[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; Y1BxRd?D
} =g=Vv"B_
int i1=l; z7a@'+'
int i2=mid+1; w_Z*X5u
for(int cur=l;cur<=r;cur++){ sZokiFJ
if(i1==mid+1) _$v$v$74^
data[cur]=temp[i2++]; ^AO2%09.S
else if(i2>r) DyQvk
data[cur]=temp[i1++]; 1z3I^gI*i
else if(temp[i1] data[cur]=temp[i1++]; l_(4CimOZ
else ],wzZhA
data[cur]=temp[i2++]; O^R^Aw
} 8)J,jh9q
} XsMETl"Av4
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} RP wP4Z
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改进后的归并排序: m h|HEkM
fJY b)sN
package org.rut.util.algorithm.support; >*}m.'u
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import org.rut.util.algorithm.SortUtil; {7=k/Y*U
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/** [wJl]i
* @author treeroot QSOJHRl=C
* @since 2006-2-2 .r@'9W^8
* @version 1.0 fXkemB^)_
*/ GU)NZ[e
public class ImprovedMergeSort implements SortUtil.Sort { b*< *,Ds/G
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private static final int THRESHOLD = 10; PmDar<m
'9 <APUyu
/* ,q Bu5t
* (non-Javadoc) }5"19 Go?
* T9gQq 7(l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s06R~P4
*/ yMf["AvG
public void sort(int[] data) { iHyA;'!Os
int[] temp=new int[data.length]; y;HJ"5.Mw
mergeSort(data,temp,0,data.length-1); 4$v08zZ
} Zg!E}B:z
/A`Lyp#
private void mergeSort(int[] data, int[] temp, int l, int r) { *\[GfTL
int i, j, k; OH~I+=}.
int mid = (l + r) / 2; m*TJ@gI*t
if (l == r) k12mxR/
return; $h'>Zvf
if ((mid - l) >= THRESHOLD) 65pC#$F<x
mergeSort(data, temp, l, mid); uvGFo)9q3
else eadY(-4|I-
insertSort(data, l, mid - l + 1); 5W?r04
if ((r - mid) > THRESHOLD) +'?axv6e
mergeSort(data, temp, mid + 1, r); _"[O=h:
else fkr; a`<W
insertSort(data, mid + 1, r - mid); <1E*wPm8
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for (i = l; i <= mid; i++) { mg4:N
temp = data; zMN4cBL9m
} skfFj&_T
for (j = 1; j <= r - mid; j++) { )TgjaR9G
temp[r - j + 1] = data[j + mid]; ZlYb8+rW
} iI%"]- 0@1
int a = temp[l]; <}Rr C#uiA
int b = temp[r]; ^VB_>|UN4
for (i = l, j = r, k = l; k <= r; k++) { -"3<Ll
if (a < b) { N/mC,7Q
data[k] = temp[i++]; A*hc w
a = temp; 2<5s0GT'/
} else { NU|T`gP
data[k] = temp[j--]; YQ<O.E
b = temp[j]; p\7(IhW@
} V9kL\Ys
} dg42K`E
} nc%ly *
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/** 4 5\%2un
* @param data _zj}i1!E"
* @param l LP:C9Ol\
* @param i !/MHD
*/ m.N/g,
private void insertSort(int[] data, int start, int len) { 0sKY;(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ot_xeg;7
} P(za8l>
} |7l*
} rF5O?<(
} nXqZkZE\
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堆排序： S[cVoV
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package org.rut.util.algorithm.support; ?I.<mdhN#t
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import org.rut.util.algorithm.SortUtil; skP2IMa75
g4^df%)&
/** N!F ;!
* @author treeroot 9rsty{J8
* @since 2006-2-2 h $}&N
* @version 1.0 j*jO809%^
*/ I 0}+}{M:
public class HeapSort implements SortUtil.Sort{ E6d0YgfD
t,K_!-HX+
/* (non-Javadoc) ?Y#0Je
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,-*oc>
*/ ZKa.MBde
public void sort(int[] data) { Q2[D|{Z
MaxHeap h=new MaxHeap(); ZO $}m?
h.init(data); t`X-jr)g
for(int i=0;i h.remove(); kiFTx &gf
System.arraycopy(h.queue,1,data,0,data.length); sX,oJIt
} QeVM9br)m
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private static class MaxHeap{ "!6 Ax-'
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void init(int[] data){ RWi~34r
this.queue=new int[data.length+1]; :jq
for(int i=0;i queue[++size]=data; DKfw8"L]
fixUp(size); IU`&h2KZ.
