[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; g p2S
} 2+2Gl7" s
int i1=l; bI_6';hq!
int i2=mid+1; DxFmsjX[L
for(int cur=l;cur<=r;cur++){ S^Lu RF]F
if(i1==mid+1) rW8.bMmM
data[cur]=temp[i2++]; aw\\oN*
else if(i2>r) LR:v$3 G(
data[cur]=temp[i1++]; a+U^mPe
else if(temp[i1] data[cur]=temp[i1++]; *WHQ1geI8
else V+A9.KoI
data[cur]=temp[i2++]; G<2OL#Y-
} S[2uez`
} ?>p(*
9ff6Apill
} e|t@"MxvC
X3bPBv
改进后的归并排序: U/W<Sa\`
Hd/|f;
package org.rut.util.algorithm.support; ;V=Y#|o
bc?\lD$$
import org.rut.util.algorithm.SortUtil; {Tps3{|wt
J|uxn<E<>
/** 5a`f% h%
* @author treeroot hnk,U:7}
* @since 2006-2-2 LXZ0up-B-
* @version 1.0 :"vW;$1 }
*/ Cggu#//Z}Q
public class ImprovedMergeSort implements SortUtil.Sort { Ap:mc:
^n5rUwS>
private static final int THRESHOLD = 10; nE2w?
O;34~k
/* @%oHt*u
* (non-Javadoc) X6hp}
* Skbd'j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ke*tLnO
*/ 6D=9J%;
public void sort(int[] data) { u%o]r9xl'
int[] temp=new int[data.length]; un)YK
mergeSort(data,temp,0,data.length-1); m=qEQy6#2u
} TbUouoc
0Z m^6T
private void mergeSort(int[] data, int[] temp, int l, int r) { yobcAV`
int i, j, k; pM|m*k
int mid = (l + r) / 2; i-<1M|f
if (l == r) dHzQAqb8J
return; Ao0p=@Y
if ((mid - l) >= THRESHOLD) ^n@dC?
mergeSort(data, temp, l, mid); 5~pQ$-
else >8*0"Q
insertSort(data, l, mid - l + 1); 3tt3:`g
if ((r - mid) > THRESHOLD) <T3v|\6~H
mergeSort(data, temp, mid + 1, r); YQH=]5r
else )$> pu{o
insertSort(data, mid + 1, r - mid); b%-S'@ew
y[C++Q
for (i = l; i <= mid; i++) { A"V($:>U
temp = data; sa7F-XM
} 2`[iTBZ=^
for (j = 1; j <= r - mid; j++) { 1iiQW
temp[r - j + 1] = data[j + mid]; \[>Ob
} Un~8N
int a = temp[l]; U5iyvU=UG
int b = temp[r]; j_\?ampF
for (i = l, j = r, k = l; k <= r; k++) { MR?5p8S#g
if (a < b) { 5Al1u|;HB
data[k] = temp[i++]; N4xCZb
a = temp; 1@i|[dq
} else { =hP7Hea(N
data[k] = temp[j--]; {\-9^RL
b = temp[j]; &2P+9j>
} M3 TsalF
} `hVi!Q]*P
} @{X<|,W9w
J[k,S(Y
/** G0izZWc
* @param data ?_@_NV MY
* @param l '&;s32']}
* @param i oy _DYop
*/ <27:O,I
private void insertSort(int[] data, int start, int len) { NKSK+ll2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \U?$r[P
} O7Z?y*
} OxC8xB;`
} <\fB+ AZ
} ,\Q^[e!m~
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堆排序： z{q|HO
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package org.rut.util.algorithm.support; Od,P,t9
*B3 4
import org.rut.util.algorithm.SortUtil; ,u<oAI`
gB)Cmw*
/** FB>^1B]]
* @author treeroot 0DsW1
* @since 2006-2-2 'Zket=Sm;
* @version 1.0 SZ&I4-
*/ 7:S4 Ur
public class HeapSort implements SortUtil.Sort{ hHsN(v
X1C &;5
/* (non-Javadoc) ]_EJ "'x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r-s9]0"7~
*/ [gybdI5wur
public void sort(int[] data) { (Ev=kO
MaxHeap h=new MaxHeap(); J6C/`)+w
h.init(data); LFskNF0X
for(int i=0;i h.remove(); $SbgdbX
System.arraycopy(h.queue,1,data,0,data.length); nkxv,_)ZT
} _-R&A@
y[64O x
private static class MaxHeap{ b;5&V_
h6(\ tRd!\
void init(int[] data){ {@7xOOAw
this.queue=new int[data.length+1]; /)-OK7x
for(int i=0;i queue[++size]=data; y(fJ{k
fixUp(size); G(fS__z
} c]+uj q
} Sp]u5\
E|K|AdL
private int size=0; A0l-H/l7
]F#}8$
private int[] queue; sq45fRAi
!K%8tr4
public int get() { S11ME
return queue[1]; v[+ ]
} {S$61ut
@r*w 84
public void remove() { 8-u #<D.
