[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; )X5en=[)O
} Schvwlm~i
int i1=l; 7=pJ)4;ZA
int i2=mid+1; kT4Oal+4
for(int cur=l;cur<=r;cur++){ a'YK1QX
if(i1==mid+1) |v= */e
data[cur]=temp[i2++]; YE1X*'4
else if(i2>r) Uf<IXx&;
data[cur]=temp[i1++]; <jtu/U]78|
else if(temp[i1] data[cur]=temp[i1++]; I2*\J)|f
else Ui05o7xg~p
data[cur]=temp[i2++]; QxeK-x^
} }yMAs
} H]&^>Pvh
ZR@PqS+O/
} N.|uPq$R
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改进后的归并排序: {{Z3M>Q
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package org.rut.util.algorithm.support; "oo j;
5)<}a&;{
import org.rut.util.algorithm.SortUtil; {%XDr,myd
Z)RV6@(
/** Ib0@,yS[
* @author treeroot c~{)vL0K
* @since 2006-2-2 H@BU/{
* @version 1.0 +BkmI\
*/ afj[HJbY
public class ImprovedMergeSort implements SortUtil.Sort { t^(wbC
^.(i!BG'
private static final int THRESHOLD = 10; ^y3snuLtE
+4m~D`fqt[
/* uz[5h0c
* (non-Javadoc) }?=4pGsI
* ~{f[X3m^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h . R bdG
*/ =aJb}X
public void sort(int[] data) { -aF\ u[b
int[] temp=new int[data.length]; B&4NdL/
mergeSort(data,temp,0,data.length-1); 9xIz[`)i.
} ("ulL5
G|.5.FK^
private void mergeSort(int[] data, int[] temp, int l, int r) { Yp8GW1@
int i, j, k; Nk&$b
int mid = (l + r) / 2; aW7)}"j4
if (l == r) O`Ge|4
return; KImazS^
if ((mid - l) >= THRESHOLD) zua=E2
mergeSort(data, temp, l, mid); jY ~7-
else K*fh`Kz
insertSort(data, l, mid - l + 1); %TA@-tK=
if ((r - mid) > THRESHOLD) `=VN\W^&
mergeSort(data, temp, mid + 1, r); m{C
else ;_?RPWZ;MO
insertSort(data, mid + 1, r - mid); 3ew`e"s
;-@v1I;
for (i = l; i <= mid; i++) { q8P$Md-=b1
temp = data; OAd}#R\U
} (| X?
for (j = 1; j <= r - mid; j++) { )|CF)T-
temp[r - j + 1] = data[j + mid]; kSH|+K\M4
} !(-S?*64l
int a = temp[l]; sU 5/c|&
int b = temp[r]; >(39K
for (i = l, j = r, k = l; k <= r; k++) { QzX|c&&>u2
if (a < b) { y759S)U>>p
data[k] = temp[i++]; B kWoK/f4
a = temp; 2'5%EQW;0y
} else { 8sGaq [
data[k] = temp[j--]; *:hHlH* t1
b = temp[j]; 5p`.RWls
} D_)n\(3
} zTQTmO
} c&n.JV
'}.Z' %;
/** !pG_MO
* @param data xcA5
* @param l xix:= a
* @param i ]Y@B= 5e/
*/ n*vzp?+Y
private void insertSort(int[] data, int start, int len) { l~i&r?,]^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); % C.I2J`_
} yp.\KLq8)
} UA]U_P$c
} Jx_BjkF
} s6| S#
y?*4SLy
堆排序： MH=;[| N
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package org.rut.util.algorithm.support; K84VeAe
L! DK2,
import org.rut.util.algorithm.SortUtil; =w <;tb
sGs_w:Hn
/** 7.N~e}p8
* @author treeroot \OX;ZVb?5
* @since 2006-2-2 fNTe_akp
* @version 1.0 eJ O+MurO
*/ ^CWxYDG*
public class HeapSort implements SortUtil.Sort{ }Uc)iNU
>p|tIST
/* (non-Javadoc) mcFJ__3MAV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x\MzMQ#Bf
*/ xgV(0H}Mf
public void sort(int[] data) { 0.}WZAYy~
MaxHeap h=new MaxHeap(); ygn]f*;?kw
h.init(data); QKt[Kte
for(int i=0;i h.remove(); EvQMt0[?EW
System.arraycopy(h.queue,1,data,0,data.length); zUCtH*
} c^s%t:)K
Wz]ny3K[.
