[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; *#'&a(hB!
} .GW)"`HbU
int i1=l; BkDq9>
int i2=mid+1; =1mIk0H`
for(int cur=l;cur<=r;cur++){ Fk?KR
if(i1==mid+1) Ft>,
data[cur]=temp[i2++]; o7AI
else if(i2>r) WVL\|y728s
data[cur]=temp[i1++]; sWgzHj(c
else if(temp[i1] data[cur]=temp[i1++]; UD5f+,_;
else 6%T_;"hb
data[cur]=temp[i2++]; <Oj'0NK-
} )/{~&LU
} {|Fn<&G
^ =H 10A
} 0fR?zT?
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改进后的归并排序: b28C(
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package org.rut.util.algorithm.support; ~@iYP/=/Q
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import org.rut.util.algorithm.SortUtil; #YLI"/Kn
r / L
/** a+n?y)u
* @author treeroot w)gMJX/0yw
* @since 2006-2-2 g^:7mG6C
* @version 1.0 FsfP^a
*/ !]!9 $6n
public class ImprovedMergeSort implements SortUtil.Sort { 'ExQG$t
bj 0-72V
private static final int THRESHOLD = 10; p2m`pT
0U:9&jP,
/* bw[K^/
* (non-Javadoc) "=9)|{=m
* 5VlF\-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jiLt *>I
*/ p,#**g:
public void sort(int[] data) { U6_GEBz~y
int[] temp=new int[data.length]; ,j\UZ
mergeSort(data,temp,0,data.length-1); Bj\oo+L/
} h/#s\>)T
b#_u.vP
private void mergeSort(int[] data, int[] temp, int l, int r) { b_oUG_B3]
int i, j, k; 9 N@N U:M+
int mid = (l + r) / 2; 6XGqZ!2
if (l == r) {hKf 'd9E
return; :FI4GR*?
if ((mid - l) >= THRESHOLD) 4m/L5W:K
mergeSort(data, temp, l, mid); ro@`S:
else I~7eu&QZ
insertSort(data, l, mid - l + 1); ZDl(q~4?z
if ((r - mid) > THRESHOLD) JA^Y:@<{/
mergeSort(data, temp, mid + 1, r); [moz{Y
else BO-=X 78f@
insertSort(data, mid + 1, r - mid); hjY)W;
:8Jn?E (36
for (i = l; i <= mid; i++) { jX{t/8v/s4
temp = data; J"]P"`/
} HVcd< :g0
for (j = 1; j <= r - mid; j++) { MIWI0bnf
temp[r - j + 1] = data[j + mid]; Klk[h
} \Y}nehxG@
int a = temp[l]; \BxE0GGky
int b = temp[r]; Ptv=Bwg
for (i = l, j = r, k = l; k <= r; k++) { 1$~W~O
if (a < b) { 9\W }p\c
data[k] = temp[i++]; twJ)h :!_y
a = temp; \^rAH@
} else { iMr/i?`i
data[k] = temp[j--]; >2?O-WXe
b = temp[j]; BF>3CW7
} `SO"F,
} M `bEnu
} xQ7-4N,
kkE1CHY
/** dzPwlCC%-
* @param data ~T<o?98
* @param l `l8^n0-
* @param i y9L:2f\
*/ t9B]V
private void insertSort(int[] data, int start, int len) { 1]vrpJw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); geRD2`3;
} K\]ey;Bd
} <UcbBcW,
} #x;i R8^
} W{2(fb
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堆排序： hE"a(i
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package org.rut.util.algorithm.support; b:uMON,H
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import org.rut.util.algorithm.SortUtil; 71ctjU`U2
~L.)<{?
/** U^$o<2
* @author treeroot %2)'dtPD~
* @since 2006-2-2 T};fy+iq
* @version 1.0 =c,m)\u/8
*/ Z ^tF
public class HeapSort implements SortUtil.Sort{ `_{^&W WS
b{o%`B*
/* (non-Javadoc) K2glkGK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^Pk-<b4}
*/ 71?>~PnbH}
public void sort(int[] data) { ;nbUbRb
MaxHeap h=new MaxHeap(); \)pT+QxZ
h.init(data); /M;A)z
for(int i=0;i h.remove(); Q!<b"8V]
System.arraycopy(h.queue,1,data,0,data.length); tNI~<#+lg
} U`es n?m!
