[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; {hqAnZ@]vr
} !:fv>FEI9
int i1=l; Omag)U)IPh
int i2=mid+1; $E(XjuS
for(int cur=l;cur<=r;cur++){ 9 1P4:6
if(i1==mid+1) zuL7%qyv
data[cur]=temp[i2++]; N dR ]
else if(i2>r) :#="%
data[cur]=temp[i1++]; |$hgT K[L
else if(temp[i1] data[cur]=temp[i1++]; ,#'7)M D8
else q42FPq
data[cur]=temp[i2++]; GVd48*
} s&*yk p
} d*;$AYI#R
[@{0o+.]'H
} IftxSaP
3;$bS<>
改进后的归并排序: 6Dm+'y]l
_:,.yRez
package org.rut.util.algorithm.support; +G!v!(Ob+
~PUsgL^
import org.rut.util.algorithm.SortUtil; Pe,;MP\2
9H$g?';
/** 8xo;E=`
* @author treeroot YeIe\3x!N
* @since 2006-2-2 nL;K|W
* @version 1.0 Gm@iV,F%R
*/ ~x+Ykq0
public class ImprovedMergeSort implements SortUtil.Sort { 9 x [X<
7ti<
private static final int THRESHOLD = 10; /Hk07:"c
1,u{&%yL"w
/* n`#+L~X
* (non-Javadoc) zg0%>iqO
* gN\*Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ![q}BU4
*/ p[;8
public void sort(int[] data) { KQW!\y?$"
int[] temp=new int[data.length]; ~GYpat
mergeSort(data,temp,0,data.length-1); "0<Sd?Sz
} qV?sg
0i_
private void mergeSort(int[] data, int[] temp, int l, int r) { m\} =4b
int i, j, k; cCYl$MskZ
int mid = (l + r) / 2; J2Y 3er
if (l == r) IPkA7VhFF
return; rkP4<E-M
if ((mid - l) >= THRESHOLD) (-#rFO5~l
mergeSort(data, temp, l, mid); Vy&f"4~
else "h`54}0
insertSort(data, l, mid - l + 1); _p$"NNFN
if ((r - mid) > THRESHOLD) 3P3:F2S R
mergeSort(data, temp, mid + 1, r); y 2cL2c$BT
else &,_?>.\[<
insertSort(data, mid + 1, r - mid); U"/yB8!W
nxf{PbHk
for (i = l; i <= mid; i++) { HUD7{6}4
temp = data; ;*"!:GR%h
} #efqG=q
for (j = 1; j <= r - mid; j++) { jaL$LJV
temp[r - j + 1] = data[j + mid]; @yCW8]
} ;!^ +N
int a = temp[l]; 9PUa?Bc`=
int b = temp[r]; W{L
for (i = l, j = r, k = l; k <= r; k++) { 5#yJK>a7
if (a < b) { xcAF
data[k] = temp[i++]; :,urb*
a = temp; 0>I]=M]@
} else { [0d-CEp[
data[k] = temp[j--]; v&k>0lV,^
b = temp[j]; )PsN_ 42~
} u-8X$aJ
} ZTN:|IKT
} L7i}Ga!8
}R7sj
/** /UEV8 1
* @param data L$oia)%t-
* @param l D{Hh#x8Y
* @param i UY?i E=
*/ e6tH/`Uln
private void insertSort(int[] data, int start, int len) { ckH$E%j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [Ihp\!xqI
} xn%l
} }:,o Y<
} fW_}!`:
} ZXFAuF
"N?%mCPI
堆排序： 2VoEQ
$|`t9-EA/
package org.rut.util.algorithm.support; ~zXG<}n
]7XkijNb
import org.rut.util.algorithm.SortUtil; .}L-c>o"o
el2*\(XT
/** >z fq*_
* @author treeroot @%I_&!d
* @since 2006-2-2 zIAu3
* @version 1.0 +d6Aw}*
*/ I =tyQ`
public class HeapSort implements SortUtil.Sort{ [*Aqy76Qa
m>Yo9/XpZ
/* (non-Javadoc) .-O@UQx.I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]Omb :
*/ Dr8WV\4@
public void sort(int[] data) { o+"0.B
MaxHeap h=new MaxHeap(); `wn<3#
h.init(data); 8osS OOzM
for(int i=0;i h.remove(); }rj C_q
System.arraycopy(h.queue,1,data,0,data.length); n!l./>N
} Oet#wp/I
#Vn>ue+?
