[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; Zp__
} D *LZ_
int i1=l; E!Fy2h>[Z
int i2=mid+1; ]&G5/]f
for(int cur=l;cur<=r;cur++){ < m9O0
if(i1==mid+1) swLgdk{8n
data[cur]=temp[i2++]; :&or'Yi}
else if(i2>r) |g'sRTKJ
data[cur]=temp[i1++]; 8v]{ 5
else if(temp[i1] data[cur]=temp[i1++]; TyBNRnkt
else 2Vu|uZd
data[cur]=temp[i2++]; Z(}x7jzW
} )uX:f8
} ap6Vmp
fnmZJJ,Q
} LiB0]+wzj
m1[QD26
改进后的归并排序: *V"cu
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package org.rut.util.algorithm.support; l E&hw
s*8hN*A/,
import org.rut.util.algorithm.SortUtil; nO|S+S_9
zA"D0fr
/** Q^p@ 1I
* @author treeroot +tV(8h4
* @since 2006-2-2 *UyV@
* @version 1.0 TM^1{0;r5
*/ =AKW(v
public class ImprovedMergeSort implements SortUtil.Sort { ^g[])2",
+pcj8K%
private static final int THRESHOLD = 10; HRb_ZJz
Txfb-f!mv\
/* a<Ns C1
* (non-Javadoc) FQ-(#[
* ]nQ$:%HP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rL,)Tc|"
*/ YwF6/JA0^
public void sort(int[] data) { (%P* rl
int[] temp=new int[data.length]; `riv`+J{s
mergeSort(data,temp,0,data.length-1); Fb``&-Qm:
} TAAsV#l
Bs1-UI}+
private void mergeSort(int[] data, int[] temp, int l, int r) { =)zq%d?i;
int i, j, k; n7MS{`
int mid = (l + r) / 2; c'|MC[^A
if (l == r) 0}^-, Q,
return; DS$ _"'g%i
if ((mid - l) >= THRESHOLD) "w'YZO]>
mergeSort(data, temp, l, mid); "yz\p,
else 4KM$QHS5{
insertSort(data, l, mid - l + 1); iP!Y4F
if ((r - mid) > THRESHOLD) G/8xS=
mergeSort(data, temp, mid + 1, r); ?X9 =4Z~w
else asq/_`
insertSort(data, mid + 1, r - mid); Hwc{%.%ae
52["+1g\
for (i = l; i <= mid; i++) { hL3,/^;E,
temp = data; 5{u6qc4FW
} FSQ&J|O
for (j = 1; j <= r - mid; j++) { 2s4=%l
temp[r - j + 1] = data[j + mid]; DdQf%W8u
} u:S@'z>
int a = temp[l]; XOeh![eMX
int b = temp[r]; hv"toszj\
for (i = l, j = r, k = l; k <= r; k++) { 6>L.)V
if (a < b) { __V]HcP;
data[k] = temp[i++]; ^2AF:(E
a = temp; D}061~zb$
} else { _5K_YhT
data[k] = temp[j--]; k,@J&
b = temp[j]; &Bp\kv
} |ber:1
} ZKR z=(
} (k5DbP[
-+9x 0-P
/** wrO>#`Z
* @param data a?Y1G3U'
* @param l i]53A0l
* @param i vl5n%m H>^
*/ O7dFz)$
private void insertSort(int[] data, int start, int len) { OhW=F2OIV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8@fDn(]w
} O9|'8"AF
} hY1|qp
} AslH V@K
} >#:/ GN?
