[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; o..iT:f;n
} -UBH,U
int i1=l; :'$V7LZ5
int i2=mid+1; 8 U<$u,WS
for(int cur=l;cur<=r;cur++){ GzN /0:b
if(i1==mid+1) <1pRAN0
data[cur]=temp[i2++]; SR$?pJh D%
else if(i2>r) cHAq[Ebp2!
data[cur]=temp[i1++]; o'KBe%@/
else if(temp[i1] data[cur]=temp[i1++]; W}iDT?Qi
else z=j,-d%9
data[cur]=temp[i2++]; tJa*(%Z?f
} d1>L&3HKx
} ?X'l&k>
r}4
} ,{jF)NQaP
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改进后的归并排序: PN"=P2e/ 6
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package org.rut.util.algorithm.support; ($X2SIZh
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import org.rut.util.algorithm.SortUtil; = tY%k!R
l|S_10x5
/** %%{f-\-7Ig
* @author treeroot ,R7RXpP7t
* @since 2006-2-2 y;VmA#k`
* @version 1.0 ]A,Og_g
*/ 8=,?Bh".
public class ImprovedMergeSort implements SortUtil.Sort { x4CSUcKb
HXP/2&|JY
private static final int THRESHOLD = 10; iTVepYv4m
c9ea%7o{0a
/* rebWXz7
* (non-Javadoc) q!as~{!
* M=sGPPj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^5Ob(FvU
*/ We@wN:
public void sort(int[] data) { `OHdo$Y9
int[] temp=new int[data.length]; =kBWY9:$,
mergeSort(data,temp,0,data.length-1); tKCX0UZ'
} *@fVogr^
X8 A$&
private void mergeSort(int[] data, int[] temp, int l, int r) { {S"!c.
int i, j, k; suFO~/lRno
int mid = (l + r) / 2; .GiQC{@9w
if (l == r) $p\0/
return; la_FZ
if ((mid - l) >= THRESHOLD) T5+ (Fz
mergeSort(data, temp, l, mid); K}!YXy h
else ^o[(F<q
insertSort(data, l, mid - l + 1); D%h_V>#z
if ((r - mid) > THRESHOLD) '&F PkT:5
mergeSort(data, temp, mid + 1, r); >_u5"&q
else nq*D91Q
insertSort(data, mid + 1, r - mid); B18?)LA
im@c||
for (i = l; i <= mid; i++) { s>a(#6Q
temp = data; hEfFMi=a`
} wmaj[e,h
for (j = 1; j <= r - mid; j++) { :pGgxO%q
temp[r - j + 1] = data[j + mid]; wQrD(Dv(yA
} */ok]kX'
int a = temp[l]; mO@Sl(9
int b = temp[r]; ;s w3MRJ
for (i = l, j = r, k = l; k <= r; k++) { 4@"n7/<
if (a < b) { }EJ'tio]
data[k] = temp[i++]; f4+}k GJN
a = temp; d^G5Pq
} else { r95$( N
data[k] = temp[j--]; K~jN"ev
b = temp[j]; H 2UR
} Wf9K+my
} b)+;@wa~
} xi!R[xr1
H >1mi_1
/** 8@BN6
* @param data z1~FE
* @param l Kv#TJn
* @param i #brV{dHV,
*/ ]tO9<
private void insertSort(int[] data, int start, int len) { U66zm9 3&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FW!1 0K?
} =f-.aq(G/
} o3xfif
} 5wGc"JHm
} =ms o1
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堆排序： ${w\^6&
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package org.rut.util.algorithm.support; Zmr*$,v<y
2a[_^v $v
import org.rut.util.algorithm.SortUtil; rw]*Nxgr
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/** "T'?Ah6
* @author treeroot ZHW|P
* @since 2006-2-2 09C[B+>h
* @version 1.0 zMmVYx
*/ yct^AN|%
public class HeapSort implements SortUtil.Sort{ c!}f\ ]D
x1nqhSaD
/* (non-Javadoc) vW:XM0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =a3qpPkx
*/ _'47yq^O
public void sort(int[] data) { -jOCzp
MaxHeap h=new MaxHeap(); 3gzcpFNqX
h.init(data); _N&]w*ce
for(int i=0;i h.remove(); 60u}iiC@
System.arraycopy(h.queue,1,data,0,data.length); p4-bD_
} "mm|0PUJ
(e$/@3*
private static class MaxHeap{ .^J7^Ky,
|p7k2wzN
void init(int[] data){ ZT;:Hxv0N
this.queue=new int[data.length+1]; |2eF~tJqc
for(int i=0;i queue[++size]=data; 0aS&!"o!
fixUp(size); M)oJ06`K
} xRx8E;Q@h?