SortUtil.swap(queue,1,size--); @km@\w
fixDown(1); Klj -dz
} -FGM>~x
file://fixdown /7fD;H^*
private void fixDown(int k) { 4Nl3"@<$
int j; "sUjJ|
while ((j = k << 1) <= size) { *Tum(wWZ
if (j < size %26amp;%26amp; queue[j] j++; c2RQwtN|
if (queue[k]>queue[j]) file://不用交换 xh:A*ZI=7
break; dI?x&#(vw
SortUtil.swap(queue,j,k); =3dR-3
k = j; &~KAZ}xu
} Z4s+8cTHn
} WXs?2S*
private void fixUp(int k) { R^?9V=Y<T
while (k > 1) { )C>8B`^S
int j = k >> 1; #;])/8R%
if (queue[j]>queue[k]) NyR,@n1
break; H{et2J<H
SortUtil.swap(queue,j,k); B(1WI_}~
k = j; BS|$-i5L
} HDYWDp
} $z[@DB[
^5n#hSqZ=M
} PSHzB! H=n
&Sdf0"
} 3]li3B'
7tP qez#
SortUtil： @:Emmzucv|
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package org.rut.util.algorithm; ~$jRn(2
V.-cm51I
import org.rut.util.algorithm.support.BubbleSort; '>k1h.i
import org.rut.util.algorithm.support.HeapSort; yXT.]%)
import org.rut.util.algorithm.support.ImprovedMergeSort; +.-g`Vyz*
import org.rut.util.algorithm.support.ImprovedQuickSort; cb5T-'hY
import org.rut.util.algorithm.support.InsertSort; y!VL`xV
import org.rut.util.algorithm.support.MergeSort; tNG[|Bi#
import org.rut.util.algorithm.support.QuickSort; BIXbdo5F
import org.rut.util.algorithm.support.SelectionSort; O<P(UT"
import org.rut.util.algorithm.support.ShellSort; VVw5)O1'
Y3JIDT^
/** :!/ (N
* @author treeroot p5aqlYb6r
* @since 2006-2-2 $U4[a:
* @version 1.0 ]YrgkC35
*/ 9T_fq56Oh6
public class SortUtil { rtdEIk
public final static int INSERT = 1; Pm"nwm
public final static int BUBBLE = 2; OK(xG3T
public final static int SELECTION = 3; ~X(2F#{<{
public final static int SHELL = 4; L0;XzZS
public final static int QUICK = 5; ~5o2jTNy`p
public final static int IMPROVED_QUICK = 6; F<4>g+Ag
public final static int MERGE = 7; D]twid~OS
public final static int IMPROVED_MERGE = 8; K]&i9`>N
public final static int HEAP = 9; }Ud'j'QMy
Ce/D[%
public static void sort(int[] data) { /V }Z,'+
sort(data, IMPROVED_QUICK); FA{'Ki`
} kjF4c6v
private static String[] name={ }t*:EgfI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +GEdVB
}; X#o<))
? =I']$MH
private static Sort[] impl=new Sort[]{ =9;b|Y"aQ
new InsertSort(), >VppM `
new BubbleSort(), +E']&v$
new SelectionSort(), iXLH[uhO;
new ShellSort(), c-**~tb(
new QuickSort(), >c$3@$
new ImprovedQuickSort(), ~U4Cf >
new MergeSort(), Pa'N)s<
new ImprovedMergeSort(), SmUiH9qNd,
new HeapSort() QYEGiT
}; ?-'GbOr!
<m,bP c :R
public static String toString(int algorithm){ =\M6s
return name[algorithm-1]; {^?:-#~h
} 2^qJ'<2]M
$ I J^
public static void sort(int[] data, int algorithm) { j8+>E?nm
impl[algorithm-1].sort(data); KMx '(
} b!qlucAeE
6OR)97
public static interface Sort { kZ=2#.
public void sort(int[] data); RG9iTA'
} OQVo4yl"
XUA%3Xr
public static void swap(int[] data, int i, int j) { Ya}}a
int temp = data; a@-bw4SD
data = data[j]; T^ - -:1
data[j] = temp; ,<$rSvMfg
} IP^1ca#<
} 5cb8=W-