} ApYri|^r
} qE`
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private int size=0; fhAK^@h
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private int[] queue; @^$Xy<x
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public int get() { #Xc6bA&
return queue[1]; Q1Sf7)
} 7usf^g[dh
+SSF=]4+
public void remove() { }pa@qZXh
SortUtil.swap(queue,1,size--); t*zBN!Wu_
fixDown(1); V[Jd1T
} D@(Y.&_
file://fixdown `UpZk?k
private void fixDown(int k) { 8ctUK|
int j; Yl+r>+^
while ((j = k << 1) <= size) { W|@/<K$V
if (j < size %26amp;%26amp; queue[j] j++; {Ah\-{]
if (queue[k]>queue[j]) file://不用交换 r~uWr'}a}
break; GyOo$FW
SortUtil.swap(queue,j,k); +_HPZo
k = j; zF2GW
} joh=0nk;D
} <=*xwI&q
private void fixUp(int k) { +`==US34
while (k > 1) { 6t|FuTC
int j = k >> 1; 2rq)U+
if (queue[j]>queue[k]) *1}'ZEaJ
break; 3Q`F x
SortUtil.swap(queue,j,k); &41=YnC6
k = j; s:UQ~p}"S
} b<B|p|
} $*bd})y)I
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} f_r1(o5:Y
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} Z;aQ/n[`
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SortUtil： `n]y"rj'
tdn[]|=
package org.rut.util.algorithm; !+4}x;!8
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import org.rut.util.algorithm.support.BubbleSort; {4g1Wr5=
import org.rut.util.algorithm.support.HeapSort; zF'{{7o
import org.rut.util.algorithm.support.ImprovedMergeSort; +%G*)8N3
import org.rut.util.algorithm.support.ImprovedQuickSort; %QUV351H
import org.rut.util.algorithm.support.InsertSort; ee]PFW28
import org.rut.util.algorithm.support.MergeSort; ) w.cCDL c
import org.rut.util.algorithm.support.QuickSort; N?H;fK4v
import org.rut.util.algorithm.support.SelectionSort; EnJAHgRV;e
import org.rut.util.algorithm.support.ShellSort; jZcjiOX
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/** '!64_OMj'
* @author treeroot !Jw
* @since 2006-2-2 Af:4 XSO6
* @version 1.0 y(B~)T~e@
*/ W;coi4
public class SortUtil { q79)nhC F
public final static int INSERT = 1; hSc$Sa8
public final static int BUBBLE = 2; b<qv /t)$
public final static int SELECTION = 3; ysfR@ sH7
public final static int SHELL = 4; <D4.kM
public final static int QUICK = 5; ?w1_.m|8u
public final static int IMPROVED_QUICK = 6; m&DDz+g
public final static int MERGE = 7; B&_62`
public final static int IMPROVED_MERGE = 8; `?PZvGi
public final static int HEAP = 9; $WvI%r
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public static void sort(int[] data) { rp.S4;=Q9
sort(data, IMPROVED_QUICK); |lIkmW{
} ~a8J"Wh
private static String[] name={ yOGaW~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KL!k'4JNY
}; P8e1J0A
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private static Sort[] impl=new Sort[]{ W{l+_a{/9
new InsertSort(), e =Vu;
new BubbleSort(), EVMhc"L
new SelectionSort(), ,b=&iDc
new ShellSort(), S=^yJ6xJ
new QuickSort(), p%CAicn
new ImprovedQuickSort(), G8@({EY
new MergeSort(), %O;"Z`I
new ImprovedMergeSort(), iLn)Z0<\o
new HeapSort() b7{)B?n
}; ="RDcf/
Dg/&m*Yl
public static String toString(int algorithm){ L@w|2
return name[algorithm-1]; AZxx%6
} 59O;`y0
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public static void sort(int[] data, int algorithm) { 8zGe5Dn9
impl[algorithm-1].sort(data); 'i_od|19~h
} k/O|ia6
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public static interface Sort { ;g: TsYwM
public void sort(int[] data); &F[/@
} 3x9O<H}
V< 0gD?Kx
public static void swap(int[] data, int i, int j) { [a\:K2*'
int temp = data; Lw?4xerLsb
data = data[j]; =L9sb!
data[j] = temp; 8Vv"'CU#
} 4aGV1u+4
} pzezN