} W~&PGmRI
M!ra3Y
private int size=0; 0G.y_<=
d\{#*{_A
private int[] queue; wEImpsC`
)FG<|G(
public int get() { iVKX *kqc
return queue[1]; ped3}i+|]
} xgeKz^,
#' =rv
public void remove() { MFyMo
SortUtil.swap(queue,1,size--); *qLOr6
fixDown(1); DNy1} 3wg
} ktr l|
file://fixdown e8TJ =}\
private void fixDown(int k) { Z-!W#
int j; 8\~IwtSk
while ((j = k << 1) <= size) { :W/,V^x}
if (j < size %26amp;%26amp; queue[j] j++; U 6y ;V
if (queue[k]>queue[j]) file://不用交换 jy]<q^J
break; c !ybz{L
SortUtil.swap(queue,j,k); C(-bh]J
k = j; 'ErtiD
} 6c3+q+#J2
} FshQ OFW
private void fixUp(int k) { ?^F#}>C
while (k > 1) { a/.O,&3
int j = k >> 1; R,hX *yVq
if (queue[j]>queue[k]) VK+#!!Ha
break; ~67L
SortUtil.swap(queue,j,k); (YjY=F
k = j; [`^x;*C
} a$c7d~p$I
} VY'#>k}}
"jVMk
} -IR9^)
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} ^Slwg|t*~P
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SortUtil： wovWEtVBU
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package org.rut.util.algorithm; $cev,OW6]
^P-!pK*
import org.rut.util.algorithm.support.BubbleSort; DVYY1!j<
import org.rut.util.algorithm.support.HeapSort; /q%TjQ}F
import org.rut.util.algorithm.support.ImprovedMergeSort; %S22[;v{N
import org.rut.util.algorithm.support.ImprovedQuickSort; 0\AYUa?RM
import org.rut.util.algorithm.support.InsertSort; Gb%PBg}HH
import org.rut.util.algorithm.support.MergeSort; l}X3uyS
import org.rut.util.algorithm.support.QuickSort; apUV6h-v
import org.rut.util.algorithm.support.SelectionSort; l[^bo/
import org.rut.util.algorithm.support.ShellSort; -t %.I=|
uH]n/Kv1,
/** ;w?zmj<Dm
* @author treeroot io:?JnQSA
* @since 2006-2-2 Zx<s-J4o=w
* @version 1.0 KhZ'Ic[vw
*/ Dw{C_e
public class SortUtil { MQ"<r,o?:
public final static int INSERT = 1; *Yov>lO
public final static int BUBBLE = 2; n$}c+1
public final static int SELECTION = 3; 52*zX 3
public final static int SHELL = 4; bdqo2ZO
public final static int QUICK = 5; PG)dIec
public final static int IMPROVED_QUICK = 6; hGF:D#jyT
public final static int MERGE = 7; +98~OInySZ
public final static int IMPROVED_MERGE = 8; }(J6zo9(x
public final static int HEAP = 9; 4MRHz{`wa
uZId.+Rk
public static void sort(int[] data) { (XT^<#Ga
sort(data, IMPROVED_QUICK); sJ?Fque
} E](Ood
private static String[] name={ kvSSz%R~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fYx$3a.
}; LtH;#Q
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private static Sort[] impl=new Sort[]{ o?^j1\^
new InsertSort(), mRfF)
new BubbleSort(), V}7I? G
new SelectionSort(), ctdV4%^{
new ShellSort(), CbS9fc&
new QuickSort(), R$(,~~MH
new ImprovedQuickSort(), :(A]Bm3
new MergeSort(), 7Y@&&
new ImprovedMergeSort(), Uh?SDay
new HeapSort() ^7TM.lE
}; v8 ggPI
wC<!,tB(8
public static String toString(int algorithm){ Q?7UiTZ
return name[algorithm-1]; t1g)Y|@d
} 6/s#'#jh
tQz-tQg
public static void sort(int[] data, int algorithm) { Sxjwqqv
impl[algorithm-1].sort(data); sqJ?dIBH
} 2HkP$;lED
~;il{ym
public static interface Sort { 5"^$3&)
public void sort(int[] data); ?8b?{`@V
} }LDDm/$^}
gAgzM?A1(
public static void swap(int[] data, int i, int j) { h+CTi6-p
int temp = data; &'c1"%*%8>
data = data[j]; 0z_e3H{P27
data[j] = temp; #r#UO
} 5Ee%!Pk
} !m'lOz