[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; w1Bkz\95
} rCJ$Pl9R
int i1=l; *`a$6F7m4
int i2=mid+1; tP_.-//
for(int cur=l;cur<=r;cur++){ [8u9q.IZ
if(i1==mid+1) y&\4Wr9m
data[cur]=temp[i2++]; 0f4 y"9m
else if(i2>r) oc?|"
data[cur]=temp[i1++]; %_ew{ff|
else if(temp[i1] data[cur]=temp[i1++]; W@"Rdc-
else Y[*.^l._
data[cur]=temp[i2++]; |s/)lA:9
} 0>[]Da}
} T m"B
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} .7.G}z1
k$=L&id
改进后的归并排序: le:}MM
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package org.rut.util.algorithm.support; >VhZv75
rBJ`=oz
import org.rut.util.algorithm.SortUtil; Xl=RaV^X"
Q8m~L1//S
/** % jDH{xSMb
* @author treeroot >{AE@@PB^
* @since 2006-2-2 >p&"X 2 @
* @version 1.0 &5}YTKe}|
*/ k7uX!}
public class ImprovedMergeSort implements SortUtil.Sort { ~,,r\Y+
rDl/R^w"
private static final int THRESHOLD = 10; ll__A|JQ
B9l~Y/3|
/* -axKnfj
* (non-Javadoc) CUDA<Fm
* q:_:E*o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Aa-5k3:x]=
*/ jd]L}%ax
public void sort(int[] data) { }a OBQsnO
int[] temp=new int[data.length]; (o{Y;E@/y
mergeSort(data,temp,0,data.length-1); V;^-EWNj
} +<$(ez
}:?*n:g5
private void mergeSort(int[] data, int[] temp, int l, int r) { H2iIBGu|L
int i, j, k; `*[Kmb\
int mid = (l + r) / 2; oW OR7)?r
if (l == r) !I|_vJ@<
return; ;FI'nL
if ((mid - l) >= THRESHOLD) e@c8Ce|0
mergeSort(data, temp, l, mid); $c*fbBM(&n
else 'oz$uvX
insertSort(data, l, mid - l + 1); !bzWgD7j
if ((r - mid) > THRESHOLD) uj;iE 9
mergeSort(data, temp, mid + 1, r); rHk(@T.]
else e'~Qe_
insertSort(data, mid + 1, r - mid); q AVypP?J
#0)TS
for (i = l; i <= mid; i++) { 6l,6k~Z9
temp = data; O0y0'P-rJq
} 2V8"jc
for (j = 1; j <= r - mid; j++) { e O~p"d-|
temp[r - j + 1] = data[j + mid]; ~M7X]
} iwIn3R,
int a = temp[l]; 3 85qQppz
int b = temp[r]; J+CGhk
for (i = l, j = r, k = l; k <= r; k++) { N9ipwr'P
if (a < b) { u/k' ry=
data[k] = temp[i++]; !pfpT\i]N:
a = temp; C!_=L?QT^
} else { eG+$~\%Fub
data[k] = temp[j--]; `?T::&`
b = temp[j]; YS4"TOFw
} =Crl{Ax
} *56j'FX
} J_a2DM6d
51%Rk,/o
/** 0rX%z$D+@
* @param data ;7[DFlS\P
* @param l .`*;AT
* @param i }2Ge??!
*/ DI/d(oFv`
private void insertSort(int[] data, int start, int len) { J<NpA(@^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f7zB_hVDmE
} DmWa!5
} S^q^=q0F
} m Urb
} n=f?Q=h\3
"4KyJ;RA*
堆排序： Na]ITCVR
Tb^1#O
package org.rut.util.algorithm.support; Yq/vym-O5
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import org.rut.util.algorithm.SortUtil; RK*tZ
1z; !)pG.
