[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; `:!mPNW#
} eD/O)X
int i1=l; ~;k-/Z"
int i2=mid+1; ^AK<]r<?L?
for(int cur=l;cur<=r;cur++){ Juj"cjob
if(i1==mid+1) HDZB)'I
data[cur]=temp[i2++]; EV| 6._Z(D
else if(i2>r) "5u*C#T2$
data[cur]=temp[i1++]; %mPIr4$Pg
else if(temp[i1] data[cur]=temp[i1++]; TaeN?jc5
else An!1>`8r
data[cur]=temp[i2++]; $^?"/;8P5
} [ !/u,
} 6lOT5C eJ"
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} 9F)+p7VJq
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改进后的归并排序: DZ -5A
6gV-u~j[#
package org.rut.util.algorithm.support; {/G~HoY1i
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import org.rut.util.algorithm.SortUtil; M_*"g>Z
~wf&78
/** YKKZRlQo
* @author treeroot 9`Bmop
* @since 2006-2-2 B-PN +P2
* @version 1.0 "n3r,
*/ S0\QZ/je
public class ImprovedMergeSort implements SortUtil.Sort { :["iBrFp
~kPHf_B;z
private static final int THRESHOLD = 10; esU9
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/* ZN#mu]jC?
* (non-Javadoc) }M-^A{C\%
* ?aOx b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N,fEta6
*/ _K["qm{X_
public void sort(int[] data) { #&<>|m
int[] temp=new int[data.length]; qww*
mergeSort(data,temp,0,data.length-1); ]R[j]E.
} 3y?I^ .B
)(yD"]co
private void mergeSort(int[] data, int[] temp, int l, int r) { }-QFMPXhG
int i, j, k; Kab"r_'
int mid = (l + r) / 2; E{x<P0 ;
if (l == r) 0N.B=j|
return; 0Cd)w4C
if ((mid - l) >= THRESHOLD) BUB$k7{z
mergeSort(data, temp, l, mid); Gy 0 m
else UW%zR5q
insertSort(data, l, mid - l + 1); }2c)UQD8
if ((r - mid) > THRESHOLD) ,9;RP/"7
mergeSort(data, temp, mid + 1, r); 2$ m#)*\
else -Uj)6PzGu
insertSort(data, mid + 1, r - mid); C#<b7iMg
,5}%_
for (i = l; i <= mid; i++) { *-Y`7=^$
temp = data; &w15GO;4
} i2.g}pM.A
for (j = 1; j <= r - mid; j++) { b)ytm=7ha
temp[r - j + 1] = data[j + mid]; pUbf]3 t
} %-9?rOr
int a = temp[l]; J:W|2U="
int b = temp[r]; V+`gkWe/
for (i = l, j = r, k = l; k <= r; k++) { 24{Tl q3
if (a < b) { @ ;T|`Y=7
data[k] = temp[i++]; Hwb+@'o
a = temp; M9[52D!{
} else { G-7!|&
data[k] = temp[j--]; a ]~Rp
b = temp[j]; gR5 EK$
} v9*ugu[K9
} A]<+Aq@{
} [d"]AF[#
d `MTc
/** <'T:9
* @param data Z%&$_-yJ
* @param l -9PJ4"H
* @param i 6chcpP0
*/ Fw{:fFZC[
private void insertSort(int[] data, int start, int len) { y~ 2C2'7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); L i g7Ac,
} nm#ISueh
} DtEvt+h
} IvZ,|R?
} ztS:1\
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堆排序： 7Gh+EJJ3I
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package org.rut.util.algorithm.support; WHF[l1
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import org.rut.util.algorithm.SortUtil; lwSZpS
[,bra8f[C
/** a^vTBJXo
* @author treeroot cy-o@U"s8
* @since 2006-2-2 jT'09r3P
* @version 1.0 !+FrU'^
*/ ~:krJ[=
public class HeapSort implements SortUtil.Sort{ |l-~,eRvi5
&xWej2a!
/* (non-Javadoc) d6+$[4w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .IU\wN
*/ Rs@>LA
public void sort(int[] data) { WqO4_;X6/
MaxHeap h=new MaxHeap(); 4j1$1C{
h.init(data); MD):g@
for(int i=0;i h.remove(); F$sDmk#
System.arraycopy(h.queue,1,data,0,data.length); 7!;H$mxP
} tE8aL{<R
O7"16~a
private static class MaxHeap{ i7XM7+}
3<x1s2U
void init(int[] data){ ,+4*\yI3l
this.queue=new int[data.length+1]; unF=";9H
for(int i=0;i queue[++size]=data; ]*Cq'<h$
fixUp(size); ^`S.Mw.
