[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; t=K;/1
} }^}fx [
int i1=l; m$bX;F}T
int i2=mid+1; v}Gpw6
for(int cur=l;cur<=r;cur++){ 1&Fty'p
if(i1==mid+1) {1<XOp#b
data[cur]=temp[i2++]; n0nvp@?7bJ
else if(i2>r) @jKiE%OP
data[cur]=temp[i1++]; J#```cB
else if(temp[i1] data[cur]=temp[i1++]; 5)T=^"IHXi
else |9Gng`)
data[cur]=temp[i2++]; &V$qIvN$
} kvdiDo
} o~_wx
7eM:YqT/#
} sy ]k
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改进后的归并排序: [\Ks+S
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package org.rut.util.algorithm.support; o:p6[SGd
{N \ri{|
import org.rut.util.algorithm.SortUtil; J0 [^hH
`YK2hr
/** j/oM^IY
* @author treeroot =u*\P!$
* @since 2006-2-2 .[@TC@W
* @version 1.0 }k`-n32)|
*/ *tWZ.I<<
public class ImprovedMergeSort implements SortUtil.Sort { ~_!lx
|#&{`3$CG[
private static final int THRESHOLD = 10; d~G, *
D.Q9fa&P
/* !vaS fL*]
* (non-Javadoc) ]YO &_#
* ]ZkR~?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <~%e{F:[#
*/ ,C=Lu9
public void sort(int[] data) { e(5:XHe
int[] temp=new int[data.length]; :jJ;&t^^
mergeSort(data,temp,0,data.length-1); #[Z1W8e
} k2"DFXsv
CJDnHuozc
private void mergeSort(int[] data, int[] temp, int l, int r) { i42M.M6D$
int i, j, k; vxey$Ir
int mid = (l + r) / 2; ^AI5SjOUx
if (l == r) ZQ%4]=w
return; oCCTRLb02
if ((mid - l) >= THRESHOLD) #|ppW fZQ
mergeSort(data, temp, l, mid); 5$<\
else (O&R-5m
insertSort(data, l, mid - l + 1); j,]KidDWm
if ((r - mid) > THRESHOLD) 1\[En/6
mergeSort(data, temp, mid + 1, r); K4r"Q*h
else JGJy_.C
insertSort(data, mid + 1, r - mid); ?4[IIX-
k\ 2.\Lwb
for (i = l; i <= mid; i++) { n^a&@?(+
temp = data; c}QWa"\2n
} lBYc(cr
for (j = 1; j <= r - mid; j++) { feSj3,<!
temp[r - j + 1] = data[j + mid]; \V1geSoE
} 4 8}\
int a = temp[l]; H*gX90{!2
int b = temp[r]; Z4"SKsJT/>
for (i = l, j = r, k = l; k <= r; k++) { 65P*Gu?
if (a < b) { Ib~n}SA
data[k] = temp[i++]; *VbB'u:
a = temp; <hJ%]]
} else { aX)k(*|
data[k] = temp[j--]; aJ4y%Gy?
b = temp[j]; SY[7<BUZ
} ;$VQRXq
} SZ;Is,VgU4
} 0LjF$3GpZ
T3JM8
/** 3eg)O34
* @param data b_'VWd:am
* @param l [110[i^
* @param i /OX;3" +1
*/ G1X${x7
private void insertSort(int[] data, int start, int len) { !"G|y4O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); VbwB<nQl
} &&Uc%vIN
} "f1`6cx6
} [myIcLp^aP
} >" z$p@7
:vsF4
堆排序： "8NhrUX
~"Q24I
package org.rut.util.algorithm.support; zL%ruWNG
MYmH?A
import org.rut.util.algorithm.SortUtil; (59u<F
;b-d2R
/** .8v[ss6:
* @author treeroot iE}Lw&x
* @since 2006-2-2 fH>I/%
* @version 1.0 jNC@b>E?~
*/ ~8j4IO(
public class HeapSort implements SortUtil.Sort{ v J_1VW
=B/Ac0Y
/* (non-Javadoc) )R- e^Cb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ) ]y^RrD
*/ JM&:dzyIP
public void sort(int[] data) { CY4ntd4M
MaxHeap h=new MaxHeap(); $YPU(y
h.init(data); HQ7
for(int i=0;i h.remove(); wH<'*>/
System.arraycopy(h.queue,1,data,0,data.length); 8iIz!l%O
} -(Z%?]+
3jJd)C R
private static class MaxHeap{ ` 465 H
2JMMNpya
void init(int[] data){ /_?y]Ly[r
this.queue=new int[data.length+1]; pSPVY2qKX
for(int i=0;i queue[++size]=data; (H_YYZ3ZX
fixUp(size); B=R9K3f
} 0wA?.~ L
} b.4H4LV
{'^!S"9x
private int size=0; K,$Ro@!
