[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; P'6eK?
} i`R}IP?71
int i1=l; 257pO9]
int i2=mid+1; 4~3 N;]X
for(int cur=l;cur<=r;cur++){ Kuz /
if(i1==mid+1) I|*w?i*
data[cur]=temp[i2++]; [Az<E3H"
else if(i2>r) 7Rf${Wv0
data[cur]=temp[i1++]; P"LbWZ6Nj
else if(temp[i1] data[cur]=temp[i1++]; qJb9JL$s
else OsMU>v }m
data[cur]=temp[i2++]; T\VKNEBo
} ^#T@NN0T
} zU;%s<(p
eot]VO:
} dC$z q~q
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改进后的归并排序: A~_*vcz
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package org.rut.util.algorithm.support; 7cTDbc!E-
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import org.rut.util.algorithm.SortUtil; ,iKL 68
!e5!8z
/** hSQuML
* @author treeroot 9?5'>WO
* @since 2006-2-2 &DQyJJ`k
* @version 1.0 )YE3n-~7{
*/ R_IUuz$e
public class ImprovedMergeSort implements SortUtil.Sort { zq1je2DB
I8R#EM%C#
private static final int THRESHOLD = 10; TYv'#{
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/* EDQKbTaPt
* (non-Javadoc) #aX+?z\4
* r%`g` It
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (_h=|VjK(I
*/ 77KB-l2
public void sort(int[] data) { ]S@zhQ
int[] temp=new int[data.length]; ?VUU[h8"v5
mergeSort(data,temp,0,data.length-1); T_\Nvzb}
} N|JML
dY=]ES}`
private void mergeSort(int[] data, int[] temp, int l, int r) { _C`&(?}
int i, j, k; O52B
int mid = (l + r) / 2; Y-yozt
if (l == r) >:o$h2
return; voX4A pl
if ((mid - l) >= THRESHOLD) tQR qQ
mergeSort(data, temp, l, mid); Qy4eDv5
else azhilUD8
insertSort(data, l, mid - l + 1); ]|m?pt
if ((r - mid) > THRESHOLD) GZefeBi
mergeSort(data, temp, mid + 1, r); a/wg%cWG_
else "A(D}~i
insertSort(data, mid + 1, r - mid); \wjT|z1+Y
WswM5RN
for (i = l; i <= mid; i++) { v(0IQ
temp = data; Ez1-Nx
} 14~#k%zO(
for (j = 1; j <= r - mid; j++) { G;ihm$Cad
temp[r - j + 1] = data[j + mid]; m|uVmg!*
} wiFA3_\G
int a = temp[l]; /wi*OZ7R
int b = temp[r]; QBYY1)6S,
for (i = l, j = r, k = l; k <= r; k++) { ?]%ZJd
if (a < b) { PIHix{YR
data[k] = temp[i++]; >rhqhmh;W"
a = temp; $x/VO\Z{-
} else { N,bH@Q.Ci
data[k] = temp[j--]; u<U8LR=)V5
b = temp[j]; YB+My~fw{l
} []-<-TqJ
} 6fm oIK{
} V8O-|7H$v
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/** r0Zj'F_e
* @param data /g>]J70
* @param l r,<p#4(>_
* @param i *qA:%m3
*/ /pC60y}O0
private void insertSort(int[] data, int start, int len) { yRivf.wH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Sa-" G`
} |fB/hs \
} 3V]08
} cte Wl/v
} 7*kTu0m
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堆排序： ?L|Ai\|
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package org.rut.util.algorithm.support; n0FzDQt26
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import org.rut.util.algorithm.SortUtil; 6st^-L
q26qY5D
/** *Oq&g\K)
* @author treeroot R"{P#U,HNO
* @since 2006-2-2 sD9OV6^{?K
* @version 1.0 dtBr#Te
*/ zCS&w ~
public class HeapSort implements SortUtil.Sort{ ~ %Ij5PD
O[$XgPM
/* (non-Javadoc) E_0i9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }((P)\s
*/ \'&,9lP
public void sort(int[] data) { z%nplG'~|
MaxHeap h=new MaxHeap(); )K]<\Q[
h.init(data); !/]z-z2>
for(int i=0;i h.remove(); EgRuB@lw76
System.arraycopy(h.queue,1,data,0,data.length); i&-g
} sRQ4pnnrn
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private static class MaxHeap{ O4!!*0(+91
_`Dz%(c
void init(int[] data){ (rQ)0g@
this.queue=new int[data.length+1]; Bw.?Me)mf|
for(int i=0;i queue[++size]=data; P)[QC
fixUp(size); N_p^DP
} /px`FuJI(
} Yez
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private int size=0; Q) iN_|
-AXMT3p=1
private int[] queue; @9g!5dcT
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public int get() { ze`qf%
return queue[1]; qX]ej2
} KA."[dVa
R/&C}6Gn
public void remove() { % %QAC4
SortUtil.swap(queue,1,size--); )J&!>GP
fixDown(1); eD N%p
} y9Q"3LLic`
file://fixdown 9z(h8H
private void fixDown(int k) { a;0$fRy
int j; [~ |e:
while ((j = k << 1) <= size) { _1?Fyu&<5
if (j < size %26amp;%26amp; queue[j] j++; yXA]E.K!
