[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; $Wy7z^t
} an 3"y6.8
int i1=l; NW`.RGLI<
int i2=mid+1; xP.B,1\X
for(int cur=l;cur<=r;cur++){ ,x?H]a)
if(i1==mid+1) bc"E=z
data[cur]=temp[i2++]; }TZ5/zn.Dw
else if(i2>r) _,i]ra{%
data[cur]=temp[i1++]; oVsj Q
else if(temp[i1] data[cur]=temp[i1++]; bUC-}
else fn zj@_{|
data[cur]=temp[i2++]; @xJ qG"
} j w)Lofn
} ~a[]4\m;
E/<[G?
} pCz;km
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改进后的归并排序: z^Nnt
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package org.rut.util.algorithm.support; xQ62V11R6
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import org.rut.util.algorithm.SortUtil; L!3AiAnr
fv!l{
/** ujZki.x
* @author treeroot ,|_ewye
* @since 2006-2-2 :".:Wd
* @version 1.0 &+-ZXN
*/ S<f&?\wK=v
public class ImprovedMergeSort implements SortUtil.Sort { w~EXO;L2
z= -u89]
private static final int THRESHOLD = 10; mf'N4y%
oh`I$
/* `e0U-W]kF
* (non-Javadoc) ^CTgo,uf6H
* p3:x\P<|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U`JzE"ps]
*/ +(5H$O{h
public void sort(int[] data) { owTW_V
int[] temp=new int[data.length]; GA{>=Q_~
mergeSort(data,temp,0,data.length-1); $EbxV"b+
} z12[vN
hi>Ii2T
private void mergeSort(int[] data, int[] temp, int l, int r) { Qw^nN(K!>
int i, j, k; +15j^ Az
int mid = (l + r) / 2; $=$I^hV
if (l == r) v@;:aN
return; k0?4vA
if ((mid - l) >= THRESHOLD) tnbaU%;|J
mergeSort(data, temp, l, mid); L1`^~m|
else 0/<}.Z]
insertSort(data, l, mid - l + 1); ?L#C'Lz2+
if ((r - mid) > THRESHOLD) cD8.rRyD
mergeSort(data, temp, mid + 1, r); Q{!lLka
else M}}9
insertSort(data, mid + 1, r - mid); 3O<<XXar
{o7ibw=E)
for (i = l; i <= mid; i++) { h[3N/yP
temp = data; c6s*u%+},
} "uCx.Q9ef
for (j = 1; j <= r - mid; j++) { T1;yw1/m5\
temp[r - j + 1] = data[j + mid]; ]y$D@/L@
} r!yrPwKL
int a = temp[l]; 71cc6T
int b = temp[r]; 673v
for (i = l, j = r, k = l; k <= r; k++) { _%!C;`3Y
if (a < b) { F8YD:
data[k] = temp[i++]; uJMF\G=nb
a = temp; $Ha?:jSc
} else { e%N\Pshgv
data[k] = temp[j--]; m:/@DZ
b = temp[j]; "j3Yu4_ks
} |Wj)kr !|
} F {]:
} @y->4`N
q^Lj)zmnK
/** ;=hl!CB
* @param data g8mVjM\B;
* @param l wCeSs=[
* @param i >DQl&:-)t
*/ 7'j?GzaQ+
private void insertSort(int[] data, int start, int len) { 8 +xLi4Pw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); WE4:Jy
} {O#=%o[
} K8{j oh
} OCo=h|qBp
} b=-<4Vu*\
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堆排序： J @"wJEF
d7^:z%Eb|
package org.rut.util.algorithm.support; W+a>*#*
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import org.rut.util.algorithm.SortUtil; /J3e[?78u
)qD%5} t
/** 5bv(J T
* @author treeroot XYWGX;.=
* @since 2006-2-2 V>@NkQ<|y
* @version 1.0 tHXt*tzq
*/ dI-=0v-|
public class HeapSort implements SortUtil.Sort{ w48T?
