[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#aPG<yo
} W7uX
int i1=l; ddKP3}
int i2=mid+1; BT8)t.+pv
for(int cur=l;cur<=r;cur++){ :s_.K'4?a
if(i1==mid+1) +&VY6(Zj+*
data[cur]=temp[i2++]; m0ra
else if(i2>r) H%Vf$1/TF
data[cur]=temp[i1++]; vA_,TS#Bo
else if(temp[i1] data[cur]=temp[i1++]; J?m/u6
else KMy"DVqE
data[cur]=temp[i2++]; ynM~&]fk#k
} ohKoX$|p~
} JYw?
_"Ym]y28li
} DKfpap}8u
IKP_%R8.
改进后的归并排序: uoE+:,P
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package org.rut.util.algorithm.support; B7'#8heDh
Sdmz(R
import org.rut.util.algorithm.SortUtil; PjBAf'
,v})
/** t adeG
* @author treeroot V~KWy@7
* @since 2006-2-2 Pv2uZH(
* @version 1.0 RN)XIf$@_
*/ 9:@Xz5
public class ImprovedMergeSort implements SortUtil.Sort { {f`Y\_r$@
]j:k!=Ss?
private static final int THRESHOLD = 10; MF'Z?M
yOEy3d=*
/* Za!KM
* (non-Javadoc) `mteU"{bx
* 3>7{Q_5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) auAz>6L
*/ MnFrQC
public void sort(int[] data) { hR|xUp
int[] temp=new int[data.length]; \\:%++}J
mergeSort(data,temp,0,data.length-1); 5`fUR/|[
} c]x-mj =
"1Hn?4nz5
private void mergeSort(int[] data, int[] temp, int l, int r) { 9HFEp-"
int i, j, k; e< @$(w
int mid = (l + r) / 2; KPz0;2}
if (l == r) 98u@X:3
return; e.MyJ:eL
if ((mid - l) >= THRESHOLD) eC<RM Q4
mergeSort(data, temp, l, mid); sjLMM_'
else [6RODp3')
insertSort(data, l, mid - l + 1); Rl cL(HM
if ((r - mid) > THRESHOLD) +%9Re5R
mergeSort(data, temp, mid + 1, r); b`+yNf
else z{ eZsh b
insertSort(data, mid + 1, r - mid); Bq)dqLwk
4Us,DS_/
for (i = l; i <= mid; i++) { In?+
temp = data; v=G*K11@
} wX2U
for (j = 1; j <= r - mid; j++) { &AxtSIpucP
temp[r - j + 1] = data[j + mid]; >2>/ q?
} HN`qMGW^
int a = temp[l]; Conik`
int b = temp[r]; =\2gnk~
for (i = l, j = r, k = l; k <= r; k++) { ^wZx=kas
if (a < b) { TC<Rg?&yb
data[k] = temp[i++]; 6c^?DLy9B
a = temp; e)?}2
} else { +$L}B-F
data[k] = temp[j--]; $t& o(]m
b = temp[j]; ;\A_-a_(#
} 8%;Wyqdf]
} 30WOH 'n
} 9teP4H}m
0/]h"5H3
/** }xr0m+/
* @param data V Zbn@1
* @param l /"`hz6rIv
* @param i u*%mUh
*/ hx@@[sKF7
private void insertSort(int[] data, int start, int len) { "__)RHH:8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1qAE)8ie
} <ivG(a*=]
} LyvR].p=5*
} Xe&9|M
} %`s#p` Ol1
R%n*wGi_6b
堆排序： HFjSM~
8*b{8%<K
package org.rut.util.algorithm.support; T&/n.-@nk
cz/E
import org.rut.util.algorithm.SortUtil; Q{S{|.w-
e}{#VB<
/** *^; MWI
* @author treeroot M {'(+a[
* @since 2006-2-2 ?;UR9f|!
