #qk A*WP
#`C;@#xr
/* (non-Javadoc) Z%Nl<i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L!7*U.+
*/ qF{u+Ms
public void sort(int[] data) { 8}0W_CU,
MaxHeap h=new MaxHeap(); !Q`GA<ikv
h.init(data); J>P{8Aw
for(int i=0;i h.remove(); #L{QnV.3
System.arraycopy(h.queue,1,data,0,data.length); OgNt"Vg
} >Rw[x
f!~gfnn
private static class MaxHeap{ =>Vo|LBoe
)POuH*j
void init(int[] data){ r[zxb0YA
this.queue=new int[data.length+1]; &WIiw$@
for(int i=0;i queue[++size]=data; )~<8j
fixUp(size); .,pGW8Js
} >ln%3=
} 9d4PH
dlC)&Ai
private int size=0; zLlu%Oc
M?4)U"_VE
private int[] queue; Vc3tKuMsiX
kL,{H~iq;
public int get() { Memz>uux
return queue[1]; H'E>QT
} AlNiqnZ
_yyQ^M/
public void remove() { Gw*n,*pz
SortUtil.swap(queue,1,size--); :0.Z/s -
fixDown(1); adh=Kp e!w
} /a\6&Eb
file://fixdown yAoJ?<4^W
private void fixDown(int k) { :luVsQ
int j; h5&l#>8&
while ((j = k << 1) <= size) { AHP_B&s,Qe
if (j < size %26amp;%26amp; queue[j] j++; ?5nF` [rx
if (queue[k]>queue[j]) file://不用交换 e%&2tf4
break; }u&.n pc
SortUtil.swap(queue,j,k); ewqfs/
k = j; ^0R.U+?+
} <8[BB7
} BhkJ>4#
private void fixUp(int k) { .N8AkQ(Ok
while (k > 1) { <jT6|2'
int j = k >> 1; K*Zf^g m
if (queue[j]>queue[k]) #CoJ S[t
break; %^m6Q!
SortUtil.swap(queue,j,k); &dZ-}. af
k = j; :04sB]H
} "P=OpFV
} +?n81|7`
1vBR\!d?7
} eOjoxnD-$
R:98'`X=
} D[m;rcl
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SortUtil： >&tPIrz
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package org.rut.util.algorithm; _niXl&C
-:`$8/A|
import org.rut.util.algorithm.support.BubbleSort; o&1ewE(O]
import org.rut.util.algorithm.support.HeapSort; '$W@I
import org.rut.util.algorithm.support.ImprovedMergeSort; s)#FqB8
import org.rut.util.algorithm.support.ImprovedQuickSort; &IM;Yl
import org.rut.util.algorithm.support.InsertSort; (Bd8@}\u_
import org.rut.util.algorithm.support.MergeSort; NH$a:>
import org.rut.util.algorithm.support.QuickSort; SsfnBCVR
import org.rut.util.algorithm.support.SelectionSort; tK6z#)
import org.rut.util.algorithm.support.ShellSort; d6-a\]gF
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/** Zf |%t
* @author treeroot kt.z,<w5O
* @since 2006-2-2 W~+ ] 7<
* @version 1.0 1q<BYc+z
*/ LY[XPV]t
public class SortUtil { 40N8?kQ}?
public final static int INSERT = 1; 5BCXI8Ox9x
public final static int BUBBLE = 2; 7y:%^sl
public final static int SELECTION = 3; [f}YXQ0N)
public final static int SHELL = 4; mOr>*uR
public final static int QUICK = 5; Cfu]umZLn
public final static int IMPROVED_QUICK = 6; tgH@|Kg
public final static int MERGE = 7; [s$vY~_
public final static int IMPROVED_MERGE = 8; q'77BRD3
public final static int HEAP = 9; O^48c$Apv
x):cirwkl
public static void sort(int[] data) { ~;k-/Z"
sort(data, IMPROVED_QUICK); 7udMF3;>
} Vm6G5QwM
private static String[] name={ H#x=eDU|k
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \Q<c Y<
}; 7OX5"u!2
PI(;t9]b
private static Sort[] impl=new Sort[]{ e.jrX;;$!&
new InsertSort(), X[:Hp`_$
new BubbleSort(), .w\AyXp
new SelectionSort(), e5_a.c
new ShellSort(), U7O~ch[,
new QuickSort(), Bs(\e^}
new ImprovedQuickSort(), m!5P5U x
new MergeSort(), 5v"QKI
new ImprovedMergeSort(), YU.aZdA&V3
new HeapSort() s~$ZTzV
}; f/RzE
5mUHk]W
public static String toString(int algorithm){ f4)fa yAVp
return name[algorithm-1]; 1X2MhV
} Tz3 L#0:j
9 o6ig>C
public static void sort(int[] data, int algorithm) { 9F)+p7VJq
impl[algorithm-1].sort(data); n#XiCo_\
} &{NN!X
g-"@%ps
public static interface Sort { x zu)``?
public void sort(int[] data); VVO C-:
} 2{Nv&ZX?
%1ZJi}~
public static void swap(int[] data, int i, int j) { yEyx.Mh.Af
int temp = data; 4;'o`K~*
data = data[j]; Aq%TZ_m
data[j] = temp; __M(dN(^
} +<7~yZ[Z8
} u)PB@