[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; %tJ@)
} !O*uQB
int i1=l; xE%sPWbj
int i2=mid+1; )NL_))\
for(int cur=l;cur<=r;cur++){ $WHmG!)*
if(i1==mid+1) B0eKj=y;
data[cur]=temp[i2++]; qB44;!(
else if(i2>r) 8:)itYE
data[cur]=temp[i1++]; eJtfQ@?
else if(temp[i1] data[cur]=temp[i1++]; (b>B6W\&
else x#,nR]C
data[cur]=temp[i2++]; "qvJ-Y
} W<s5rMx
} <c$K3
B_#U|10et
} &WAJ;7f
%P tdFz$
改进后的归并排序: ]9/{
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package org.rut.util.algorithm.support; $g+q;Y~i0
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import org.rut.util.algorithm.SortUtil; 3X A8\Mg
^=V b'g3P~
/** P gK> Z,
* @author treeroot 76rRF
* @since 2006-2-2 mj9r#v3.
* @version 1.0 NoG`J$D
*/ <m!(eLm+B
public class ImprovedMergeSort implements SortUtil.Sort { 47 *,
[Uw/;Kyh
private static final int THRESHOLD = 10; EoD[,:*
Ec;{N
/* ZVX!=3VT
* (non-Javadoc) 5zR9N>!c
* f+iM_MI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^t#W?rxp&
*/ !%s&GD8&l
public void sort(int[] data) { {Wp5Ane
int[] temp=new int[data.length]; VwxLElV
mergeSort(data,temp,0,data.length-1); $wx)/t<
} /WWD;keP5
.|Zt&5osI
private void mergeSort(int[] data, int[] temp, int l, int r) { A,'JmF$d
int i, j, k; B>"O~ gZ{#
int mid = (l + r) / 2; 1hnw+T<<W
if (l == r) xU_Dg56z'&
return; "o.g}Pv
if ((mid - l) >= THRESHOLD) p{BBqKv
mergeSort(data, temp, l, mid); FqT2+VO~
else 2N$yn
insertSort(data, l, mid - l + 1); Zn]njf1x
if ((r - mid) > THRESHOLD) fF*{\
mergeSort(data, temp, mid + 1, r); Rx>>0%e.
else 6 (@U+`
insertSort(data, mid + 1, r - mid); 6~_TXy/
FG[YH5
for (i = l; i <= mid; i++) { bQFMg41*w7
temp = data; mzkv/
} rp^Gk
for (j = 1; j <= r - mid; j++) { <>tQa5;
temp[r - j + 1] = data[j + mid]; \uTy\KA
} 4Cl41a
int a = temp[l]; O)E8'Oe"Q
int b = temp[r]; 7@*l2edXm+
for (i = l, j = r, k = l; k <= r; k++) { E=9xiS
if (a < b) { ,J63?EQ3
data[k] = temp[i++]; vOl<
a = temp; ~p0M|
} else { bm:"&U*tu'
data[k] = temp[j--]; jx7b$x]
b = temp[j]; [^4)3cj7}
} 9X-w5$<
} sWc_,[b
} s v}o%
eAPNF?0yh
/** CCQ38P@rv
* @param data a\BV%'Zqg
* @param l fI([vI
* @param i ~& @UH
*/ 71GyMtX
private void insertSort(int[] data, int start, int len) { Cj6+zJ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +4Uxq{.K
} l9"T"9C{
} 8UahoNrSt
} r%^l~PN
} Gec?
^[]@dk9
堆排序： ~dFdO7
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package org.rut.util.algorithm.support; yK3b^
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import org.rut.util.algorithm.SortUtil; ?mCino
<HC5YA)4
/** w#!^wN
* @author treeroot zcn/LF
* @since 2006-2-2 1"4Pan
* @version 1.0 -J<{NF
*/ ev}ugRxt|k
public class HeapSort implements SortUtil.Sort{ P wY~L3,
E9"P~ nz
/* (non-Javadoc) vTdJe
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hN3*]s;/6z
*/ X' ,0vK
public void sort(int[] data) { e2X\ll
MaxHeap h=new MaxHeap(); c :{#H9
h.init(data); _3'FX#xc
for(int i=0;i h.remove(); LW$(;-rY
System.arraycopy(h.queue,1,data,0,data.length); T|o ]8z
} >-0\wP
`pfZJ+
private static class MaxHeap{ R;]z/|8
mz'r<v2Tc
void init(int[] data){ BM,]Wjfdj
this.queue=new int[data.length+1]; Ac2,A>
for(int i=0;i queue[++size]=data; \pVmSac,
fixUp(size); z{N~AaY
} ]#fmih^
} m/T3Um
P~H?[ ;
private int size=0; lI<Q=gd
oieJ7\h]m
private int[] queue; 3;hztCZj
hN5?u:
public int get() { m 3Y@p$i5
return queue[1]; ~mR@L`"l
} t6+c"=P#
!G8=S'~~
public void remove() { !pqfx93R*
SortUtil.swap(queue,1,size--); XDtMFig
fixDown(1); 1[g -f,
} @ gv^
file://fixdown u3B[1Ae:K
private void fixDown(int k) { YXi'^GU@
int j; UBm L:Qv
while ((j = k << 1) <= size) { o^!_S5zKe.