} nYnBWDnV
} ;?G..,
6}cN7wnm j
private int size=0; [xdi.6%
/ q| o
private int[] queue; Pihpo
} *jmWP
public int get() { ~H c5M5m
return queue[1]; i7b^b>B|e
} ElA(1o|9I
R=J5L36F
public void remove() { sj3[ny;b
SortUtil.swap(queue,1,size--); /:d6I].
fixDown(1); "x0/i?pqa
} ]]NTvr
file://fixdown 7O-fc1OTv
private void fixDown(int k) { 1)#dgsa
int j; K|Xr~\=
while ((j = k << 1) <= size) { "s.hO0Z
if (j < size %26amp;%26amp; queue[j] j++; gtnu/Q
if (queue[k]>queue[j]) file://不用交换 0VZC7@
break; F!<!)_8Q
SortUtil.swap(queue,j,k); feJl[3@tO
k = j; W1&"dT@
} ||))gI`3a
} &^7(?C'u
private void fixUp(int k) { Vb)NWXmyu
while (k > 1) { u}.mJDL
int j = k >> 1; d"tR?j
if (queue[j]>queue[k]) nT%ko7~-
break; 7]_zWx,r
SortUtil.swap(queue,j,k); qP$)V3l
k = j; `B~zB=}
} &~c`p[
} <1#hX(Q
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} X"sJiFS
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} D\| U_>
k;Fxr%
SortUtil： @*E=O|
6ZAZJn|
package org.rut.util.algorithm; (^"2"[?a
q+} \(|
import org.rut.util.algorithm.support.BubbleSort; e{H(
import org.rut.util.algorithm.support.HeapSort; 4peRbm
import org.rut.util.algorithm.support.ImprovedMergeSort; k=cDPu -
import org.rut.util.algorithm.support.ImprovedQuickSort; dZox;_b
import org.rut.util.algorithm.support.InsertSort; +sV~#%%
import org.rut.util.algorithm.support.MergeSort; iuA_Jr
import org.rut.util.algorithm.support.QuickSort; phQ{<wzwp
import org.rut.util.algorithm.support.SelectionSort; H>Ucmd;ay
import org.rut.util.algorithm.support.ShellSort; \XO'7bNu-
ia (&$a8X
/** R9(Yi<CC
* @author treeroot 1IlOU|4
* @since 2006-2-2 ^X?uAX-RP|
* @version 1.0 M!D6i5k,
*/ Ss0I{0
public class SortUtil { cvQAo|
public final static int INSERT = 1; ~9"c64 q
public final static int BUBBLE = 2; |+KwyHE`9
public final static int SELECTION = 3; 1:r#m- \
public final static int SHELL = 4; pSI8"GwQ
public final static int QUICK = 5; -$X4RS
public final static int IMPROVED_QUICK = 6; !>V)x
public final static int MERGE = 7; 1=,y+Xpw
public final static int IMPROVED_MERGE = 8; $}'(%\7"
public final static int HEAP = 9; ExMd$`gW
d"n"A?nXh
public static void sort(int[] data) { ~ivOSr7s}
sort(data, IMPROVED_QUICK); pTB7k3g
} <s7cCpUFP
private static String[] name={ K- $,:28
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6^!fuIZ;_
}; zWv0y8[d
B=$O4nW_b
private static Sort[] impl=new Sort[]{ G')zDx
new InsertSort(), bdLi_k
new BubbleSort(), :`Ep#[Wvo
new SelectionSort(), 6B% h
new ShellSort(), FE]UqB
new QuickSort(), YRCs&tgs
new ImprovedQuickSort(), gWoUE7.3`
new MergeSort(), s2GF*{
new ImprovedMergeSort(), !%D';wQ,/
new HeapSort() 1q@R04i
}; ,Si{]y
I{r*Y9
public static String toString(int algorithm){ C\aHr!
return name[algorithm-1]; qTN%9!0@9
} 0?(uqjD:
?Pp*BB,*y
public static void sort(int[] data, int algorithm) { K!.t}s.t
impl[algorithm-1].sort(data); i;U*Y *f
} Kvo&_:
dS3\P5D.*c
public static interface Sort { L<0_e^8
public void sort(int[] data); 1kw*Q:
} 3l45(%g+
11YJW-V
public static void swap(int[] data, int i, int j) { Eu:/U*j
int temp = data; 'vZIAnB8
data = data[j]; 16Jq*hKU
data[j] = temp; iB"ji4[z
} fZ5 UFq_~s
} zfv@<'