private static class MaxHeap{ @aqd'O
(_i vN
void init(int[] data){ *D09P%
this.queue=new int[data.length+1]; 6`s%%v
for(int i=0;i queue[++size]=data; </+%R"`
fixUp(size); {LB }v;?l
} 1{hoO<CJ
} YP$*;l
mD^qx0o<
private int size=0; @sgT[P*ut
quCWc2pXX
private int[] queue; wEHAkc)Q
}`<>$2b
public int get() { @ (u?=x;
return queue[1]; JXSqtk=
} Qa7S'(
+/~\b/
public void remove() { VhH]n yi7D
SortUtil.swap(queue,1,size--); K9I,Q$&xX
fixDown(1); \yX !P1
} Kt4\&l-De
file://fixdown @7HOL-i
private void fixDown(int k) { rs 1*H
int j; H/@M
while ((j = k << 1) <= size) { Dt~}9HrU
if (j < size %26amp;%26amp; queue[j] j++; xv#j 593
if (queue[k]>queue[j]) file://不用交换 @R OY}CZ{/
break; ,~j$rs`Z
SortUtil.swap(queue,j,k); <v7KE*#
k = j; ]}l+ !NV<
} 0Yzb=QMD
} "!6 B5Oz
private void fixUp(int k) { J! 6z
while (k > 1) { -g[*wN8
int j = k >> 1; da?th
if (queue[j]>queue[k]) 4gv XJK-
break; > ^v8N
SortUtil.swap(queue,j,k); :56lzsWUE<
k = j; Tx!m6B`Y
} DN8pJa
} 1uge>o&
hv:Z%D |S
} FTYLMQ i
hL{B9?
} ][5p.owJse
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SortUtil： $9i5<16
5B.??;xtaV
package org.rut.util.algorithm; 7fzyD
JdYF&~
import org.rut.util.algorithm.support.BubbleSort; N evvA(M
import org.rut.util.algorithm.support.HeapSort; c+)|o!d
import org.rut.util.algorithm.support.ImprovedMergeSort; D_ZBx+/_?
import org.rut.util.algorithm.support.ImprovedQuickSort; a=B0ytNm
import org.rut.util.algorithm.support.InsertSort; \HQb#f,
import org.rut.util.algorithm.support.MergeSort; >)A
import org.rut.util.algorithm.support.QuickSort; Cm}UWX
import org.rut.util.algorithm.support.SelectionSort; Isgk
import org.rut.util.algorithm.support.ShellSort; Rw{v"n
?{z${ bD
/** KP7RrgOan&
* @author treeroot QRHm|f9_C
* @since 2006-2-2 i|^`gly
* @version 1.0 8Bt-
*/ x-#9i
public class SortUtil { h-rj
public final static int INSERT = 1; _]ttKT(
public final static int BUBBLE = 2; q4ko}jn
public final static int SELECTION = 3; ZznWs+
public final static int SHELL = 4; \fR:+rbQ&|
public final static int QUICK = 5; h16Nr x
public final static int IMPROVED_QUICK = 6; 446hrzW>@
public final static int MERGE = 7; *Z2Q]?:{ i
public final static int IMPROVED_MERGE = 8; . _t,OX$
public final static int HEAP = 9; n rB27
>,Bu^] C
public static void sort(int[] data) { 5XUI7Q%
sort(data, IMPROVED_QUICK); S^VV^O5 ^
} : 8<^rP
private static String[] name={ (*Q|;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" j2qfEvU
}; P]x+Q
o5x^"#
private static Sort[] impl=new Sort[]{ a&VJYAB
new InsertSort(), K$5P_~;QL
new BubbleSort(), g uWqHVSs
new SelectionSort(), ZxPAu%Y
new ShellSort(), q;PzB4#
new QuickSort(), kj=2+)!E7
new ImprovedQuickSort(), T2; 9
new MergeSort(), B"zg85 e
new ImprovedMergeSort(), #7T={mh
new HeapSort() eSBf;lr=
}; d$~b`
GZX!iT
public static String toString(int algorithm){ N,Bs% p#1
return name[algorithm-1]; )II,HT-LY
} R_&z2I
$*-L8An?
public static void sort(int[] data, int algorithm) { rO%+)M$A
impl[algorithm-1].sort(data); FRk_xxe"K
} mXaUWgO
.WE0T|qDX
public static interface Sort { +[[gU;U"v
public void sort(int[] data); ,peE'
} GTNTx5H
}TL"v|ny6;
public static void swap(int[] data, int i, int j) { hI{Yg$H1
int temp = data; xyz86r ^u
data = data[j]; 7~f6j:{|z
data[j] = temp; oU?X"B9
} W%cPX0
} d6&tz!f