gL+8fX2G6
private static class MaxHeap{ N| dwuBW
vq~btc.p{&
void init(int[] data){ p9[J9D3~
this.queue=new int[data.length+1]; hi I`ot
for(int i=0;i queue[++size]=data; =*aun&
fixUp(size); 7Xu.z9y
} pbe" w=<
} bF'^eR
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private int size=0; DV(^h$1_
A3C#wJ
private int[] queue; 2V0gj /&
4A_}:nU
public int get() { 3sf+uoV
return queue[1]; c:Tw.WA
} ]C =+
0?]*-wvp
public void remove() { =8?gx$r2
SortUtil.swap(queue,1,size--); 9WaKsdf
fixDown(1); Azun"F_f
} e5_:15%R\
file://fixdown Htseu`>_$
private void fixDown(int k) { &>I4-D[
int j; $:R"IqDG
while ((j = k << 1) <= size) { dHnR)[?e
if (j < size %26amp;%26amp; queue[j] j++; \7QAk4I~
if (queue[k]>queue[j]) file://不用交换 mJaWzR
break; >W= 0N(
SortUtil.swap(queue,j,k); x;,H>!r"i
k = j; URq{#,~CT
} 6@TGa%:G
} *_puW x
private void fixUp(int k) { _ 13M
while (k > 1) { E4^zW_|xE
int j = k >> 1; $=/.oh
if (queue[j]>queue[k]) ^Tbw#x]2
break; }| BnG"8
SortUtil.swap(queue,j,k); |0vV?f$
k = j; rAK}rNxI
} n%lY7.z8d
} V&x6ru#
ULq#2l
} N'nI ^=
/F;b<kIy8
} vDgf}
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SortUtil： N-fGc?E
k\UDZ)TQV
package org.rut.util.algorithm; U$j*{`$4
Hn%n>Bnl
import org.rut.util.algorithm.support.BubbleSort; DGMvYNKTj
import org.rut.util.algorithm.support.HeapSort; Omkl|l9
import org.rut.util.algorithm.support.ImprovedMergeSort; (^-i[aJY
import org.rut.util.algorithm.support.ImprovedQuickSort; X8uVet]D~
import org.rut.util.algorithm.support.InsertSort; P8jXruZr
import org.rut.util.algorithm.support.MergeSort; &u-H/CU%
import org.rut.util.algorithm.support.QuickSort; FI1R7A
import org.rut.util.algorithm.support.SelectionSort; Qo>VN`v
import org.rut.util.algorithm.support.ShellSort; |cwGc\ES
6$TE-l
/** yk1syN_
* @author treeroot u|l]8T9L
* @since 2006-2-2 [,s{/OM
* @version 1.0 lg_X|yhL
*/ mAkR<\?iTF
public class SortUtil { f!;4-.p`
public final static int INSERT = 1; e;:~@cB,c
public final static int BUBBLE = 2; 1{B^RR.
public final static int SELECTION = 3; <^?64
public final static int SHELL = 4; ek~bXy{O`
public final static int QUICK = 5; T&6W>VQ|[>
public final static int IMPROVED_QUICK = 6; \; Io
public final static int MERGE = 7; Ay'2!K,I
public final static int IMPROVED_MERGE = 8; nlaJ
public final static int HEAP = 9; ^;0.P)yGA
~GJJ{Bm_
public static void sort(int[] data) { n5i#GvO^
sort(data, IMPROVED_QUICK); Mq!03q6
} PDaD:}9
private static String[] name={ `z<k7ig
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" o*7`r~
}; kIS_6!
,"!t[4p=f
private static Sort[] impl=new Sort[]{ 5tMp@$F\{[
new InsertSort(), y=)Cid
new BubbleSort(), ^<fN
new SelectionSort(), 2 F3U,}
new ShellSort(), xh[De}@
new QuickSort(), ml$"C
new ImprovedQuickSort(), cx?t C#t
new MergeSort(), HMT^gmF)
new ImprovedMergeSort(), ?5d7J,"<h
new HeapSort() .du FMJl
}; tPh``o
Op^r}7
public static String toString(int algorithm){ XPnN"Y"y
return name[algorithm-1]; EAYx+zI
} #w3cImgp2
.c~`{j}
public static void sort(int[] data, int algorithm) { Jsf-t
impl[algorithm-1].sort(data); yD6lzuk{X
} 1DPgiIG~
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public static interface Sort { bd],fNgJ
public void sort(int[] data); T\\Q!pY
} hawE2k0p(
<t[WHDO`
public static void swap(int[] data, int i, int j) { ~D1.opj3
int temp = data; L7i^?40
data = data[j]; g:bw;6^u
data[j] = temp; H6Q1r[(B
} 0^htwec!
} "NqB_?DT