[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; YO.+06X
} *APTgXYR
int i1=l; r;zG
int i2=mid+1; ~#rmw6y
for(int cur=l;cur<=r;cur++){ ?j8_j
if(i1==mid+1) lxLEYDGFS
data[cur]=temp[i2++]; 40;4=
else if(i2>r) w[;5]z
data[cur]=temp[i1++]; AHP;N6Y6
else if(temp[i1] data[cur]=temp[i1++]; 5q}7#{A
else `jGG^w3
data[cur]=temp[i2++]; A9y3B^\*
} (;nh?"5
} 0{47TX*YX
g % 8@pjk
} f5t/=/6>F
to] ~$~Q|>
改进后的归并排序: @aWd0e]
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package org.rut.util.algorithm.support; t\,XG
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import org.rut.util.algorithm.SortUtil; wvEdZGO8!
oMb@)7
/** 6L&_(/{Uw
* @author treeroot r)f+j@KF
* @since 2006-2-2 yRldPk_
* @version 1.0 bR83N
*/ Ob h@d|
public class ImprovedMergeSort implements SortUtil.Sort { 2?(dS
/,^AG2]( f
private static final int THRESHOLD = 10; zCFXQi
2fMKS
/* >B+!fi'SS>
* (non-Javadoc) lemUUl(^
* %2`.*]L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P^m&oH5]EG
*/ K\^S>dV
public void sort(int[] data) { M_f.e!?
int[] temp=new int[data.length]; "|d# +C
mergeSort(data,temp,0,data.length-1); N|
} 9<1dps=c
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private void mergeSort(int[] data, int[] temp, int l, int r) { g3vR\?c`
int i, j, k; t,308Z
int mid = (l + r) / 2; 9wP,Z"
if (l == r) %"BJW
return; 9%^O-8!
if ((mid - l) >= THRESHOLD) zEs:OOM
mergeSort(data, temp, l, mid); Q?{^8?7
else em?Q4t
insertSort(data, l, mid - l + 1); `z<I<
if ((r - mid) > THRESHOLD) D`2w>{Y
mergeSort(data, temp, mid + 1, r); `]wk)50BVp
else t`E e/L%
insertSort(data, mid + 1, r - mid); z--Y
0K^?QM|S
for (i = l; i <= mid; i++) { v]hu5t
temp = data; ~Nn}FNe
} I)q"M]~
for (j = 1; j <= r - mid; j++) { i@#=Rxp
temp[r - j + 1] = data[j + mid]; P$*9Z@
} &r1]A&
int a = temp[l]; QeG3X+
int b = temp[r]; 2[g kDZ
for (i = l, j = r, k = l; k <= r; k++) { ecyN};V>
if (a < b) { aBWA hn
data[k] = temp[i++]; 7,5Bur
a = temp; |Jny0a/0
} else { >IJX=24Rc
data[k] = temp[j--]; sI6coe5n
b = temp[j]; l9f%?<2D
} ##a.=gl
} {_~vf
} 2$FH+wuW
%'.3t|zH
/** &6nLnMF8x
* @param data O9_SVXWVw
* @param l 2&XNT-Qm
* @param i Y]bS=*q
*/ w/csLi.O
private void insertSort(int[] data, int start, int len) { |G/WS0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jGe%'AN\
} /cZTj!M
} rG3?Z^&R+
} 61](a;Di
} 'PWA
2=uwGIF
堆排序： P=R-1V
{%c&T S@s
package org.rut.util.algorithm.support; Sm;@MI<@/
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import org.rut.util.algorithm.SortUtil; o+Fm+5t;
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/** L}rYh`bUP[
* @author treeroot z `jLKPP!=
* @since 2006-2-2 /[E2+g
* @version 1.0 h.q9p!
*/ aNP\Q23D
public class HeapSort implements SortUtil.Sort{ q7<=1r+
zwk&3
/* (non-Javadoc) wV-9T*QrM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9 !$&1|,*
*/ AkCy C1
public void sort(int[] data) { 3!{Tw6A8(
MaxHeap h=new MaxHeap(); U9jdb9 |
h.init(data); w)&?9?~
for(int i=0;i h.remove(); {vdY(
System.arraycopy(h.queue,1,data,0,data.length); aW9\h_$
} i|m8#*Hd
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private static class MaxHeap{ 3)I]bui
/B)2L]6p
void init(int[] data){ L7R!,
this.queue=new int[data.length+1]; H4W!Md
for(int i=0;i queue[++size]=data; bo1J'pU
fixUp(size); -[}Aka,f!
