[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; H]%mP|
} ?c|`R1D
int i1=l; J]n7| L
int i2=mid+1; u\Nw:Uu i
for(int cur=l;cur<=r;cur++){ "'Q"(S
if(i1==mid+1) kr/1Dsr4
data[cur]=temp[i2++]; {u(}ED#p
else if(i2>r) x?k
data[cur]=temp[i1++]; A^T~@AO
else if(temp[i1] data[cur]=temp[i1++]; SX_kr^#
else "sX[p
data[cur]=temp[i2++]; +t7c&td\
} n.Ur-ot
} %0ll4"
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} *@\?}cX
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改进后的归并排序: Z-? Iip{
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package org.rut.util.algorithm.support; OH-~
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import org.rut.util.algorithm.SortUtil; C }h<ldlY
#`N6<nb
/** q5?rp|7D
* @author treeroot bWX[<rh'
* @since 2006-2-2 4%',scn
* @version 1.0 ~xlMHf
*/ +LQs.*
public class ImprovedMergeSort implements SortUtil.Sort { :=iM$_tp'
W(u6J#2
private static final int THRESHOLD = 10; ZbZAx:L
;y?D1o^r8W
/* =0@d|LeZ
* (non-Javadoc) eB(S+p?
* @w#gRQCl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ijZydn
*/ =u:6b} =
public void sort(int[] data) { 94qHY1rp
int[] temp=new int[data.length]; brYYuN|Vc
mergeSort(data,temp,0,data.length-1); J^s<x#C
} 6KIjq[T^
dCoi>PO
private void mergeSort(int[] data, int[] temp, int l, int r) { )"pxry4v7J
int i, j, k; <6}f2^
int mid = (l + r) / 2; c]g<XVI
if (l == r) >'2w\Uk~:
return; OIXAjU*N
if ((mid - l) >= THRESHOLD) RAv RNd
mergeSort(data, temp, l, mid); bgzT3KZ
else '1kj:Np
insertSort(data, l, mid - l + 1); :N+#4rtgUY
if ((r - mid) > THRESHOLD) <u x*r#a!d
mergeSort(data, temp, mid + 1, r); |`)V^e_
else %/6e"o
insertSort(data, mid + 1, r - mid); _ RT"1"r
JucxhjV#,
for (i = l; i <= mid; i++) { !q=Q~ea
temp = data; P$(iB.&
} [c KI0
for (j = 1; j <= r - mid; j++) { f)AW!/
temp[r - j + 1] = data[j + mid]; }]39 iK`w
} v8'`gY
int a = temp[l]; y3@x*_K8
int b = temp[r]; (Qh7bfd
for (i = l, j = r, k = l; k <= r; k++) { A&}nRP9
if (a < b) { r0?hX
data[k] = temp[i++]; p~d)2TC4#
a = temp; ?,i#B'Z^
} else { sS1J.R
data[k] = temp[j--]; o7@4=m}
b = temp[j]; SqA+u/"j2
} ?ck^? p7
} 1EAVMJ
} jy__Y=1}
@E"+qPp.3
/** ;@7#w
* @param data p^zEfLTU
* @param l d_WnK{
* @param i Wf`OyeRz
*/ LO$#DHPt
private void insertSort(int[] data, int start, int len) { Q:fUM[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _OknP2E
} Z:B Y*#B
} c&Su d, &
} D $CY:@
} YCB 3
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堆排序： [y=$2
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package org.rut.util.algorithm.support; vVAZSR#
xeP;"J}
import org.rut.util.algorithm.SortUtil; u>Axq3F
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/** 9i2vWSga
* @author treeroot 8|jX ~f
* @since 2006-2-2 R0YC:rAt
* @version 1.0 #Zavdkw=d
*/ /4-eoTxy
public class HeapSort implements SortUtil.Sort{ c@o/Cv
/P8eI3R
/* (non-Javadoc) G$x["
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4}_w4@(
*/ H'= i
public void sort(int[] data) { xU\:Vid+A
MaxHeap h=new MaxHeap(); 1O3<%T#LOZ
h.init(data); c;|&>Fp
for(int i=0;i h.remove(); pqQdr-aR=
System.arraycopy(h.queue,1,data,0,data.length); <>*''^
} l&^[cR
_7j/[
private static class MaxHeap{ 4Utx 9^
#;*ai\6>vD
void init(int[] data){ A^Hp#b@
this.queue=new int[data.length+1]; 9 K /
for(int i=0;i queue[++size]=data; %wjU^Urya
fixUp(size); TNPGw!
