[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; 51;(vf
} 5/P?@`/eT
int i1=l; Uk;SY[mU
int i2=mid+1; "-<u.$fE
for(int cur=l;cur<=r;cur++){ ,=6Eju#P
if(i1==mid+1) 4sZ^:h,1
data[cur]=temp[i2++]; &g) `
else if(i2>r) &.(ZO]
data[cur]=temp[i1++]; 8% 1hfj
else if(temp[i1] data[cur]=temp[i1++]; )\VUAD%~e7
else h.2!d0j]
data[cur]=temp[i2++]; y62;&{?m
} fEQ<L!'
} @4$F%[g h
#M`ijN!Y
} rKJ%/7m
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改进后的归并排序: JxD@y}ZYE
X:62)^~'
package org.rut.util.algorithm.support; G|^gaj'9
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import org.rut.util.algorithm.SortUtil; k9R1E/;
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/** NoYu"57\
* @author treeroot ^@[[,1"K
* @since 2006-2-2 ?;{A@icr
* @version 1.0 ]"CAP%
*/ j./bVmd.
public class ImprovedMergeSort implements SortUtil.Sort { l0Pg`wH,
]L&_R^
private static final int THRESHOLD = 10; :K8T\
,cC4d`
/* %eT/:I
* (non-Javadoc) dOiy[4s
* #4cuNX5m%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O^:Pr8|{J
*/ R [uo:.
public void sort(int[] data) { !J2Lp
int[] temp=new int[data.length]; {g )kT_
mergeSort(data,temp,0,data.length-1); y"9TS,lmK
} `DA=';>Y
}%XNB1/`
private void mergeSort(int[] data, int[] temp, int l, int r) { y|lP.N/
int i, j, k; {O^1WgGc[
int mid = (l + r) / 2; YK[O#V
if (l == r) ?xG #4P<C=
return; ^WD[>E~
if ((mid - l) >= THRESHOLD) '*~{1gG `
mergeSort(data, temp, l, mid); xMuy[)b
else "= UP&=
insertSort(data, l, mid - l + 1); {'}Ofj
if ((r - mid) > THRESHOLD) iySmNI
mergeSort(data, temp, mid + 1, r); xHL{3^
else bpU^|r^W
insertSort(data, mid + 1, r - mid); i&bttSRNV
c2F`S1Nu<
for (i = l; i <= mid; i++) { sY#K=5R
temp = data; { aB_t%`w
} E=x\f "Z
for (j = 1; j <= r - mid; j++) { "thu@~aC
temp[r - j + 1] = data[j + mid]; $==hr^H
} f,uxoAS
int a = temp[l]; R0=/ Th -
int b = temp[r]; "3>#[o
for (i = l, j = r, k = l; k <= r; k++) { rB7(&(n>^
if (a < b) { j<gnh
data[k] = temp[i++]; .#}SK!"B
a = temp; $YSOkyC?
} else { h\ybh
data[k] = temp[j--]; @'U4-x
b = temp[j]; ^#Z(&/5f0
} f~U|flL^
} B}!n6j`
} #IXQ;2%E
<T&$1m{
/** 8t7hN?,t
* @param data M,{F/Yu
* @param l c,-< 4e
* @param i lA ,%'+-
*/ ]O\6.>H
private void insertSort(int[] data, int start, int len) { Df4n9m}E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :@3d
} K:{Q~+
} 8uu:e<PLv
} Ln: y|t
} rms&U)?
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堆排序： i4-L!<bJ
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package org.rut.util.algorithm.support; cK?t]%S
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import org.rut.util.algorithm.SortUtil; )a6i8b3
}i[jJb`bY
/** MdKZH\z/
* @author treeroot m|y]j4
* @since 2006-2-2 S xgYq
* @version 1.0 vSyN_AB?$
*/ [Q*kom :
public class HeapSort implements SortUtil.Sort{ W"0#
kP6r=HH@
/* (non-Javadoc) fXqe7[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mB :lp=c`
*/ yQW\0&a$
public void sort(int[] data) { %NBD^gF
MaxHeap h=new MaxHeap(); )I<.DN&
h.init(data); xv ja
for(int i=0;i h.remove(); X >**M
System.arraycopy(h.queue,1,data,0,data.length); zz9.OnZ~
} +`4|,K7'
;F:(5GBi
private static class MaxHeap{ vB,N6~r>
~9n@MPS^!
