[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; Q S5dP
} MiRibHXI,
int i1=l; nZ"{y
int i2=mid+1; y?[5jL|Ue
for(int cur=l;cur<=r;cur++){ ]r"31.w(
if(i1==mid+1) ~GAlNIv]
data[cur]=temp[i2++]; h<+PP]l=
else if(i2>r) b0!*mrF]6
data[cur]=temp[i1++]; lO%MyP
else if(temp[i1] data[cur]=temp[i1++]; M-{b
else vd2uD2%con
data[cur]=temp[i2++]; LZgwIMd
} l~`txe
} MA~|y_V
H(
} x8\E~6`,
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改进后的归并排序: n ;Ql=4
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package org.rut.util.algorithm.support; aS c#&{
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import org.rut.util.algorithm.SortUtil; &*Q|d*CP
7}.#Z
/** >1#DPU(g
* @author treeroot yBpW#1=
* @since 2006-2-2 $q4XcIX 7
* @version 1.0 sURUQ H
*/ )->-~E}p9
public class ImprovedMergeSort implements SortUtil.Sort { j<`I\Pmv
p.6$w:eV
private static final int THRESHOLD = 10; UchALR^5
i{Y=!r5r
/* K,`).YK
* (non-Javadoc) IKNFYe[9e
* Jnh;;<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <Tj"GVZAEO
*/ 0"wbcAh)
public void sort(int[] data) { fvAh?<Ul
int[] temp=new int[data.length]; [lDt0l5^
mergeSort(data,temp,0,data.length-1); }qgqb
} L8,H9T#e
)R [@G.
private void mergeSort(int[] data, int[] temp, int l, int r) { q/W{PBb-2k
int i, j, k; xiOv$.@q
int mid = (l + r) / 2; |G`4"``]k
if (l == r) ]be0I)
return; l%-67(
if ((mid - l) >= THRESHOLD) 4~]8N@Bii
mergeSort(data, temp, l, mid); [ZL r:2+z
else B|Rpm^|
insertSort(data, l, mid - l + 1); &0;{lS[N:L
if ((r - mid) > THRESHOLD) P#vv+]/
mergeSort(data, temp, mid + 1, r); 3B!&ow<rt
else N}.Q%&6:
insertSort(data, mid + 1, r - mid); sRo<4U0M;l
)A>U<n$h
for (i = l; i <= mid; i++) { Zi[{\7a
temp = data; wiK@o$S-
} lOowMlf@2
for (j = 1; j <= r - mid; j++) { F^%{ ;
temp[r - j + 1] = data[j + mid]; w@gl
} `? 9]'
int a = temp[l]; Z9;nC zHm
int b = temp[r]; %x cM_|AyR
for (i = l, j = r, k = l; k <= r; k++) { zm;*:]S
if (a < b) { s+y'<88
data[k] = temp[i++]; (Fbm9(q$d
a = temp; } K+Q9<~u
} else { 7gZVg@
data[k] = temp[j--]; {kRDegby
b = temp[j]; Skr\a\ J
} 0`g}(}'L
} T@d_t
} 4 _c:Vl
$v?! 6:
/** ,J`lr U0
* @param data Rsa\V6N>
* @param l *_"c!eW
* @param i &kXGWp
*/ V,|Bzcz
private void insertSort(int[] data, int start, int len) { aOAwezfYR
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5CRc]Q#@
} &2<&X( )
} }Uqa8&
} WacU@L $A
} KL:6P-3
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堆排序： M'>D[5;N~
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package org.rut.util.algorithm.support; m_r@t*
x[.z"$T@
import org.rut.util.algorithm.SortUtil; r[UyI3(i^
b.%B;qB
/** @kCD.
* @author treeroot .JD4gF2N
* @since 2006-2-2 mER8> <
* @version 1.0 VFO&)E/-
*/ "t%1@b*u
public class HeapSort implements SortUtil.Sort{ yuy+}]uB@
\KnD"0KW
/* (non-Javadoc) %Zv(gI`A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'WM~ bm+N
*/ w ;s ]n
public void sort(int[] data) { gvRc:5B[
MaxHeap h=new MaxHeap(); QU,TAO
h.init(data); &)"7am(S`
for(int i=0;i h.remove(); t7*H8
System.arraycopy(h.queue,1,data,0,data.length); Hq"<vp
} _A~~L6C
v,!Y=8~9
private static class MaxHeap{ s:m<(8WRw
@6i8RmOu}
void init(int[] data){ &=6cz$]z
this.queue=new int[data.length+1]; UVoLHd
for(int i=0;i queue[++size]=data; :UJUh/U
fixUp(size); Fl'xmz^
} #by9D&QP]
} jt10gVC
oX:1 qJrC
private int size=0; ZimMjZ%4
13>3R+o
private int[] queue; e2Kpx8kWj
(&Tb,H)=
public int get() { N`|Ab(.