* @version 1.0 QhRz57'
*/ gzhIOeY
public class HeapSort implements SortUtil.Sort{ 93.\.&L\
?QKDYH(
/* (non-Javadoc) w6>P[oW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1l)j(,Zd*
*/ 7&P70DO
public void sort(int[] data) { 7wWx8
MaxHeap h=new MaxHeap(); 5V(#nz
h.init(data); dKEy6C"@
for(int i=0;i h.remove(); w2b(,w
System.arraycopy(h.queue,1,data,0,data.length); (5Q<xJ
} RgH 6l2
v9@_DlV\
private static class MaxHeap{ 2Jiy`(P
r<(UN@T}
void init(int[] data){ (p#c p
this.queue=new int[data.length+1]; &Hf%Va[B
for(int i=0;i queue[++size]=data; $FT6c@&y
fixUp(size); _\IA[-C+O
} sd+_NtH
} =pmG.>Si
4s%zvRu
private int size=0; vCt][WX(
7]?y _%kT
private int[] queue; C[Q4OAFG
U:7w8$_
public int get() { F> Ika=z,
return queue[1]; 8VU(+%X
} WQCnkP
&m36h`tM
public void remove() { T; [T`
SortUtil.swap(queue,1,size--); d,i4WKp
fixDown(1); F ]D^e{y
} 73!NoDxb
file://fixdown CTg79 ITYk
private void fixDown(int k) { l{3zlXk3z
int j; n?6^j8i
while ((j = k << 1) <= size) { _?felxG[
if (j < size %26amp;%26amp; queue[j] j++; %LHt{:9.
if (queue[k]>queue[j]) file://不用交换 njJTEUd">
break; gGCr~.5
SortUtil.swap(queue,j,k); P5G0fq7
k = j; DsxNg
} |*ZM{$
} v0&DD&mp
private void fixUp(int k) { :0%[u(
while (k > 1) { dj] O
int j = k >> 1; ^Ar1V!PFk
if (queue[j]>queue[k]) .i )K#82
break; U3]/ NV*
SortUtil.swap(queue,j,k); >_]Ov:5
k = j; PmsZ=FY
} /8:e| ]
} +6+1N)L
Kn1u1@&Xd
} ZBU<L+#
krlebPs[
} elKp?YN
OUN~7]OD%
SortUtil： O['[_1n_u]
oMM@{Jp
package org.rut.util.algorithm; hqHk,#
BUi,+NdIk
import org.rut.util.algorithm.support.BubbleSort; Cv>~%<
import org.rut.util.algorithm.support.HeapSort; h0 %M+g
import org.rut.util.algorithm.support.ImprovedMergeSort; .8'uIA{_2
import org.rut.util.algorithm.support.ImprovedQuickSort; 32j#kJW
import org.rut.util.algorithm.support.InsertSort; 9ec#'i=
import org.rut.util.algorithm.support.MergeSort; 753gcY#i
import org.rut.util.algorithm.support.QuickSort; _a$5"
import org.rut.util.algorithm.support.SelectionSort; pox;NdX7
import org.rut.util.algorithm.support.ShellSort; Wo9=cYC)
ia.+<, $`S
/** YGyw^$.w
* @author treeroot -`spu)
* @since 2006-2-2 fK(:vwh
* @version 1.0 j)Q}5M
*/ * >NML]#0
public class SortUtil { {=!BzNMj
public final static int INSERT = 1; ^^uY)AL
public final static int BUBBLE = 2; 6P(jc
public final static int SELECTION = 3; l%i*.b(
public final static int SHELL = 4; SFP?ND+7
public final static int QUICK = 5; J1M9),
public final static int IMPROVED_QUICK = 6; 9}K K]m6u}
public final static int MERGE = 7; 4},Y0QXw
public final static int IMPROVED_MERGE = 8; eA(FWO
public final static int HEAP = 9; )`|`PB
/a}N6KUi
public static void sort(int[] data) { Zl!
sort(data, IMPROVED_QUICK); #QOb[9(Tu(
} kyYU 1gfh
private static String[] name={ %[L/JJbP&Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &R<K>i
}; HDE5Mg "
]d|M@v~c4
private static Sort[] impl=new Sort[]{ 1!+0]_8K
new InsertSort(), 3$_- 0>
new BubbleSort(), #w^Ot*{!N
new SelectionSort(), *r~6R
new ShellSort(), "Rf|o6!d
new QuickSort(), -4J.YF>
new ImprovedQuickSort(), a9 S&n5
new MergeSort(), TEK#AR
new ImprovedMergeSort(), //$^~}wt
new HeapSort() w17{2']
}; "yU<X\ni
)iPU
public static String toString(int algorithm){ U~zy;MT
return name[algorithm-1]; %f&Bt,xEo
} ^s=F<_{
yRhD<*
public static void sort(int[] data, int algorithm) { 5ry[Lgg
impl[algorithm-1].sort(data); Z\1`(Pq7`
} 0!axAvBV
mxc^IRj
public static interface Sort { Z0V6cikW6
public void sort(int[] data); 54s90
} 0(uba3z
@'J~(#}
public static void swap(int[] data, int i, int j) { gV5mERKs
int temp = data; rb>2l3g*
data = data[j]; 6k7x7z
data[j] = temp; dleLX%P
} v,3}YDu
} oO;<$wx2t