} FO'. a
} #u=O 5%.
Ff#N|L'9_
private int size=0; fN*4(yw
ubCJZ"!
private int[] queue; aXK%m
EPd.atA
public int get() { U5ud?z()OA
return queue[1]; f s"V'E2a
} p_40V%y^
;k41+O:f@
public void remove() { f?<M3P
SortUtil.swap(queue,1,size--); $E~Lu$|
fixDown(1); gmAKW4(
} z#E,96R
file://fixdown NW>:Lz ?"
private void fixDown(int k) { 08jUVHdt
int j; 2|NyAtPb5
while ((j = k << 1) <= size) { QsF<=b~
if (j < size %26amp;%26amp; queue[j] j++; \FY De
if (queue[k]>queue[j]) file://不用交换 XOU-8;d
break; eg~^wi
SortUtil.swap(queue,j,k); BK\~I
k = j; "$"mWF-
} <$3nD b-
} . ;@)5"
private void fixUp(int k) { U#1yl6e\I
while (k > 1) { &lfF!
int j = k >> 1; Pymh^i
if (queue[j]>queue[k]) k#r7&Y
break; 1]3bx N
SortUtil.swap(queue,j,k); {e
k = j; ZE(RvPW
} Sl<-)a:
} |b;M5w?
6C51:XQO
} oD}FJvV
WT {Cjn
} Vq7 kA "
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SortUtil： BMj&*p8R
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package org.rut.util.algorithm; %C][E^9
>]|^Ux,WZ
import org.rut.util.algorithm.support.BubbleSort; ?d#(ian
import org.rut.util.algorithm.support.HeapSort; ?'#;Y"RT
import org.rut.util.algorithm.support.ImprovedMergeSort; (X7yNIPfA
import org.rut.util.algorithm.support.ImprovedQuickSort; Jsnmn$C
import org.rut.util.algorithm.support.InsertSort; [[DFEvOEh
import org.rut.util.algorithm.support.MergeSort; qmyZbo|8&
import org.rut.util.algorithm.support.QuickSort; 9a Ps_|C
import org.rut.util.algorithm.support.SelectionSort; %mvx}xV
import org.rut.util.algorithm.support.ShellSort; NGQIoKC
]{U*+K%,J
/** 6)<oO(
* @author treeroot -Izg&u &
* @since 2006-2-2 jW$f(qAbm
* @version 1.0 hgr ,v"
*/ qhf/B)
public class SortUtil { <0qY8
public final static int INSERT = 1; ]G&\L~P
public final static int BUBBLE = 2; K:50?r_-6
public final static int SELECTION = 3; %t|2GIu
public final static int SHELL = 4; zw9ULQ$#
public final static int QUICK = 5; ;S27m]Q?
public final static int IMPROVED_QUICK = 6; XN%D`tbvJ
public final static int MERGE = 7; 3:Egqw
public final static int IMPROVED_MERGE = 8; $/#)
public final static int HEAP = 9; uOUw8
2}\sj'0&
public static void sort(int[] data) { ^B=z_0 *
sort(data, IMPROVED_QUICK); (y4Eq*n%!
} cW/~4.v$
private static String[] name={ rtOW-cz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %a^!~qV
}; P3FpU<OBwp
2m}]z.w#
private static Sort[] impl=new Sort[]{ &|FG#.2yw
new InsertSort(), yXl.Gq>]{
new BubbleSort(), s/^=WV
new SelectionSort(), DYk->)
new ShellSort(), /38Pp%
new QuickSort(), UiN ^x
new ImprovedQuickSort(), by ee-BU
new MergeSort(), F+-MafN7Y
new ImprovedMergeSort(), 2p.+C35c=j
new HeapSort() -;.fU44O[#
}; }(O kl1
1L9 <1
public static String toString(int algorithm){ EHJc*WFPU-
return name[algorithm-1]; iv`-)UsE
} au~gJW-
>(Ddw N9l
public static void sort(int[] data, int algorithm) { jXva?_
impl[algorithm-1].sort(data); gz:c_HJ
} mM~Q!`Nf.
1:V/['|*g)
public static interface Sort { 6UP3Ij
public void sort(int[] data); 3VgH*vAU}
} I`lH6hHp
~%q e,
public static void swap(int[] data, int i, int j) { Jq@LZ2^
int temp = data; 7cQw?C
data = data[j]; ht!:e>z&4
data[j] = temp; goWt!,&f
} .SFwjriZ
} R dzIb-