return queue[1]; 13_+$DhU-L
} x4HMT/@AG2
.'NO~
public void remove() { G &rYz
SortUtil.swap(queue,1,size--); 4f*Ua`E_
fixDown(1); p$b=r+1f
} thm3JfQt
file://fixdown cJ(zidf_$
private void fixDown(int k) { 1R+)T'in
int j; pD}VB6=
while ((j = k << 1) <= size) { .5[LQR
if (j < size %26amp;%26amp; queue[j] j++; !MF"e|W
if (queue[k]>queue[j]) file://不用交换 2cX"#."5p
break; O.up%'%,
SortUtil.swap(queue,j,k); yY@s(:
k = j; ,0<F3h
} X?}GPA4 W
} $vbAcWj
private void fixUp(int k) { g%q?2Nv
while (k > 1) { Qdx`c^4m
int j = k >> 1; X5oW[
if (queue[j]>queue[k]) X^_+%U
break; UN .[,%<s
SortUtil.swap(queue,j,k); 2Fp]S a
k = j; d`],l\oC
} {+UNjKQC
} v YmtpKNj%
aa YQ<
} 8yo6v3JqC
+q_lYGTiO
} .jGsO0
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SortUtil： 3NxaOO`
!wR{Y[Yu
package org.rut.util.algorithm; .L(j@I t
18w^7!F?~u
import org.rut.util.algorithm.support.BubbleSort; g7}z &S;_
import org.rut.util.algorithm.support.HeapSort; SeJFZ0p
import org.rut.util.algorithm.support.ImprovedMergeSort; ,,H$>r_;
import org.rut.util.algorithm.support.ImprovedQuickSort; I}W-5%
import org.rut.util.algorithm.support.InsertSort; KutgW#+40
import org.rut.util.algorithm.support.MergeSort; : $52Ds!i
import org.rut.util.algorithm.support.QuickSort; I9G*iu=U
import org.rut.util.algorithm.support.SelectionSort; 8$jT#\_
import org.rut.util.algorithm.support.ShellSort; `@.s!L(V
+@7x45;D
/** F6GZZKj
* @author treeroot m[Ac'la
* @since 2006-2-2 !wb~A0m
* @version 1.0 xdBZ^Q
*/ QVRokI`BF
public class SortUtil { Gv+Tg/
public final static int INSERT = 1; ?VN]0{JSp
public final static int BUBBLE = 2; (#l_YI -
public final static int SELECTION = 3; T#_n-b>
public final static int SHELL = 4; DGfQo5#
public final static int QUICK = 5; ,ZP3F+XKb
public final static int IMPROVED_QUICK = 6; O\8|niW|
public final static int MERGE = 7; F?,&y)ri
public final static int IMPROVED_MERGE = 8; U!I_i*:U
public final static int HEAP = 9; rs<&x(=Hv
\gzwsT2&
public static void sort(int[] data) { Rd1ku=
sort(data, IMPROVED_QUICK); hy&Hl
} z9kX`M+
private static String[] name={ <%#y^_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q~dg
}; 3(GrDO9^
M^JZ]W(
private static Sort[] impl=new Sort[]{ >=W#z
new InsertSort(), ~md|k
new BubbleSort(), ^FMa8;'o
new SelectionSort(), .rB;zA;4S)
new ShellSort(), n ua8y(W
new QuickSort(), &MQt2aL
new ImprovedQuickSort(), *u4X<oBS*
new MergeSort(), kRXg."b(
new ImprovedMergeSort(), ~$ qJw?r
new HeapSort() |>}0? '/]
}; WKJL< D ]:
}nY^T&?`
public static String toString(int algorithm){ f]A6Mx6
return name[algorithm-1]; `rdfROKv
} WAmoKZw2
R6$F<;nw
public static void sort(int[] data, int algorithm) { #bZ=R
impl[algorithm-1].sort(data); w~KBk)!*
} pBnf^Ew1
CU`Oc>;*T
public static interface Sort { u`Qcw|R+
public void sort(int[] data); Vh2/Ls5
} yz$1qEII`q
HN~4-6[q
public static void swap(int[] data, int i, int j) { tP(bRQ>
int temp = data; ee0>B86tE
data = data[j]; 'U{: zBh
data[j] = temp; 3jeV4|
} v4##(~Tu
} Y6%OV?}v!