[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; oc\rQ?
} RFg$N@g,
int i1=l; 4y 582u6^
int i2=mid+1; dHf_&X2A
for(int cur=l;cur<=r;cur++){ rS(693kb
if(i1==mid+1) nF A7@hsm
data[cur]=temp[i2++]; \e'>$8%T
else if(i2>r) SAThY$)6
data[cur]=temp[i1++]; f} }Bb8
else if(temp[i1] data[cur]=temp[i1++]; "St,4b
else _QY0j%W
data[cur]=temp[i2++]; 8"8sI
} n8zUL1:R
} ~+3f8%
`9S<E
} x3wyIio*
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改进后的归并排序: Cd|V<BB9
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package org.rut.util.algorithm.support; QnaMjDh$6
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import org.rut.util.algorithm.SortUtil; w`>xK sKW>
d<7xSRC
/** )_xM)mH
* @author treeroot qZ_^#%zO
* @since 2006-2-2 uO7Ti]H
* @version 1.0 \vFkhm
*/ H[]j6D
public class ImprovedMergeSort implements SortUtil.Sort { ]C)PZZI='
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private static final int THRESHOLD = 10; bB)EJCPq>
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/* ih ,8'D4
* (non-Javadoc) : ]CZS
* Xg,E;LSF8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /Pg66H#RUf
*/ 2{+\\.4Evk
public void sort(int[] data) { J&8l1{gd
int[] temp=new int[data.length]; zq{L:.#ha
mergeSort(data,temp,0,data.length-1); ,"j|0Q
} .O1g'%
:Q?xNY%
private void mergeSort(int[] data, int[] temp, int l, int r) { )vuxy
int i, j, k; fKrOz!b
int mid = (l + r) / 2; jew?cnRmd
if (l == r) 5"XcVH4g
return; oh& PQ{
if ((mid - l) >= THRESHOLD) {T:2+iS9:
mergeSort(data, temp, l, mid); ]lZ!en
else ?1OS%RBF
insertSort(data, l, mid - l + 1); InPq1AH
if ((r - mid) > THRESHOLD) ;"joebZ/
mergeSort(data, temp, mid + 1, r); E@t~juF!
else ,6a'x~y<r
insertSort(data, mid + 1, r - mid); <bGSr23*
~(I\O?k>H
for (i = l; i <= mid; i++) { zpg*hlv
temp = data; WNd(X}
} RMLs(?e
for (j = 1; j <= r - mid; j++) { DJrA@hm/Y
temp[r - j + 1] = data[j + mid]; s'} oVx]
} gtCd#t'(V
int a = temp[l]; mKxQU0`
int b = temp[r]; 17<\Q(YQ=
for (i = l, j = r, k = l; k <= r; k++) { }4eSB
if (a < b) { +sgishqn9
data[k] = temp[i++]; gR~XkU
a = temp; xQaN\):^8
} else { @xO<~
data[k] = temp[j--]; uiDR}
b = temp[j]; 47 m:z5;
} Dyt}"r\
} (MNbABZQ
} v>7=T8
||qsoF5B]
/** sEhdkN}6
* @param data A5?[j QT0
* @param l nW{7L
* @param i -] J V
*/ 3(AgUq
private void insertSort(int[] data, int start, int len) { AbLOq@lrK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;znIY&Z
} tM{t'WU
} -- _,;
} ZHw)N&Qn
} _Y}(v((;
e[R364K
堆排序： #XC\=pZX
oqUtW3y
package org.rut.util.algorithm.support; g<}K^)x
uWi+F)GS^K
import org.rut.util.algorithm.SortUtil; :[\}Hn=
7CM<"pV
/** Q> @0'y=s
* @author treeroot a{Tv#P*!
* @since 2006-2-2 1_GUi
* @version 1.0 MlS<txFPS
*/ (y#8z6\dx
public class HeapSort implements SortUtil.Sort{ uF@Q8 7G
8~rD#8`6j
/* (non-Javadoc) {!'AR`|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _j<46^
*/ #Du1(R
public void sort(int[] data) { 7c4\'dt#
MaxHeap h=new MaxHeap(); z#bOFVg#
h.init(data); hofZpM
for(int i=0;i h.remove(); 9:YiLoz?
