[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; U~Ni2|}\C9
} gD=s~DgN)
int i1=l; dAEz hR[=
int i2=mid+1; %E1~I\n:F
for(int cur=l;cur<=r;cur++){ 5tP0dQYd
if(i1==mid+1) K_]LK
data[cur]=temp[i2++]; eX?o4>
else if(i2>r) v&H&+:<
data[cur]=temp[i1++]; 'AeU
else if(temp[i1] data[cur]=temp[i1++]; WRVKh
else 4I:Jb;k>
data[cur]=temp[i2++]; g/`i:=
} ^%go\ C ;
} xd(AUl4qY
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} eqeVz`
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改进后的归并排序: +]uy
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package org.rut.util.algorithm.support; 5 Nl>4d`
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import org.rut.util.algorithm.SortUtil; @sfV hWG
]d$)G4X1
/** eDaVoc3
* @author treeroot O;H/15j:sK
* @since 2006-2-2 .]r[0U
* @version 1.0 U?#6I-
*/ G92=b*x/
public class ImprovedMergeSort implements SortUtil.Sort { CXUNdB
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private static final int THRESHOLD = 10; Yv"uIj+']
i.F[.-.
/* z W+wtYV4
* (non-Javadoc) HkEp}R
* c%xxsq2n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4`Fbl]Q
*/ mT!~;]RrF
public void sort(int[] data) { [W^6=7EO
int[] temp=new int[data.length]; IDLA-Vxo
mergeSort(data,temp,0,data.length-1); zKT \i
} Xj!0jF33
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private void mergeSort(int[] data, int[] temp, int l, int r) { @Ki`g(],P
int i, j, k; uidE/7
int mid = (l + r) / 2; Q8\Ks|u]
if (l == r) yGS._;#R
return; i~K~Czmok+
if ((mid - l) >= THRESHOLD) |$1j;#h
mergeSort(data, temp, l, mid); Ui?t@.
else Bb-x1{t
insertSort(data, l, mid - l + 1); Ma{|+\Q.Z
if ((r - mid) > THRESHOLD) a2).Az
mergeSort(data, temp, mid + 1, r); (5Cm+Sy
else jriliEz;f
insertSort(data, mid + 1, r - mid); VaQ}XM
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for (i = l; i <= mid; i++) { [0J0<JnK
temp = data; 8(g:i#~
} 0'L+9T5
for (j = 1; j <= r - mid; j++) { #>>-:?X
temp[r - j + 1] = data[j + mid]; rJ<v1Yb
} CZbp}:|
int a = temp[l]; n*_FC
int b = temp[r]; {},GxrQm
for (i = l, j = r, k = l; k <= r; k++) { F'`L~!F
if (a < b) { $vc:u6I[
data[k] = temp[i++]; >TtkG|/U-T
a = temp; E@[`y:P
} else { a2p<HW;)m
data[k] = temp[j--]; \/lS!+~'']
b = temp[j]; iL5+Uf)E3
} }0f[x ?V
} %} \@Wk~
} uWMAXGL
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/** ,gRsbC
* @param data .!=g
* @param l BH%eu 7`t
* @param i lfWxdi
*/ FtY*I&
private void insertSort(int[] data, int start, int len) { zXMIDrq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >Wy@J]Y#
} qY0GeE>N
} 6'?Y]K
} }vcC4 =t/
} Yo:>m*31
sFB; /*C
堆排序： Ym0Xl(Se
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package org.rut.util.algorithm.support; ^V>sNR
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import org.rut.util.algorithm.SortUtil; }R.cqk\qa^
})ss.