void init(int[] data){ ^1g6(k'
this.queue=new int[data.length+1]; '=ZE*nGC
for(int i=0;i queue[++size]=data; -g>27EI5
fixUp(size); (0][hdI~B
} ;js7rt
} "K@os<
z~W@`'f
private int size=0; v3/cNd3
7}#vANm
private int[] queue; 9UwDa`^
eMF%!qUr
public int get() { $W2g2[+
return queue[1]; (I+-wki"e
} g7H;d
s810714
public void remove() { :{fsfZXXr
SortUtil.swap(queue,1,size--); kz&)a>aA
fixDown(1); !1l2KW<be
} I?PKc'b
file://fixdown qV}zV\Nz
private void fixDown(int k) { S38D cWIw
int j; _A,m@BCz
while ((j = k << 1) <= size) { e*g; +nz
if (j < size %26amp;%26amp; queue[j] j++; 87HVD Di
if (queue[k]>queue[j]) file://不用交换 n% *u;iG
break; o#T,vu0s
SortUtil.swap(queue,j,k); +F/'+
k = j; tQ)8HVKF
} Wb|IWnH$
} b2),J
private void fixUp(int k) { LJiMtqg
while (k > 1) { ~E!"YkIr
int j = k >> 1; Rub""Ga
if (queue[j]>queue[k]) X23TS`
break; ;6]+/e7O
SortUtil.swap(queue,j,k); *s!8BwiE
k = j; )sL:iGU
} FVSz[n
} 7Ua Ll
S<>e(x3g]
} 2`lit@u&u
)jH"6my_
} ,:#prT[P"
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SortUtil： ?>,aq>2O$
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package org.rut.util.algorithm; ,og@}gOMB
9<Bf5d
import org.rut.util.algorithm.support.BubbleSort; O,bj_CWx
import org.rut.util.algorithm.support.HeapSort; y/PEm)=Tt
import org.rut.util.algorithm.support.ImprovedMergeSort; }^QY<Cp|
import org.rut.util.algorithm.support.ImprovedQuickSort; $zdJ\UX
import org.rut.util.algorithm.support.InsertSort; 6 o+zhi;E
import org.rut.util.algorithm.support.MergeSort; ;~@2YPj
import org.rut.util.algorithm.support.QuickSort; eAl&[_o|S
import org.rut.util.algorithm.support.SelectionSort; 0h; -Yg
import org.rut.util.algorithm.support.ShellSort; YY.;J3C
./6L&?*`~;
/** ;bZ)q
* @author treeroot 1di?@F2f
* @since 2006-2-2 v5*SoUOF
* @version 1.0 E7*]t_p"
*/ }R J2\CP
public class SortUtil { } HvVL}7
public final static int INSERT = 1; F\XzP\
public final static int BUBBLE = 2; xi.;`Q^#
public final static int SELECTION = 3; `j<'*v zo
public final static int SHELL = 4; un\"1RdO
public final static int QUICK = 5; e0hT
public final static int IMPROVED_QUICK = 6; bG5c~
public final static int MERGE = 7; rL%xl,cn<
public final static int IMPROVED_MERGE = 8; Dm5UQe
public final static int HEAP = 9; CUYp(GU
Pajr`gU
public static void sort(int[] data) { 0.Iw/e
sort(data, IMPROVED_QUICK); K|s+5>]W/[
} 9,9( mbWJv
private static String[] name={ *M8 4Dry`y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H%/$Rqg
}; J"SAA0)@
L ~
private static Sort[] impl=new Sort[]{ b?Vu9!
new InsertSort(), +C+3DwN
new BubbleSort(), k|BEAdQ%M
new SelectionSort(), F 6SIhf.;
new ShellSort(), *rqih_j0
new QuickSort(), z~X]v["d
new ImprovedQuickSort(), QGsUG_/_P
new MergeSort(), bb#w]!q
new ImprovedMergeSort(), t=U[ ;?
new HeapSort() mWigy`V^~
}; TX 12$p\
.!Z.1:YR
public static String toString(int algorithm){ :1AOund
return name[algorithm-1]; %u!#f<"[
} z?cRsqf
(apAUIE
public static void sort(int[] data, int algorithm) { 0tl
impl[algorithm-1].sort(data); ?XeRL<n
} =b;v:HC
6)H70VPJ
public static interface Sort { aeg5ij-]u@
public void sort(int[] data); B\4SB
} `!rHH
[y'jz~9c
public static void swap(int[] data, int i, int j) { RJGf@am&
int temp = data; (3_2h4O
data = data[j]; HeR-;L
data[j] = temp; zf^!Zqn[8z
} ?X=9@m
} u(d>R5}'