[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; "X=^MGV
} p%Q{Rqc)
int i1=l; 1z; !)pG.
int i2=mid+1; 5T"h7^}e
for(int cur=l;cur<=r;cur++){ }.u[';q]S
if(i1==mid+1) c.Izm+9k
data[cur]=temp[i2++]; I+Y Z+
else if(i2>r) N f?\O@
data[cur]=temp[i1++]; <`q-#-V@
else if(temp[i1] data[cur]=temp[i1++]; }<z[t5
else Z3<lJk\Y
data[cur]=temp[i2++]; !#1UTa
} MB5V$toC
} <}mA>c'k
fyZtwl@6w#
} sj+ )
@CPkP
改进后的归并排序: $/u.F;
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package org.rut.util.algorithm.support; F&k<P>k
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import org.rut.util.algorithm.SortUtil; >0:=<RW
5a5JOl$8
/** pNHL&H\
* @author treeroot u#ocx[
* @since 2006-2-2 wlwgYAD
* @version 1.0 -hK^*vJ
*/ hZ>1n&[@
public class ImprovedMergeSort implements SortUtil.Sort { '\pSUp
? _[q{i{
private static final int THRESHOLD = 10; _Fkb$NJ"]Q
@q|c|X:I
/* ^MWp{E
* (non-Javadoc) HT_nxe`E
* 7*+tG7I @
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5M%)*.Y 3[
*/ -t*P=V|@
public void sort(int[] data) { $-]9/Ct
int[] temp=new int[data.length]; 2 I.Q-'@
mergeSort(data,temp,0,data.length-1); 0sq?>$~Kc*
} V' sq'XB
PTF|"^k+
private void mergeSort(int[] data, int[] temp, int l, int r) { @Y%i`}T%(
int i, j, k; >b*}Td~J
int mid = (l + r) / 2; UE/iq\a>
if (l == r) 7Zh#7jiZ`
return; @ +>>TGC
if ((mid - l) >= THRESHOLD) tv9 R$-cJ
mergeSort(data, temp, l, mid); 7':qx}c#!1
else 8$V:+u
insertSort(data, l, mid - l + 1); db0]D\
if ((r - mid) > THRESHOLD) OVa38Aucr3
mergeSort(data, temp, mid + 1, r); !OL[1_-4|K
else RGV}c#
insertSort(data, mid + 1, r - mid); Hw 1cc3!
CKr5L
for (i = l; i <= mid; i++) { F<LRo}j"9Q
temp = data; ;{f4E)t 7
} _2E*
for (j = 1; j <= r - mid; j++) { 4g^Xe-
temp[r - j + 1] = data[j + mid]; 8a,pDE
} n|AV7c
int a = temp[l]; ;kb);iT
int b = temp[r]; 5tQZf'pHfd
for (i = l, j = r, k = l; k <= r; k++) { {'$+?V"&
if (a < b) { 0:`*xix
data[k] = temp[i++]; G*_qqb{B
a = temp; &0i$Y\g
} else { 0O[le*3b
data[k] = temp[j--]; #p ;O3E@
b = temp[j]; ST2:&xH(
} (&Rql7](8
} ] n\]ao
} J-Tiwl
ON){d!]uJ
/** fO&`A:JY
* @param data [#q]B=JB
* @param l (Jw_2pHxr"
* @param i kI)}7e
*/ &v0-$
private void insertSort(int[] data, int start, int len) { w\YS5!P,V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sqtz^K ROM
} T7,]^ 1
} ttsR`R1.k
} 6!m#;8 4
} 5~[7|Y
hu}$\
堆排序： el9P@r0
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package org.rut.util.algorithm.support; MYS`@%ZV#k
}HoCfiE=X
import org.rut.util.algorithm.SortUtil; M}\h?s
]/=RABi
/** V+E8{|dYL
* @author treeroot Ou_H&R
* @since 2006-2-2 {cXr!N^K
* @version 1.0 z{rV|vQ
*/ BPO5=]W 7
public class HeapSort implements SortUtil.Sort{ BiYxI{VFD
Z}+}X|
/* (non-Javadoc) qIi \[Ugh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3a?-UT!