/** kGX`y.-[
* @author treeroot #9p{Y}2#
* @since 2006-2-2 gxL5%:@
* @version 1.0 '<8ewU
*/ cH"M8gP#
public class HeapSort implements SortUtil.Sort{ 0y|}}92:
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/* (non-Javadoc) c+-L>dsss
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0UlaB sv
*/ .$S`J2Y
public void sort(int[] data) { 0nA17^W
MaxHeap h=new MaxHeap(); 0$* z
h.init(data); $NJi]g|<3
for(int i=0;i h.remove(); nG{jx_{`
System.arraycopy(h.queue,1,data,0,data.length); O/l|\n
} RQ9T<t42
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private static class MaxHeap{ 'J]V"Z)
4z[Z3|_V
void init(int[] data){ aI+:rk^
this.queue=new int[data.length+1]; pD.7ib^
for(int i=0;i queue[++size]=data; F]SexP4:A
fixUp(size); Qh)@-r3
} ToDN^qE+
} =^=9z'u"=
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private int size=0; 7P!/jawxb
$7M64K{
private int[] queue; ]@M$.msg@
Yq<D(F#qx
public int get() { j:$2,?|5
return queue[1]; A^%z;( 0p
} #.a4}ya19
T"8>6a@}E
public void remove() { 4$d|}ajH
SortUtil.swap(queue,1,size--); $U"/.Mh\
fixDown(1); %+FM$xyJ
} o<@2zhuhrx
file://fixdown )v8;\1`s:
private void fixDown(int k) { NzNAhlXj3
int j; VLu_SXlo*
while ((j = k << 1) <= size) { xWn.vSos
if (j < size %26amp;%26amp; queue[j] j++; tCtR(mG=A
if (queue[k]>queue[j]) file://不用交换 [,|KVc=&H
break; r/:s2oQ
SortUtil.swap(queue,j,k); 7Cp>iWV
k = j; Vg6?a
} x-CYG?-x
} JB''Ujyi
private void fixUp(int k) { !bT0kP$3}
while (k > 1) { ZEUd?"gaR
int j = k >> 1; R 5bt~U
if (queue[j]>queue[k]) RAXqRP,iw
break; tNmH*"wR<
SortUtil.swap(queue,j,k); {eqUEdC
k = j; H,KU!1p
} Rb\=\
} B2WPjhzD
dq"b_pr;
} p0`Wci
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} c@5fiRPv!
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SortUtil： Q3wD6!'&m
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package org.rut.util.algorithm; ZCbxL.fFz
06 K8|K
import org.rut.util.algorithm.support.BubbleSort; %jKR\f G
import org.rut.util.algorithm.support.HeapSort; Y?ZTl762
import org.rut.util.algorithm.support.ImprovedMergeSort; V|#B=W
import org.rut.util.algorithm.support.ImprovedQuickSort; T1\Xz-1
import org.rut.util.algorithm.support.InsertSort; L>xcgV7
import org.rut.util.algorithm.support.MergeSort; w v9s{I{P
import org.rut.util.algorithm.support.QuickSort; =h5&\4r=
import org.rut.util.algorithm.support.SelectionSort; m\"M`o B
import org.rut.util.algorithm.support.ShellSort; W4|1wd}.t
qSkt }F%'
/** s2b!Nib
* @author treeroot Xb#x^?|
* @since 2006-2-2 %zb7M%dC6`
* @version 1.0 "&Q-'L!M'/
*/ 3vQ?vS|2
public class SortUtil { ItC*[
public final static int INSERT = 1; iWGgt]RJ
public final static int BUBBLE = 2; htMsS4^Kvd
public final static int SELECTION = 3; <kPU*P,
public final static int SHELL = 4; ,Xo9gn
public final static int QUICK = 5; tojJQ6;J
public final static int IMPROVED_QUICK = 6; J);1Tpm
public final static int MERGE = 7; 3`SLMPI
public final static int IMPROVED_MERGE = 8; ehOF@IA_
public final static int HEAP = 9; T/)$}#w0i
AG/nX?u7)t
public static void sort(int[] data) { *)L%pH>`
sort(data, IMPROVED_QUICK); 8kH'ai
} 84e)huAs
private static String[] name={ aNv6 "
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1S 0GjR
}; ZKAIG=l&!
X7NRQ3P@
private static Sort[] impl=new Sort[]{ P,xayy
new InsertSort(), h9>~?1$lz
new BubbleSort(), Vy-H3BR
new SelectionSort(), XH1so1h
new ShellSort(), W%Br%VQJ
new QuickSort(), p9oru0q
new ImprovedQuickSort(), F3,hx
new MergeSort(), rM=Q.By+\
new ImprovedMergeSort(), v|t^th,
new HeapSort() |Wi$@sWO
}; 6.KR(V
_S2QY7/
public static String toString(int algorithm){ .;/@k%>
return name[algorithm-1]; )nQpO"+M
} :g+R}TR[i
I&Yu=v/_
public static void sort(int[] data, int algorithm) { 6>Lr
impl[algorithm-1].sort(data); /bfsC& 3
} -[0)n{AVvU
Ax=Rb B"
public static interface Sort { amlE5GK;
public void sort(int[] data); Ks8S^77
} tA}O'x
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public static void swap(int[] data, int i, int j) { NnrX64|0
int temp = data; 19bP0y
data = data[j]; Kn=P~,FaG3
data[j] = temp; oxHS7b
} c5R58#XK=
} %CD}A%~