if (j < size %26amp;%26amp; queue[j] j++; !'jZ !NFO
if (queue[k]>queue[j]) file://不用交换 =sYUzYm
break; j+9;Cp]NV
SortUtil.swap(queue,j,k); Vx<`6uv
k = j; XB.xIApmy
} WEnI[JGe
} {PTB]D'
private void fixUp(int k) { FoNkISzW
while (k > 1) { ~v$1@DQ}
int j = k >> 1; Bo#,)%80
if (queue[j]>queue[k]) zJ=lNb?q
break; NR6wNz&81
SortUtil.swap(queue,j,k); VbG#)>"F
k = j; S <RbC
} 9Ev<t\B
} 5Qh$>R4!"
Z"pCDW)
} [B,w\PLub
l+vD`aJ3
} vh/&KTe?:
^c-8~r|y,
SortUtil： <l.l6okp
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package org.rut.util.algorithm; ms]r1x"
6/5Xy69:h
import org.rut.util.algorithm.support.BubbleSort; =<;C5kSD
import org.rut.util.algorithm.support.HeapSort; cEK<CV
import org.rut.util.algorithm.support.ImprovedMergeSort; AL;z's(F?
import org.rut.util.algorithm.support.ImprovedQuickSort; #B!HPlrv
import org.rut.util.algorithm.support.InsertSort; 'nMj<:0wlD
import org.rut.util.algorithm.support.MergeSort; 6L!/#d0
import org.rut.util.algorithm.support.QuickSort; \2c3Nsra
import org.rut.util.algorithm.support.SelectionSort; a$AR
import org.rut.util.algorithm.support.ShellSort; k',#T932x1
%4QpDt
/** ;}dvc7
* @author treeroot s?5vJ:M Xr
* @since 2006-2-2 [X%Wg:K
* @version 1.0 Z^[ ]s1iP}
*/ Img$D*BM
public class SortUtil { Nt w?~%
public final static int INSERT = 1; z|$M,?r'
public final static int BUBBLE = 2; WR<?_X_
public final static int SELECTION = 3; ?]AF? 0/
public final static int SHELL = 4; gr^TL1(
public final static int QUICK = 5; JE*d-
public final static int IMPROVED_QUICK = 6; bl3?C
public final static int MERGE = 7; f|'0FI
public final static int IMPROVED_MERGE = 8; 1VR|z
public final static int HEAP = 9; DuMzK%
(k^o[HF
public static void sort(int[] data) { KbSE=3
sort(data, IMPROVED_QUICK); +Zg@X.z
} cFZcBiw
private static String[] name={ *8I"7'xh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'nT#c[x[0
}; QG=K^g
YZk.{#^c
private static Sort[] impl=new Sort[]{ XkhGU?={
new InsertSort(), =G9I7Y@
new BubbleSort(), rk-GQ#SKU
new SelectionSort(), a_3w/9L4r
new ShellSort(), (uVL!%61k
new QuickSort(), FTQNS8
new ImprovedQuickSort(), mz|p=[lR|
new MergeSort(), j>`-BN_
new ImprovedMergeSort(), |pG%]?A
new HeapSort() .nzN5FB U
}; G`Df'Yy
srQGqE~
public static String toString(int algorithm){ %xv*#.<Vj
return name[algorithm-1]; eev-";c
} B2,c_[UZ.
q|g>;_
public static void sort(int[] data, int algorithm) { 8CUlE-R5
impl[algorithm-1].sort(data); 3oOr*N3R
} 6E#znRi6IE
dSI<s^n
public static interface Sort { we/sv9v}n
public void sort(int[] data); cSTF$62E
} RG.wu6Av
v{X<6^g
public static void swap(int[] data, int i, int j) { .%EYof
int temp = data; NZ"nG<;5
data = data[j]; r])V6 ^U
data[j] = temp; 82M`sk3.
} U0;pl2
} G1fC'6$3