/** ">B&dNrt
* @author treeroot s o: o b}
* @since 2006-2-2 H [M:iV
* @version 1.0 E690'\)31
*/ UQI!/6F
public class HeapSort implements SortUtil.Sort{ d:Z|It
; p+C0!B2
/* (non-Javadoc) \k$cg~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eVj 8u
*/ f% 8n?f3;u
public void sort(int[] data) { Dd OK&
MaxHeap h=new MaxHeap(); J;V#a=I
h.init(data); \{(cz/]G/
for(int i=0;i h.remove(); lib^JJF
System.arraycopy(h.queue,1,data,0,data.length); (w_b
} *?Oh%.HgF
Mu.tq~b >
private static class MaxHeap{ XYV`[,^h&
$v8T%'p+
void init(int[] data){ 7lOAu]Zx
this.queue=new int[data.length+1]; }WR@%)7ay
for(int i=0;i queue[++size]=data; NUBzc'qb
fixUp(size); t&yuo E
} 5s0`T]X-
} +pv..\
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private int size=0; 1JS5 LS
6DEH|2
private int[] queue; ](+u'8
@Rd`/S@
public int get() { E)'T;%
return queue[1]; Sw{rNzh%$
} C:!&g~{cKi
fX LsLh+~D
public void remove() { aTaL|&(
SortUtil.swap(queue,1,size--); ) [)1
fixDown(1); SQ/}K8uZ
} G{+zKs}~
file://fixdown gYpFF=7j<@
private void fixDown(int k) { n>o=RQ2
int j; _Fkb$NJ"]Q
while ((j = k << 1) <= size) { UOe@R|79q
if (j < size %26amp;%26amp; queue[j] j++; M(} T\R
if (queue[k]>queue[j]) file://不用交换 +>tSO!}[
break; $?&distJ
SortUtil.swap(queue,j,k); !(_qM
k = j; r-hb]!t
} UHI<8o9
} /Zz[vf
private void fixUp(int k) { 6m9\0)R
while (k > 1) { DI :
int j = k >> 1; M VE:JNm
if (queue[j]>queue[k]) #E/|WT
break; +D h?MQt?
SortUtil.swap(queue,j,k); "NV~lJS%
k = j; f1\mE~#}
} Mf9x=K9
} w!UIz[ajI
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} ypvz&SzIh
/p|L.&`U
} pW<l9W
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SortUtil： AB.ZmR9|
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package org.rut.util.algorithm; C7l4X8\w
}F_=.w0
import org.rut.util.algorithm.support.BubbleSort; q' t"
import org.rut.util.algorithm.support.HeapSort; @Bsvk9}
import org.rut.util.algorithm.support.ImprovedMergeSort; J32"Ytdo<
import org.rut.util.algorithm.support.ImprovedQuickSort; ~. 5[
import org.rut.util.algorithm.support.InsertSort; 5n=~l[O
import org.rut.util.algorithm.support.MergeSort; vf!lhV-UG+
import org.rut.util.algorithm.support.QuickSort; YQ-V^e6
import org.rut.util.algorithm.support.SelectionSort; V4<f4|IL
import org.rut.util.algorithm.support.ShellSort; "6WE6zq
&7w*=f8I
/** }vX1@n7T6
* @author treeroot <a(739IF
* @since 2006-2-2 [TmZ\t!5$
* @version 1.0 z7JhS|
*/ xc?=fv
public class SortUtil { .V{y9e+
public final static int INSERT = 1; 1VPxCB\
public final static int BUBBLE = 2; *)T7DN8
public final static int SELECTION = 3; cw;TIx_q
public final static int SHELL = 4; \`?4PQ
public final static int QUICK = 5; |zp}u(N
public final static int IMPROVED_QUICK = 6; 239gpf]}
public final static int MERGE = 7; d?[8VfAnh
public final static int IMPROVED_MERGE = 8; GS,}]c=
public final static int HEAP = 9; Ye\&_w"
X<:Zx#J?i
public static void sort(int[] data) { 7!g4`@!5M
sort(data, IMPROVED_QUICK); k|rbh.Q
} )tx!BJiZ[
private static String[] name={ J'yiVneMw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4='/]z
}; E>1%7" i<
hhJ>>G4R2
private static Sort[] impl=new Sort[]{ ^Zq3K
new InsertSort(), LHusy;<E[
new BubbleSort(), !h+VbZ
new SelectionSort(), AgJPtzs
new ShellSort(), DLEHsbP{$
new QuickSort(), 5"7lWX
new ImprovedQuickSort(), ?,UO$#Xm
new MergeSort(), NvJ}|w,Z
new ImprovedMergeSort(), `6Yk-5
new HeapSort() 6$5SS#
}; 03I*@jj
Y-P?t+l
public static String toString(int algorithm){ xU;Q~(
return name[algorithm-1]; 5J*h7
} jY$3
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public static void sort(int[] data, int algorithm) { ~J1UzUxX2
impl[algorithm-1].sort(data); K;~I;G
} %H7H0%qW
g$9s}\6B
public static interface Sort { ,M9Hdm
public void sort(int[] data); Y'x+!&H
} ft Rza
'zx1kq1
public static void swap(int[] data, int i, int j) { `;3fnTI:1
int temp = data; aeTVcq
data = data[j]; iR{*XE
data[j] = temp; MY z\ R \
} X/<Q3AK
} }&/_ S