PD}R7[".>
堆排序： _RW[]MN3*
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package org.rut.util.algorithm.support; ).]m@g:ew
Hr+-ndH!Pq
import org.rut.util.algorithm.SortUtil; VBX# !K1Q
`es($7}P_W
/** [[e|GQ
* @author treeroot p-pw*wH0
* @since 2006-2-2 -/-6Td1JY>
* @version 1.0 #8z,'~\
*/ w}Upa(dU
public class HeapSort implements SortUtil.Sort{ 2&Byq
R2$U K
/* (non-Javadoc) ,OKM\N,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yo*iv+l
*/ K7hf m%`N
public void sort(int[] data) { }R1`ThTM
MaxHeap h=new MaxHeap(); gr 5]5u
h.init(data); j>o +}p?3I
for(int i=0;i h.remove(); bJ|?5
System.arraycopy(h.queue,1,data,0,data.length); <]'"e]
} @g75T`N
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private static class MaxHeap{ 0H3T'J%r
Q@2tT&eL
void init(int[] data){ GVEWd/:X(
this.queue=new int[data.length+1]; u!uDu,y
for(int i=0;i queue[++size]=data; Y(y9l{'
fixUp(size); (oXN>^-D
} VWshFI
} DVhTb
+?iM$}8!U
private int size=0; <s-@!8*(
Uxemlp%%*
private int[] queue; 5b#6 Y
*|HZ&}
public int get() { j/9QV
return queue[1]; KupMndK
} p{a]pG+3
Ys$YI{
public void remove() { v1C.\fL
SortUtil.swap(queue,1,size--); Tq84Fn!HJ>
fixDown(1); \5P.C
} <8)s
file://fixdown F36ViN\b
private void fixDown(int k) { c[ony:6
int j; =$8@JF'
while ((j = k << 1) <= size) { [S]!+YBK
if (j < size %26amp;%26amp; queue[j] j++; d=Do@) m|
if (queue[k]>queue[j]) file://不用交换 {TncqA
break; c,q"}nE8w
SortUtil.swap(queue,j,k); 0sd-s~;
k = j; +V9B
} sdf%
} *kQCW#y0
private void fixUp(int k) { ~B!O~nvdQ
while (k > 1) { z9 w&uZzi
int j = k >> 1; ~u0xXfv#
if (queue[j]>queue[k]) naIv=
break; .NkAD-k`
SortUtil.swap(queue,j,k); cH;TnuX
k = j; D4q>R;
} YvruK:I
} `OP>(bU0
d>, V
} 6B''9V:s
PDIclIMS'F
} 5ttMua <G?
KO|pJ3
SortUtil： "W@XP+POAY
C,r`I/;
package org.rut.util.algorithm; h4anr7g{
EF=dXm/\
import org.rut.util.algorithm.support.BubbleSort; 7"q+"0G
import org.rut.util.algorithm.support.HeapSort; ~*!u
import org.rut.util.algorithm.support.ImprovedMergeSort; x48'1&m
import org.rut.util.algorithm.support.ImprovedQuickSort; 7B(bH8
import org.rut.util.algorithm.support.InsertSort; `4%;qLxngP
import org.rut.util.algorithm.support.MergeSort; 5_)@B]~nM
import org.rut.util.algorithm.support.QuickSort; 3eTrtCe$
import org.rut.util.algorithm.support.SelectionSort; YN@6}B#1
import org.rut.util.algorithm.support.ShellSort; NLQE"\#a
'e]HP-Y<
/** @ EmGexLPM
* @author treeroot G*\abL
* @since 2006-2-2 ZCQ<%f
* @version 1.0 90s;/y(
*/ T|@#w%c''
public class SortUtil { Cqgk
public final static int INSERT = 1; %f(S'<DhC
public final static int BUBBLE = 2; JzMZB"Z?
public final static int SELECTION = 3; pDq#8*q+v
public final static int SHELL = 4; #9`rXEz
public final static int QUICK = 5; (`6%og#8
public final static int IMPROVED_QUICK = 6; B:-U`CHHQ
public final static int MERGE = 7; -@2'I++"@
public final static int IMPROVED_MERGE = 8; A)Qh
public final static int HEAP = 9; Kej|1g1f
1TNz&=e
public static void sort(int[] data) { tqf&N0*
sort(data, IMPROVED_QUICK); 0||"r&:X
} 4;C*Fa
private static String[] name={ dC`tN5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _1sMYhI
}; L)F1NuR
'j,oIqx
private static Sort[] impl=new Sort[]{ !:"-:O}>=,
new InsertSort(), SY,I>-%
new BubbleSort(), yI8m%g%
new SelectionSort(), o\ngR\>
new ShellSort(), xQJIM.
new QuickSort(), VLsh=v
new ImprovedQuickSort(), XDk'2ycv
new MergeSort(), H&X:!xa5
new ImprovedMergeSort(), AJyq>0p
new HeapSort() aDL)|>"Q
}; :N@U[Wx0A
%bP~wl~
public static String toString(int algorithm){ `c"4PU^
return name[algorithm-1]; k6Ihc?HL
} gYatsFyL
53 @oP
public static void sort(int[] data, int algorithm) { (*,8KLV_i
impl[algorithm-1].sort(data); 7DtIVMiK
} <%z@
1E8H%2$ V
public static interface Sort { u7;`4P:o@
public void sort(int[] data); 99e*]')A%
} XFW5AP
4'SaEsA~
public static void swap(int[] data, int i, int j) { HG2GZ}~^1
int temp = data; [yw%ih)
data = data[j]; _Vjpw,
data[j] = temp; GQN98Y+h
} lhqQCV
} s^w\zzYb