<*vWcCS1
private int[] queue; 3[a&|!Yw
HTa]T'
public int get() { fl4z'8P"(
return queue[1]; ij|+MX
} ; *@lH%u
NCKhrDd&
public void remove() { Vt[Kr
SortUtil.swap(queue,1,size--); $lC*q
fixDown(1); H;=JqD8`
} p_Yx"nO7
file://fixdown `nvm>u~[Hq
private void fixDown(int k) { &y~~Z [.F,
int j; &l<~Xd#
while ((j = k << 1) <= size) { L+]|-L`S
if (j < size %26amp;%26amp; queue[j] j++; 9P)28\4
if (queue[k]>queue[j]) file://不用交换 W,53|9b@
break; Wb;x eG
SortUtil.swap(queue,j,k); < 9 vS
k = j; <jk.9$\$A
} 6%^9`|3
} 50?5xSEM0_
private void fixUp(int k) { Pi!3wy
while (k > 1) { DEFh&n
int j = k >> 1; /+p]VHP\
if (queue[j]>queue[k]) m|%L[h1
break; kvoEnwBe_
SortUtil.swap(queue,j,k); Tl%n|pc
k = j; FZi'#(y
} UEb'b,O_9
} |nu)=Ag
;Q}pmBkqB
} #n5DK{e
-IP3I
} H+O^el
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SortUtil： Wb7z&vj
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package org.rut.util.algorithm; G#f(oGn :
vrr`^UB2
import org.rut.util.algorithm.support.BubbleSort; l(fStpP
import org.rut.util.algorithm.support.HeapSort; ;V:Cf/@@R
import org.rut.util.algorithm.support.ImprovedMergeSort; N =0R6{'
import org.rut.util.algorithm.support.ImprovedQuickSort; q_gsYb
import org.rut.util.algorithm.support.InsertSort; L>PPAI
import org.rut.util.algorithm.support.MergeSort; 1^HUu"Kt
import org.rut.util.algorithm.support.QuickSort; Zi4Ektj2
import org.rut.util.algorithm.support.SelectionSort; wfJ[" q
import org.rut.util.algorithm.support.ShellSort; z"*$ .
WokQ X"
/** QN'v]z
* @author treeroot ZBf9Upg
* @since 2006-2-2 *9?T?S|^$F
* @version 1.0 (F.vVldBy
*/ jaOt"iU.B
public class SortUtil { $(PWN6{\r^
public final static int INSERT = 1; zB@@Gs>
public final static int BUBBLE = 2; OpT0V]k^"9
public final static int SELECTION = 3; j\^u_D
public final static int SHELL = 4; 1(ud(8?|
public final static int QUICK = 5; OBBEsD/bc
public final static int IMPROVED_QUICK = 6; {R{Io|
public final static int MERGE = 7; ^;xO-;q
public final static int IMPROVED_MERGE = 8; (46S^*
public final static int HEAP = 9; |-'.\)7:
h5>38Kd
public static void sort(int[] data) { {zj<nu
sort(data, IMPROVED_QUICK); /EXubU73
} L3 VyW8Y
private static String[] name={ HHMv%H]M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" YYiT,Xp<A
}; P:3%#d~q
`tjH#W`
private static Sort[] impl=new Sort[]{ xSal=a;k
new InsertSort(), :87HXz6]jS
new BubbleSort(), ,2y" \_
new SelectionSort(), UB7H`)C}
new ShellSort(), "v9i;Ba>+
new QuickSort(), YJ[Jo3M@j0
new ImprovedQuickSort(), c~=yD:$
new MergeSort(), 0s%rd>3
new ImprovedMergeSort(), }F;Nh7?
new HeapSort() KDmzKOl
}; K7 N)VG
i)[8dv
public static String toString(int algorithm){ G._E9
return name[algorithm-1]; oP0ZJK&;
} -?K?P=B;X
?{bAyh/
public static void sort(int[] data, int algorithm) { *wY { ~zh
impl[algorithm-1].sort(data); nOE 1bf^l
} kpU-//lk+
:+nECk
public static interface Sort { z/IZ ;K_e
public void sort(int[] data); "VfV;)]|w
} mEM/}]2
V(LE4P1
public static void swap(int[] data, int i, int j) { /cN. -lEo%
int temp = data; k.dQ;v}
data = data[j]; Ue8k9%qV
data[j] = temp; A` iZ"?
} 0k7kmDW
} ~=pAy>oV