} `@ny!S|1/
} e=3C*+lq\
;hF}"shJN
private int size=0; g#`}HuPoE
p=3t!3
private int[] queue; X}Om)WCr
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public int get() { Z_fwvcZ?05
return queue[1]; #%w+PL:*O
} -xbs'[
\;KSx3o
public void remove() { %|D)U>o{
SortUtil.swap(queue,1,size--); v|KIVBkbT
fixDown(1); ^4NRmlb
} :!hO9ho
file://fixdown WP?]"H
private void fixDown(int k) { y4l-o
int j; h(R7y@mp\0
while ((j = k << 1) <= size) { ![$`Ivro`
if (j < size %26amp;%26amp; queue[j] j++; q%QvBN
if (queue[k]>queue[j]) file://不用交换 JdLPIfI^
break; `e fiX^
SortUtil.swap(queue,j,k); WrcmC$ff
k = j; `JY+3d,Ui
} %@)R
} J9OL>!J
private void fixUp(int k) { _iCrQJ0"T
while (k > 1) { ."gq[0_YS
int j = k >> 1; W -HOl!)
if (queue[j]>queue[k]) 63J3NwFt
break; m mZP;
SortUtil.swap(queue,j,k); (F 9P1Iq
k = j; {to(?`Y
} ~cyKPg6
} CM$&XJzva
1L+hI=\O
} Ph%ylS/T{
Z,SV9 ~M
} ]n>9(Mp!M
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SortUtil： r]&sXKDc
G6qZ>-GiL
package org.rut.util.algorithm; 5z9hcQAS
GD)paTwO<
import org.rut.util.algorithm.support.BubbleSort; /4OQx0Xmm
import org.rut.util.algorithm.support.HeapSort; ;?@Rq"*
import org.rut.util.algorithm.support.ImprovedMergeSort; _ Pzgn@D
import org.rut.util.algorithm.support.ImprovedQuickSort; qoH:_o8ClO
import org.rut.util.algorithm.support.InsertSort; |bSAn*6b
import org.rut.util.algorithm.support.MergeSort; G7|d$!%
import org.rut.util.algorithm.support.QuickSort; SP<Sv8Okj
import org.rut.util.algorithm.support.SelectionSort; >yLDU_P)
import org.rut.util.algorithm.support.ShellSort; =,q/FY:
Q]GS#n
/** EtPB_! +
* @author treeroot Q:7P /
* @since 2006-2-2 A^+kA)8
* @version 1.0 -zMvpe-am&
*/ 88X]Uw(+
public class SortUtil { 1 oKY7i$
public final static int INSERT = 1; Oi& 9FS
public final static int BUBBLE = 2; ,1B4FAR&
public final static int SELECTION = 3; xi.?@Lff
public final static int SHELL = 4; 9<y{:{i
public final static int QUICK = 5; Qj1%'wWG
public final static int IMPROVED_QUICK = 6; ~,};FI
public final static int MERGE = 7; rA8NE>
public final static int IMPROVED_MERGE = 8; 3I)oqS@q'
public final static int HEAP = 9; 0YL*)=pD,
FZ<6kk4
public static void sort(int[] data) { A{B$$7%
sort(data, IMPROVED_QUICK); mZ? jpnd
} 9[*P`*&
private static String[] name={ i( +Uvtgs
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +}(]7du
}; |}e"6e%
YqXN|&
private static Sort[] impl=new Sort[]{ <_pLmYI
new InsertSort(), `|"o\Bg<
new BubbleSort(), jqj}j2 9
new SelectionSort(), K%BFR,)g
new ShellSort(), 7^Us
new QuickSort(), )>b1%x} =
new ImprovedQuickSort(), Zn.S65J*u
new MergeSort(), {Fyw<0 [@
new ImprovedMergeSort(), ~Ni-}p
new HeapSort() ASMItT
}; ZJGIib
H&F2[j$T
public static String toString(int algorithm){ v6aMYmenBH
return name[algorithm-1]; uQW[2f
} d3?gh[$
>b3IZ^SB#$
public static void sort(int[] data, int algorithm) { 0L"uU3
impl[algorithm-1].sort(data); OEbZs-:
} h<?I?ZR0$
X%iqve"{nB
public static interface Sort { hhylsm
public void sort(int[] data); _3f/lG?&-
} AlrUfSBB
4U)%JK.ta
public static void swap(int[] data, int i, int j) { Kb5}M/8
int temp = data; +U<Ae^V
data = data[j]; e*Nm[*@UW
data[j] = temp; \B/( H)Cd*
} b^8"EBo
} @.`HvS