private static class MaxHeap{ 896oz>
N(@B3%H2/J
void init(int[] data){ #`(-Oj2hH
this.queue=new int[data.length+1]; (^4V]N&
for(int i=0;i queue[++size]=data; heN?lmC
fixUp(size); ueD_<KjE=
} 4itadQS
} %;-]HI
u~y0H
private int size=0; fce~a\y0
r[}5<S Q
private int[] queue; ,8^QV3
ym~
public int get() { f7_EqS=(
return queue[1]; E+$%88
} PA_54a9/<
7_*k<W7|
public void remove() { ]> dCt<
SortUtil.swap(queue,1,size--); "ke>O'
fixDown(1); g=5vnY
} XV|u!'Ey
file://fixdown _2N7E#m"S
private void fixDown(int k) { "Smek#l
int j; dnW#"
while ((j = k << 1) <= size) { g4-UBDtYt
if (j < size %26amp;%26amp; queue[j] j++; K[~fpQGbV1
if (queue[k]>queue[j]) file://不用交换 mv;;0xH
break; y6C3u5`
SortUtil.swap(queue,j,k); Hk8pKpn3
k = j; O<KOsu1WW
} B{ptP4As-
} ljw(cUM
private void fixUp(int k) { N&]GPl0
while (k > 1) { /+g9C(['
int j = k >> 1; ?wpS
if (queue[j]>queue[k]) )W1tBi
break; D`e6#1DbJ
SortUtil.swap(queue,j,k); Svun RUE-f
k = j; uKL4cr@
} @j/|U04_Z
} .Fe_Z)i>h
vl,Ff9
} 3{*nG'@Mal
Q eZg l!
} 2:4:Q[{A
JsZLBq*lP
SortUtil： 9\J.AAk~/
P/e6b .M
package org.rut.util.algorithm; gXP)YN
aR0'$*3E
import org.rut.util.algorithm.support.BubbleSort; M8p6f)l3
import org.rut.util.algorithm.support.HeapSort; 7i@vj7K
import org.rut.util.algorithm.support.ImprovedMergeSort; Z| f~
import org.rut.util.algorithm.support.ImprovedQuickSort; '1r<g\l
import org.rut.util.algorithm.support.InsertSort; +IkL=/';#
import org.rut.util.algorithm.support.MergeSort; )] C"r_
import org.rut.util.algorithm.support.QuickSort; io1hUZ
import org.rut.util.algorithm.support.SelectionSort; ]b6gZ<
import org.rut.util.algorithm.support.ShellSort; }S_#*N)i
zY^QZceq"
/** X]T&kdQ6q
* @author treeroot s`63 y&Z[
* @since 2006-2-2 31> $;"
* @version 1.0 \lBY4j+;
*/ ]XS[\qo
public class SortUtil { 3UX/
public final static int INSERT = 1; 4?2$~\ x
public final static int BUBBLE = 2; qwomc28O
public final static int SELECTION = 3; >o_cf*nx
public final static int SHELL = 4; /nas~{B
public final static int QUICK = 5; r;C BA'Z
public final static int IMPROVED_QUICK = 6; &hco3HfW
public final static int MERGE = 7; (aTpBXGr=
public final static int IMPROVED_MERGE = 8; n=8DC&
public final static int HEAP = 9; XK=-$2n
-D&d1`N4
public static void sort(int[] data) { 76BA1x+G
sort(data, IMPROVED_QUICK); c*c 8S~6
} C>gC99
private static String[] name={ 8[\~}Q6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^|j @' @L
}; *<"#1H/q
GJo`9
private static Sort[] impl=new Sort[]{ oT}-i [=}
new InsertSort(), wk[4Qsk<
new BubbleSort(), hqwDlapTt
new SelectionSort(), p1`")$
new ShellSort(), p.@_3^#|
new QuickSort(), > %B7/l$
new ImprovedQuickSort(), X7Z=@d(
new MergeSort(), lVra&5
new ImprovedMergeSort(), :|PI_ $4H
new HeapSort() .wvgHi
}; $z[r(a^a
kX8Ey
public static String toString(int algorithm){ tB/'3#o
return name[algorithm-1]; ,\^RyHg
} uJ9 hU`h
4ynGXJmMlR
public static void sort(int[] data, int algorithm) { U6K!FOND
impl[algorithm-1].sort(data); h(MNH6B1
} (D~NW*,9
<Dq7^,}#
public static interface Sort { {wwkbc*
public void sort(int[] data); e.l3xwt>$
} t}x^*I$*
mVVL[z2+
public static void swap(int[] data, int i, int j) { sOb=+u$$9
int temp = data; m(rd\3d
data = data[j]; &++tp5
data[j] = temp; FL?Ndy"I
} h4geoC_W2
} G+V?c1Me