*/ }4|EHhG
public void sort(int[] data) { ^K?-+
MaxHeap h=new MaxHeap(); MGR:IOTa
h.init(data); kUd]8Ff!
for(int i=0;i h.remove(); h9)S&Sk{s
System.arraycopy(h.queue,1,data,0,data.length); ` 2W^Ui,4
} U,=f};
W+ S~__K
private static class MaxHeap{ eYUb>M)
U~x]2{}
void init(int[] data){ <mn[-
this.queue=new int[data.length+1]; lz,M$HG<[
for(int i=0;i queue[++size]=data; <V&0GAZ
fixUp(size); N:lfKI
} h:aa^a~yi
} E4X6f
uM2@&)u
private int size=0; N'`X:7fN
?:"ABkL|+Y
private int[] queue; W"NI^OX
[^qT?se{
public int get() { &,&+p0CSI!
return queue[1]; N"70P/
} [}L~zn6>?a
c{M ,K
public void remove() { gb_Y]U
SortUtil.swap(queue,1,size--); &K/?#
fixDown(1); J,Sa7jv[
} z<%P"
file://fixdown 2R/|/>T v
private void fixDown(int k) { :K| H/kht
int j; _uIS[%4g
while ((j = k << 1) <= size) { ;R?@ D]
if (j < size %26amp;%26amp; queue[j] j++; vIV|y>;g
if (queue[k]>queue[j]) file://不用交换 cN,*QN
break; `!]|lI!GW
SortUtil.swap(queue,j,k); &;@L] o
k = j; {-Y;!
} PT/Nz+
} $+4DpqJ
private void fixUp(int k) { kdNo<x1o
while (k > 1) { <`nShP>vl
int j = k >> 1; N5?bflY
if (queue[j]>queue[k]) Gx C+lqH#
break; xM jn=\}
SortUtil.swap(queue,j,k); ]C \+b<
k = j; 3xyrWl
} dtTn]}J
} R"t#dG]1t
8V:;HY#
} 6W i n!4
xi (@\A
} \J^#2{d
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SortUtil： io#}z4"'qY
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package org.rut.util.algorithm; tq L(H25z
x3O%W?5
import org.rut.util.algorithm.support.BubbleSort; 3ahriZe
import org.rut.util.algorithm.support.HeapSort; @O#!W]6NT6
import org.rut.util.algorithm.support.ImprovedMergeSort; )@wC6Ij
import org.rut.util.algorithm.support.ImprovedQuickSort; Xh"9Bcjf
import org.rut.util.algorithm.support.InsertSort; *)K 5<}V
import org.rut.util.algorithm.support.MergeSort; `D+zX
import org.rut.util.algorithm.support.QuickSort; tT]@yo|?e/
import org.rut.util.algorithm.support.SelectionSort; !JCs'?A
import org.rut.util.algorithm.support.ShellSort; V(S7mA:T
aT0~C.vT
/** k(ouE|B
* @author treeroot J9T2 p\5
* @since 2006-2-2 fK/:
* @version 1.0 h#0n2o#
*/ i%i~qTN
public class SortUtil { yY$^ R|t
public final static int INSERT = 1; Y:\msq1xp
public final static int BUBBLE = 2; 3bRxV @0.
public final static int SELECTION = 3; s$fM,l:!
public final static int SHELL = 4; +g1>h,K 3
public final static int QUICK = 5; TEV DES
public final static int IMPROVED_QUICK = 6; vj?{={Y
public final static int MERGE = 7; kQ+y9@=/g
public final static int IMPROVED_MERGE = 8; J^+w]2`S
public final static int HEAP = 9; Z %pc"
?b_E\8'q]
public static void sort(int[] data) { WuK<?1meN
sort(data, IMPROVED_QUICK); 4?pb!@l
} t'_EcYNS
private static String[] name={ 2s}S9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dS1HA>c)O
}; UBd+,]"f
S*l/ Sa@
private static Sort[] impl=new Sort[]{ h8V*$
new InsertSort(), ;+75"=[YT
new BubbleSort(), tw4,gW
new SelectionSort(), l,|Llb
new ShellSort(), +P(*S
new QuickSort(), #Y= A#Yz,{
new ImprovedQuickSort(), A"*=K;u/|m
new MergeSort(), 8u*<GbKGI
new ImprovedMergeSort(), H&s`Xr
new HeapSort() ykQb;ZP8jh
}; a 4?A 5
qT?{}I
public static String toString(int algorithm){ !Yc:yF
return name[algorithm-1]; 99OZK
} xOkduk]
5 3pW:`
public static void sort(int[] data, int algorithm) { E$%v);u
impl[algorithm-1].sort(data); t'K+)OK
} 3nA^s"#p
59nRk}^$se
public static interface Sort { DT-.Gdb8
public void sort(int[] data); |?KYY0
} 8cO?VH,nk
YI0l&'7
public static void swap(int[] data, int i, int j) { @>2]zMFf
int temp = data; "e-z2G@z
data = data[j]; ztU"CRa8
data[j] = temp; cK|Uwzifd
} B2r[oT R
} 3nBZ+n4z