q>r9ooN
/* (non-Javadoc) B c*Rn3i@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9fvy)kX;s
*/ ;38DBo
public void sort(int[] data) { sqei(OXy
MaxHeap h=new MaxHeap(); i5|A\Wv"
h.init(data); J^pL_
for(int i=0;i h.remove(); >AV-i$4eQ@
System.arraycopy(h.queue,1,data,0,data.length); v%/_*69a
} %H~q3|z
=nA;,9%
private static class MaxHeap{ B!!xu
;Y j_@=
void init(int[] data){ }Nl-3I.S^
this.queue=new int[data.length+1]; E92dSLhs5
for(int i=0;i queue[++size]=data; <y6M@(b
fixUp(size); :r:5a(sq
} o9#
} -&M9Yg|Se
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private int size=0; <'-}6f3
G#)>D$Ck#
private int[] queue; 9HRYk13ae
J@H9nw+Q
public int get() { D._q'v<
return queue[1]; 8G1Tpn
} K`j#'`/KC
jbn{5af
public void remove() { Ngu+V
SortUtil.swap(queue,1,size--); _I&0HRi
fixDown(1); QSAz:Yvf|
} G#Nh)ff
file://fixdown =:1f 0QF
private void fixDown(int k) { * ?rw'
int j; ToCB*GlL
while ((j = k << 1) <= size) { 1*[h$Z&H?
if (j < size %26amp;%26amp; queue[j] j++; t\CVL?e`
if (queue[k]>queue[j]) file://不用交换 5(%+8<2
break; NV9D;g$Y
SortUtil.swap(queue,j,k); m!|u{<,R
k = j; 6t*pV [
} -/B}XNW
} CP|N2rb
private void fixUp(int k) { "\vEi &C
while (k > 1) { 5sM-E>8G^{
int j = k >> 1; I(s\ Q[
if (queue[j]>queue[k]) Od^y&$|_%`
break; SBAq,F'
SortUtil.swap(queue,j,k); E6NkuBQ((
k = j; MQD UJ^I$
} >VE,/?71@
} L<J';#BD
]H[RY&GY
} Zu_m$Mx
Dvo.yn|kB
} P_z3TK
zW!3>(L/
SortUtil： v~?d7p{
z\oq b)a
package org.rut.util.algorithm; "7JO~T+v
S@z$,}Yc`<
import org.rut.util.algorithm.support.BubbleSort; d\3L.5]X
import org.rut.util.algorithm.support.HeapSort; xQ* U9Wt;T
import org.rut.util.algorithm.support.ImprovedMergeSort; 6;l{9cRgc
import org.rut.util.algorithm.support.ImprovedQuickSort; Jv1.Yz
import org.rut.util.algorithm.support.InsertSort; x!{5.#
import org.rut.util.algorithm.support.MergeSort; iPa!pg4m
import org.rut.util.algorithm.support.QuickSort; 8 %Lq~lk
import org.rut.util.algorithm.support.SelectionSort; Gz+Bk5#{
import org.rut.util.algorithm.support.ShellSort; z(:0@5
zn_InxR
/** %njX'7^u
* @author treeroot uPsn~>(4
* @since 2006-2-2 a/NmM)
* @version 1.0 DCPK1ql
*/ S3MMyS8
public class SortUtil { G{knO?BK
public final static int INSERT = 1; 3:PBVt=
public final static int BUBBLE = 2; iJZqAfG{m?
public final static int SELECTION = 3; ZQD_w#0j
public final static int SHELL = 4; }wC pr.@
public final static int QUICK = 5; T3@wNAAU
public final static int IMPROVED_QUICK = 6; $`i$/FE
public final static int MERGE = 7; b~Y$!fc
public final static int IMPROVED_MERGE = 8; fk5!/>X
public final static int HEAP = 9; R KFz6t
% rRYT8
public static void sort(int[] data) { m_W\jz??k
sort(data, IMPROVED_QUICK); ;? '`XB!
} wlAlIvIT
private static String[] name={ 8%_XJyg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Agl5[{]E
}; (WVN*OR?
" nq4!
private static Sort[] impl=new Sort[]{ m[LIM}Gu
new InsertSort(), !<h*\%;
new BubbleSort(), 2ELw}9
new SelectionSort(), aG%KiJ7KEN
new ShellSort(), qy`@\)S/5
new QuickSort(), Ih;6(5z
new ImprovedQuickSort(), `ihlKFX
new MergeSort(), `pn]jpW9
new ImprovedMergeSort(), ua/A &XQx
new HeapSort() f+}?$'
}; $LRvPan`
-w1U/o.
public static String toString(int algorithm){ _UT>,c;h
return name[algorithm-1]; Dq)V] Zx
} uH^/\
.</d$FM JE
public static void sort(int[] data, int algorithm) { c+f~>AaI
impl[algorithm-1].sort(data); RgHPYf{
} 9.m_3"s
S:v]3G
public static interface Sort { >~){KV1~
public void sort(int[] data); R56:}<Y,
} ``nuw7\C:
?_%*{]mt(
public static void swap(int[] data, int i, int j) { RI!!?hYm
int temp = data; EFW'D=&h8
data = data[j]; $ii/Q:w T"
data[j] = temp; gGxgU$`#c
} i;s&;_0{
} [c+[t3dz