System.arraycopy(h.queue,1,data,0,data.length); d t0?4 d
} KQQR"[z&V
1 ljgq]($
private static class MaxHeap{ HtmJIH:
oACuI|b
void init(int[] data){ JBi<TDm/
this.queue=new int[data.length+1]; ,$W7Q
for(int i=0;i queue[++size]=data; )Hl;9
fixUp(size); SvDVxK
} GG%j+Ed
} H%Q@DW8~@
#N@sJyIN
private int size=0; VJZ
EvQN(_
private int[] queue; (ioi !p
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public int get() { 3H@TvV/;f
return queue[1]; ,j9}VnW)
} R;'Pe>
UiaY0 .D
public void remove() { 6D3fkvcZ
SortUtil.swap(queue,1,size--); TQ>kmHWf/
fixDown(1); f}eZX
} Lgvmk
file://fixdown Zpl?zI
private void fixDown(int k) { N;<<-`i
int j; T4o}5sq}S
while ((j = k << 1) <= size) { eP[azC"G[
if (j < size %26amp;%26amp; queue[j] j++; rK}*Uwut
if (queue[k]>queue[j]) file://不用交换 q.uIZ
break; q;t T*B W
SortUtil.swap(queue,j,k); \W}?4kz
k = j; mcp}F|ws
} aq,&W q@
} <iJ->$
private void fixUp(int k) { )#IiHBF
while (k > 1) { xREqcH,vU
int j = k >> 1; @6}c\z@AxM
if (queue[j]>queue[k]) { S4?L8
break; r?[PIf
SortUtil.swap(queue,j,k); '1^\^)&q
k = j; U#d&#",s
} t<~riFs]
} ~U ?cL-`n
'zi5ihiT
} &tHT6,Xv(
"2N3L8?k
} VO#]IXaP
K=+w,H#`C
SortUtil： C&Ow*~
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package org.rut.util.algorithm; ^e<0-uM"s
WLv( K_3Y
import org.rut.util.algorithm.support.BubbleSort; %+Mi~k*A'
import org.rut.util.algorithm.support.HeapSort; `3/,-
import org.rut.util.algorithm.support.ImprovedMergeSort; $zyY"yWRZ
import org.rut.util.algorithm.support.ImprovedQuickSort; W&TPrB
import org.rut.util.algorithm.support.InsertSort; rsOon2|
import org.rut.util.algorithm.support.MergeSort; s|%mGt &L
import org.rut.util.algorithm.support.QuickSort; b3<<4Vf
import org.rut.util.algorithm.support.SelectionSort; g9'50<|J
import org.rut.util.algorithm.support.ShellSort; K?(ls$
E;| q
/** [$OD+@~A2
* @author treeroot 2,E&}a|;b
* @since 2006-2-2 Pm%ZzU
* @version 1.0 <P(d%XEl
*/ QYyF6ht=!
public class SortUtil { 6wIv7@Y
public final static int INSERT = 1; kHm1aE<
public final static int BUBBLE = 2; dkLc"$(O
public final static int SELECTION = 3; *N[.']#n
public final static int SHELL = 4; O&E1(M|*>
public final static int QUICK = 5; FFK79e/5
public final static int IMPROVED_QUICK = 6; o5i?|HJ
public final static int MERGE = 7; r-H~MisL
public final static int IMPROVED_MERGE = 8; E6y/,s^~S_
public final static int HEAP = 9; gB71~A{J
Y}(v[QGV
public static void sort(int[] data) { 6V*@ {
sort(data, IMPROVED_QUICK); 4US8B=jk
} V0c*M>V
private static String[] name={ k2,n:7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V.:a6>]
}; = 14'R4:
]J5[ZVz
private static Sort[] impl=new Sort[]{ it D%sKo
new InsertSort(), `i,ZwnLh{
new BubbleSort(), %4imlP
new SelectionSort(), ORp6
new ShellSort(), ZgZ}^x
new QuickSort(), ]cLpLA"
new ImprovedQuickSort(), Tf21K9+`L
new MergeSort(), )p(5$AR7
new ImprovedMergeSort(), zPH1{|H+l
new HeapSort() uy~5!i&
}; *8kg6v%
4~ZQsw`
public static String toString(int algorithm){ #W~5M ?+
return name[algorithm-1]; /n/U)!tp
} JrOp-ug
f(|qE(
public static void sort(int[] data, int algorithm) { 0{gvd"q
impl[algorithm-1].sort(data); v>~ottQ|
} lk2F]@_kJH
tA3]6SIK@
public static interface Sort { 0$":W
public void sort(int[] data); ](x4q
} (GMKIw2
9'Pyo`hJ#U
public static void swap(int[] data, int i, int j) { n<"?+bz"<
int temp = data; J=Ak+J
data = data[j]; B.'@~$
data[j] = temp; 43A6B
} .hSacd
} z%`Tf&UL