if (queue[k]>queue[j]) file://不用交换 MP`WU}2
break; .w)T2(
SortUtil.swap(queue,j,k); 0'Qo eFKG
k = j; \4&FW|mx
} Vt U
} b"z9Dpv
private void fixUp(int k) { <*&2b
while (k > 1) { [u`9R<>c"U
int j = k >> 1; w5}2$r
if (queue[j]>queue[k]) (?zZvW8
break; \6v*c;ZF
SortUtil.swap(queue,j,k); ]ipltR7k
k = j; #FV`*G
} VUGVIy.
} 7ip(-0
W= \gPCo
} lr@H4EJ{
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} =9vmRh?8
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SortUtil： o*WI*Fb'
})}-K7v1+
package org.rut.util.algorithm; &tE#1<k
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import org.rut.util.algorithm.support.BubbleSort; h|Uy!?l
import org.rut.util.algorithm.support.HeapSort; .%EEly
import org.rut.util.algorithm.support.ImprovedMergeSort; L1E\^)
import org.rut.util.algorithm.support.ImprovedQuickSort; l~Sn`%PgA
import org.rut.util.algorithm.support.InsertSort; &4O0}ax*Zm
import org.rut.util.algorithm.support.MergeSort; 675x/0}GO
import org.rut.util.algorithm.support.QuickSort; xN#. Pm~
import org.rut.util.algorithm.support.SelectionSort; nY<hfqof
import org.rut.util.algorithm.support.ShellSort; _*Z2</5
f i3<
/** -3T6ck
* @author treeroot \WVrn>%xu
* @since 2006-2-2 xdH*[
* @version 1.0 glppb$oB\
*/ (9J,Qs[;
public class SortUtil { Mb(aI!;A
public final static int INSERT = 1; Gm.n@U p
public final static int BUBBLE = 2; }9xEA[@;
public final static int SELECTION = 3; X|7Y|0o
public final static int SHELL = 4; Dyj5a($9"{
public final static int QUICK = 5; &@xixbg
public final static int IMPROVED_QUICK = 6; pcw^W
public final static int MERGE = 7; ArUGa(;f
public final static int IMPROVED_MERGE = 8; ;?i(WV}ee
public final static int HEAP = 9; XY8s\DK
5"5D(
public static void sort(int[] data) { Rt<8&.m4
sort(data, IMPROVED_QUICK); iG*/m><-
} wNW9xmS
private static String[] name={ 8_K22]c5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" RTNUHz;{L
}; MX?K3=j @>
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private static Sort[] impl=new Sort[]{ ":*PC[)W
new InsertSort(), ++:vO
new BubbleSort(), ubIGs|p2c
new SelectionSort(), 92GO.xAD?
new ShellSort(), 6v0^'}
new QuickSort(), 2@o_7w98
new ImprovedQuickSort(), !p1OBS|
new MergeSort(), SQ)$>3>C
new ImprovedMergeSort(), #{GUu',?&
new HeapSort() m u(HNj
}; W 0Q-&4
<w}k9(Ds
public static String toString(int algorithm){ UcDJ%vI
return name[algorithm-1]; 50(/LV1
} {>G\3|^D
l0g#&V--
public static void sort(int[] data, int algorithm) { -Xkdu?6Eh
impl[algorithm-1].sort(data); @<\f[Znto
} ~ @Ib:M
jcN84AaRFI
public static interface Sort { Pv`yOx&nE
public void sort(int[] data); Nm#VA.~
} AL}c-#GG
i)\`"&.j>N
public static void swap(int[] data, int i, int j) { -c%GlpZw
int temp = data; R3Eh47
data = data[j]; ?};}#%971
data[j] = temp; (80]xLEBL
} JTpKF_Za<
} TvAA